CN100499825C - Method and system for eliminating chromatic noise produced by interpolation - Google Patents

Method and system for eliminating chromatic noise produced by interpolation Download PDF

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CN100499825C
CN100499825C CN 200510098490 CN200510098490A CN100499825C CN 100499825 C CN100499825 C CN 100499825C CN 200510098490 CN200510098490 CN 200510098490 CN 200510098490 A CN200510098490 A CN 200510098490A CN 100499825 C CN100499825 C CN 100499825C
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signal
color difference
pixel
color
green
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CN1929620A (en )
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吴政育
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凌阳科技股份有限公司
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Abstract

本发明提出一种消除由内插产生的彩色噪声的方法及系统,其先将影像感测装置所捕获的贝尔形式影像,利用补点方法还原出每一像素所对应的红、绿及蓝三色。 The present invention provides a method and system for color interpolation noise generated in the elimination of which form Bell first image captured by the image sensing apparatus, the method of using the patch point reduction out of red, green and blue corresponding to each pixel color. 再将此影像转换到色差领域,并即时利用已做彩色噪声消除处理的像素点的色差值更新二维3×3中值滤波器中的色差像素值,以提高中值滤波器过滤彩色噪声的能力。 Then convert this image to the field of color, the color has been done using the instant the noise canceling point pixel value updating processing of color pixel color values ​​in the 3 × 3 two-dimensional median filter, the median filter to increase the color noise filter Ability. 最后以一低通滤波器,以进一步消除中值滤波器所过滤出的成簇彩色噪声中不均匀的现象。 Finally, a low-pass filter, a median filter to further eliminate the filtered noise clustering phenomenon of uneven color.

Description

消除由内插产生的彩色噪声的方法及系统 Elimination of the color produced by the interpolation method and system noise

技术领域 FIELD

本发明涉及影像处理技术领域,尤其涉及一种消除由内插产生的彩色噪声的方法及系统。 The present invention relates to image processing technology, and in particular, to a method and system for eliminating the color noise generated by the interpolation.

背景技术 Background technique

彩色影像处理系统主要由一影像捕获单元、一影像还原及处理单元、一影像显示单元及一影像压缩单元所组成。 Color image processing system consists of an image capture unit, and an image reduction process unit, a constituent unit of the image display and an image compression unit. 影像捕获单元由影像感测装置(image sensor)所构成。 The image capturing unit is constituted by an image sensing device (image sensor). 其是由多个光电二极管(photo-diodes)所组成二维阵列的感光元件,并配合色彩滤波阵列(color filter array),使得每一像素获得单一色彩值。 Which is a two-dimensional array of photosensitive elements of a plurality of photodiodes (photo-diodes) are composed, and with the color filter array (color filter array), so that a single color value for each pixel is obtained. 影像还原及处理单元即是将每一像素经过内插(interpolation)处理,以还原出一像素的红、蓝及绿色颜色值。 And image restoration processing unit that is subjected to the interpolation of each pixel (interpolation) process to restore a pixel of red, blue and green color values. 由于在内插还原的过程中,伴随影像在黑白交界处常会产生明显的彩色色斑。 Since the reduction of the inner interpolation process, the image often accompanied by noticeable color in the black and white spots at the junction. 另外在影像感测装置捕获原始影像数据时,一般都无法避免会含有噪声(noise)存在,同时内插还原的过程中也会造成此噪声在邻近像素间扩散。 Also in the image sensing device captures original image data, they are generally unable to avoid contain noise (Noise) exists, while the interpolation process in the reduction of this noise will cause diffusion between adjacent pixels.

由于中值滤■波器在去除噪声同时,也能保有边缘信息(edge information),使影像不会产生模糊的现象。 Since the median filter ■ wave, but also can retain the edge information (edge ​​information) removing noise in the image blurring does not occur. 美国第USP5,778,106号专利案公告中,利用中值滤波器(median filter)对RG与BG进行消除彩色噪声处理。 U.S. Patent No. USP5,778,106 bulletin case, the median filter (median filter) to the RG and BG color noise elimination processing for utilization. 然而,由于内插还原所产生的彩色噪声是以成簇的形式出现,若使用范围小(如3 X 3)的二维中值滤波器,会无法有效地滤除彩色噪声,若使用范围大(如7x7或9x9)的二维中值滤波器,虽可滤除彩色噪声,但却增加许多成本。 However, since the interpolation color noise reduction is produced in the form of clusters, by using a small range (e.g., 3 X 3) a two-dimensional median filter will not effectively filter out color noise, when using a large range (e.g. 7x7 or 9x9) median filter in two dimensions, although the color noise can be filtered out, but many of the costs increase. 故已知消除由内插产生的彩色噪声的方法及系统仍有改善空间。 Therefore, known methods and systems eliminate color noise generated in the interpolation is still room for improvement.

发明内容 SUMMARY

本发明的目的是提供一种消除由内插产生的彩色噪声的方法及系统,以解决内插还原时所产生的成簇彩色噪声的问题,同时降低已知二维中值滤波器成本。 Object of the present invention is to provide a method and system interpolated color noise generated by the elimination of problems in clusters when the color noise reduced and the resulting interpolated solution, while reducing the cost of the known two dimensional median filter.

依据本发明的一个特色,提出一种消除由内插产生的彩色噪声的方法,以消除数字影像中内插时所产生的彩色噪声,该方法包含下列步骤:(八海收该数字影像中的一像素及邻近像素;(B)将该像素及邻近像素分别补点成各自具有红色、绿色及蓝色信号;(C)依据该像素的红色、绿色及蓝色信号,产生该像素的第一色差信号及第二色差信号,依据邻近像素的红色、绿色及蓝色信号,产生邻近像素的第一色差信号及第二色差信号;(D)依据该像素的第一色差信号及第二色差信号、邻近像素的第一色差信号及第二色差信号、邻近像素的第一校正色差信号及第二校正色差信号进行滤波处理,产生该像素的第一滤波色差信号及第二滤波色差信号;(E)^据该像素的第一滤波色差信号、第二滤波色差信号及绿色信号,计算该像素的校正红色信号、校正绿色信号及校正 According to one feature of the invention, a method of interpolating color noise generated in the elimination to eliminate the color interpolation noise generated in the digital image, the method comprising the steps of receiving :( eight sea in the digital image a pixel and neighboring pixels; (B) pixel and the pixels adjacent to each patch point respectively having red, green and blue signals; (C) based on red, green and blue signals of the pixel, the first pixel is generated color difference signal and second color difference signals, according to the red, green and blue signals of adjacent pixels, the adjacent pixels to produce a first color difference signal and second color difference signals; (D) according to the pixel of the first color difference signal and second color difference signals , adjacent to the first pixel and the second color difference signal chrominance signal, a first color difference signal correction neighboring pixels and a second color difference signal correction filter processing is performed, to generate the color pixels in the first signal and the second filtered chrominance signal filtering; (E ) ^ filtered color difference signal according to the first pixel, the second filtered signal and green color signal, calculates a correction signal of the red pixel, a green correction signal, and correction 色信号;(F)依据该像素的校正红色信号、校正绿色信号及校正蓝色信号,产生该像素的第一校正色差信号及第二校正色差信号;(G)重复上述步骤,直至处理完该数字影像的所有像素。 Color signal; (F.) According to the correction signal of the red pixel, a green correction signal, and a blue correction signal to generate a first correction and a color difference signal of the pixel of the second color difference signal correction; (G) repeating the above steps until the processed All the pixels of digital images.

依据本发明的另一特色,提出一种消除由内插产生的彩色嗓声的系统,以消除數字影像中内插时所产生的彩色噪声,该系统包含一补点装置、一色差产生装置、一滤波装置、一校正装置及一更新装置。 According to another feature of the invention there is provided for eliminating the color generated by the interpolation throat sound system, to eliminate the color interpolation noise generated in the digital image, the system comprising a patch point apparatus, a color difference generating means, a filter device, a calibration device and a updating means. 该补点装置接收该数字影像中的一f象素及邻近像素,将该像素及邻近像素分别补点成各自具有红色、绿色及蓝色信号;该色差产生装置棘合到该补点装置,依据该像素的红色、绿色及蓝色信号,产生该像素的第一色差信号及第二色差信号,依据邻近像素的红色、绿色及蓝色信号,产生邻近像素的第一色差信号及第二色差信号;该滤波装置搞合到该色差产生装置,以将该像素的第一色差信号、第二色差信号、邻近像素点的第一色差信号及第二色差信号、邻近像素点的第一校正色差信号及第二^正色差信号进行滤波处理,以产生该像素的第一滤波色差信号及第二滤波色差信号;该校正装置搞合到该补点装置及滤波装置,依据该像素的第一滤波色差信号、第二德波色差信号及绿色信号,计算该像素的校正红色信号、校正绿色信号及校正蓝色信号;该更新 The patch point device receives the digital image in a pixel and neighboring pixels f, and the pixel of pixels adjacent to each patch point having red, green and blue signals; means the chromatic aberration generated up to that point engaged ratchet means, based on red, green and blue signals of the pixels, a first color difference signal and generating a second color difference signal of the pixel, based on red, green and blue signals of adjacent pixels, the adjacent pixels to produce a first color difference signal and a second color signal; filter means to engage the engagement means to the color difference to the pixels of the first color difference signal, a second color difference signal, color difference signal adjacent to the first pixel and the second color difference signal, adjacent to the first pixel color correction ^ n color difference signal and the second signal to filtering processing, to generate the first pixel of the filtered signal and the second filtered chrominance color difference signals; correcting means to engage the engagement means and the filtering means patch point, according to the first filtering of the pixel color difference signal, color difference signal and a second Depo green signal, calculates a correction signal of the red pixel, a green correction signal, and a blue correction signal; the update 置搞合到该校正装置,以产生该像素的第一校正色差信号及第二校正色差信号。 Engage opposing bonded to the correction means to produce corrected color difference signal of the first pixel and the second corrected color difference signals.

由上可知,本发明将影像信号转换到色差色域,并利用先前已执行过彩色噪声消除处理的像素点的色差值取代原色差值,因此在采用范围小((如3x3))的低成本的中值滤波器时,可以提高滤波器消除成簇的彩色噪声区決的能力。 From the above, the present invention converts a video signal to the color gamut, and color noise by using a color difference value of the previous pixel has already been performed to eliminate substituted primary color difference processing, and therefore low in a small range ((such as 3x3)) of when the cost of the median filter, may improve the ability of the color filter to eliminate noise clusters in decision region. 进一步地,还可以再结合一低通滤波器,以进一步消除中值滤波器所过滤出的成簇彩色噪声不均匀的现象。 Further, it may also be combined with a low-pass filter, a median filter to further eliminate the noise filtered out phenomenon of uneven color clusters.

附图说明 BRIEF DESCRIPTION

图I是本发明的消除由内插产生的彩色噪声的系统的方框图。 Figure I is a block diagram of the system of the color noise generated by the interpolation of the present invention to eliminate.

图2是本发明的彩色贝尔形式影像的补点示意图。 FIG 2 is a schematic complement Bell dot color image of the present invention form.

图3是本发明的色差产生装置的电路图。 FIG 3 is a circuit diagram of the present invention, a color difference generating device.

图4是本发明的滤波装置的方框图。 FIG 4 is a block diagram of the filter device according to the present invention.

图5A〜B是本发明的中值滤波器的输入数据的示意图。 FIG 5A~B median filter is a schematic diagram of the input data according to the present invention.

图6A〜E是本发明中值滤波器执行过程的示意图。 FIG 6A~E is a schematic diagram of a median filter process performed in the present invention.

图7是本发明校正装置的方框图。 FIG 7 is a block diagram of the calibration apparatus of the present invention.

具体实施方式 detailed description

有关本发明的较佳实施例说明,请参考图I所示的方框图。 For the preferred embodiment of the present invention, please reference to a block diagram shown in FIG. I. 其用于消除数字影像中内插时所产生的彩色噪声,以产生一像素(/,力的校正红色信号(Ac)、校正绿色信号(Ge)及校正蓝色信号(5c),该数字影像为一贝尔(bayer)形式影像。该系统包含一补点装置110、一色差产生装置120、一滤波装置130、一校正装置140及一更新装置150。 For eliminating the color noise in a digital image interpolation is generated, to generate a pixel (/, force correcting red signal (Ac), a green correction signal (Ge), and a blue correction signal (5C), said digital image is a Bell (Bayer) in the form of an image. the system comprises a patch point 110, a color difference generating means 120, a filter 130, a correcting means 140, and an updating means 150.

补点装置110接收该数字影像中的像素(z_J)及邻近像素,将该像素(i,j)补点成具有红、绿及蓝三色信号。 Up point device 110 receives the digital image in pixels (z_J) and neighboring pixels, the pixel (i, j) up to a point having red, green and blue signals. 图2是一彩色贝尔形式影像的补点示意图。 FIG 2 is a schematic view point up Bell form a color image. 像素的排列方式是以一排GRGRGR,一排BGBGBG交互排列形成。 Arrangement is based on a pixel row GRGRGR, arranged to form a row of BGBGBG interaction. 像素(/,刀仅为红色、绿色或蓝色其中之一的色彩值。故需在补点装置110中,利用补点的方法为像素(i, j)重建不存在的其他色彩值。 Pixels (/, a knife only red, green or blue color value of one. So be supplemented point device 110, using the method up at pixel (i, j) reconstruction of other color values ​​that do not exist.

色差产生装置120耦合到该补点装置110,依据该像素(i,j)的红、绿及蓝三色信号,产生一第一色差信号U'(i?-G)及一第二色差信号V'(BG)。 A color difference generating means 120 is coupled to the patch point device 110, according to the pixel (i, j) red, green and blue signals, a first color difference signal U '(i? -G) and a second color difference signal V '(BG). 图3是色差产生装置120的电路图,其包!令第一减法器121及一第二减法器122。 FIG 3 is a circuit diagram of a color difference generating means 120, which package! Enable the first subtracter 121 and a second subtractor 122. 第一减法器121的第一输入端接收该像素(/,/)的红色信号,其第二输入端接收该像素的绿色信号,并将该像素(f, j)的红色信号值减去绿色信号值,产生该第一色差信号(及-C)。 A first input of a first subtracter 121 receives the pixel (/, /) of a red signal, a second input for receiving the pixel signal of a green, a red and a green signal by subtracting the pixel values ​​(f, j) is signal value, to generate the first color difference signal (and -C). 第二减法器122将该像素的蓝色信号值减去绿色信号值,产生该第二色差信号(5-G)。 Blue signal value of the second subtracter 122 subtracts the pixel value of the green signal, generate the second color difference signal (5-G). 滤波装置130耦合到该色差产生装置120,以将该第一色差信号U' (尺-G)及第二色差信号V,(5 - G)进行滤波处理,使产生一第一滤波色差信号F(尺-G)及一第二滤波色差信号FC8-C;)。 Filtering means 130 is coupled to the color difference generating means 120 to the first color difference signal U '(ft -G) and the second color difference signal V, (5 - G) filtering process that generates a first filtered chrominance signal F (ft -G) and a second color difference signal filtering FC8-C;). 图4是滤波装置130的方框图,其包含一第一中值滤波器(median filter)410、一第一低通滤波器420、一第二中值滤波器430及一第二低通滤波器440。 FIG 4 is a block diagram of the filter device 130, which comprises a first median filter (median filter) 410, a first low-pass filter 420, a second median filter 430 and a second low-pass filter 440 .

第一中值滤波器410将该第一色差信号(及-G)进行中值滤波处理。 First median filter 410. The first color difference signal (and -G) median filtering process. 第一中值滤波器410的一端接收第一色差信号(及-G),另一端接收一第一校正色差信号(如-Ge)。 A first median filter 410 receives an end of a first color difference signal (and -G), and the other end receiving a first color difference signal correction (e.g., -Ge). 如图5A所示,第一中值滤波器410利用先前已做过彩色噪声消除处理的像素点的色差值(Re - Ge)取代原来的色差值。 , The first median filter 410 using the previously has been done to eliminate color noise in FIG. 5A color pixel value processing (Re - Ge) to replace the original color value. 第一中值滤波器410是将像素(hj)及邻近像素的第一色差信号(R - G)及第一校正色差信号(Re -Ge)由小到大排列。 The median filter 410 is a first pixel (HJ) and a first adjacent pixel color-difference signal (R - G) color difference signal and a first correction (Re -Ge) in ascending order. 例如:像素(i, j)及邻近像素的第一色差信号(及-G)及第一校正色差信号Ge)分别为{135、140、163、157、160、155、150、142、140},经由该第一中值滤波器410处理后,则产生{135、 140、 140、 142、 150、 155、 157、 160、 163}。 For example: first color difference signal of the pixel (i, j) and the neighboring pixels (and -G), and a first color difference signal correction Ge)} are {135,140,163,157,160,155,150,142,140 , the first through the median filter process 410 is generated {135, 140, 140, 142, 150, 155, 157, 160, 163}.

第一低通滤波器420耦合至该第一中值滤波器410,将经中值滤■波的信号进行低通滤波处理,产生第一滤波色差信号F(i?-G)。 A first low-pass filter 420 is coupled to the first median filter 410, the low pass filtering process by the median filter ■ signal wave, generating a first filtered chrominance signal F (i? -G). 第一低通滤波器 A first low-pass filter

420的系数可为 420 coefficients may be

. 也就是,第一中值滤波器410处理后的结果 That is, the first median filter processing result 410

{135、140、140、142、150、155、157、160、163},再经过第一低通滤波器420处理,所产生第一滤波色差信号G)值为: 135,140,140,142,150,155,157,160,163 {}, then after a first low-pass filter processing 420, the first filtered chrominance signal G) is generated:

{140xl + 142x4 + 150x6 + 155x4 + 157xl}/16。 {140xl + 142x4 + 150x6 + 155x4 + 157xl} / 16.

第二中值滤波器430将该第二色差信号(5-G)进行中值滤波处理。 The second median filter 430 second color difference signal (5-G) median filtering process. 如图5B所示,第二中值滤波器430利用先前已做过彩色噪声消除处理的像素点的色差值(价-Ge)取代原来的色差值。 5B, the second median filter 430 has previously been done by using a color difference color noise elimination processing pixel value (price -Ge) to replace the original color value. 第二低通滤波器440耦合到该第二中值滤波器430,将经中值滤波的信号进行低通滤波处理,产生第二滤波色差信号G)。 A second low-pass filter 440 is coupled to the second median filter 430, the low pass filtering process by the median filtered signal, generating a second filtered color difference signal G).

图6A〜6E是本发明中值滤波器执行过程的示意图。 FIG 6A~6E is a schematic diagram of a median filter process performed in the present invention. 首先,在图6A中对行方向进行由小到大排列。 First, the arrangement of the ascending row direction in FIG. 6A. 例如,第二行{157、160、155}经过处理后为{155、157、160}。 For example, the second row {157,160,155} {155,157,160 after treatment was}. 其次,在图6B中对列方向进行由小到大排列。 Secondly, the arrangement of ascending in the column direction in FIG. 6B. 例如,第一列{135、155、140}经过处理后为{135、140、155}。 For example, the first column {135,155,140} {135,140,155 after treatment was}. 在图6C中将对角线方向元素进行由小到大排列。 It is arranged in diagonal ascending direction element in the FIG. 6C. 对角线{150、142、155}经过处理后为{142、150、155}。 Diagonal {150,142,155} {142,150,155 after treatment was}. 在图6D中对{Z2、Z3、Z4}及{Z6、Z7、Z8}进行由小到大排列。 To {Z2, Z3, Z4} and {Z6, Z7, Z8} arranged in ascending performed in Figure 6D. 由于{140'140、142}及{155、157、160}均已经由小到大排列,因此没有变化。 Since 140'140,142 {155,157,160} and {} are already small to large order, so no changes. 由于本发明低通滤、波器的系数,故如图6E所示,仅需使用 Since the low-pass filter, the coefficient of the wave of the present invention, it is shown in Figure 6E, only the use of

{ Z max、Z rnin、median、max、Z min {Z max, Z rnin, median, max, Z min

}。 }. 本发明的中值滤波器仅需执行27次的比较即可完成,远比已知中值滤波器需执行36次的比较更为迅速。 Median filter according to the present invention performs only 27 times to complete the comparison, the known median filter than comparison needs to be performed 36 times faster.

校正装置140耦合至该补点装置110及滤波装置130,依据该第一滤波色差信号芦(及-(7)、第二滤波色差信号F(5-G)及绿色信号,计算该像素(/,))的校正红色信号、校正绿色信号(Ge)及校正蓝色信号(6c)。 Correction means 140 is coupled to the patch point device 110 and filter device 130 according to the first filtered chrominance signal Lo (and - (7), a second filtered chrominance signal F (5-G) and a green signal, calculates the pixel (/ ,)) corrected red signal, a green signal correction (Ge) and blue correction signal (6c). 图7是校正装置140的方框图。 FIG 7 is a block diagram of the correcting device 140. 其包含一第一加法器710及一第二加法器720。 Which comprises a first adder 710, and a second adder 720. 第一加法器710将该第一滤波色差信号尸⑶-G)及补点装置110所产生的绿色信号(G)相力口,以产生该校正红色信号(Ac)。 Green signal (G) a first adder 710 the first filtered chrominance signal dead ⑶-G) and complement points generated by the device port 110 with a force, to produce a red correction signal (Ac). 第二加法器720将该第二滤波色差信号F(5-G)及补点装置110所产生的绿色信号(G)相加,以产生该校正蓝色信号(及O。校正装置140直接依据补点装置110所产生的绿色信号(G),产生像素(i,j)的校正绿色信号(Ge)。 The second adder 720 of the second filtered chrominance signal F (5-G) and a green signal (G) generated by means of the patch point 110 summed to produce the correction signal 140 blue direct basis (calibration apparatus and O. green signal (G) generated patch point device 110 generates the pixel (i, j) in the green correction signal (Ge).

更新装置150耦合至该校正装置140,接收校正蓝色信号(及0、校正红色信号(Re)及校正绿色信号(Ge),以产生该第一校正色差信号(Re - Ge)及第二校正色差信号(价-Ge)。 Updating means 150 is coupled to the correction means 140 receives the corrected blue signals (0 and, a red correction signal (Re) and a green correction signal (Ge), to generate the first corrected color difference signals (Re - Ge) and a second correction color difference signal (monovalent -Ge).

本发明利用将影像信号转换到色差色域,并即时更新二维3x3中值滤波器中的色差像素值,亦即利用先前已执行过彩色噪声消除处理的像素点的色差值{(办-Ge)、(价-Ge)}取代原色差值。 The present invention uses an image signal to convert the color gamut, chroma pixel values ​​and immediate updating 3x3 two-dimensional median filters, i.e., the use of color has been previously executed a color noise elimination processing pixels {(do - Ge), (monovalent -Ge)} substituted primary color difference. 因此,在每3x3的范围中,使得9个色差像素值中有4个色差像素值已完成彩色嗓声消除处理,对成嚴的彩色噪声区块,提高中值滤波器过滤彩色嗓声的能力。 Thus, the range of each of 3x3, nine chrominance pixel values ​​such that there are four chroma pixel color values ​​has been completed to eliminate voice sound processing, the block noise into a strict color, improve the ability of the median filter color filter of voice sound . 同时结合一低通滤波器,以进一步消除中值滤波器所过滤出的成簇彩色噪声不均匀的现象。 Combined with a low-pass filter, a median filter to further eliminate the noise filtered out phenomenon of uneven color clusters.

上述较佳具体实施例仅是为了方便说明而举例,本发明所主张的权利范围自应以权利要求所述为准,而非仅限于上述实施例。 Specific examples of the above-described preferred embodiments are merely for convenience of explanation and example, the scope of the present invention as claimed in claim from claim should prevail, not limited to the above embodiments.

Claims (15)

  1. 1、一种消除由内插产生的彩色噪声的方法,用于消除一数字影像中内插时所产生的彩色噪声,该方法包含下列步骤: (A)接收该数字影像中的一像素及邻近像素; (B)将该像素及邻近像素分别补点成各自具有红色、绿色及蓝色信号; (C)依据该像素的红色、绿色及蓝色信号,产生该像素的第一色差信号及第二色差信号,依据邻近像素的红色、绿色及蓝色信号,产生邻近像素的第一色差信号及第二色差信号; (D)依据该像素的第一色差信号及第二色差信号、邻近像素的第一色差信号及第二色差信号、邻近像素的第一校正色差信号及第二校正色差信号进行滤波处理,产生该像素的第一滤波色差信号及第二滤波色差信号; (E)依据该像素的第一滤波色差信号、第二滤波色差信号及绿色信号,计算该像素的校正红色信号、校正绿色信号及校正蓝色信号; (F)依据该 1. A method of color interpolation of the noise generated by the elimination of, for eliminating the color noise in a digital image interpolation generated, the method comprising the steps of: (A) receiving a pixel of the digital image and the adjacent pixels; (B) pixel and the pixels adjacent to each patch point respectively having red, green and blue signals; (C) based on red, green and blue signals of the pixel, the second color difference signal to generate a first pixel two color difference signals, according to the red, green and blue signals of adjacent pixels, the adjacent pixels to produce a first color difference signal and second color difference signals; (D) according to the pixel of the first color difference signal and second color difference signals adjacent pixels first color difference signal and second color difference signals, the first signal and the second correcting chromatic aberration correcting color difference signals adjacent to the pixel filtering process, generating the first pixel filtered color difference signal and the second filtered chrominance signal; (E) according to the pixel a first filtered chrominance signal, a green signal and the second filtered chrominance signal, calculates a correction signal of the red pixel, a green correction signal, and a blue correction signal; (F.) according to the 像素的校正红色信号、校正绿色信号及校正蓝色信号,产生该像素的第一校正色差信号及第二校正色差信号;以及(G)重复上述步骤,直至处理完该数字影像的所有像素。 A red pixel correction signal, the correction signal, and the blue green correction signal to generate a first color difference signal and the second correction signal correcting the pixel color; and (G) repeating the above steps until all the pixels of the processed digital image.
  2. 2、如权利要求I所述的方法,其中所述步骤(C)中的第一色差信号值为该像素的红色信号值减去绿色信号值。 2. A method as claimed in claim I, wherein the first signal value of the red color difference signal of the step (C) in the pixel value by subtracting the green signal values.
  3. 3、如权利要求I所述的方法,其中所述步驟(C)中的第二色差信号值为该像素的蓝色信号值减去绿色信号值。 3. The method as claimed in claim I, wherein the signal value of the blue color difference signal of the second step (C) in the pixel value by subtracting the green signal values.
  4. 4、如权利要求I所述的方法,其中所述步骤(D)是将该第一色差信号进4亍中值滤波处理后,再进行低通滤波处理,以产生该第一滤波色至信号。 4. The method as claimed in claim I, wherein said step (D) is the first color difference signal 4 into the right foot after the median filter, and then low-pass filtered to generate the filtered first color signal to .
  5. 5、如权利要求I所述的方法,其中所述步骤(D)是将该第二色差信号进行中值滤波处理后,再进行低通滤波处理,以产生该第二滤波色差信号。 5. The method as claimed in claim I, wherein said step (D) is a second color difference signal after the median filter, and then low-pass filtered to generate the second filtered chrominance signal.
  6. 6、如权利要求I所述的方法,其中所述步骤(E)是将该第一滤波色差信号及绿色信号相加,以产生该校正红色信号。 6. The method as claimed in claim I, wherein said step (E) is the first filtered signal and green color signal are added to generate a red correction signal.
  7. 7、如权利要求I所述的方法,其中所述步骤(E)是将该第二滤波色差信号及绿色信号相加,以产生该校正蓝色信号。 7. The method as claimed in claim I, wherein said step (E) is the second filtered signal and green color signal are added to generate a blue color correction signal.
  8. 8、一种消除由内插产生的彩色噪声的系统,用于消除一数字影像中内插时所产生的彩色噪声,该系统包含: 一补点装置,其接收该数字影像中的一像素及邻近像素,将该像素及邻近像素分别补点成各自具有红色、绿色及蓝色信号; 一色差产生装置,耦合到该补点装置,依据该像素的红色、绿色及蓝色信号,产生该像素的第一色差信号及第二色差信号,依据邻近像素的红色、绿色及蓝色信号,产生邻近像素的第一色差信号及第二色差信号; 一滤波装置,耦合到该色差产生装置,以将该像素的第一色差信号及第二色差信号、邻近像素的第一色差信号及第二色差信号、邻近像素的第一校正色差信号及第二校正色差信号进行滤波处理,以产生该像素的第一滤波色差信号及第二滤波色差信号; 一校正装置,耦合到该补点装置及滤波装置,依据该像素的第 8. A system interpolated color noise generated by the cancellation, for eliminating the color noise in a digital image interpolation generated, the system comprising: a patch point means for receiving a pixel of the digital image and adjacent pixels, the adjacent pixels, and each pixel point to complement each having red, green and blue signals; a color difference generating means coupled to the fill point device, based on the red, green and blue signals of the pixel, the pixel is generated first color difference signal and second color difference signals, according to the red, green and blue signals of neighboring pixels, neighboring pixels to generate a first color difference signal and second color difference signals; a filtering means, coupled to the color difference generating means to the first pixel and the second color difference signal chrominance signal, color difference signal adjacent to the first pixel and the second color difference signals, a first color difference signal correction neighboring pixels and a second color difference signal correction filter processing is performed to generate the first pixel filtering a color difference signal and the second filtered chrominance signal; a correcting means, coupled to the patch point device and the filtering means, on the basis of the pixel 滤波色差信号、第二滤波色差信号及绿色信号,计算该像素的校正红色信号、校正绿色信号及校正蓝色信号;以及一更新装置,搞合到该校正装置,以产生该像素的第一校正色差信号及第二校正色差信号。 Filtering a color difference signal, a green signal and the second filtered chrominance signal, calculates a correction signal of the red pixel, a green correction signal, and a blue correction signal; and an updating means, the correction means to engage together, to generate the first correction pixel color difference signal and the second signal to correct chromatic aberration.
  9. 9、如权利要求8所述的系统,其中所述色差产生装置包含一第一减法器,用于将该像素的红色信号值减去绿色信号值,产生该第一色差信号。 9. The system as claimed in claim 8, wherein said first color difference generating means comprises a subtracter for the red pixel value signal by subtracting the green signal values, generating the first color difference signal.
  10. 10、如权利要求8所述的系统,其中所述色差产生装置还包含一第二减法器,用于将该像素的蓝色信号值减去绿色信号值,产生该第二色差信号。 10. The system as claimed in claim 8, wherein said color difference generating means further comprises a second subtractor for the blue pixel value signal by subtracting the green signal value, to generate the second color difference signal.
  11. 11、如权利要求8所述的系统,其中所述滤波装置还包含: 一第一中值滤波器,其将该第一色差信号进行中值滤波处理;以及一第一低通滤波器,耦合到该第一中值滤波器,将经中值滤波的信号进行低通滤波处理,产生该第一滤波色差信号。 11. The system as claimed in claim 8, wherein said filtering means further comprises: a first median filter, the median filtering process that performs the first color difference signal; and a first low-pass filter coupled to the first median filter, a low-pass filtering process by the median filtered signal, generating the first filtered chrominance signal.
  12. 12、如权利要求11所述的系统,其中所述滤波装置还包含: 一第二中值滤波器,其将该第二色差信号进行中值滤波处理;以及一第二低通滤波器,耦合到该第二中值滤波器,将经中值滤波的信号进行低通滤波处理,产生该第二滤波色差信号。 12. The system as claimed in claim 11, wherein said filtering means further comprises: a second median filter, the second color difference signals which the median filter processing; and a second low pass filter coupled to the second median filter, a low-pass filtering process by the median filtered signal, generating a second filtered color difference signals.
  13. 13、如权利要求9所述的系统,其中所述校正装置包含: 一第一加法器,其将该第一滤、波色差信号及绿色信号相加,以产生该校正红色信号。 13. The system as claimed in claim 9, wherein said correcting means comprises: a first adder, that the first filter, and a green color difference signal wave signals are summed to produce the correction signal is red.
  14. 14、如权利要求9所述的系统,其中所述校正装置还包含: 一第二加法器,其将该第二滤波色差信号及绿色信号相加,以产生该校正蓝色信号。 14. The system as claimed in claim 9, wherein said correcting means further comprises: a second adder adding the second filtered chrominance signal and a green signal, a blue signal to generate the correction.
  15. 15、如权利要求11或12所述的系统,其中所述中值滤波器为二维3x3 中值滤波器。 15. The system as claimed in claim 11 or 12, wherein said two-dimensional median filter is a 3x3 median filter.
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