CN1694506A - Clamp level adjusting apparatus, electronic camera, image processing apparatus - Google Patents
Clamp level adjusting apparatus, electronic camera, image processing apparatus Download PDFInfo
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- CN1694506A CN1694506A CNA2005100667092A CN200510066709A CN1694506A CN 1694506 A CN1694506 A CN 1694506A CN A2005100667092 A CNA2005100667092 A CN A2005100667092A CN 200510066709 A CN200510066709 A CN 200510066709A CN 1694506 A CN1694506 A CN 1694506A
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Abstract
A clamp level adjusting apparatus of the invention includes: an image pickup device which has an effective pixel area for producing an image signal and a lightproof area formed around the effective pixel area to produce a black level standard signal; a clamp level calculating section for extracting the black level standard signal from an extracting range of a plurality of horizontal rows in the lightproof area and for producing a clamp level value corresponding to each horizontal row in the effective pixel area based on a vertical moving average value of black level standard signals in the extracting range; and a clamp section for correcting a black level of the image signal based on the clamp level value.
Description
Technical field
The present invention relates to a kind of clamp level regulating circuit that the black level correction is carried out in the output of the image pick-up device from Electrofax etc.The invention still further relates to a kind of image processing equipment and image processing program that is used for handling the photographic images that Electrofax catches.
Background technology
Contain the black level noise in the output of the image pick-up device of known electronic camera traditionally, this black level noise is from the dark current component in the light receiving element.Known for those skilled in the art a kind of method of revising this class black level.This method comprises the steps, has covered the lightproof area of ambient light or the black level of part in the detection image pick device, deducts black level in the picture level of the effective pixel area of never covering then.
The black level corrective that discloses in the open No.2003-209713 of Japan's patent application co-pending comes calcuating correction value by the relatively mean value and the black level desired value of the horizontal line of the digital signal in lightproof area, provides the feedback of the correction value after the digital-to-analogue conversion to carry out the black level correction then.
Supposing has a plurality of tool defective pixels in the some horizontal line in lightproof area.Just there is room for improvement in the equipment that discloses among the open No.2003-209713 of above-mentioned like this Japan patent application co-pending, and this is because the remarkable deviation of black level mean value and right value can reduce the correction precision of black level in the part.
In addition, according to the open No.2003-209713 of above-mentioned patent application Japanese co-pending, in through the view data of revising, there is not the information relevant with the black level correction.Therefore determine what in the end to have carried out the black level correction with regard to being difficult to according to view data.Particularly when the view data of handling the process correction is regulated the brightness of image, the information relevant with the black level correction can play reference role, the brightness meeting of image depends on these information when carrying out brightness regulation, but and can provide clearly extent of amendment thus.But,, do not comprise the information relevant in the view data with the black level correction according to the open No.2003-209713 of above-mentioned patent application Japanese co-pending.Therefore, user's correction again of black level of having to carry out repeatedly with trial-and-error method.In this case, traditional Computer Image Processing is not enough to satisfy the user carries out meticulous brightness regulation to view data needs.
On the other hand, begun to be extensive use of Electrofax in recent years, Electrofax comprises and produces the image pick-up device of the numerical data (captured image data) of photographic images to carried out opto-electronic conversion by the making body image.Usually all be that the various parameters of regulating captured image data are on computers created the image that the user wants.
Like this, disclose a kind of image reproducing device among the open No.2000-66312 of Japanese patent application co-pending, can use its playback digital picture on computers.For this reason, this equipment can connect the side information relevant with shooting environmental such as shooting date and place with the captured image data that sends computer to.
In general, comprise the black level noise that dark current component causes in the output of the image pick-up device of Electrofax.Therefore thereby Electrofax can utilize the part of having covered ambient light in the image pick-up device to survey black level to carry out the black level correction by deduct the black level that detects from picture level.Therefore, when handling captured image data on computers and regulate the brightness of image, can play reference role with the relevant information of black level correction that Electrofax is carried out, the brightness meeting of image depends on these information when brightness is regulated, but and provides clearly extent of amendment thus.
But, in the captured image data that Electrofax is created, do not stay the information relevant with the black level correction traditionally.Therefore when the user thinks to handle image on computers, determine what in the end to have carried out the black level correction according to view data with regard to being difficult to.According to the open No.2000-66312 of above-mentioned patent application Japanese co-pending, in the information of replenishing, do not comprise the content-related information of the image manipulation of carrying out with Electrofax.Therefore, user's brightness of image of having to regulate repeatedly on computers with trial-and-error method.In this case, traditional technical deficiency is to satisfy the user carries out meticulous brightness regulation on computers to view data needs.
Summary of the invention
The present invention is devoted to address the above problem.Therefore an object of the present invention is to provide a kind of clamp level adjusting apparatus, it can carry out the black level correction accurately.
Another object of the present invention provides a kind of clamp level adjusting apparatus, and it makes the user can access the information relevant with the black level correction and the feasible image processing of carrying out is convenient.
Another object of the present invention provides a kind of image processing equipment, and it makes the user regulate the brightness of screen in the information of carrying out in the mutual image processing black level correction that can carry out according to Electrofax such as use a computer.
The clamp level adjusting apparatus of first aspect comprises an image pick-up device according to the present invention, a clamp level calculating section and a clamp part.
Image pick-up device comprises that one produces the effective pixel area of picture signal and the lightproof area that forms around effective pixel area, and lightproof area produces the black level standard signal.Extract the black level standard signal in the extraction scope of clamp level calculating section a plurality of horizontal line from lightproof area and produce the clamp level value corresponding with each horizontal line in the effective pixel area according to the vertical moving mean value of black level standard signal in the extraction scope.The clamp part is according to the black level of clamp level value correction image signal.
In the clamp level adjusting apparatus aspect first, preferred clamp level calculating section comprises a low pass filter, an integral part and a division part.Low pass filter reduces the radio-frequency component of the black level standard signal of each horizontal line in the lightproof area.Integral part nearly corresponding with the line number of the scope of extraction, from the output valve addition of low pass filter, with the integrated value of output extraction scope.When the number from the output valve of low pass filter that provides surpasses the line number of extraction scope, by the output valve of top line in the extraction scope is deducted the sequential update integrated value from integrated value so that output.Thereby the division part is removed integrated value with predetermined value and is produced vertical moving mean value.
Preferred integral part also comprises an addition section, a register section and a subtraction part.Addition section at least nearly corresponding with the line number of the scope of extraction, from the output valve addition of low pass filter.Register section with the storage of the form of first in first out corresponding with the line number of the scope of extraction, from the output valve of low pass filter, export to carry out order.Thereby the subtraction part deducts the output valve calculating integral value of register section and integrated value is exported to the division part from the output valve of addition section.Thereby integrated value provide back the integrated value of addition section order output be the extraction scope vertical moving and.
In addition, in the clamp level adjusting apparatus aspect first, the extraction scope of preferred clamp level calculating section from the lightproof area above the horizontal line in the top that is limited to effective pixel area produces and the corresponding clamp level value of the horizontal line in this top.
Preferably the clamp level adjusting apparatus according to first aspect further comprises a fixed value storage area and a selection part.The fixed value storing section stores has presetted and has been used for the fixed value of clamp level of black level of correction image signal.The selection portion branch selects the fixed value of clamp level and any value in the vertical moving mean value to export as the clamp level value according to user's input.
The clamp level adjusting apparatus of second aspect comprises an image pick-up device according to the present invention, a clamp level calculating section, a clamp part and an output.
Image pick-up device comprises that one produces the effective pixel area of picture signal and the lightproof area that forms around effective pixel area, and lightproof area produces the black level standard signal.The clamp level calculating section produces the clamp level value corresponding with each horizontal line in the effective pixel area according to the fixed value of black level standard signal or the clamp level that presets.The clamp part is according to the black level of clamp level value correction image signal.Output provides output by connecting the view data of the process black level correction of partly exporting from clamp with from the clamp level value that the clamp level calculating section is exported at each horizontal line in the effective pixel area.
Clamp level adjusting apparatus according to first and second aspect can be used for Electrofax.
Image processing equipment according to third aspect of the present invention can be handled the photographic images that Electrofax provides, and this Electrofax has image pick-up device, and this image pick-up device comprises effective pixel area and around the lightproof area of effective pixel area.
Image processing equipment has reading section, display part, importation and correcting process part.Reading section reads captured image data.Captured image data according to the 3rd aspect comprises view data of creating according to the output of effective pixel area and the black level normal data of creating according to the output of lightproof area.The display part shows the relation between black level normal data and the view data.Use the importation to change the black level normal data.The correcting process part is according to the black level of the black level normal data correction image data that change in the input part office.
In according to the image processing equipment aspect the 3rd, preferred display part shows the currency of black level normal data and can change scope, and shows the replay image based on view data.
In addition, in according to the image processing equipment aspect the 3rd, preferred black level normal data comprises a plurality of values, and each value and data cell to be processed connect, and these data cells are by obtaining in vertical direction or horizontal direction divide image data.In addition, when an optional specified location changes the black level normal data in the data cell of handling at, preferably in the black level normal data that changes specified location, partly change the black level normal data in the data cell of handling with correcting process, the data cell of handling is contiguous appointed positions in vertical direction or on the horizontal direction, then interpolation is carried out in the variation of the black level normal data in the preset range of assigned address, thereby make variation level and smooth.
The image processing equipment of the 4th aspect can be handled the photographic images that Electrofax provides according to the present invention, and Electrofax has image pick-up device, and image pick-up device comprises effective pixel area and around the lightproof area of effective pixel area.
This image processing equipment comprises a reading section, a singular point determining section and a correcting process part.Reading section reads captured image data.Captured image data according to the 4th aspect comprises the view data of creating according to the output of effective pixel area, these data are divided into a plurality of data cells of handling in the horizontal direction with on the vertical direction, comprise that also many black level normal data and every black level normal datas of creating according to the output of lightproof area connect with the data cell of handling.The singular point determining section is surveyed singular point according to the spatial variations of black level normal data, in the spatial variations at singular point place more than or equal to threshold value.The black level normal data that the correcting process part is corresponding with singular point according to the spatial variations correction.
According to the photographic images that the image processing device processes Electrofax of the 5th aspect provides, Electrofax has image pick-up device, and image pick-up device comprises effective pixel area and the lightproof area that forms around effective pixel area.
This image processing equipment comprises a reading section, and a correction factor produces part and a correcting process part.Reading section reads captured image data.Captured image data according to the 5th aspect comprises the view data of creating according to the output of effective pixel area, these view data in the horizontal direction or be divided into a plurality of data cells of handling on the vertical direction, also comprise many black level normal datas of creating according to the output of lightproof area, and every black level normal data connects with the data cell of handling.The correction factor generating unit divides the spatial variations according to the black level normal data to produce level or vertical blackspot correction factor.Correcting process partly uses correction factor that view data is carried out the blackspot correction.
In aspect the 3rd to the 5th, the Electrofax that preferably produces captured image data further comprises the clamp part of view data being carried out the black level correction, and the black level normal data partly locates to be used for carrying out the black level correction at clamp.
Preferably further comprise a recording section, be used for the shooting condition of store electrons camera and based on the relation between the offset of the black level normal data of shooting condition according to the 3rd image processing equipment to the 5th aspect.In addition, preferred correcting process part obtains the offset corresponding with shooting condition according to the shooting condition of Electrofax from recording section, then according to the black level of offset correction image data.
According to a sixth aspect of the invention, provide a kind of image processing program to handle the photographic images that Electrofax provides, Electrofax has image pick-up device, and image pick-up device comprises effective pixel area and the lightproof area that forms around effective pixel area.This image processing program allows computer to carry out following step:
Read the step of captured image data, wherein view data comprises view data of creating according to the output of effective pixel area and the black level normal data of creating according to the output of lightproof area;
The step that shows the relation between black level normal data and the view data; With
The step of the black level of view data being revised according to operator's the black level normal data that input changed.
According to a seventh aspect of the present invention, provide a kind of image processing program to handle the photographic images that Electrofax provides, Electrofax has image pick-up device, and image pick-up device comprises effective pixel area and the lightproof area that forms around effective pixel area.This image processing program allows computer to carry out following step:
Read the step of captured image data, wherein view data comprises the view data of creating according to the output of effective pixel area, these view data in the horizontal direction or be divided into a plurality of data cells of handling on the vertical direction, also comprise many black level normal datas of creating according to the output of lightproof area, and every black level normal data connects with the data cell of handling;
Survey the step of singular point according to the spatial variations of black level normal data, in singular point place spatial variations more than or equal to threshold value; With
Step according to the spatial variations correction black level normal data corresponding with singular point.
According to an eighth aspect of the present invention, provide a kind of image processing program to handle the photographic images that Electrofax provides, Electrofax has image pick-up device, and image pick-up device comprises effective pixel area and the lightproof area that forms around effective pixel area.This image processing program allows computer to carry out following step:
Read the step of captured image data, captured image data comprises the view data of creating according to the output of effective pixel area, these data in the horizontal direction or be divided into a plurality of data cells of handling on the vertical direction, also comprise many black level normal datas of creating according to the output of lightproof area, and every black level normal data connects with the data cell of handling;
Produce the step of level or vertical blackspot correction factor according to the spatial variations of black level normal data; With
The step of using correction factor view data to be carried out the blackspot correction.
Description of drawings
After reading following detailed in conjunction with the accompanying drawings, it is more obvious that essence of the present invention, principle and application will become, and uses parts like the same Reference numeral representation class in the accompanying drawings, wherein:
The structure chart of Fig. 1 has illustrated the clamp level adjusting apparatus according to first embodiment;
The view of Fig. 2 shows the light receiving surface of image pick-up device;
The structure chart of Fig. 3 has illustrated the clamp level calculating section of Fig. 1;
The structure chart of Fig. 4 has illustrated the integral part of Fig. 3;
The view of Fig. 5 shows the relation between the row in effective pixel area and the extraction scope;
The view of Fig. 6 shows the first clamp level value of selecting part to carry;
The structure chart of Fig. 7 has illustrated the clamp level adjusting apparatus according to second embodiment;
The functional structure of Fig. 8 illustrates the image processing equipment according to the 3rd embodiment;
The schematic explanatory view of Fig. 9 shows captured image data;
The flow chart of Figure 10 shows the process according to the image processing program of the 3rd embodiment;
The view of Figure 11 shows schematic display window, and it has shown the image processing program according to the 3rd embodiment;
The explanatory diagram of Figure 12 shows how from going of appointment the black level normal data to be interpolated into presumptive area;
The explanatory diagram of Figure 13 shows the blackout area phenomenon;
The flow chart of Figure 14 shows the process of compensation blackout area phenomenon;
The flow chart of Figure 15 shows the process of blackspot correction;
The view of Figure 16 shows schematic display window, and it has shown the image processing program according to the 4th embodiment;
The explanatory diagram of Figure 17 shows the blooming phenomenon; With
Blooming phenomenon after the explanatory diagram of Figure 18 shows spatial variations by the unusual point range of direct application and compensates.
Embodiment
Below according to embodiment and be described in detail with reference to the attached drawings the present invention.
[to the explanation of first example structure]
The structure chart of Fig. 1 has illustrated the clamp level adjusting apparatus according to first embodiment.The clamp level adjusting apparatus of first embodiment is included in the Electrofax, Electrofax comprises image pick-up device 1, clamp part 2, A/D conversion portion 3, signal output switching part 4, clamp level calculating section 5, D/A conversion portion 6, play the first selector part 7 of output effect, and CPU8.
As shown in Figure 2, the light receiving surface of image pick-up device 1 has light receiving element (photodiode), and these light receiving elements are arranged to the ranks form and carry out opto-electronic conversion, and each light receiving element forms a pixel.A vertical read line (not shown) also is provided in every row light receiving element.These vertical read lines have a horizontal read line 9 that is arranged in their output, and the output of horizontal read line is connected to clamp part 2.
As shown in Figure 2, the zone that is provided with the image pick-up device 1 of light receiving element is divided into effective pixel area 10 and lightproof area (black region of light) 11, and lightproof area 11 is formed on the neighboring of effective pixel area 10.The optical module (not shown) is formed to be gathered signal charge by the brightness of making body image to effective pixel area 10 in each light receiving element according to taking.Produce picture signal according to signal charge, this picture signal is used to create photographic images.
On the other hand, use surface that shielding film covers lightproof area 11 to make it not to be subjected to the irradiation of ambient light.Can think from the output of lightproof area 11 with not by the corresponding data of part of making body light incident (promptly by the black of making body image).In lightproof area 11, survey because the variation of temperature etc. is caused and accumulate in electric charge (dark current component) in the light receiving element.According to this class charge generation black level standard signal.
Signal by following mode reading images pick device 1.At first get signal the top line of image pick-up device 1 to the right-hand member sequential read from left end.Get signal the next line and then from left end to the right-hand member sequential read then.Utilizing scanning to repeat identical step subsequently by this way comes sequential read to round the signal of screen.Shown in Fig. 2 and 5, the upside of effective pixel area 10 in image pick-up device 1, the specifically created capable lightproof area 11 of k (k 〉=2).Therefore, at image pick-up device 1 image pick-up device 1 capable special black level standard signal of output k continuously before the output signal from the row of effective pixel area 10.
Clamp part 2 deducts clamp level value described later and comes the black level correction is carried out in the output of image pick-up device 1 from the picture signal of image pick-up device 1 and black level standard signal.Thereby analog-to-digital conversion digital image signal and black level standard signal are carried out in the output of 3 pairs of clamp parts 2 of A/D conversion portion.
Signal output switching part 4 is connected with first selector part 7 with clamp level calculating section 5.Thereby signal output switching part 4 extracts the black level standard signal of the predetermined portions (m of a horizontal line pixel) the lightproof area 11 from the destination of the digital signal of A/D conversion portion 3 receptions according to the instruction switching of CPU8.
Clamp level calculating section 5 calculates the vertical moving mean value in the extraction scopes (m takes advantage of n pixel), and the extraction scope comprises capable (the black level standard signal of an aforementioned m pixel of n=＞2 and n＜=k) of n.The sum of the vertical moving mean value of clamp level calculating section 5 outputs is corresponding with the number of the horizontal line of effective pixel area 10.
As shown in Figure 3, clamp level calculating section 5 comprises LPF (low pass filter) 12, integral part 13, division part 14, fixed value storage area 15 and the second selector part 16 that plays the selection partial action.
The mean value that LPF12 calculates m pixel of black level standard signal to each horizontal line reduces the radio-frequency component by the caused black level standard signal of output of defectiveness pixel etc.LPF12 can also calculate the weighted average of black level standard signal or each horizontal line be calculated the summation of m pixel of black level standard signal each horizontal line.
Addition section 13a according to the instruction of CPU8 the output valve addition of the capable LPF12 of n at least so that offer subtraction part 13c.When being provided for from output that subtraction part 13c returns, addition section 13a adds on the output valve of LPF12 by subtraction part 13c and returns the input value that provides so that offer subtraction part 13c.
Register section 13b can store the output valve of the capable LPF12 of n with the data structure of first in first out altogether.Register section 13b offers subtraction part 13c to those output valves that surpass n line output value from LPF12 in order.The initial default of register section 13b is zero.
Subtraction part 13c comes calculating integral value by the output valve that deducts register section 13b from the output valve of addition section 13a.
Division part 14 the integrated values that receive from subtraction part 13c divided by predetermined value (as: if LPF12 output mean value is just divided by n, if LPF12 output value m pixel and just take advantage of n divided by m) thus the vertical moving mean value in the generation extraction scope.
The fixed value of fixed value storage area 15 memory clamp level, these fixed values are that the black level correction of carrying out picture signal is set by the user.
According to the input of user from camera operation part (not shown), second selector part 16 is according to any the value output clamp level value in the clamp level fixed value of the vertical moving mean value of division part 14 or fixed value storage area 15.
The clamp level value of second selector part 16 being sent here at D/A conversion portion 6 places is converted to analog signal to export to clamp part 2.The clamp level value of sending from second selector part 16 also offers first selector part 7 by input delay part (not shown).
CPU8 is for example by sending the operation of each part of gathering the commands for controlling Electrofax of time correlation with electric charge for image pick-up device 1, and carries out various required operational processes, as focusing control and exposure control.For example, CPU8 sends the instruction of gathering time correlation with electric charge for image pick-up device 1.CPU8 also preserves the positional information (being the height and the width of effective pixel area 10 and lightproof area 11) of effective pixel area 10 and lightproof area 11 in the image pick-up device 1.CPU8 is according to the output switching timing of clock count control signal output switching part 4, clamp level calculating section 5 and first selector part 7.
[running of first embodiment and effect]
Structure according to the clamp level adjusting apparatus of first embodiment has been described above.Explain the running and the effect of this equipment below based on two kinds of situations: create the situation of clamp level value and use the situation of the fixed value of clamp level as the clamp level value from lightproof area.
[creating the situation of clamp level value from lightproof area]
In this case, the user is set at the input of division part 14 output of second selector part 16.
At first, the user makes CPU8 control image pick-up device 1 carry out by the opto-electronic conversion of making body image to the releasing operation of shutter.Begin delegation from top line and connect the output signal that delegation's ground order reads the light receiving element the image pick-up device 1.
The output signal that reads from image pick-up device 1 is offered signal output switching part 4 according to the order that they are read by clamp part 2 and A/D conversion portion 3.Signal output switching part 4 flows to first selector part 7 to the pixel that is arranged in from the left screen end of image pick-up device 1 to this zone of right-hand member of effective pixel area 10 according to the instruction of CPU8.Signal output switching part 4 flows to clamp level calculating section 5 and first selector part 7 to the pixel output (being the output of m pixel) that is arranged in from the right side of effective pixel area 10 right-hand members to this zone of screen right-hand member then.In other words, clamp level calculating section 5 receives only the black level standard signal from the lightproof area 11 that is arranged in effective pixel area 10 right sides.
The mean value of m pixel of the LPF12 calculating black level standard signal of clamp level calculating section 5 is so that flow to the addition section 13a and the register section 13b of integral part 13.The capable mean value addition of n that addition section 13a transports LPF12 is exported to subtraction part 13c to the summation (m takes advantage of n pixel) of the scope of extraction then.On the other hand, receive more than n before the capable value at register section 13b, it exports initial value of zero always.Therefore, subtraction part 13c exports to addition section 13a and division part 14 all of the scope of extraction with as integrated value.
On the other hand, when integral part 13 receives and (n+1) row during corresponding average from LPF12, add on the integrated value that addition section 13a has just obtained in front that mean value of (n+1) row flows to subtraction part 13c then.When receiving the mean value of (n+1) row, register section 13b exports to subtraction part 13c to the mean value of first row (output valve of top delegation in the extraction scope of tight front).Subtraction part 13c deducts the mean value of first row from the output valve (m takes advantage of the summation in (n+1) scope) of addition section 13, so that the integrated value that moves down the extraction scope of delegation is exported to addition section 13a and division part 14.With this form integral part 13 is repeated the same operation subsequently, so just order has been exported vertical moving and the value as the extraction scope of integrated value.
The line number (promptly being worth n) of division part 14 usefulness extraction scopes is removed the integrated value of integral part 13, then the vertical moving mean value of the extraction scope that obtains is exported as the clamp level value.By D/A conversion portion 6 the clamp level value is offered clamp part 2 on the one hand, by input delay part (not shown) the clamp level value is offered first selector part 7 on the other hand.Then, clamp part 2 utilizes the output signal of (n+1) row in the image pick-up device 1 to carry out the black level correction according to the clamp level value.
As shown in Figure 5, suppose that here (n+1) row is the top line of effective pixel area 10.In this case, use comprises that the capable m of tight front n takes advantage of the mean value of n pixel that picture signal and the black level standard signal that (n+1) goes carried out the black level correction.Therefore in first embodiment, can carry out high-precision black level correction, significantly reduce the adverse effect that causes by defectiveness pixel in the lightproof area etc.
In the output signal of (n+1) row that passes through the black level correction, the black level standard signal of the lightproof area corresponding with the extraction scope 11 is offered signal output switching part 4 to produce the clamp level value to (n+2) row.That is to say, the black level correction of tight front delegation always is reflected on the clamp level value.Therefore, first embodiment can carry out progressively black level correction to effective pixel area 10, and can be in the adjacent two unexpected variations that produce the clamp level value in the ranks up and down.
In addition, (n+1) line output signal that passes through the black level correction is offered first selector part 7.As described below, first selector part 7 is switched between each output according to the instruction of following CPU8.
That is to say that for the zone of the left screen end of going from (n+1) to the right-hand member of effective pixel area 10,7 outputs of first selector part are from the signal of signal output switching part 4.
On the other hand, thus first selector part 7 will switch to the clamp level value of clamp level calculating section 5 outputs corresponding to (n+1) row about the output at the right-hand member place of screen right side lightproof area 11.So just can be being used for the clamp level value that corresponding line carries out the black level correction is outputed to the precalculated position (see figure 6) of lightproof area 11.
Subsequently, after finishing conveying clamp level value, first selector part 7 is exported at the signal of (n+1) row in the scope of right screen end exporting switching letter in reply number output switching part 4, does not still comprise the scope of the signal that has write down its clamp level value.Subsequently, each row is repeated the same operation in the same way, be used for carrying out black level correction and and the clamp level value that connects of every row of effective pixel area 10 thereby can export.
Therefore, first embodiment makes the user to allow the black level extent of amendment according to what the clamp level Value Data of effective pixel area 10 every row was known view data.Therefore, in first embodiment, when image data processing on computers,, meticulous adjusting is carried out in brightness so facilitate because the user can use aforesaid clamp level value.This is effective especially during according to the initial data of first embodiment (data that clamp level adjusting apparatus is carried) for software processes on using a computer.
Respond operations such as being provided with of user, CPU8 samples to the clamp level value that produces according to the black level standard signal and the fixed value of the clamp level value that obtains as clamp level is stored in the fixed value storage area 15.In this case, for example the variation of optical module etc. is taken in response, and in due course, the user can select the clamp level fixed value of suitable photo environment to take pictures from fixed value storage area 15.
Certainly, the user can further handle the fixed value that the clamp level value of creating according to the black level standard signal produces clamp level.For example can suppose that the clamp level value through over-sampling is 200LSB.In this case, when the user wants brighter image, the user can be provided with by the fixed value of clamp level is changed into 100LSB, and when the user wanted darker image, the user can be provided with by the fixed value of clamp level is changed into 300LSB.In this case, with respect to the clamp level value through over-sampling, the user can be provided with the fixed value of clamp level voluntarily.So just can be relatively simply realize setting to the black level correction according to user's wish.
[using the situation of the fixed value of clamp level] as the clamp level value
In this case, the user is the output that is set at second selector part 16 from the input of fixed value storage area 15.In this case, the output destination of signal output switching part 4 is fixed to first selector part 7.Clamp level calculating section 5 is exported the fixed value that is stored in the clamp level in the fixed value storage area 15 as the clamp level value.According to the fixed value of clamp level, the output signal of 2 pairs of image pick-up devices 1 of clamp part is carried out the black level correction.
On the other hand, first selector part 7 output from signal output switching part 4 about the signal this zone of 10 right-hand members from the left screen end to effective pixel area.Simultaneously, first selector part 7 will be about the fixed value that clamp level calculating section 5 is exported the clamp level corresponding with associated row that is outputted at the right-hand member place of screen right side lightproof area 11.Subsequently, after the output of the fixed value of finishing clamp level, first selector part 7 will be exported switching letter in reply number output switching part 4 and carry up to the interior signal of the right screen end scope of corresponding line, but not comprise the scope of the signal that has write down its clamp level fixed value.Subsequently, by this way every row is repeated identical operations, thus the clamp level value (fixed value of clamp level) that can be used for carrying out the black level correction corresponding to every line output of effective pixel area 10.So just can realize and top the same effect.
[to the explanation of second embodiment]
The structure chart of Fig. 7 has illustrated the clamp level adjusting apparatus according to second embodiment.The clamp level adjusting apparatus of second embodiment is the example that carries out the black level correction according to the mean value of the delegation of lightproof area 11.That is to say, second embodiment according to the mean value of delegation's (m pixel) in the lightproof area 11 that transports from LPF12 to the every row generation clamp level value the effective pixel area 10.Other structure of second embodiment is the same with first embodiment with operation, no longer is repeated in this description here.
Second embodiment can be used for carrying out the clamp level value of black level correction corresponding to every line output of effective pixel area 10.So just can handle image with the information relevant to each enforcement of effective pixel area 10 with the clamp level value.
[the 3rd embodiment]
The functional structure of Fig. 8 illustrates the image processing equipment according to the 3rd embodiment.This embodiment is an example of image processing equipment institutional framework, and it waits the carries out image processing program by using personal computer.
At first explain the summary of this embodiment captured image data to be processed with reference to figure 9.The captured image data that Electrofax generated comprises view data and black level normal data.Create view data according to output from the effective pixel area of image pick-up device in the Electrofax, and pictorial data representation with the shooting optical module of Electrofax form by the making body image.On the other hand, create the black level normal data according to the output of lightproof area (optic black region), the periphery of the contiguous effective pixel area of lightproof area forms, and its surface covers with shielding film.
Can be thinking from the output of the lightproof area in the image pick-up device and not incided corresponding data of part (promptly by the black part of making body image) on it by making body light.Therefore Electrofax uses the output of lightproof area that view data is carried out the black level correction.
In the example of Fig. 9, Electrofax has been used for the clamp data that each horizontal line is carried out the black level correction are recorded in the part (seeing Fig. 9 (b)) of the lightproof area that is arranged in the view data right side.In end of each row of view data, write down and be used for each clamp data that corresponding line is revised.In this embodiment, the black level normal data of aforesaid clamp data representation level.Some Electrofaxs can be revised all row with identical black level value, perhaps with identical black level value the combination of multirow are revised.In these situations, handle according to data cell record clamp data.
Explain structure now according to the image processing equipment 31 of this embodiment.Image processing equipment 31 comprises microprocessor 32, memory 33, bus interface part 34, display driver part 35, disk drive part 36 and the system bus 37 that is connected various piece.Image processing equipment 31 also is connected with importations such as keyboard or fixed-point apparatus 38 and display 39.
Microprocessor 32 is controlled each part of image processing equipments 31 and is carried out the black level that image processing program described later is revised captured image data.Memory 33 is with the offset of the form of the form storage shooting condition feature of the image pick-up device of camera type, shooting time and exposure correction (as depend on) and black level normal data, and wherein the offset of black level standard signal changes according to the combination of shooting condition.The user can be in advance with the method for statistics or determine the offset of black level normal data according to user's wish.
34 pairs of data communication with peripheral hardware of bus interface part are controlled, and peripheral hardware connects image processing equipment 31, and meets serial transmission standards such as USB (USB) or IEEE1394 standard.Display driver part 35 is exported to display 39 to image.Disk drive part 36 is the read and write data on magnetic-optical storage medium.
The structure that has this form according to the image processing equipment 31 of the 3rd embodiment.Below with reference to the flow chart description of Figure 10 process according to the image processing program of this embodiment.
Step S101: the magnetic-optical storage medium that microprocessor 32 is gone up or inserted the disk drive part 36 from the storage medium that is connected with bus interface part 34 (or self be connected on the bus interface part 34 Electrofax) reads captured image data.
Step S102: microprocessor 32 output image datas and black level normal data are to show on display 39.As shown in figure 11, at the replay image 40 of the center of display 39 display image data.The left side of the replay image 40 on display 39 has viewing area 41, and it shows the currency according to the black level value of black level normal data.The 41 indications black level value corresponding in viewing area with each horizontal line of view data.
Therefore, the user can check the black level value according to captured image data (playback of data) and clamp data on replay image on the display 39 40 and viewing area 41.Therefore the user can know clearly the variable range of black level value of view data and the variation of the black level value on the vertical direction of screen, thereby determines whether and will revise.
Step S103: microprocessor 32 judges whether the user stops shown replay image data are changed (for example whether the user has indicated the captured image data that will read other or stopped image processing program).If the user stops change (YES), the processing that microprocessor 32 stops the current shooting view data.At this moment can on any storage medium, store captured image data.On the other hand, if the user does not stop change (NO), microprocessor 32 advances to step S104.
Step S104: microprocessor 32 judges whether automatic modification model is OFF.If modification model is OFF (YES) automatically, microprocessor 32 advances to step S105.On the other hand, if modification model is ON (NO) automatically, microprocessor 32 advances to step S106.
Step S105: in this case, microprocessor 32 carries out the black level correction according to user's input to view data.The user uses the row of pointer 42 to specify the black level value to change on the 38 operation display area territories 41, importation.Then, the user can drag pointer 42 or directly import the numerical value of black level value in the capable side direction of appointment, so just changed the black level value of nominated bank.
For example, suppose that view data has 12 bit representation zones (0 to 4095LSB: the big more color of numerical value is light more).At this moment, if the black level value of nominated bank is 200LSB, represent replay image with 200 to 4095LSB halftoning level.When the user wants brighter image, increase the black level value, when the user wants darker image, reduce the black level value.Then, the difference between the black level value before and after microprocessor 32 bases change is the black level of correction image data once more, so just is updated in the black level normal data of the view data of nominated bank with the black level Value Data after changing.
If in aforesaid correction, only the black level of nominated bank is revised, just may cause the nominated bank of such correction and the surrounding environment in the replay image to isolate.For fear of this situation, when nominated bank is carried out the black level correction, microprocessor 32 simultaneously also in presumptive area with nominated bank adjacent above and below several row carry out corresponding black level correction (seeing Figure 12).
For example, in the row of nominated bank's preset range, microprocessor 32 can multiply by a resulting value of interpolation coefficient to the change value of nominated bank's black level value and be added on the current black level value and revise.Like this with regard to the variation of level and smooth black level in from the nominated bank to the preset range.Aforesaid interpolation coefficient less than 1, and is set at it from nominated bank's its value far away more also more little greater than 0.Black level value in special preferred settings interpolation coefficient makes from the nominated bank to the preset range is according to curvilinear motion.Can use and calculate interpolation coefficient as known interpolation methods such as spline interpolations.
After at step S105 black level being revised, microprocessor 32 returns step S102 and show replay image and the black level value through upgrade of its black level through revising again on display 39.The user just can determine whether correctly to have carried out the black level correction like this.
Step S106: in this case, user's the microprocessor 32 that is arranged so that is carried out following (1) makeover process to (3) selectively.
(1) revises the blackout area phenomenon
Term used herein " blackout area phenomenon " is meant that the image of process black level correction shows the dark fringe (seeing Figure 13) with respect to its surrounding environment.The cause of this phenomenon is to be positioned near the high brightness of lightproof area that is used for the black level correction to be made stray light enter close high brightness by the lightproof area of making body by making body, thereby has increased signal level.In this modification model, microprocessor 32 is carried out the following operation that is shown in Figure 14.
At first, microprocessor 32 calculate each of each row and its neighbouring row black level normal data between capable poor (spatial variations) (S201).Then, microprocessor 32 is surveyed singular point, and the spatial variations of calculating at the singular point place is more than or equal to threshold value (S202).Comprise the starting point (or terminal point) of that delegation of this singular point corresponding to the blackout area phenomenon.Microprocessor 32 is according to the black level value in the capable spatial variations correction of the singular point zone corresponding with singular point (that delegation that the blackout area phenomenon promptly occurs) then, thus the black level of correction image data (S203).Use the black level normal data in the post-processing step of image processing equipment, aforesaid operation also can alleviate the blackout area phenomenon of photographic images, thereby better photographic images is provided.
(2) blackspot correction
This correction is used for revising because the influence of the sensitivity of transducer etc. appears at the local deformation (blackspot) on the output amplitude of image pick-up device of Electrofax.In this modification model, microprocessor 32 is carried out the following process shown in Figure 15.
At first, microprocessor 32 in vertical direction with certain spacing to the black level value sample calculate between each bar black level normal data difference (spatial variations) (S301).Then, microprocessor 32 is set at offset (S302) to the black level value in given sample point.Microprocessor 32 is added in values that change based on every row space the blackspot correction factor (S303) that calculates every row on the offset of S302.Thereby 32 pairs of every provisional capitals of microprocessor deduct the black level (S304) of blackspot correction factor correction image data from the black level value then.Use the black level normal data in the post-processing step of image processing equipment, aforesaid operation also can be to carrying out the blackspot correction on the vertical direction on the screen, thereby better photographic images is provided.
(3) use based on the offset of shooting condition and do correction
In this modification model, microprocessor 32 reads the offset of black level normal data from memory 33 according to the setting of the shooting condition (as type, shooting time and the exposure correction etc. of camera) of the prior appointment of user.Microprocessor 32 is according to the black level of offset correction image data then.In the post-processing step that image processing equipment carries out subsequently, also can utilize aforesaid operation to carry out according to the difference of shooting condition and different black level corrections, thereby the photographic images that provides the user to want is provided in simple mode.
Carry out the black level correction in step S106 after, microprocessor 32 moves to step S102 and is showing on the display 39 that its black level is through the replay image of correction again and the black level value after the renewal.So just make the user can determine whether correctly to have carried out the black level correction.Further revise if desired, thereby can in S105, carry out the photographic images that manual correction realizes that the user wants.
[to the explanation of the 4th embodiment]
Figure 16 shows the display window according to the image processing program of the 4th embodiment.The 4th embodiment is a kind of improved form of the 3rd embodiment, and their difference is to use the clamp data that each horizontal line of view data is carried out the black level correction, and uses the data of lightproof area that each vertical row is carried out the correction operation.In the accompanying drawings, represent and the 3rd parts that embodiment is the same and repetition of explanation no longer with similar label.
According to the microprocessor 32 of the 4th embodiment above being arranged in effective pixel area or below the initial data of lightproof area create the black level normal data corresponding with each vertical row.The top of the display 39 in Figure 16 above the replay image 40 provides a viewing area 41, and wherein each vertical row to view data shows the black level value.
Thereby the 4th embodiment makes the user can change the black level value of given row to the pointer 42 in each vertical row operation display area territory 41, so just revised the black level of view data once more.Cover the black level value corresponding with the vertical direction of view data and it with given form be stored in the data area with the corresponding not use part of lightproof area in.
In addition, the 4th embodiment can change the black level value of view data in vertical direction, like this except can revising " blooming " that pass through the screen upper and lower side passing through the blackspot of holding about screen revises.The term here " blooming " is meant that the high brightness that CCD catches is made electronics surpass the saturation capacity of pixel by making body, causes electronics to spill into phenomenon (seeing Figure 17) in the contiguous pixel along the read line of CCD.
Microprocessor 32 can phenomenon step much at one in enough and aforementioned blackout area be revised blooming.That is to say, microprocessor 32 calculate each row and about difference (spatial variations) between the black level normal data of each row adjacent with it.Then, microprocessor 32 is surveyed singular point, and the spatial variations of calculating at the singular point place is more than or equal to threshold value.Comprise the starting point (or terminal point) of those row of this singular point corresponding to blooming.Microprocessor 32 changes the zone interior black level value corresponding with singular point (those row that blooming promptly occurs) according to spatial variations then, thus the black level of correction image data.
If carry out the blooming correction by the spatial variations that deducts unusual point range from the black level value, so revised part can be shown as dark fringe at high brightness by the making body place, has so just provided false image (seeing Figure 18).So when carrying out the blooming correction, the spatial variations of not using unusual point range is as correction value, but preferred usage space changes the value of taking advantage of the given factor (as 50% to 80% value of spatial variations) as correction value.In the post-processing step that is undertaken by image processing equipment subsequently, aforesaid operation can alleviate the blooming that passes through the screen upper and lower side, thereby better photographic images is provided.
[addition item of embodiment]
The invention is not restricted to the embodiments described, need not to depart from the spirit and scope of the present invention and just can carry out various improvement.Can improve a part or all parts.
(1) for example, in first and second embodiment, produce the clamp level value from the lightproof area of screen right-hand member.But, also can provide the lightproof area that the extraction scope is arranged on the screen left end vertical direction moving average of extraction scope as the clamp level value.In this case, the same effective pixel area that can comprise and will revise in the extraction scope produces the clamp level value with the lightproof area of delegation.
(2) in addition, in first and second embodiment, the output needle of clamp level value is connected each row and the right-hand member that is positioned at the lightproof area 11 on screen right side.But the invention is not restricted to the method for this output clamp level value.For example, in order the relation between each row of effective pixel area and the clamp level value to be write on a part of lightproof area below the effective pixel area or to write on the given marked region of final image data, can in clamp level calculating section 5 grades, provide the memory (not shown) of temporary transient memory clamp level value to each row.Setting to the extraction scope among Fig. 5 is exemplary.Certainly change the number m and the line number n of horizontal pixel in the extraction scope as required.
(3) in first and second embodiment, the image pick-up device 1 that illustrates has adopted X-Y addressing scheme (as CMOS or LBCAST).But, also can use the employing image pick-up device 1 of electric charge transfer scheme (as CCDs) in proper order.
(4) in the 3rd embodiment, for blackout area, blackspot and blooming phenomenon are revised, the manual correction (S105) that also can use the user to carry out.
In the 3rd and the 4th embodiment, explained the example of the image processing equipment on using a computer.But, for example also can on Electrofax, carry out aforesaid program, thereby can be on Electrofax automatically the blackout area phenomenon or the blooming of the image of being caught be revised.In this case, do not need always the black level value to be shown.
For the convenience of understanding, below the effect of previous embodiment is described with general statement in addition.
The extraction scope of a plurality of horizontal line in the mobile in vertical direction lightproof area of above-mentioned clamp level adjusting apparatus produces the clamp level value corresponding with each horizontal line of effective pixel area according to the moving average of extracting scope.Therefore,, high-precision black level correction can be carried out too, and the adverse effect of defectiveness pixel etc. can be significantly reduced even have defective pixels in certain particular horizontal line of lightproof area.
In addition, aforesaid clamp level adjusting apparatus can be exported the clamp level value of picture signal having been carried out the black level correction corresponding to each horizontal line of effective pixel area.Therefore, the user can regulate the brightness of image according to the clamp level Value Data of each horizontal line of image, thereby the precise image that is easy to carry out enhancing is handled.
Aforesaid image processing equipment or image processing program can carry out the black level normal data of black level correction and view data to Electrofax and connect together and show.The information of the black level correction that just can carry out according to Electrofax of user is regulated the brightness of screen like this, therefore, and the meticulous black level correction that the user can use a computer at an easy rate etc. and to strengthen in mutual image processing.This is effective especially when the initial data of using the software processes Electrofax on computers (data that image pick-up device is carried).
Claims (18)
1. clamp level adjusting apparatus comprises:
An image pick-up device, it comprises the effective pixel area that produces picture signal and centers on described effective pixel area formation to produce the lightproof area of black level standard signal;
A clamp level calculating section, extract the black level standard signal in the extraction scope of its a plurality of horizontal line from described lightproof area, and produce the clamp level value corresponding with each horizontal line in the described effective pixel area according to the vertical moving mean value of black level standard signal in the described extraction scope; With
A clamp part, it is according to the black level of the described picture signal of described clamp level value correction.
2. clamp level adjusting apparatus according to claim 1, wherein said clamp level calculating section comprises:
A low pass filter, it reduces the radio-frequency component of the described black level standard signal of each horizontal line in the described lightproof area;
An integral part, its nearly corresponding with the line number of described extraction scope, from the output valve addition of described low pass filter, to export the integrated value of described extraction scope, when the output valve that described low pass filter is provided surpassed the line number of described extraction scope, described integral part was by deducting the described integrated value of sequential update to the output valve of top delegation in the described extraction scope so that output from integrated value; With
A division part, thus it is removed described integrated value with predetermined value and produces described vertical moving mean value.
3. clamp level adjusting apparatus according to claim 2, wherein:
Described integral part comprises:
An addition section, it at least nearly corresponding with the line number in the described extraction scope, from the output valve addition of described low pass filter so that output,
A register section, it with the form of first in first out serve as the basis storage corresponding with the line number in the described extraction scope, from the output valve of described low pass filter with carry out order and export and
A subtraction part, thus it deducts the output valve of described register section and calculates described integrated value and described integrated value is exported to described division part from the output valve of described addition section; With
Thereby described integrated value provide back vertical moving that the described integrated value of described addition section order output becomes described extraction scope and.
4. clamp level adjusting apparatus according to claim 1, the wherein said clamp level calculating section described extraction scope from the described lightproof area above the horizontal line in the top that is limited to described effective pixel area produces and the corresponding clamp level value of the horizontal line in described the top.
5. according to claim 1 and 4 described clamp level adjusting apparatus, further comprise:
A fixed value storage area, its storage presetted the black level that is used for revising described picture signal clamp level fixed value and
Select part for one, it selects the fixed value of described clamp level and any value in the described vertical moving mean value to export as described clamp level value according to user's input.
6. clamp level adjusting apparatus comprises:
An image pick-up device, it comprises the effective pixel area that produces picture signal and centers on described effective pixel area formation to produce the lightproof area of black level standard signal;
A clamp level calculating section, it is according to the generation clamp level value corresponding with each horizontal line in the described effective pixel area in the fixed value of described black level standard signal and the clamp level that presets,
A clamp part, it according to the black level of the described image of described clamp level value correction and
An output, it provides output by connecting the view data of the process black level correction of partly exporting from described clamp with from the described clamp level value that described clamp level calculating section is exported at each horizontal line in the described effective pixel area.
7. Electrofax, it comprises clamp level adjusting apparatus according to claim 1.
8. Electrofax, it comprises clamp level adjusting apparatus according to claim 4.
9. image processing equipment, it handles the photographic images that Electrofax provides, this Electrofax has image pick-up device, and this image pick-up device comprises effective pixel area and the lightproof area that forms around described effective pixel area, and this image processing equipment comprises:
A reading section, it reads captured image data, and captured image data comprises view data of creating according to the output of described effective pixel area and the black level normal data of creating according to the output of described lightproof area;
A display part, it shows the relation between described black level normal data and the described view data;
An importation, it changes described black level normal data; With
A correcting process part, it is according to the black level of the described view data of described black level normal data correction that changes in described input part office.
10. image processing equipment according to claim 9, wherein said display part show the currency of described black level normal data and can change scope and based on the replay image of described view data.
11. according to claim 9 and 10 described image processing equipments, wherein:
Described black level normal data comprises a plurality of values, and each value and the data cell of handling connect, and these data cells obtain by dividing described view data in vertical direction or horizontal direction;
When an optional specified location changes the black level normal data in the described data cell of handling, in the black level normal data that changes described specified location, described correcting process partly changes the black level normal data in the described data cell of handling, the described data cell of handling is contiguous described assigned address in vertical direction or on the horizontal direction, then interpolation is carried out in the variation of the black level normal data in the preset range of described assigned address, thereby making to change seems level and smooth.
12. image processing equipment, it handles the photographic images that Electrofax provides, this Electrofax has image pick-up device, and this image pick-up device comprises effective pixel area and the lightproof area that forms around described effective pixel area, and this image processing equipment comprises:
A reading section, it reads captured image data, captured image data comprises view data, these view data are created according to the output of described effective pixel area and in the horizontal direction or be divided into a plurality of data cells of handling on the vertical direction, also comprise many black level normal datas, they are created according to the output of described lightproof area and every black level normal data and the described data cell of handling connect;
A singular point determining section, it surveys singular point according to the spatial variations in the described black level normal data, in singular point place spatial variations more than or equal to threshold value; With
A correcting process part, the described black level normal data that it is corresponding with described singular point according to described spatial variations correction.
13. image processing equipment, it handles the photographic images that Electrofax provides, this Electrofax has image pick-up device, and this image pick-up device comprises effective pixel area and the lightproof area that forms around described effective pixel area, and this image processing equipment comprises:
A reading section, it reads captured image data, captured image data comprises view data, these view data are created according to the output of described effective pixel area and in the horizontal direction or be divided into a plurality of data cells of handling on the vertical direction, also comprise many black level normal datas, they are created according to the output of described lightproof area, and every black level normal data and the described data cell of handling connect;
A correction factor produces part, and it produces level or vertical blackspot correction factor according to the spatial variations in the described black level normal data; With
A correcting process part, it uses described correction factor that described view data is carried out the blackspot correction.
14. as the described image processing equipment of claim 9,12 and 13, wherein:
Described Electrofax further comprises the clamp part of described view data being carried out the black level correction; With
Described black level normal data partly locates to be used for carrying out the black level correction at described clamp.
15. as claim 9,12 and 13 described image processing equipments, further comprise a recording section, it stores the shooting condition of described Electrofax and based on the relation between the offset of the described black level normal data of described shooting condition, and wherein
Described correcting process part obtains the described offset corresponding with described shooting condition according to the shooting condition of described Electrofax from described recording section, then according to the black level of the described view data of described offset correction.
16. image processing program, it handles the photographic images that Electrofax provided, this Electrofax comprises an image pick-up device, this image pick-up device comprises effective pixel area and the lightproof area that forms around described effective pixel area, and this image processing program allows computer to carry out following step:
Read captured image data, wherein captured image data comprises view data of creating according to the output of described effective pixel area and the black level normal data of creating according to the output of described lightproof area;
Show the relation between described black level normal data and the described view data; With
The described black level normal data that input changed according to the operator is revised the black level of described view data.
17. image processing program, it handles the photographic images that Electrofax provided, this Electrofax comprises an image pick-up device, this image pick-up device comprises effective pixel area and the lightproof area that forms around described effective pixel area, and this image processing program allows computer to carry out following step:
Read captured image data, wherein captured image data comprises view data, these view data are created according to the output of described effective pixel area and in the horizontal direction or be divided into a plurality of data cells of handling on the vertical direction, also comprise many black level normal datas, they are created according to the output of described lightproof area and every black level normal data and the described data cell of handling connect;
Survey singular point according to the spatial variations of described black level normal data, in singular point place spatial variations more than or equal to threshold value; With
The described black level normal data corresponding with described singular point according to described spatial variations correction.
18. image processing program, it handles the photographic images that Electrofax provided, this Electrofax comprises an image pick-up device, this image pick-up device comprises effective pixel area and the lightproof area that forms around described effective pixel area, and this image processing program allows computer to carry out following step:
Read captured image data, captured image data comprises view data, these view data are created according to the output of described effective pixel area and in the horizontal direction or be divided into a plurality of data cells of handling on the vertical direction, also comprise many black level normal datas, they are created according to the output of described lightproof area and every black level normal data and the described data cell of handling connect;
Spatial variations according to described black level normal data produces level or vertical blackspot correction factor; With
Use described correction factor that described view data is carried out the blackspot correction.
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| JP2004138375 | 2004-05-07 | ||
| JP2004-138375 | 2004-05-07 | ||
| JP2004138375A JP4403873B2 (en) | 2004-05-07 | 2004-05-07 | Clamp level adjusting device and electronic camera |
| JP2004-187768 | 2004-06-25 | ||
| JP2004187768A JP4507719B2 (en) | 2004-06-25 | 2004-06-25 | Image processing apparatus and image processing program |
| JP2004187768 | 2004-06-25 |
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| CN2005100667092A Active CN1694507B (en) | 2004-05-07 | 2005-04-30 | Clamp level adjusting apparatus, electronic camera, image processing apparatus |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101848309A (en) * | 2009-03-25 | 2010-09-29 | 精工爱普生株式会社 | image processing apparatus, image processing method and program |
| CN101998031B (en) * | 2009-08-21 | 2012-06-27 | 凌阳科技股份有限公司 | Filtering system and method for removing ringing noises in video signal in scaler |
| CN102883108A (en) * | 2011-07-11 | 2013-01-16 | 佳能株式会社 | Image processing apparatus and control method for image processing apparatus |
| CN103037178A (en) * | 2011-09-30 | 2013-04-10 | 索尼公司 | Image processing apparatus, correcting method, and imaging apparatus |
| CN102045492B (en) * | 2009-10-22 | 2013-05-22 | 英属开曼群岛商恒景科技股份有限公司 | Signal chain of image system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4507719B2 (en) * | 2004-06-25 | 2010-07-21 | 株式会社ニコン | Image processing apparatus and image processing program |
| US8072513B2 (en) | 2007-05-02 | 2011-12-06 | Canon Kabushiki Kaisha | Image capturing system, signal processing circuit, and signal processing method |
| JP2013030828A (en) | 2011-07-26 | 2013-02-07 | Toshiba Corp | Solid-state image pickup device |
| JP2013150144A (en) * | 2012-01-19 | 2013-08-01 | Hitachi Kokusai Electric Inc | Imaging method and imaging apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4030605B2 (en) * | 1995-11-10 | 2008-01-09 | オリンパス株式会社 | Electronic imaging device |
| JPH1079893A (en) * | 1996-09-05 | 1998-03-24 | Sony Corp | Clamp circuit for video signal |
| JP2000156822A (en) * | 1998-11-19 | 2000-06-06 | Sony Corp | Clamp circuit |
| JP3808349B2 (en) * | 2001-01-12 | 2006-08-09 | 三菱電機株式会社 | Black level correction device |
| JP4066669B2 (en) * | 2002-02-18 | 2008-03-26 | 株式会社ニコン | Imaging device |
-
2004
- 2004-05-07 JP JP2004138375A patent/JP4403873B2/en not_active Expired - Lifetime
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2005
- 2005-04-30 CN CN2005100667092A patent/CN1694507B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101848309A (en) * | 2009-03-25 | 2010-09-29 | 精工爱普生株式会社 | image processing apparatus, image processing method and program |
| CN101998031B (en) * | 2009-08-21 | 2012-06-27 | 凌阳科技股份有限公司 | Filtering system and method for removing ringing noises in video signal in scaler |
| CN102045492B (en) * | 2009-10-22 | 2013-05-22 | 英属开曼群岛商恒景科技股份有限公司 | Signal chain of image system |
| CN102883108A (en) * | 2011-07-11 | 2013-01-16 | 佳能株式会社 | Image processing apparatus and control method for image processing apparatus |
| CN102883108B (en) * | 2011-07-11 | 2015-10-28 | 佳能株式会社 | Picture pick-up device and control method, image processing equipment and method |
| US9491381B2 (en) | 2011-07-11 | 2016-11-08 | Canon Kabushiki Kaisha | Image processing apparatus and control method for image processing apparatus |
| CN103037178A (en) * | 2011-09-30 | 2013-04-10 | 索尼公司 | Image processing apparatus, correcting method, and imaging apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4403873B2 (en) | 2010-01-27 |
| JP2005323041A (en) | 2005-11-17 |
| CN1694507B (en) | 2011-05-25 |
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