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HV7151SP Datasheet(PDF) 13 Page - Hynix Semiconductor |
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HV7151SP Datasheet(HTML) 13 Page - Hynix Semiconductor |
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13 / 89 page  HV7151SP CMOS Image Sensor Confidential With Image Signal Processing This document is a general product description and is subject to change without notice. Hynix Semiconductor Inc. does not assume any responsibility for use of circuits described and no patent licenses are implied. - 13 - 2003 Hynix Semiconductor Inc. matrix of color spread matrix. Nine registers for matrix coefficients are used in color correction operation to get the optimal pure color. The relationship between input color and color-corrected color is defined as below formula. • = ′ ′ ′ B G R CRCM CRCM CRCM CRCM CRCM CRCM CRCM CRCM CRCM B G R 33 32 31 23 22 21 13 12 11 where R,G,B = Sensor color output R’,G’,B’= Color-corrected output Coefficients CRCMxx are programmable from –127/64 ~ 127/64. Programming register value for intended color correction matrix coefficients should be resolved by the following equations. For positive values, CRCMxx = Integer(Real Coefficient Value x 64); For negative values, CRCMxx = Two’s Complement(Integer(Real Coefficient Value x 64)); Real Coefficient Value values from –127/64 ~ 127/64 can be programmed. Color Space Conversion & Reverse Color Space Conversion Both of color space conversion and reverse color space conversion are implemented by 3x3 matrix operation. Output ranges of color space conversion and reverse conversion are existed two modes. One is 16 ≤ Y ≤235, 16≤ Cb,Cr ≤240 & 16≤ reverse-R,G,B ≤235 and Another is 0≤ Y,Cb,Cr ≤255 & 0≤ reverse-R,G,B ≤255. These different modes are selected by control register. For color space conversion and reverse conversion matrix, the equation from CCIR-601 standard is normally used. < Conversion Equation > Mode 1 : 255 ~ 0 : 255 ~ 0 : 255 ~ 0 : 128 128 0 081 . 0 419 . 0 500 . 0 500 . 0 331 . 0 169 . 0 114 . 0 587 . 0 299 . 0 Range Range Range B G R Cr Cb Y + • − − − − = Mode 2 : 240 ~ 16 : 240 ~ 16 : 235 ~ 16 : 128 128 16 071 . 0 368 . 0 439 . 0 439 . 0 291 . 0 148 . 0 098 . 0 504 . 0 257 . 0 Range Range Range B G R Cr Cb Y + • − − − − = |
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