CN1825422A - Image display device, method of generating correction value of image display device, program for generating correction value of image display device, and recording medium recording program thereon - Google Patents

Image display device, method of generating correction value of image display device, program for generating correction value of image display device, and recording medium recording program thereon Download PDF

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CN1825422A
CN1825422A CN 200610008050 CN200610008050A CN1825422A CN 1825422 A CN1825422 A CN 1825422A CN 200610008050 CN200610008050 CN 200610008050 CN 200610008050 A CN200610008050 A CN 200610008050A CN 1825422 A CN1825422 A CN 1825422A
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value
image
mentioned
output characteristics
display device
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CN100444627C (en
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山田喜士
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Seiko Epson Corp
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Seiko Epson Corp
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Abstract

Provided is a method of generating correction data of an image display device with which correction values do not become a huge amount and an image can be highly accurately corrected. The method of generating correction data of an image display device comprises: a distribution detecting step S21 of detecting distribution of an output characteristic value of an image displayed on a screen; a contour line interval setting step S22 of setting the interval of a contour line connecting pixels of approximately equal output characteristic values on the basis of the distribution of the detected output characteristic value; a contour line setting step S23 of setting a plurality of contour lines based on the set contour line interval; a node setting step S25 of setting a plurality of nodes on each of the set contour lines; a divided element setting step S26 of dividing the inside of the image displayed on the screen into a plurality of element regions on the basis of the set node; and a correction value setting step S27, S28 of setting a correction value for each of the divided element regions.

Description

Image display device and modified value method for making thereof and program and recording medium
Technical field
The present invention relates to image display device, the modified value method for making of image display device, and the modified value of image display device makes program, and record this program recording medium.
Background technology
In the image display device of the fixed pixel type of projector, LCD, plasma display etc., with and during the paired image forming apparatus display image of the screen of display image, sometimes produce distribution in the output characteristics values such as the brightness output valve of the part of the image on being shown in screen and color output valve, such deviation is spared as the even irregular colour of brightness disproportionation of the image that shows on screen and is found out.It is generally acknowledged this brightness irregularities, irregular colour even etc. be owing to constitute the foozle etc. of element of the pixel of image forming apparatus such as liquid crystal light valve and cause.
Such brightness irregularities, irregular colour are even etc. because can be that the electric signal that unit produces the distribution of output characteristics value is eliminated by revising with the pixel, so propose to have multiple modification method in the past.
For example, such technology has been proposed, promptly, when the correction that the irregular colour of determining to be shown in the image on the screen is spared, store the correction data of each gray scale in advance to being shown in integral image on the screen, screen is divided into gridiron pattern shape, carries out even revise (for example, with reference to the patent documentation 1) of irregular colour by each image after cutting apart being suitable for the data based gray scale of correction.
In addition, as another example such technology has been proposed, promptly, the image segmentation triangularity key element that is shown on the screen, generate the correction data on each summit of this triangle key element, by generate the correction data of triangle key element inside according to the correction data interpolation on each summit, carry out even revise (for example, with reference to the patent documentation 2) of irregular colour of image.
[patent documentation 1] spy opens 2000-284773 communique (Fig. 1, paragraph (0024)～(0029))
[patent documentation 2] spy opens 2000-316170 communique (Fig. 2, paragraph (0068))
But disclosed technology is to cut apart display image with uniform polygon key element in above-mentioned patent documentation, and there is following problem in the technology of revising in each segmented element.
Promptly, if improve the precision of revising, obtain high quality images, just must increase the number of cutting apart of screen, the quantitative change that is stored in the modified value in the look-up table etc. of image display device gets huge, has the problem that needs jumbo storer in order to store such look-up table.
On the other hand, in order to reduce the amount of modified value as far as possible, consider to cut apart, being stored in the look-up table with the corresponding modified value of a spot of segmented element number with big polygon key element.But in this case, because coarse easily based on the correction of modified value, correction image accurately is so exist the problem that significantly improves that can not expect image quality.Particularly for the part partially even etc. the image of brightness irregularities, irregular colour, the possibility height that can not successfully revise.
Summary of the invention
The object of the present invention is to provide the correction value generation method of a kind of amount that does not have a huge modified value and image display device that can the high precision correction image, be used to allow computing machine carry out the program of this method, and image display device.
The modified value method for making of image display device of the present invention, make the above-mentioned modified value of image display device, above-mentioned image display device possess with the output characteristics value of the paired image forming apparatus of the screen of display image on have distribution image-display units and according to the picture signal of the corresponding modified value correction input of the distribution of above-mentioned output characteristics value after output to the amending unit of above-mentioned image display device, it is characterized in that, comprising:
Detection is presented at the step of distribution of the output characteristics value of the image on the above-mentioned screen;
Distribute according to detected output characteristics, in this output characteristics distributes, set the step of node;
The node of having set connected to each other is divided into the step in a plurality of key elements zone;
Set the step of modified value according to each key element zone of having cut apart.
According to the present invention, because node is set in the distribution according to the output characteristics value of detected image, the node of having set connected to each other and be divided into a plurality of key elements zone, on each key element zone, set modified value, so, can set the modified value suitable accordingly with the distribution of output characteristics value, the amount of modified value can be not huge, and can revise accurately.
At this, the modified value method for making of image display device of the present invention can be reached with following 2 ways, be not only the invention that relates to the modified value method for making, as the image display device that possesses the modified value that useful each modified value method for making makes, and make computing machine carry out the program of modified value method for making, record this program recording medium and also set up.
■ 1. utilizes the equipotential line of the distribution of output characteristics value to make the method for modified value
Image display device of the present invention possesses and has: with the output characteristics value of the paired image forming apparatus of the screen of display image in the image-display units of distribution is arranged, with according to and the picture signal of the corresponding modified value correction of the distribution of above-mentioned output characteristics value input after output to the amending unit of above-mentioned image-display units, it is characterized in that
Above-mentioned amending unit possesses:
Set a plurality of output characteristics value equipotential lines that are presented at the pixel in the image on the above-mentioned screen about equally that linked according to the distribution of output characteristics value, according to a plurality of nodes that are set on each equipotential line the image segmentation that is presented on the above-mentioned screen is become a plurality of key elements zone, according to the modified value storage part of each key element area stores modified value of cutting apart;
According to the modified value that is stored in above-mentioned modified value storage part, the correcting process portion of the picture signal of above-mentioned input being revised according to above-mentioned each key element zone.
According to the present invention, according to a plurality of nodes that are set on the equipotential line image segmentation that is presented on the screen is become a plurality of key elements zone, by setting modified value according to each key element zone of having cut apart, can correspondingly revise with the distribution of the output characteristics value that is presented at the image on the screen, can revise the distribution of output characteristics value accurately.Thereby, can enough modified values of also lacking than method in the past carry out high-precision correction, do not need the storer of storage modified value etc. is set to high capacity, the image display device of demonstration high quality image just can be set.
Preferred in the present invention key element zone is the key element zone of mutual nonoverlapping polygon made from the node on the straight line equipotential line connected to each other, and the modified value storage part possesses the node location information of the interior position of the screen in each key element zone of storage representation and the accuracy table of key element area stores table, storage and the corresponding modified value of corrected parameter of the corrected parameter in the key element zone that provides with node location information.
According to the present invention, because relevant with key element information and the actual modified value of revising are stored in separately the table, so can reduce the data volume relevant with modified value.
Preferred in the present invention storage and the corresponding a plurality of modified values of different gray level images in the modified value storage part.
According to the present invention, because can be by corresponding a plurality of modified values such as γ characteristic of storage with image-display units, the correction that suits according to the gradation of image that shows on image-display units is so can be arranged to show the more image display device of high quality image.
Preferred in the present invention output characteristics value is the brightness output valve or the color output valve of above-mentioned image forming apparatus.
According to the present invention, because it is even to revise the brightness irregularities, the irregular colour that easily go wrong as image display device, so can be arranged to revise aptly the deviation of these image-display units that arouse attention easily, the image display device of high quality image can be provided.
The modified value method for making of image display device of the present invention is made the modified value in the amending unit of storing above-mentioned image display device.Specifically, the correction method for making of image display device of the present invention is made the above-mentioned modified value of image display device, and above-mentioned image display device possesses: with the output characteristics value of the paired image forming apparatus of the screen of display image in have the image-display units of distribution; According to the picture signal of the corresponding modified value correction of the distribution of above-mentioned output characteristics value input after output to the amending unit of above-mentioned image-display units, it is characterized in that, comprising:
The distribution of distribution that detection is presented at the output characteristics value of the image on the above-mentioned screen detects step;
According to the distribution of detected output characteristics value, set the equipotential line at the interval of the equipotential line that links output characteristics value pixel about equally and set step at interval;
According to the equipotential line of setting at interval, the equipotential line of setting many equipotential lines is set step;
On each equipotential line of setting, set the node of a plurality of nodes and set step;
According to the node of setting, set step cutting apart the segmented element that is set at a plurality of key elements zone in the image that is presented on the above-mentioned screen;
Set the step of modified value according to each key element zone of having cut apart.
According to the present invention, because MIN data volume that can enough necessity is made the modified value in the amending unit that is stored in image display device, so need in image display device, not use storage unit such as jumbo reservoir.In addition, because revise, so can carry out revising the modified value that can obtain to carry out the high precision correction accordingly with distributing to the output characteristics value of the image that is shown in screen according to a plurality of nodes that are set on the equipotential line.
Set step at interval as above-mentioned equipotential line in the present invention and can consider following method.
(1) obtains by distribution and detect the step that differs the part of output characteristics value farthest from the former output characteristics value that should show according to detected output characteristics value, and, set equipotential line method at interval the step that near the equipotential line the test section of obtaining is set also narrowlyer than other parts at interval.According to such equipotential line establishing method at interval, because can on tiny key element zone, very carefully revise even etc. the part of eye-catching especially brightness irregularities, irregular colour, so effective when correction has the distribution of output characteristics value of peak value.
(2),, set equipotential line method at interval the step that near the equipotential line the histogrammic peak value that generates is set narrowly at interval by distribution generation and the corresponding histogrammic step of output characteristics value according to detected output characteristics value.According to such equipotential line establishing method at interval, because it is even etc. carefully to revise brightness irregularities, irregular colour in wide region on tiny key element zone, thus in the distribution of even etc. the output characteristics value of the brightness irregularities of revising the vibration formula, irregular colour effectively.
Preferred in the present invention output characteristics value is the brightness output valve or the color output valve of above-mentioned image forming apparatus.
According to the present invention, to become the brightness irregularities, irregular colour of problem easily as image display device even because can revise, so can make the modified value of the deviation that can suit to revise these image-display units of finding out easily.
The modified value of image display device of the present invention is made program and is characterised in that, makes computing machine carry out the modified value method for making of above-mentioned image display device, and recording medium of the present invention is characterised in that, records this modified value and makes program.
According to these inventions, can only make suitable modified value by being installed on the above-mentioned modified value method for making of general calculation machine enforcement.
■ 2. utilizes the extreme value of the distribution of output characteristics value to make the method for modified value
Image display device of the present invention possesses: with the output characteristics value of the paired image forming apparatus of the screen of display image on have the image-display units of distribution; According to the picture signal of the corresponding modified value correction of the distribution of above-mentioned output characteristics value input after output to the amending unit of above-mentioned image-display units, it is characterized in that,
Above-mentioned amending unit possesses:
Very big or the minimum extreme value that becomes the output characteristics value of the distribution that is presented at the output characteristics value in image on the screen is set as node, according to the node of setting the image segmentation that is presented on the above-mentioned screen is become a plurality of key elements zone, according to the modified value storage part of each key element area stores modified value of cutting apart;
According to the modified value that is stored in above-mentioned modified value storage part, carry out the correcting process portion of correction of the picture signal of above-mentioned input according to above-mentioned each key element zone.
According to the present invention, by the extreme value of the distribution of output characteristics value is set and is divided into a plurality of key elements zone as node, can correspondingly revise with the distribution of the output characteristics that is presented at the image on the screen, can revise the distribution of output characteristics value accurately.Thereby, can enough modified values of also lacking than method in the past carry out high-precision correction, do not need the storer of storage modified value etc. is arranged to the image display device that high capacity just can be arranged to show high quality image.
Preferred in the present invention modified value storage part possesses the node location information of the position in the screen that stores each key element zone of expression and the key element area stores table of the corrected parameter in the key element zone determined with node location information and the modified value storage list of storage and the corresponding modified value of corrected parameter.
According to the present invention, because relevant with key element information and the actual modified value of revising are stored in separately the table, so can reduce the data volume relevant with modified value.
Preferred in the present invention storage and the corresponding a plurality of modified values of different gray level images in the modified value storage part.
According to the present invention, because by the corresponding a plurality of modified values such as γ characteristic of storage with image-display units, the correction that can correspondingly suit with the gray scale of the image that shows with image-display units is so can be arranged to show the more image display device of high quality image.
Preferred in the present invention output characteristics value is the brightness output valve or the color output valve of above-mentioned image forming apparatus.
According to the present invention, to become the brightness irregularities, irregular colour of problem easily as image display device even because can revise, so the deviation of these image-display units of seeing easily by suitable correction can be arranged to provide the image display device of high quality image.
The modified value method for making of image display device of the present invention is made the modified value in the amending unit that is stored in above-mentioned image display device.Specifically, the modified value method for making of image display device of the present invention is made the above-mentioned modified value of image display device, above-mentioned image display device possesses: with the output characteristics value of the paired image forming apparatus of the screen of display image in have distribution image-display units and according to the picture signal of the corresponding modified value correction input of the distribution of above-mentioned output characteristics value after output to the amending unit of above-mentioned image-display units, it is characterized in that, comprising:
The distribution of distribution that detection is presented at the output characteristics of the image on the above-mentioned screen detects step;
According to the distribution of detected output characteristics, set the extreme value of the very big or minimum extreme value of the distribution that becomes the output characteristics value and set step;
The extreme value of setting as node, is set step to the segmented element that is divided into a plurality of key elements zone in the image that is presented on the above-mentioned screen;
Set the modified value of modified value according to each the key element zone that is partitioned into and set step.
At this, modified value manufactured according to the present invention can be used for fixing the image correction of the image display device of pixel type aptly, for example, except OLED display, LCD, plasma display, go for forming from the light beam of light source ejaculation the projector of optical image and enlarging projection according to the image information modulation.
In addition, in extreme value is set step, for example import when allowing the picture signal that whole pixels show with same brightness value, with specific luminance is the highest mutually on every side location of pixels, and the location of pixels that the phase specific luminance is minimum on every side set as extreme value.
And then, as the method that the key element of carrying out based on segmented element setting step is cut apart, for example can use the De Laonei triangle split plot design of in the modeling of spatial data, using.
According to the present invention, because can enough required MIN data volumes make modified value in the amending unit that is stored in image display device, so need in image display device, not use the storage unit of jumbo storer etc.In addition, because revise according to the node of the extreme value that is set at the output characteristics value, thus can be presented at the correction of the image on the screen according to the distribution of output characteristics value, thus carry out the high precision correction.
Preferably possess in the present invention after the step of setting modified value, obtain with distribution after the correction of the distribution of the output characteristics of the image of the modified value correction of making and obtain step, with the judgement of carrying out the quality of correction image according to the distribution of revised output characteristics, if be judged to be badly, then implement extreme value once more and set step is set step to modified value correction image evaluation procedure.
According to the present invention, though with only carry out making of 1 modified value and compare data volume and increase, but because by setting more careful modified value, can increase substantially image quality, so with the data volume increase correspondingly, can access the modified value that can show the image more much higher than modification method quality in the past.
Preferably set in the step in the present invention, set in the extreme value of setting in the step in previous extreme value and append new extreme value in the extreme value of implementing once more.
According to the present invention, because except the extreme value of when initial modified value generates, setting, new extreme value is appended as node and set segmented element, so the precision of newly-generated correction data is compared certain raising with previous correction data.
Preferred in the present invention output characteristics value is the brightness output valve or the color output valve of above-mentioned image forming apparatus.
According to the present invention, to become the brightness irregularities, irregular colour of problem easily as image display device even because can revise, so can make the modified value of the deviation that can suit to revise these image display devices of seeing easily.
The modified value of image display device of the present invention is made program and is characterised in that, allows computing machine carry out the modified value method for making of above-mentioned image display device, and recording medium of the present invention is characterised in that, records modified value and makes program.
According to these inventions,, just can make suitable modified value as long as then be installed in the general calculation machine and implement above-mentioned modified value method for making.
Description of drawings
Fig. 1 is the mode chart that the correction data of expression embodiments of the present invention are made the formation of device.
Fig. 2 is the mode chart that the brightness irregularities of the brightness irregularities detecting unit of the above-mentioned embodiment of expression detects.
Fig. 3 is the process flow diagram of effect of the brightness irregularities detecting unit of the above-mentioned embodiment of expression.
Fig. 4 is the mode chart that is used to illustrate that the equipotential line of above-mentioned embodiment is set at interval.
Fig. 5 is the process flow diagram of the equipotential line establishing method at interval of the above-mentioned embodiment of expression.
Fig. 6 is the mode chart that is used to illustrate that the equipotential line of above-mentioned embodiment is set at interval.
Fig. 7 is the mode chart that is used to illustrate that the equipotential line of above-mentioned embodiment is set at interval.
Fig. 8 is the equipotential line equipotential line at interval set of the storage of the above-mentioned embodiment of the expression mode chart of the data structure of storage part at interval.
Fig. 9 is the process flow diagram of the order set of the equipotential line of the above-mentioned embodiment of expression.
Figure 10 is the mode chart of data structure of equipotential line storage part of the equipotential line that stores setting of the above-mentioned embodiment of expression.
Figure 11 is the process flow diagram that is used for setting according to the equipotential line explanation of the setting of above-mentioned embodiment the method for typical value.
Figure 12 is the mode chart of method that is used to illustrate the setting typical value of above-mentioned embodiment.
Figure 13 is the process flow diagram of the step of setting based on the polygon key element Region Segmentation of polygon cutting unit and modified value of the above-mentioned embodiment of expression.
Figure 14 is the mode chart that is used to illustrate the method that the polygon key element Region Segmentation and the modified value based on the polygon cutting unit of above-mentioned embodiment are set.
Figure 15 is the process flow diagram based on the order of the polygon key element Region Segmentation of polygon cutting unit of the above-mentioned embodiment of expression.
Figure 16 is the mode chart based on the method for the polygon key element Region Segmentation of polygon cutting unit that is used to illustrate above-mentioned embodiment.
Figure 17 is the mode chart that is used to illustrate the modified value of making of above-mentioned embodiment.
Figure 18 is the mode chart of data structure of the modified value of making of the above-mentioned embodiment of expression.
Figure 19 is the mode chart of data structure of the modified value of making of the above-mentioned embodiment of expression.
Figure 20 is that the correction data of the above-mentioned embodiment of explanation are made the process flow diagram of the effect of device.
Figure 21 is the mode chart that possesses the image processing circuit of the projector of revising data storage cell, revises the data storage cell storage and makes the modified value that device is made by the correction data of above-mentioned embodiment.
Figure 22 is the mode chart of formation of the correction numeral system apparatus for converting of expression embodiments of the present invention.
Figure 23 is the mode chart that the brightness irregularities based on the brightness irregularities detecting unit of the above-mentioned embodiment of expression detects.
Figure 24 is the process flow diagram of effect of the brightness irregularities detecting unit of the above-mentioned embodiment of expression.
Figure 25 is the mode chart that the brightness irregularities extreme value based on brightness irregularities extreme value setup unit of the above-mentioned embodiment of expression is set.
Figure 26 is the process flow diagram of effect of the brightness irregularities extreme value setup unit of the above-mentioned embodiment of expression.
Figure 27 is the mode chart that is used to illustrate the method that the brightness irregularities extreme value of above-mentioned embodiment is set.
Figure 28 is the process flow diagram of the order of expression brightness irregularities extreme value setting.
Figure 29 is the process flow diagram based on the order of the polygon key element Region Segmentation of polygon cutting unit of the above-mentioned embodiment of expression.
Figure 30 is the mode chart based on the method for the polygon key element Region Segmentation of polygon cutting unit that is used to illustrate above-mentioned embodiment.
Figure 31 is the mode chart that is used to illustrate the modified value of making of above-mentioned embodiment.
Figure 32 is the mode chart of data structure of the modified value of making of the above-mentioned embodiment of expression.
Figure 33 is the mode chart of data structure of the modified value of making of the above-mentioned embodiment of expression.
Figure 34 is that the quality based on the correction image of revising the data judging unit of the above-mentioned embodiment of expression is judged the process flow diagram of estimating flow process.
Figure 35 is used to illustrate that the extreme value of carrying out once more after the quality judgement based on correction data judging unit of above-mentioned embodiment is set and the mode chart of polygon key element Region Segmentation.
Figure 36 is used to illustrate that the extreme value of carrying out once more after the quality judgement based on correction data judging unit of above-mentioned embodiment is set and the curve map of polygon key element Region Segmentation.
Figure 37 is used to illustrate that the extreme value of carrying out once more after the quality judgement based on correction data judging unit of above-mentioned embodiment is set and the mode chart of polygon key element Region Segmentation.
Figure 38 is used to illustrate that the extreme value of carrying out once more after the quality judgement based on correction data judging unit of above-mentioned embodiment is set and the curve map of polygon key element Region Segmentation.
Figure 39 is that the correction data of the above-mentioned embodiment of explanation are made the process flow diagram of the effect of device.
Figure 40 is that possessing of above-mentioned embodiment stores by revising data and make the mode chart of image processing circuit of projector of the correction data storage cell of the modified value that device makes.
Symbol description
Make device 1... revise data, 100... projector, 101... correction data storage cell, 103... conversion process portion, 411... brightness irregularities detecting unit, 412... equipotential line setup unit, 413... typical value setup unit, 414... correction data generating unit, 415... polygon cutting unit, 416... nodal value setup unit, 417... key element value setup unit, S3, S21... the step that distribute to detect, S7, S22... equipotential line is set step at interval, S8, S23... equipotential line is set step, S14, S26... segmented element is set step, S15, S20, S27, S28... modified value is set step, S18, S25... node is set step, B1... revise data and make device, B411... brightness irregularities detecting unit, B412... brightness irregularities extreme value setup unit, B413... polygon cutting unit, B414... nodal value setup unit, B415... key element value setup unit, B416... revise the data judging unit, BS3, BS15... detecting unit distributes, BS6, BS16... extreme value is set step, BS8, BS17... segmented element is set step, BS12, BS20... revise the back distribution and obtain step, BS13, BS14, BS21... correction image evaluation procedure, BS9, BS18, BS19... modified value is set step
Embodiment
Below, one embodiment of the present invention are described with reference to the accompanying drawings.
[embodiment 1]
■ 1. revises the formation that data are made device 1
(1) the whole formation of device
Fig. 1 represents that the correction data of the projector of embodiments of the present invention 1 make the mode chart of device 1, these correction data are made device 1 and are possessed screen 2, CCD camera 3, and computing machine 4, be to make to revise to revise the device of correction data of brightness irregularities of distribution of output characteristics value of projected image that data are made the projector 100 of object as becoming.
Screen 2 is that projection becomes and revises the part of projected image that data are made the projector 100 of object, CCD camera 3 has the function that is projected in the camera head of the projected image on the screen 2 as shooting, and the image transformation of making a video recording with this CCD camera 3 is that electric signal outputs to computing machine 4.
Computing machine 4 is the images that read in 3 shootings of CCD camera, carries out the correction section data that Flame Image Process generates projector 100.
The correction data storage that generates in this computing machine 4 is being arranged in the correction data storage cell 101 of the storer in the projector 100 etc., with projector's 100 projected images the time, with the correction data that are stored in this correction data storage cell 101 picture signal is revised the back projected image, detailed content illustrates later on.
Computing machine 4 possesses CPU41 and memory storage 42, with the image-related converting electrical signal of taking with CCD camera 3 be that Digital Image Data is handled in CPU41.
CPU41 possesses as the brightness irregularities detecting unit 411 of the program of launching on the zoning, equipotential line setup unit 412, typical value setup unit 413 and revises data generating unit 414, in memory storage 42 in order to preserve these detected values, setting value etc., on the part of storage area, guarantee to have brightness irregularities distributed store portion 421, equipotential line storage part 422, equipotential line storage part 423 at interval, and typical value storage part 424.
(2) formation of the functional element in the CPU41
(2-1) formation of brightness irregularities detecting unit 411
Brightness irregularities detecting unit 411 is that the output according to the CCD camera 3 of the projected image that has gone out from projector's 100 projections from having made a video recording comes the uneven part of sensed luminance, specifically, and the processing of execution graph 2 and Fig. 3.
At first, brightness irregularities detecting unit 411 is input to the brightness irregularities detection to become with projecting image data TP revises the projector 100 that data are made object, handle and this view data respective projection image projection (treatment S 1) on the projecting plane of screen 2 from projector 100.And the brightness irregularities of this moment detects the monochrome image that is shown as certain gray scale with projecting image data TP.
Then, brightness irregularities detecting unit 411 is used as the CCD camera 3 of camera head and takes the projected image that is projected on the projecting plane, and data for projection A1 is taken into (treatment S 2) as numerical data.
At last, carry out Flame Image Process and make that precision reflects brightness irregularities in data for projection A1, obtain the brightness irregularities distribution A2 of the distribution that becomes the output characteristics value, in brightness irregularities distributed store portion 421, store data (treatment S 3: distribute and detect step).
(2-2) formation of equipotential line setup unit 412
Equipotential line setup unit 412 is according to the brightness irregularities distribution A2 that obtains, set the interval of the equal equipotential line of brightness irregularities,, on brightness irregularities distribution A2, set the part of equipotential line according to the interval of the equipotential line of setting, specifically, the processing of execution graph 4 and Fig. 5.
At first, equipotential line setup unit 412 is obtained the brightness irregularities distribution A2 (treatment S 4) that is stored in the brightness irregularities distributed store portion 421.
Then, equipotential line setup unit 412 is obtained the maximal value and the minimum value (treatment S 5) of brightness irregularities from the brightness irregularities distribution A2 that obtains.
And then equipotential line setup unit 412 is obtained the histogram A3 (treatment S 6) of brightness irregularities from brightness irregularities distribution A2.
Equipotential line setup unit 412 is set the interval (treatment S 7: equipotential line is set step at interval) of equipotential line according to the histogram A3 that obtains.
For example, when obtaining brightness irregularities distributed image A4 shown in Figure 6, it is under the situation of state such shown in the histogram A5 that this brightness irregularities distributes, with E 〉=160,140≤E＜160, equally spaced get under the situation at interval of equipotential line 120≤E＜140, the mode of E＜120, and brightness irregularities distributed image A4 classifies as image A 6.On the other hand, when with E 〉=160,150≤E＜160,130≤E＜150, get under the situation at interval of equipotential line, brightness irregularities distributed image A4 classifies as image A 7 the mode unequal interval of E＜130.Which kind of that is, can set arbitrarily based on the setting at interval of the equipotential line of equipotential line setup unit 412 according to carrying out correction.
If further describe, then for example as shown in Figure 7, under the situation of the brightness irregularities distributed image A9 that obtains the brightness irregularities distribution that has as histogram A8, equipotential line setup unit 412 can freely be set at the equipotential line B of the such unequal interval of the such equally spaced equipotential line A of image A 10, image A 11 according to the characteristic of revising data, and the equipotential line C of the such unequal interval of image A 12.
Equipotential line A is the simplest equipotential line establishing method of uniformly-spaced setting at interval, when setting at interval, has the advantage that does not need to carry out particular processing.
Equipotential line B makes the equipotential line establishing method at interval that narrows down at interval around the maximal value that brightness irregularities distributes, narrow down at interval in the equipotential line of the substantial middle part of brightness irregularities distributed image A9.According to such establishing method, can set and can revise eye-catching especially uneven correction data meticulously, effective in uneven correction with peak value.
Equipotential line C makes the equipotential line establishing method at interval that narrows down at interval near the peak value of the histogram A8 of brightness irregularities distributed image A9, narrow down at the first-class bit line spacer of peripheral part of brightness irregularities distributed image A9.According to such establishing method, can set the correction data of the brightness irregularities that can revise the zone that is diffused in wide region meticulously, effective in the uneven correction of vibration shape.
Each equipotential line of setting like this at interval as shown in Figure 8, as sequence number, brightness irregularities minimum value and brightness irregularities maximal value are stored in equipotential line at interval in the storage part 423 as the table T1 of 1 record at interval equipotential line.
Return Fig. 5, if equipotential line setting at interval finishes, then equipotential line setup unit 412 carries out the setting (treatment S 8: equipotential line is set step) of equipotential line at interval according to brightness irregularities distribution A2, the equipotential line set.
The setting of this equipotential line is specifically carried out according to the order shown in the process flow diagram of Fig. 9.
At first, equipotential line setup unit 412 reads in brightness irregularities distribution A2 (treatment S 81), then carries out read in (treatment S 82) of equipotential line interval T 1.
Then, equipotential line setup unit 412 calculates with equipotential line interval sequence number and has replaced the brightness irregularities distribution (treatment S 83) that brightness irregularities distributes.That is, exactly above-mentioned brightness irregularities distributed image A4 shown in Figure 6 is replaced into the such image of image A 6 and image A 7.
At last, equipotential line setup unit 412 uses the boundary line tracing to calculate equipotential line (treatment S 84).Can adopt 4 to link one of boundary line tracing, 8 binding boundary line tracings as the boundary line tracing.
The whole equipotential line that calculates as shown in figure 10, as equipotential line sequence number, brightness irregularities value, count in the border and the positional information of frontier point is stored in the equipotential line storage part 422 as the table T2 of 1 record.
(2-3) formation of typical value setup unit 413
Typical value setup unit 413 is the data according to the equipotential line of setting in equipotential line setup unit 412, sets the part of the typical value of the brightness correction parameter of revising brightness irregularities, specifically, carries out the processing of Figure 11 and Figure 12.
At first typical value setup unit 413 reads in the data (treatment S 9) of equipotential line from equipotential line storage part 422, as the data of equipotential line, for example can enumerate equipotential line sequence number, brightness irregularities value, count in the border and the positional information of frontier point etc.
Then, typical value setup unit 413 carries out read in (treatment S 10) of the pre-prepd brightness irregularities that the even brightness irregularities corrected parameter of brightness disproportionation is mapped-brightness irregularities corrected parameter relation table.This brightness irregularities-brightness irregularities corrected parameter relation table is the table that brightness irregularities E and corrected parameter V are mapped as the curve map A13 of Figure 12, and it is big more to have a brightness irregularities E, the big more relation of correction that is produced by corrected parameter.
At last, typical value setup unit 413 is according to the data and the brightness irregularities-brightness irregularities corrected parameter relation table of equipotential line, with the brightness correction parameter of corresponding each equipotential line of value of the brightness irregularities of each equipotential line or the parameter that is used to calculate the brightness correction parameter set (treatment S 11) as typical value.This typical value for example constitutes equipotential line sequence number and the brightness correction parameter value that comprises brightness correction parameter sequence number, correspondence, and the typical value of setting is stored in the typical value storage part 424.
(2-4) formation of correction data generating unit 414
Revising data generating unit 414 is the correction section data that become modified value according to the equipotential line of setting with equipotential line setup unit 412, as shown in Figure 1, constitute possess polygon cutting unit 415, nodal value setup unit 416 and key element value setup unit 417, these each unit are carried out Figure 13 and processing shown in Figure 14 particularly.
At first, polygon cutting unit 415 is obtained the such equipotential line of regional A14 (treatment S 12) as shown in Figure 14 from equipotential line storage part 422.
If equipotential line obtain end, then polygon cutting unit 415 is set in the closed region based on equipotential line shown in the regional A15 (treatment S 13).
If the setting of these closed regions finishes, then being divided into a plurality of polygon key elements zone (treatment S 14: segmented element is set step) in each closed region.
At last, nodal value setup unit 416 and key element value setup unit 417 are according to each polygon key element zone, setting becomes the key element value of brightness correction parameter, perhaps becomes the nodal value (treatment S 15: modified value is set step) of the parameter that is used to calculate the brightness correction parameter.
If illustrate in greater detail by polygon cutting unit 415, nodal value setup unit 416, and key element value setup unit 417 carry out these set, then set according to Figure 15 and order shown in Figure 16.
At first, polygon cutting unit 415 is set cutting apart of closed region border several (treatment S 16: node is set step) according to the closed region border L1 based on equipotential line as shown in figure 16.And, in Figure 16, for example, if cutting apart of closed region border several N for example be set at 6, then on the boundary line, can set 6 node P1～P6.
Then, polygon cutting unit 415 count according to the border that constitutes closed region border L1 and the closed region border cut apart the length (treatment S 17) that number comes computation bound line cut-off rule element.
Then, according to the length of closed region border L1 and boundary line cut-off rule element, configuration node on the closed region border (treatment S 18).
Then, polygon cutting unit 415 carries out borderline node P1～P6 of closed region and the processing (treatment S 19) that triangle key element node A～F associated with De Laonei triangle split plot design.
At last, nodal value setup unit 416 is set the node location that is used for according to equipotential line and triangle key element zone and is calculated parameter as the brightness correction parameter of the nodal value in each triangle key element zone, key element value setup unit 417 set the brightness correction parameters as and the corresponding key element value of equipotential line and triangle key element zone (treatment S 20: modified value is set step).
The final data generating unit 414 of revising is stored triangle key element zone, nodal value and the key element value set with these unit as the data of the list structure of setting according to each triangle key element zone.
Specifically, for example as shown in figure 17, on closed region border L1 and closed region border L2, set triangle key element node A～F, between closed region border L1 and closed region border L2, set triangle key element zone 1～4, if set V1 as the key element value, then revise data generating unit 414 generate as shown in Figure 18 table T3 and table T4 as shown in Figure 19.
The table T3 possess with triangle key element zone 1,2,3,4... correspondingly node location information (x A, y A), (x B, y B), (x F, y F) ..., key element value V1, key element nodal value L1, L2 be stored in 1 structure in the record.For example, be endowed that to be arranged to node location information with the triangle key element zone 1 of key element sequence number 1 be (x A, y A), (x B, y B), (x F, y F), key element value V1, the node A on the L1 of closed region border, the key element nodal value of B is that the key element nodal value of L1, the node F on the L2 of closed region border is L2.
At this, on table T3, key element value V1, key element nodal value L1, L2 set as corrected parameter, and concrete correction data storage is in accuracy table T4 shown in Figure 19.
In this accuracy table T4, storage and above-mentioned corresponding concrete correction data such as key element value V1, key element nodal value L1, L2 etc. are carried out on each triangle key element zone based on the correction of revising data according to two table T3, T4.
In addition, key element value V1 is the corrected parameter of revising in the triangle key element zone, and key element nodal value L1, L2 are set to the corrected parameter as node, under the situation that user element value V1 does not revise, by interpolation computational element nodal value L1, L2, can be used as the correction data and use.
■ 2. revises the effect that data are made device 1
Then, possesses the effect that has the correction of each above-mentioned functional unit data to make device 1 according to flowchart text shown in Figure 20.
Brightness irregularities detecting unit 411 detects to the projector's 100 input brightness irregularities that become the correction object and uses projecting image data TP, after taking with CCD camera 3, obtains brightness irregularities distribution (treatment S 21: distribute and detect step) according to data for projection.
Equipotential line setup unit 412 is obtained brightness irregularities from the brightness irregularities that obtains distributes maximal value and minimum value obtain histogram, set the interval (treatment S 22: equipotential line is set step at interval) of equipotential line according to this histogram.
Then, equipotential line setup unit 412 is set equipotential line (treatment S 23: equipotential line is set step) according to the interval of the equipotential line of setting on brightness irregularities distributes.
After equipotential line is set, typical value setup unit 413 is according to the data of the equipotential line of being set by equipotential line setup unit 412, and brightness irregularities-brightness irregularities corrected parameter relation table, setting (treatment S 24) as typical value with the corresponding brightness correction parameter of value of the brightness irregularities of each equipotential line.
After the setting of the typical value of typical value setup unit 413 finishes, revise the polygon cutting unit 415 of data generating unit 414 and on equipotential line, set a plurality of nodes (treatment S 25: node is set step), being divided into a plurality of triangle key elements zone (treatment S 26: segmented element is set step) between the closed region border based on equipotential line.
Then, for each triangle key element zone of cutting apart, nodal value setup unit 416 carries out the setting (treatment S 27: modified value is set step) at the borderline key element nodal value of closed region, and key element value setup unit 417 carries out the setting (treatment S 28: modified value is set step) of the key element value in each triangle key element zone.
Revise data generating unit 414 key element nodal value, the key element value set, be mapped with the key element sequence number in node location information and triangle key element zone, the correction data of regulation gray-scale value write the correction data storage cell 101 (treatment S 29) that becomes the projector 100 of revising object.
Revise data generating unit 414 and judge the correction data (treatment S 30) that whether write whole gray level images, do not write if be judged to be, then change brightness irregularities and detect the gray scale (treatment S 31) of using projecting image data, begin repetition from treatment S 21, if all writing of the correction data of gray scale obtains confirming, then end process.
The formation of ■ 3. projectors 100
Make image processing circuit that device 1 makes the projector 100 of revising data as shown in figure 21 with above-mentioned correction data, constitute possess A/D transducer 102, conversion process portion 103, D/A transducer 104 and liquid crystal display drive circuit 105, handle then to form optical image at liquid crystal indicator with this image processing circuit from the picture signal of RGB terminal 106 inputs.
A/D transducer 102 is digital conversion parts as the picture signal of simulating signal input, outputs to conversion process portion 103 through digitized picture signal.
Possess with above-mentioned correction data as the conversion process portion 103 of correcting process portion and to make the correction data storage cell 101 that device 1 is made.Conversion process portion 103 becomes the mode correction image signal of the brightness value corresponding with picture signal with the picture signal according to this correction data storage cell 101 conversion input.
Revise in the data storage cell 101 at this, store and storing and different gray scale node corresponding positional informations, nodal value, a plurality of correction tables of data 101A of key element value, 101B, 101C..., conversion process portion 103 selects suitable correction tables of data 101A, 101B, 101C... to carry out the correction of picture signal according to the gray scale of the picture signal of input.And then it is that unit carries out that the gray scale of received image signal is judged with the frame, can be to the averaging of brightness value of integral image, or carry out according to the brightness value of the image of area largest portion.
Then, the picture signal of revising with conversion process portion 103 outputs to the D/A transducer 104 of back segment.
D/A transducer 104 is picture signals that analog converting is revised with conversion process portion 13, outputs to the part of liquid crystal display drive circuit 105.
Liquid crystal display drive circuit 105 drives liquid crystal indicator according to the picture signal through revising via 104 inputs of D/A transducer, the projector, image projection of having eliminated brightness irregularities on screen.
According to the projector 100 that possesses such correction data storage cell 101, because by the extreme value of brightness irregularities is revised tables of data 101A, 101B, 101C... as node to each gray scale storage, set the brightness irregularities modified value according to the brightness irregularities that is presented at the image on the screen, so, can high precision correction brightness irregularities, be arranged to provide the projector of high quality images with needed minimal data volume.
[embodiment 2]
■ 1. revises the formation that data are made device B1
(1) device is whole constitutes
Figure 22 represents that the correction data of the projector of embodiment 2 make the mode chart of device B1, these correction data are made device B1 and are possessed screen B2, CCD camera B3 and computing machine B4, be to make to revise the device that data are made the correction data that brightness irregularities that the output characteristics value of perspective view of the B100 of projector of object distributes revises to becoming.
Screen B2 is that projection becomes and revises the part of projected picture that data are made the B100 of projector of object, CCD camera B3 has the function that is projected in the camera head of the projected image on the screen B2 as shooting, and the image transformation of making a video recording with CCD camera B3 is that electric signal outputs to computing machine B4.
Computing machine B4 is taken into the image of taking with CCD camera B3, carries out Flame Image Process, generates the correction section data of the B100 of projector.
Among the correction data storage cell B101 such as the storer of correction data storage in being arranged at the B100 of projector with this computing machine B4 generation, when carrying out the projection of projected image with the B100 of projector, use is stored in the correction data correction picture signal among this correction data storage cell B101, projected image.Detailed content illustrates in the back.
Computing machine B4 possesses calculation processing apparatus B41 and memory storage B42, with CCD camera B3 that photograph with image-related converting electrical signal be that Digital Image Data is handled in calculation processing apparatus B41.
Calculation processing apparatus B41 possesses brightness irregularities detecting unit B411, brightness irregularities extreme value setup unit B412, polygon cutting unit B413, nodal value setup unit B414, the key element value setup unit B415 as the program of launching on the zoning, and correction data judging unit B 416, in memory storage B42,, on the part of storage area, guarantee to have the brightness irregularities distributed store B421 of portion, brightness irregularities extreme value storage part B422 in order to preserve these detected values, setting value etc.
(2) formation of the functional unit in the calculation processing apparatus B41
(2-1) formation of brightness irregularities detecting unit B411
Brightness irregularities detecting unit B411 is according to coming the uneven part of sensed luminance from the output of having taken by the CCD camera B3 of the projected image of the B100 of projector projection, specifically, carrying out the processing of Figure 23 and Figure 24.
At first, brightness irregularities detecting unit B411 is input to the brightness irregularities detection to become with projecting image data BTP and revises the B100 of projector that data are made object, by the B100 of projector handle and this view data respective projection image projection (treatments B S1) on the projecting plane of screen B2.And the brightness irregularities of this moment detects the monochrome image that is shown as certain gray scale with projecting image data BTP.
Then, brightness irregularities detecting unit B411 is used as the CCD camera 3 of filming apparatus and takes the projected image that is projected on the projecting plane, and photographed data BA1 is taken into (treatments B S2) as numerical data.
At last, carrying out Flame Image Process makes critically reflect brightness irregularities on photographed data BA1, obtain the brightness irregularities distribution BA2 of the distribution that becomes the output characteristics value, at the brightness irregularities distributed store B421 of portion storage data (treatments B S3: distribute and detect step).
(2-2) formation of brightness irregularities extreme value setup unit B412
Brightness irregularities extreme value setup unit B412 distributes according to acquired brightness irregularities to set the part of brightness irregularities extreme value, specifically, carries out the processing of Figure 25 and Figure 26.
At first, brightness irregularities extreme value setup unit B412 obtains the brightness irregularities distribution BA2 (treatments B S4) that is stored in the brightness irregularities distributed store B421 of portion.
If obtained brightness irregularities distribution BA2, then brightness irregularities extreme value setup unit B412 calculates among the brightness irregularities distribution BA2 brightness value than near the also high or also low part (treatments B S5) of brightness value around.Specifically, shown in the BA3 of Figure 25, like that,, then as table BA32, calculate extreme value sequence number, the position of extreme value, the extreme value of each point if judge the brightness irregularities extreme value as image B A31.
At this, the judgement of brightness irregularities extreme value can realize by the processing of carrying out Figure 27 and Figure 28.
At first, as shown in figure 27, brightness irregularities extreme value setup unit B412 is cut apart setting a plurality of extremum search scope BA51, BA52... (treatments B S51) in the brightness irregularities distribution BA5 that obtains.
Then, brightness irregularities extreme value setup unit B412 uses the brightness irregularities distribution (treatments B S52) in the biquadratic function interpolation hunting zone in each hunting zone BA51, BA52....
Brightness irregularities extreme value setup unit B412 by the biquadratic function BA61 that the brightness irregularities in the approximate a certain hunting zone BA5N distributes, calculates the extreme value (position of the slope of approximate function=0) (treatments B S53) of approximate function as shown in figure 27.
At last, brightness irregularities extreme value setup unit B412 judges whether extreme value is arranged in the BA5N of hunting zone, if just have it is set (treatments B S54) as extreme value.
Return Figure 25 and Figure 26, then in the extreme value that obtains, brightness irregularities extreme value setup unit B412 carries out the setting of the extreme value that will use as node, the data storage of the extreme value point group of setting (treatments B S6: extreme value setting step) in brightness irregularities extreme value storage part B422.
The setting of the extreme value that will use as node for example, is undertaken by deleting as required in the deviation of the brightness irregularities of the even extreme value part of brightness disproportionation around like that nearby shown in the BA4 of Figure 25 after a little while.And, as long as preestablish threshold value, surpass this threshold value with whether and judge and get final product in order to delete.For example, in Figure 25, if it is few to be judged to be the deviation of brightness irregularities of extreme value part of the point 3 in image B A41, then by the record of deletion extreme value sequence number 3 in the table BA42 of the position of the extreme value sequence number that calculates, extreme value and extreme value, just can delete will be as the extreme value of node use.
(2-3) formation of polygon cutting unit B413
Polygon cutting unit B413 is the data according to the extreme value point group of setting in brightness irregularities extreme value setup unit B412, is the image segmentation that is presented on the screen the part of extreme value as the polygon key element zone of node, specifically, carry out Figure 29 and processing shown in Figure 30.
At first, polygon cutting unit B413 obtains the brightness irregularities extreme value (treatments B S7) that is stored in brightness irregularities extreme value storage part B422.
Polygon cutting unit B413 is according to the brightness irregularities extreme value that obtains, with the polygon key element zone of the point group of brightness irregularities extreme value, be the image segmentation that is presented on the screen a plurality of key elements zone (treatments B S8: segmented element is set step) as node.
In the cutting apart of key element zone, for example can utilize polygon key element zone as leg-of-mutton De Laonei triangle split plot design.Promptly, as shown in figure 30, from using the detected brightness irregularities distribution of brightness irregularities detecting unit B411 BA2, obtain the point group of the brightness irregularities extreme value as image B A41 by brightness irregularities extreme value setup unit B412, polygon cutting unit B413 carries out key element to this extreme value as node to be cut apart, and image B A41 carries out key element with the such a plurality of triangle key elements of image B A7 to be cut apart.
(2-4) formation of nodal value setup unit B414 and key element value setup unit B415
Nodal value setup unit B414 and key element value setup unit B415 are the parts that generates with the corresponding modified value of cutting apart with polygon cutting unit B413 of triangle key element, for example, as shown in figure 31, if suppose to be divided into 4 triangle key elements 1～4, then nodal value setup unit B414 is for example under the situation of the nodal value that key element 1 is set, set the key element node A of key element 1, the nodal value of B, F, key element value setup unit B415 sets the key element value of the modified value that becomes key element 1.
Specifically, shown in figure 32, these unit generate node location, the nodal value of this moment and the key element area stores table BT1 of key element value that stores the triangle key element according to triangle key element sequence number.
For example, the node location of key element sequence number 1 has been set the XY coordinate time when becoming on the display image of revising object, is (x with key element node 1 A, y A), key element node 2 is (x B, y B), key element node 3 is (x F, y F) form be stored, the key element value as key element V 1The storage, the key element nodal value of key element node 1～3 as L A, L B, L FBe stored in the record that relates to key element sequence number 1.
At this, key element value V 1And key element nodal value L A, L B, L FAll be the brightness irregularities correction data (modified value) of the triangle key element of key element sequence number 1, and in the present example, these values set as corrected parameter that the numeric data that becomes actual modified value is stored among the accuracy table BT2 shown in Figure 33.In this accuracy table BT2, with corrected parameter V 1, L A, L B, L FCorrespondingly storage becomes the numeric data of actual modified value.
And, key element value V 1The brightness irregularities correction data (modified value) that mean the triangle key element zone of giving key element sequence number 1.On the other hand, do not using this key element value V 1Situation under, user element node L A, L B, L F, the modified value in the triangle key element zone of inner key element sequence number 1 is by interpolation computational element node L A, L B, L F, can calculate the brightness irregularities correction data (modified value) of the reality in the triangle key element zone.
(2-5) formation of correction data judging unit B 416
Revise data judging unit B 416 and be according to above-mentioned polygon cutting unit B413, nodal value setup unit B414, and the brightness irregularities correction data of key element value setup unit B415 setting, detection distributes with the brightness irregularities of the correction image of the projected image of the process brightness irregularities correction of the B100 of projector projection, and judge the part that it is good and bad, specifically, carry out processing shown in Figure 34.
At first, as shown in figure 34, revise data judging unit B 416 to brightness irregularities detecting unit B411 output steering order, detect to the B100 of projector output brightness irregularities once more and use projecting image data BTP, carry out being projected on the screen after the brightness irregularities correction with this view data respective projection image by the B100 of projector pair, obtain brightness irregularities distribution (treatments B S10) by brightness irregularities detecting unit B411.
Then, revise data judging unit B 416 and obtain the brightness irregularities correction data (modified value) (treatments B S11) that obtain with above-mentioned each unit, distribute according to the brightness irregularities that in treatments B S10, newly obtains, with brightness irregularities correction data, calculate the revised brightness irregularities distribution of brightness irregularities (treatments B S12: revise the back distribution and obtain step).
Then, revising the revised brightness irregularities of 416 pairs of brightness irregularities of data judging unit B distributes, in brightness irregularities extreme value setup unit B412, carry out the setting of extreme value, the quality of the extreme value after setting is judged (treatments B S13: the correction image evaluation procedure).At this, whether good and bad judgement evaluation can all be included in the pre-set threshold scope by the size of judging the extreme value that the revised brightness irregularities of brightness irregularities distributes is carried out.
The good and bad result who judges, in the time of in being judged to be the scope of including preset threshold in, end process, and under the situation that be judged to be in the scope that is not accommodated in preset threshold, revise in the extreme value setting of data judging unit B 416 when having set brightness irregularities correction data, append the threshold value that setting this time obtains, to polygon cutting unit B413 output steering order, carry out cutting apart based on the key element of polygon cutting unit B413, according to the polygon key element zone that obtains, allow nodal value setup unit B414 and key element value setup unit B415 computational element value and key element nodal value (treatments B S14: the correction image evaluation procedure) once more.
If be described in more detail based on the evaluation of the correction image of such correction data judging unit B 416 then as follows with reference to Figure 35 to Figure 38.
At first, adopt the 1st a succession of processing brightness irregularities correction data generation as shown in figure 35, obtain the such distribution of brightness irregularities distribution BA8 with brightness irregularities detecting unit B411.Distribute according to this and shown in BA9, to set extreme value P11, P12, the P13 of brightness irregularities with brightness irregularities extreme value setup unit B412, be divided into a plurality of triangle key elements zone as BA10 by polygon cutting unit B413.
If the diagram shows with one dimension should be handled, then as shown in figure 36, the brightness irregularities distribution is appreciated that and is expressed as the such curve of curve B G1 that the curve of expressing from understanding becomes the some P11 of extreme value, the extreme value of P12, P13 is set (curve B G2).Then, each extreme value P11, P12, P13 are set (curve B G3) as triangle segmented element area L 1, L2, L3.
Then, based on the generation of the brightness irregularities correction data of a succession of processing of the 2nd time as shown in figure 37, brightness irregularities detecting unit B411 obtains the distribution as brightness irregularities distribution BA11.Distribute according to this, as BA12, set by extreme value P21, P22, the P23... of previous brightness irregularities extreme value setup unit B412 new settings.Cut apart if carry out polygon once more, then shown in BA13, be divided into than the 1st more tiny polygon key element zone according to extreme value P21, P22, the P23... of new settings.
If should handle with above-mentioned the same curve shows with one dimension, then as shown in figure 38, revised brightness irregularities distribution is appreciated that and is expressed as curve B G4.And, the part that the X-axis that distributes with the brightness irregularities of curve B G4 intersects is extreme value P11, P12, the P13 that sets when once revising preceding, in these P11, P12, P13, so do not produce brightness irregularities because undertaken revising by the 1st time correction.The extreme value of carrying out the 2nd time according to this curve B G4 is set, and new some P21, P22, P23 are appended setting (curve B G5) as extreme value.
Then, if carry out in view of the above that polygon is cut apart then shown in curve B G6, be divided into more tiny polygon key element zone, brightness irregularities also diminishes.Thereby, by repeatedly repeating this process, can be on the direction of unlimited disappearance the brightness irregularities convergence in distribution.
■ 2. revises the effect that data are made device B1
Then, be equipped with the correction data of each above-mentioned functional unit to make the mass action of device B1 according to flowchart text shown in Figure 39.
Brightness irregularities detecting unit B411 is to becoming the B100 of the projector input brightness irregularities detection projecting image data BTP that revises object, after taking with CCD camera B3, according to photographed data BA1, obtain brightness irregularities distribution BA2 (treatments B S15: distribute and detect step).
Then, brightness irregularities extreme value setup unit B412 distributes according to the brightness irregularities that obtains, and sets brightness irregularities extreme value (treatments B S16: extreme value is set step).
If the setting of brightness irregularities extreme value finishes, then polygon cutting unit B413 will be the extreme value point group a plurality of key elements zone (treatments B S17: segmented element is set step) as the image segmentation that node is presented on the screen.
Nodal value setup unit B414 carries out the setting (treatments B S18: modified value is set step) of the nodal value in each polygon key element zone, key element value setup unit B415 carries out the setting (treatments B S19: modified value is set step) of the key element value in each polygon key element zone, generates Figure 32 and key element area stores table BT1 and accuracy table BT2 shown in Figure 33.
If modified value make end, then revise data judging unit B 416 and show the correction image of revising according to key element area stores table BT1 and accuracy table BT2, the brightness irregularities of calculating correction image distribute (treatments B S20) by brightness irregularities detecting unit B411.
Revise data judging unit B 416 and allow brightness irregularities extreme value setup unit B412 distribute according to the revised brightness irregularities of brightness irregularities to carry out the setting of extreme value, the extreme value of setting the whether quality in threshold range is judged and is estimated (treatments B S21).
When being judged to be is under the situation outside the threshold range, revise data judging unit B 416 newly adds this on the preceding extreme value of once setting extreme value, carry out cutting apart of key element zone once more, the nodal value in each polygon key element zone of newly cutting apart is set and the key element value is set, and repeats before correction image arrives threshold value.
On the other hand, under the situation in the scope that is judged to be in threshold value, revise data judging unit B 416 key element area stores table BT1 that generates and accuracy table BT2 are write the correction data storage cell B101 (treatments B S22) that becomes the B100 of projector that revises object.
If to revising the end that writes of data storage cell B101, then revise data judging unit B 416 and judge the modified value (treatments B S23) of whether making different gray level images.Under the situation of the modified value of making different gray level images, change detects the gray scale (treatments B S24) with projecting image data, according to new gray level image, and the making of beginning modified value, the making of modified value of repeating necessary gray level image number.
The formation of ■ 3. B100 of projector
Make image processing circuit that device B1 makes the B100 of projector that revises data as shown in figure 40 with above-mentioned correction data, constitute possess A/D transducer B102, conversion process circuit B103, D/A transducer B104 and liquid crystal indicator driving circuit B105, handle then to form optical image at liquid crystal indicator with this image processing circuit from the picture signal of RGB terminal 106 inputs.
A/D transducer B102 is the part of digital conversion as the picture signal of simulating signal input, outputs to the B103 of conversion process portion through digitized picture signal.
Possess with above-mentioned correction data as the B103 of conversion process portion of correcting process portion and to make the correction data storage cell B101 that device B1 makes.The B103 of conversion process portion revises the picture signal of data storage cell B101 conversion input according to this, to become the mode correction image signal of the brightness value corresponding with picture signal.
Revise among the data storage cell B101 at this, storing and store and different gray scale node corresponding positional informations, nodal value, a plurality of correction tables of data B101A of key element value, B101B, B101C..., the gray scale of the picture signal of B103 of conversion process portion and input correspondingly selects suitable correction tables of data B101A, B101B, B101C... to carry out the correction of picture signal.And it is that unit carries out that the gray scale of received image signal is judged with the frame, can be to the averaging of brightness value of picture integral body, carry out according to the brightness value of the image of area largest portion.
Then, the picture signal of having been undertaken revising by the B103 of conversion process portion outputs to the D/A transducer B104 of back segment.
D/A transducer B104 is that analog converting has carried out picture signal of revising and the part that outputs to liquid crystal display drive circuit B105 by the B103 of conversion process portion.
Liquid crystal display drive circuit B105 according to via having passed through of D/A transducer B104 input the picture signal of revising, drive liquid crystal indicator, the projector, image projection of having eliminated brightness irregularities on screen.
According to the B100 of projector that is equipped with such correction data storage cell B101, because by the extreme value of brightness irregularities is revised tables of data B101A, B101B, B101C... as node at each gray scale storage, correspondingly set the brightness irregularities modified value with the brightness irregularities that is presented at the image on the screen, revise brightness irregularities accurately, so can be arranged to provide the projector of high quality images with the minimal data volume of necessity.
[distortion of embodiment]
And the present invention is not limited to above-mentioned embodiment, and the distortion in the scope that can realize purpose of the present invention, improvement etc. comprise in the present invention certainly.
In above-mentioned embodiment 1, the brightness irregularities of the image on the screen of correction tables of data 101A, 101B, 101C... be presented at to(for) correction have used the present invention, but the present invention is not limited to this.Promptly, carrying out under the even situation about revising of irregular colour, also can be suitable for the present invention and make the correction data, it is stored in the correction data storage cell of projector, and then, can also all be stored in brightness irregularities data and the even correction of irregular colour data both sides in advance in the projector, be arranged to revise simultaneously brightness irregularities and the even projector of irregular colour.
In addition, in above-mentioned embodiment 1,, made correction tables of data 101A, 101B, 101C..., but the present invention is not limited to this in order to revise the projected image of projector 100.That is, also can in existing display device such as the image of the emissive type of slim liquid crystal indicator, PDP, OLED display etc., be suitable for the present invention.
And then in above-mentioned embodiment 2, the correction data that are presented at the brightness irregularities of the image on the screen for correction are made table B101A, B101B, B101C... has been suitable for the present invention, but the present invention is not limited to this.Promptly, carrying out under the even situation about revising of irregular colour, also can be suitable for the present invention and make the correction data, it is stored in the correction data storage cell of projector in advance, and then, can also all be stored in brightness irregularities correction data and the even correction of irregular colour data both sides in advance in the projector, be arranged to revise simultaneously brightness irregularities and the even projector of irregular colour.
In addition, in above-mentioned embodiment 2,, made correction tables of data B101A, B101B, B101C..., but the present invention is not limited to this in order to revise the projected image of the B100 of projector.That is, also go for the image display device of the emissive type of slim liquid crystal indicator, PDP, OLED display etc.
Other, concrete structure and the structure that in the scope that can realize the object of the invention can be arranged to other such as shape of the present invention when implementing.
The present invention can perform well in the image display device of PDP, OLED display etc. except being applicable to projector.

Claims (21)

1. the modified value method for making of an image display device, its make possess with the output characteristics value of the paired image forming apparatus of the screen of display image in the above-mentioned modified value that the image-display units of distribution arranged and use the image display device of the amending unit that outputs to above-mentioned image-display units after with the corresponding modified value of the distribution of above-mentioned output characteristics value the picture signal of input being revised, it is characterized in that, comprising:
Detection is presented at the step of distribution of the output characteristics value of the image on the above-mentioned screen;
Distribute according to detected output characteristics, in this output characteristics distributes, set the step of node;
The node of having set connected to each other becomes above-mentioned image segmentation the step in a plurality of key elements zone; And
Each key element zone of cutting apart is set the step of modified value.
2. the modified value method for making of image display device according to claim 1 is characterized in that:
The step of setting above-mentioned node comprises:
According to the distribution of detected output characteristics value, set the equipotential line at interval of the equipotential line of the pixel linked output characteristics value about equally and set step at interval;
According to the equipotential line of setting at interval, the equipotential line of setting many equipotential lines is set step;
On each equipotential line of setting, set the node of a plurality of nodes and set step; And
According to the node of setting, the segmented element that is divided into a plurality of key elements zone in the image that is presented on the above-mentioned screen is set step.
3. the modified value method for making of image display device according to claim 2 is characterized in that,
Above-mentioned equipotential line is set step at interval and is comprised:
According to the distribution of detected output characteristics value, obtain and detect the output characteristics value differs part farthest from the former output characteristics value that should show step; And
Near the test section of obtaining equipotential line is set narrowlyer than other parts step at interval.
4. the modified value method for making of image display device according to claim 3 is characterized in that,
Above-mentioned equipotential line is set step at interval and is comprised:
Distribution generation and the corresponding histogrammic step of output characteristics value according to detected output characteristics value; And
Near the histogrammic peak value that generates equipotential line is set narrowly step at interval.
5. according to the modified value method for making of any described image display device of claim 2 to 4, it is characterized in that:
Brightness output valve that above-mentioned output characteristics value is above-mentioned image forming apparatus or color output valve.
6. image display device, possess with the output characteristics value of the paired image forming apparatus of the screen of display image in the image-display units of distribution is arranged and uses the amending unit that outputs to above-mentioned image-display units after with the corresponding modified value of the distribution of above-mentioned output characteristics value the picture signal of input being revised, it is characterized in that
Above-mentioned amending unit possesses:
Correspondingly set a plurality of output characteristics value equipotential lines that are presented at the pixel in the image on the above-mentioned screen about equally that linked with the distribution of output characteristics value, according to a plurality of nodes that are set on each equipotential line the image segmentation that is presented on the above-mentioned screen is become a plurality of key elements zone, according to the modified value storage part of each key element area stores modified value of cutting apart; And
With the modified value that is stored in above-mentioned modified value storage part, the correcting process portion of the picture signal of above-mentioned input being revised according to above-mentioned each key element zone.
7. image display device according to claim 6 is characterized in that:
Above-mentioned key element zone is that straight line links the node on the equipotential line and the key element zone of the polygon that does not overlap mutually that makes;
Above-mentioned modified value storage part possesses:
The key element area stores table of the corrected parameter in the key element zone that stores the node location information of the position in the screen in each key element zone of expression and determine with node location information; And
Store accuracy table with the corresponding modified value of above-mentioned corrected parameter.
8. according to claim 6 or 7 described image display devices, it is characterized in that:
In above-mentioned modified value storage part, store and the corresponding a plurality of modified values of different gray level images.
9. according to any described image display device of claim 6 to 8, it is characterized in that: brightness output valve that above-mentioned output characteristics value is above-mentioned image forming apparatus or color output valve.
10. the modified value of an image display device is made program, make computing machine make the above-mentioned modified value of image display device, above-mentioned image display device possess with the output characteristics value of the paired image forming apparatus of the screen of display image in the image-display units of distribution arranged and, it is characterized in that according to the amending unit that outputs to above-mentioned image-display units after with the corresponding modified value of the distribution of above-mentioned output characteristics value the picture signal of input being revised:
Make aforementioned calculation machine enforcement of rights require 2 any described modified value method for making to claim 5.
11. a computer-readable recording medium is characterized in that: record the described modified value of claim 10 and make program.
12. the modified value method for making of image display device according to claim 1 is characterized in that,
The step of setting above-mentioned node comprises:
According to the distribution of the output characteristics that detects, set the extreme value of the very big or minimum extreme value of the distribution that becomes the output characteristics value and set step; And
The extreme value of setting as node, is set step to the segmented element that is divided into a plurality of key elements zone in the image that is presented on the above-mentioned screen.
13. the modified value method for making of image display device according to claim 12 is characterized in that, comprising:
After setting the step of above-mentioned modified value, obtain carried out the correction of distribution of output characteristics of image of correction with Manufactured modified value after distribution obtain step; And
Carry out the quality of correction image according to the distribution of revised output characteristics and judge,, then implement above-mentioned extreme value once more and set step is set step to above-mentioned modified value correction image evaluation procedure if be judged to be badly.
14. the modified value method for making of image display device according to claim 13 is characterized in that:
Set in the step in the extreme value of implementing once more, in the extreme value of setting the step setting by previous extreme value, append new extreme value.
15., it is characterized in that according to the modified value method for making of claim 12 to any described image display device of claim 14:
Brightness output valve that above-mentioned output characteristics value is above-mentioned image forming apparatus or color output valve.
16. image display device, possess with the output characteristics value of the paired image forming apparatus of the screen of display image in the image-display units of distribution is arranged and uses the amending unit that outputs to above-mentioned image-display units after with the corresponding modified value of the distribution of above-mentioned output characteristics value the picture signal of input being revised, it is characterized in that
Above-mentioned amending unit possesses:
Very big or the minimum extreme value that becomes the output characteristics value of the distribution that is presented at the output characteristics value in image on the above-mentioned screen is set as node, according to the node of setting the image segmentation that is presented on the above-mentioned screen is become a plurality of key elements zone, according to the modified value storage part of each key element area stores modified value of cutting apart; And
According to the modified value that is stored in above-mentioned modified value storage part, carry out the correcting process portion of correction of the picture signal of above-mentioned input according to above-mentioned each key element zone.
17. image display device according to claim 16 is characterized in that,
Above-mentioned modified value storage part possesses:
The key element area stores table of the corrected parameter in the key element zone that stores the node location information of the position in the screen in each key element zone of expression and determine with node location information; And
Store accuracy table with the corresponding modified value of above-mentioned corrected parameter.
18., it is characterized in that according to claim 16 or 17 described image display devices:
Storage and the corresponding a plurality of modified values of different gray level images in above-mentioned modified value storage part.
19. any described image display device according to claim 16 to 18 is characterized in that:
Brightness output valve that above-mentioned output characteristics value is above-mentioned image forming apparatus or color output valve.
20. the modified value of an image display device is made program, make computing machine make the above-mentioned modified value of image display device, above-mentioned image display device possess with the output characteristics value of the paired image forming apparatus of the screen of display image in the image-display units of distribution is arranged and uses the amending unit that outputs to above-mentioned image-display units after with the corresponding modified value of the distribution of above-mentioned output characteristics value the picture signal of input being revised, it is characterized in that:
Make any described modified value method for making of aforementioned calculation machine operation claim 12 to claim 15.
21. a computer-readable recording medium is characterized in that: record the described modified value of claim 20 and make program.
CNB200610008050XA 2005-02-23 2006-02-23 Image display device, method of generating correction value of image display device, program for generating correction value of image display device, and recording medium recording program thereon Expired - Fee Related CN100444627C (en)

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