CN1163424A - Image forming device - Google Patents
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- CN1163424A CN1163424A CN 97102931 CN97102931A CN1163424A CN 1163424 A CN1163424 A CN 1163424A CN 97102931 CN97102931 CN 97102931 CN 97102931 A CN97102931 A CN 97102931A CN 1163424 A CN1163424 A CN 1163424A
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Abstract
The invention aims to reduce the raw buffers used in the process of processing with (n times n) masking dimension in the filter processing of the image processing device. In an image processing section37, an inputted image from a scanner 1 is modified by a range modifying section 52 through a low-pass filter (LPF) 51. Then, a multiplier 54 is used to multiple the coefficient of parameter K through a high-pass filter (HPF) 53 which is in paralleled connection with the low-pass filter (LPF). Later, an adder 55 is used to add the modified result to the multiplied result. Finally, the image is inputted into a printing section 2 through an enlarging/ reducing section 56, a gama-modifying section 57 and an error variance processing section 58.
Description
The present invention relates to read original image, this image that reads carried out image processing, form visual image forming apparatus such as digital copier on copy paper with image-processing system.
In recent years, image forming apparatus such as digital copier, fax is popularized rapidly and is come.In this digital office machine, the image-processing system of exporting the image usefulness of being imported by scanner in high quality is indispensable.At digital copier, be called in the visual input-output unit of fax, can read the MTF (modulation transfer function of optical system when importing usually, the deterioration of various spatial frequencys such as deterioration in the visualization system and digital distinctive moire can take place in the deterioration of characteristic and follow the frequency band limits that digital sampling produces and the ghost image distortion takes place Modulation TransferFunction) during output.
Therefore in image-processing system, must carry out MTF and revise.This MTF revised be called Filtering Processing, also will be divided into the high-pass filtering (following note is made HPF) at the low-pass filtering (following note is made LPF) that suppresses moire etc. and the edge of outstanding character etc.
In the past, from the overall procedure of image processing, this LPF and HPF were serials, promptly at first the image of importing were carried out LPF and handled, and the scope correcting process, the HPF that revise the contrast of image then handle, and carry out processing one by one so in order.
Usually the Filtering Processing of digital copier in fax etc. is that two-dimensional digital Filtering Processing by main sweep and sub scanning direction realizes.Be Filtering Processing be by to by as the pixel (pixel of being noted) of process object and on every side the regional area that constitutes of pixel multiply by the coefficient corresponding and realize with each pixel location.
Therefore, with (when the mask size of n * n) was handled, the processing of sub scanning direction needed the capable line buffer of n.
, when carrying out Filtering Processing with existing method, owing to carry out serial processing, handle so will carry out LPF, the HPF of (3 * 3), each needs 2 row to amount to the line buffer of 4 row.
As mentioned above, in the Filtering Processing of image-processing system, with (when the mask size of n * n) is handled, the processing of subscan Fang Xiang needs the capable line buffer of n, when carrying out Filtering Processing with method in the past, owing to carry out serial processing, there is LPF, the HPF processing that for example will carry out (3 * 3) and respectively needs 2 row to amount to the problem of 4 line buffers of going.
Therefore, the object of the present invention is to provide a kind of can the minimizing in the Filtering Processing of image-processing system with the (image forming apparatus of the line buffer that uses when the mask size of n * n) is handled.
Image forming apparatus of the present invention comprises: the reading device that reads original image; The picture information that is read by this reading device is carried out the 1st filter processing of Filtering Processing; The 2nd filter processing in parallel with the 1st filter processing, as the picture information that is read by above-mentioned reading device to be carried out Filtering Processing; Adder with the result addition of the result of the 2nd filter processing and above-mentioned the 1st filter processing; According to the image-processing system that carries out various image processings by the result of this adder addition again; And the image processing system that forms image according to the picture information of handling by this image-processing system.
Image forming apparatus of the present invention comprises: the reading device that reads original image; The 1st treating apparatus that comprises the low-pass filtering treatment of the picture information in the specialized range of the pixel of being noted in the picture information that reads by this reading device; The correcting device that the result that the 1st treating apparatus is handled carries out the contrast correction of image; The 2nd treating apparatus that the high-pass filtering of the picture information in the specialized range in parallel with above-mentioned the 1st treating apparatus, as to comprise the pixel of being noted in the picture information that is read by above-mentioned reading device is handled; The result of the 2nd treating apparatus be multiply by the multiplier of predetermined coefficient; Will by this multiplier take advantage of the result and by the adder of above-mentioned correcting device correction result addition; According to the image-processing system that carries out various image processings by the result of this adder addition again; And the image processing system that forms image according to the picture information of handling by this image-processing system.
Image forming method of the present invention is characterised in that: read original image, the low-pass filtering treatment and the high-pass filtering that comprise the picture information in the specialized range of the pixel of being noted in the picture information that reads are concurrently handled, and form image.
Image-processing system of the present invention comprises: the 1st treating apparatus that comprises the Filtering Processing of the picture information in the specialized range of the pixel of being noted in the process object image; The 2nd treating apparatus of the Filtering Processing of the picture information in the specialized range in parallel with the 1st treating apparatus, as to comprise the pixel of being noted in the above-mentioned process object image; And the adder of the results added handled of the result that the 2nd treating apparatus is handled and above-mentioned the 1st treating apparatus.
Image-processing system of the present invention comprises: the 1st treating apparatus that comprises the Filtering Processing of the picture information in the specialized range of the pixel of being noted in the process object image; The correcting device that the result that the 1st treating apparatus is handled carries out the contrast correction of image; The 2nd treating apparatus of the Filtering Processing of the picture information in the specialized range in parallel with above-mentioned the 1st treating apparatus, as to comprise the pixel of being noted in the process object image; The result of the 2nd treating apparatus processing be multiply by the multiplier of predetermined coefficient; And will by this multiplier take advantage of the result and by the adder of above-mentioned correcting device correction result addition.
Image-processing system of the present invention comprises: the 1st line buffer of the picture information of temporary transient storage input; Temporary transient storage is from the 2nd line buffer of the picture information of the 1st line buffer output; According to low-pass filter from the Filtering Processing of the picture information of the 2nd line buffer output and the picture information in the picture information of the picture information of above-mentioned the 1st line buffer output and above-mentioned input comprises the specialized range of the pixel of being noted the process object image; The result of this low-pass filter is carried out the scope correcting device of the contrast correction of image; In parallel with above-mentioned low-pass filter, according to Hi-pass filter from the Filtering Processing of the picture information of above-mentioned the 2nd line buffer output and the picture information in the picture information of the picture information of above-mentioned the 1st line buffer output and above-mentioned input comprises the specialized range of the pixel of being noted the process object image; The result of this high pass filter, processes be multiply by the multiplier of predetermined parameters K; And will by this multiplier take advantage of the result and by the adder of above-mentioned scope correcting device correction result addition.
Image-processing system of the present invention comprises: the 1st line buffer of the picture information of temporary transient storage input; Temporary transient storage is from the 2nd line buffer of the picture information of the 1st line buffer output; According to low-pass filter from the Filtering Processing of the picture information of the 2nd line buffer output and the picture information in the picture information of the picture information of above-mentioned the 1st line buffer output and above-mentioned input comprises the specialized range of the pixel of being noted the process object image; The result of this low-pass filter is carried out the scope correcting device of the contrast correction of image; In parallel with above-mentioned low-pass filter, according to Hi-pass filter from the Filtering Processing of the picture information of above-mentioned the 2nd line buffer output and the picture information in the picture information of the picture information of above-mentioned the 1st line buffer output and above-mentioned input comprises the specialized range of the pixel of being noted the process object image; The result of this high pass filter, processes be multiply by the multiplier of predetermined parameters K; Will by this multiplier take advantage of the result and by the adder of above-mentioned scope correcting device correction result addition; And to the result of this adder addition amplify or dwindle, the image-processing system of image processing such as γ correction, error variance.
Image processing method of the present invention is characterised in that: concurrently the picture information in the specialized range that comprises the pixel of being noted in the picture information that reads is carried out low-pass filtering treatment and high-pass filtering processing.
Fig. 1 is the structured flowchart of the image treatment part in the digital copier of the present invention.
Fig. 2 is the simple structure section figure of the digital copier of image-processing system of the present invention.
Fig. 3 is the simple structural drawing of the control system of the digital copier among Fig. 2.
Fig. 4 is the circuit illustration of the image treatment part among Fig. 1.
Fig. 5 is the figure of the pixel value in regional area in the presentation image data (3 * 3) pixel.
Fig. 6 is the figure of the coefficient of expression low-pass filter.
Fig. 7 is the figure of the coefficient of expression Hi-pass filter.
Fig. 8 is the circuit illustration of existing image treatment part.
Fig. 9 is the image evaluation result of expression when changing the value of parameter K figure.
Figure 10 is the figure of the coefficient of expression LPF and HPF.
Following with reference to description of drawings one embodiment of the invention.
Fig. 2 is the sectional drawing as the inner structure example of the digital copier of the image-processing system of one embodiment of the invention.
That is, digital copier has that to read the scanner section 1 that the pictorial data of original copy O uses and will output to recording materials by the image that this scanner section 1 reads with optical mode be printing portion 2 on the copy paper P.
In scanner section 1, the original copy that should duplicate is placed on the original copy mounting table 3, being placed on the fluorescent light 4 that original copy O on this original copy mounting table 3 is used as the light source that extends along sub scanning direction illuminates, reflected light from the above-mentioned original copy O that is illuminated by this fluorescent light 4 carries out light-to-current inversion by the ccd sensor 5 as the components of photo-electric conversion, and the pictorial data in the above-mentioned reflected light is transformed into picture intelligence.
Disposing the illumination light that makes from this fluorescent light 4 in the side of above-mentioned fluorescent light 4 and effectively focusing on the catoptron of using on the above-mentioned original copy O 6, between above-mentioned fluorescent light 4 and above-mentioned ccd sensor 5, disposing and change a plurality of catoptrons 7,8,9 that the light path promptly passed through from the reflection ray of original copy O from the light of the above-mentioned ccd sensor 5 of above-mentioned original copy O directive uses and above-mentioned reflected light is focused on lens 10 that the caustic surface of above-mentioned ccd sensor 5 uses etc.
To be arranged on the carriage 11,12 from the optical system on the reflection ray guiding ccd sensor 5 of exposure lamp 4 and original copy O, move along main scanning direction with not shown pulse motor.Illuminate the zone of the original copy O of sub scanning direction with fluorescent light 4, move along main scanning direction, illuminate the zone of the sub scanning direction of original copy O successively, so the Zone Full of original copy O is illuminated by fluorescent light 4 by making carriage 11,12.
Disposing the original copy lid 13 that original copy O and original copy mounting table 3 are closely contacted on the top of original copy mounting table 3.The pressing plate of original copy O can be that semi-automatic feed apparatus of original copy or ADF are displacements such as the automatic feed apparatus of original copy with for example SDF according to the size or the duplicating ability of digital copier.
On image formation department, be provided with charged photosensitive roller 14 cylindraceous, rotate, reach simultaneously desirable current potential along desirable direction by not shown motor as printing portion 2.Laser beam irradiation by the potential change in the zone of laser beam irradiation, forms electrostatic latent image on photosensitive roller 14 behind this photosensitive roller 14.
Disposing around this photosensitive roller 14 make photosensitive roller 14 with on the Charging system 15 of desirable current potential; To output to the laser aid 16 on the photosensitive roller 14 according to the laser beam of pictorial data modulation; To supply with visualization agent be toner, make the developing device 17 of the electrostatic latent image developing that is formed on photosensitive roller 14 by the laser beam from this laser aid 16; To be replicated in the recording materials of supplying with from hereinafter described recording materials supply unit by the visual toner image on the photosensitive roller 14 behind these developing device 17 developings and be the copy device 18 on the copy paper P; And with copy paper P from the stripping off device 19 that strips down of photosensitive roller 14.
Above-mentioned laser aid 16 is by constituting with lower member: the semiconductor laser oscillator 24 that laser beam takes place; To be altered to the polygonal mirror 25 of the light beam of per 1 row from the laser beam that this semiconductor laser oscillator 24 is supplied with by not shown collimation lens; To be altered to the f θ lens 26 of directional light from per 1 laser beam of going of polygonal mirror 25; To reflex to the thin catoptron 27 on the above-mentioned photosensitive roller 14 from the directional light of these lens 26; And the catoptron motor 28 that makes above-mentioned polygonal mirror 25 rotations.
Disposing scavenge unit 20 in downstream, be used for the variation elimination of the current potential that remaining toner on the surface with photosensitive roller 14 removes, will be produced by laser beam in order to form next image simultaneously on photosensitive roller 14 along the stripping off device on the sense of rotation of photosensitive roller 14 19.
Between developing device 17 and above-mentioned copy device 18, disposing and to duplicate on the photosensitive roller 14 recording materials that copy paper P that the toner image that forms uses gives above-mentioned copy device 18 and give portion 21.
The direction of separating from above-mentioned photosensitive roller 14 at the copy paper P that has duplicated toner image with copy device 18 is provided with the fixedly fixing device 22 of usefulness of the toner image that makes on this copy paper.Between this fixing device 22 and copy device 18, disposing the conveying device 23 of copy paper P being given these fixing device 22 usefulness.
Fig. 3 is the block diagram of one of control system of the duplicating machine among Fig. 2 example.
In this Fig. 3, the master control part 31 of controlling this digital copier is on the whole connecting the operational part 44 that carries out various computings and is carrying out 4 sub-control portions 32～34 of various controls.
This master control part 31 is also connecting the district management department 36 of the guidance panel 35 that carries out various image processings indication, the visual treatment region of management and the image treatment part 37 as image-processing system of the usefulness such as processing of the editor of the improvement of the image quality of the pictorial data that is taken into, pictorial data, pictorial data, and controls them.
Sub-control portion 32 connecting the light intensity of controlling fluorescent light 4 light source control portion 40, drive paper feeding mechanism shown in Figure 2 etc. mechanical input part mechanism 41 mechanism's drive division 42 and will become the A/D transformation component 43 of digital data signal by the simulated image data conversion of ccd sensor 5 conversion that are transformed into pictorial data behind the detection of reflected light, and control them.
Sub-control portion 33 is connecting that pictorial data after will editing or process in order to form image is launched and the image expansion portion 45 of storage, will be from the pictorial data (from the pictorial data of scanner section 1) of image expansion portion 45 as laser modulation signal and mechanism's drive division 49 of the efferent mechanism 48 of drive systems such as motor in the visual efferent 46 of output pulse signal (pictorial data of printing portion 2 usefulness) and the driving laser device 16 and solenoid etc., and control them.
Sub-control portion 34 is connecting data transmitting and receiving portion 50, the transceiver of the data of carrying out between control and the external mechanical.
In above-mentioned digital copier, illuminate original copy O with fluorescent light 4, on ccd sensor 5, and be transformed into analog electrical signal from the light imaging of this original copy O reflection.This analog picture signal is transformed into digital signal by A/D transformation component 43, exports to image treatment part 37.
In this image treatment part 37, carry out from the Filtering Processing of the pictorial data of scanner section 1, the amplification of main scanning direction/dwindle processing, level processing etc.
Fig. 1 shows the inner structure as the image treatment part 37 of image-processing system.
Fig. 4 be constitute image treatment part 37 shown in Figure 1 carry out the circuit example of mask size for the processing of LPF51, the HPF52 of (3 * 3).Data used herein all are 8.
That is, be provided with line buffer (LD1) 61 and line buffer (LD2) 62 these two line buffers that are taken into pictorial data from scanner section 1 in the image treatment part 37 of (3 * 3) in mask size.Scope correction portion 52 is connecting the scope correction benchmark modified value calculating part 60 of calculating scope correction benchmark modified value according to from the pictorial data of scanner section 1.
Secondly, with the mask size as shown in Figure 4 that constitutes like this be the processing action of the circuit example explanation image treatment part 37 of the present invention of (3 * 3).
At first, the pictorial data from scanner section 1 input temporarily is taken into line buffer 61,62.
As shown in Figure 5, be assumed to be from the pixel value in regional area (3 * 3) pixel in the pictorial data of the time clock input synchronously of the regulation of this line buffer 61,62 f (i-1, j-1), f (i, j-1), f (i+1, j-1), f (i-1, j), f (i, j), f (i+1, j), f (i-1, j+1), f (i, j+1), f (i+1, j+1), then (i, (i j) can be represented by the formula the result l of LPF51 j) as the pixel f that is noted.
I(i，j)＝La
*f(i，j)+Lb
*[f(i，j-1)+f(i，j+1)]+Lc
*[f(i-1，j)+f(i+1，j)]+Ld
*[f(i-1，j-1)+f(i+1，j-1)+f(i-1，j+1)+f(i+1，j+1)]
Coefficient La, Lb in this formula, Lc, Ld are the coefficients of the LPF51 of (3 * 3) shown in Figure 6, in order not change local average concentration before and after treatment, must have following condition.
La+2
*Lb+2
*Lc+4
*Ld＝1
Secondly, for the result who is handled by LPF51 is carried out the contrast correction of image, and carry out the scope correcting process with scope correction portion 52, establish this value and be r (i, j).
Carry out the processing of HPF53 concurrently with the processing of LPF51 and the scope correcting process of scope correction portion 52.The processing of HPF53 is the same with the processing of LPF51, be by being taken into the value f (i-1 in regional area (3 * 3) pixel in the input imagery in the impact damper 61,62, j-1), f (i, j-1), f (i+1, j-1), f (i-1, j), f (i, j), f (i+1, j), f (i-1, j+1), f (i, j+1), f (i+1, j+1) and coefficient Ha, Hb, Hc, Hd multiply each other and carry out.
Specifically, (i, (i j) can be represented by the formula the result h of HPF53 j) the pixel f that is noted.
h(i，j)＝Ha
*f(i，j)+Hb
*[f(i，j-1)+f(i，j+1)]+Hc
*[f(i-1，j)+f(i+1，j)]+Hd
*[f(i-1，j-1)+f(i+1，j-1)+f(i-1，j+1)+f(i+1，j+1)]
Coefficient Ha, the Hb of HPF53, the configuration mode of Hc, Hd are as shown in Figure 7.Multiply by parameter K by result, can change the intensity of projecting edge HPF53.That is, this coefficient value is big more, and the degree that the edge is given prominence to is strong more, so can be according to the setting optimum values such as MTF characteristic of scanner section 1.
Check the result of such parallel computation according to following formula, to this as a result f (i j) carries out amplification shown in Figure 1/dwindle and handle following processing, prints output.
f(i，j)＝r(i，j)+h(i，j)×K
If adopt the method for above explanation, then, can realize the Filtering Processing of mask size (3 * 3) pixel by the impact damper of 2 row is set.
By the way, when carrying out processing shown in Figure 8 by existing method, for the scope correction result is carried out the processing of HPF53, must have temporary transient input range correction result line buffer 63,64 2 row and be taken at first the line buffers that amount to 4 row by 2 row of the line buffer 61,62 of the image of scanner section 1 input.
Different therewith, in the present invention,, line buffer can be reduced by 2 row by carrying out the processing of LPF51 and HPF53 concurrently.
In the past, after the processing of the processing of the image of importing being carried out LPF51, scope correction portion 52, again this result was carried out the processing of HPF51, different therewith, in the present invention because the image of input is carried out the processing of HPF53, thus compared with the past, strengthened the degree of projecting edge.Its result is with the right moire that takes place easily, but the parameter K of the intensity by setting the only processing that can change HPF53 can do with above-mentioned interference.
Fig. 9 is the image evaluation result of expression when changing the value of parameter K.In existing method during K=I.3, the repeatability of small character and to suppress moire all good, and in the present invention during K=I.3, obtain very strong projecting edge, when the value of making drops to K=0.6, also can obtain and identical in the past image, this point is identified by simulation.
Under situation of the present invention, corresponding to the variation of parameter K value, the variation of image is slightly larger, so need must be than thin in the past with the precision set of parameter K.
LPF51 in the present embodiment has used the coefficient shown in Figure 10 (a), and HPF53 has used the coefficient shown in Figure 10 (b).
Illustrated that from the repeatability of small character and the viewpoint of inhibition moire parameter K preferably adopts the value of K=0.6, but along with the different coefficient of selecting above-mentioned LPF51, HPF53, the K value changes more or less also.
For example, when the coefficient that makes HPF53 changes shown in Figure 10 (c) like that, because than more having given prominence to the edge in the foregoing description, so the suitable value of parameter K becomes lower.Therefore, must select the suitable value of parameter K accordingly with the value of the coefficient of LPF51, HPF53.
The situation of mask size (3 * 3) has been described in an embodiment, but size is not limited to (3 * 3), this size can freely be set.Usually when mask size be that (during n * n), line buffer needs n-1 capable, is that original half is just much of that.
In addition, the configuration of coefficient is not subjected to the restriction of present embodiment yet, can change the whole coefficient values in the mask size.
As mentioned above, if adopt embodiments of the invention, then LPF handles and HPF handles by the input imagery from scanner is carried out concurrently, can reduce line storage.
In addition, aspect image quality, the value optimization of the parameter K by making HPF can obtain image same.
As mentioned above, if adopt the present invention, then can provide a kind of usefulness (line buffer of using when the mask size of n * n) is handled that in the Filtering Processing of image-processing system, can reduce.
Claims (8)
1. an image forming apparatus is characterized in that comprising: the reading device that reads original image; The picture information that is read by this reading device is carried out the 1st filter processing of Filtering Processing; The 2nd filter processing in parallel with the 1st filter processing, as the picture information that is read by above-mentioned reading device to be carried out Filtering Processing; Adder with the result addition of the result of the 2nd filter processing and above-mentioned the 1st filter processing; According to the image-processing system that carries out various image processings by the result of this adder addition again; And the image processing system that forms image according to the picture information of handling by this image-processing system.
2. an image forming apparatus is characterized in that comprising: the reading device that reads original image; The 1st treating apparatus that comprises the low-pass filtering treatment of the picture information in the specialized range of the pixel of being noted in the picture information that reads by this reading device; The correcting device that the result that the 1st treating apparatus is handled carries out the contrast correction of image; The 2nd treating apparatus that the high-pass filtering of the picture information in the specialized range in parallel with above-mentioned the 1st treating apparatus, as to comprise the pixel of being noted in the picture information that is read by above-mentioned reading device is handled; The result of the 2nd treating apparatus be multiply by the multiplier of predetermined coefficient; Will by this multiplier take advantage of the result and by the adder of above-mentioned correcting device correction result addition; According to the image-processing system that carries out various image processings by the result of this adder addition again; And the image processing system that forms image according to the picture information of handling by this image-processing system.
3. image forming method is characterized in that following steps: read original image, the low-pass filtering treatment and the high-pass filtering that comprise the picture information in the specialized range of the pixel of being noted in the picture information that reads are concurrently handled, and form image.
4. image-processing system is characterized in that comprising: the 1st treating apparatus that comprises the Filtering Processing of the picture information in the specialized range of the pixel of being noted in the process object image; The 2nd treating apparatus of the Filtering Processing of the picture information in the specialized range in parallel with the 1st treating apparatus, as to comprise the pixel of being noted in the above-mentioned process object image; And the adder of the results added handled of the result that the 2nd treating apparatus is handled and above-mentioned the 1st treating apparatus.
5. image-processing system is characterized in that comprising: the 1st treating apparatus that comprises the Filtering Processing of the picture information in the specialized range of the pixel of being noted in the process object image; The correcting device that the result that the 1st treating apparatus is handled carries out the contrast correction of image; The 2nd treating apparatus of the Filtering Processing of the picture information in the specialized range in parallel with above-mentioned the 1st treating apparatus, as to comprise the pixel of being noted in the process object image; The result of the 2nd treating apparatus processing be multiply by the multiplier of predetermined coefficient; And will by this multiplier take advantage of the result and by the adder of above-mentioned correcting device correction result addition.
6. an image-processing system is characterized in that comprising: the 1st line buffer of the picture information of temporary transient storage input; Temporary transient storage is from the 2nd line buffer of the picture information of the 1st line buffer output; According to low-pass filter from the Filtering Processing of the picture information of the 2nd line buffer output and the picture information in the picture information of the picture information of above-mentioned the 1st line buffer output and above-mentioned input comprises the specialized range of the pixel of being noted the process object image; The result of this low-pass filter is carried out the scope correcting device of the contrast correction of image; In parallel with above-mentioned low-pass filter, according to Hi-pass filter from the Filtering Processing of the picture information of above-mentioned the 2nd line buffer output and the picture information in the picture information of the picture information of above-mentioned the 1st line buffer output and above-mentioned input comprises the specialized range of the pixel of being noted the process object image; The result of this high pass filter, processes be multiply by the multiplier of predetermined parameters K; And will by this multiplier take advantage of the result and by the adder of above-mentioned scope correcting device correction result addition.
7. an image-processing system is characterized in that comprising: the 1st line buffer of the picture information of temporary transient storage input; Temporary transient storage is from the 2nd line buffer of the picture information of the 1st line buffer output; According to low-pass filter from the Filtering Processing of the picture information of the 2nd line buffer output and the picture information in the picture information of the picture information of above-mentioned the 1st line buffer output and above-mentioned input comprises the specialized range of the pixel of being noted the process object image; The result of this low-pass filter is carried out the scope correcting device of the contrast correction of image; In parallel with above-mentioned low-pass filter, according to Hi-pass filter from the Filtering Processing of the picture information of above-mentioned the 2nd line buffer output and the picture information in the picture information of the picture information of above-mentioned the 1st line buffer output and above-mentioned input comprises the specialized range of the pixel of being noted the process object image; The result of this high pass filter, processes be multiply by the multiplier of predetermined parameters K; Will by this multiplier take advantage of the result and by the adder of above-mentioned scope correcting device correction result addition; And to the result of this adder addition amplify or dwindle, the image-processing system of image processing such as γ correction, error variance.
8. an image processing method is characterized in that following steps: concurrently the picture information in the specialized range that comprises the pixel of being noted in the picture information that reads is carried out low-pass filtering treatment and high-pass filtering processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97102931 CN1163424A (en) | 1996-03-22 | 1997-03-04 | Image forming device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP066424/96 | 1996-03-22 | ||
| CN 97102931 CN1163424A (en) | 1996-03-22 | 1997-03-04 | Image forming device |
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| CN1163424A true CN1163424A (en) | 1997-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97102931 Pending CN1163424A (en) | 1996-03-22 | 1997-03-04 | Image forming device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293514C (en) * | 2004-07-08 | 2007-01-03 | 北京中星微电子有限公司 | Pantograph treatment system of digital picture |
-
1997
- 1997-03-04 CN CN 97102931 patent/CN1163424A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293514C (en) * | 2004-07-08 | 2007-01-03 | 北京中星微电子有限公司 | Pantograph treatment system of digital picture |
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