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RGB to YUV CDFG

RGB to YUV CDFG. 林孟諭 Dept. of Electrical Engineering National Cheng Kung University Tainan, Taiwan, R.O.C. C program. void main(void) { int a, b, c; … RGB_2_YCrCb ( I_Frame , O_Frame ); … } void RGB_2_YCrCb ( I_Frame , O_Frame ) { int y, cb , cr ;

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RGB to YUV CDFG

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  1. RGB to YUV CDFG 林孟諭 Dept. of Electrical Engineering National Cheng Kung University Tainan, Taiwan, R.O.C

  2. C program void main(void) {int a, b, c; … RGB_2_YCrCb( I_Frame, O_Frame); … } void RGB_2_YCrCb (I_Frame, O_Frame) { inty, cb, cr; for each pixel (a, b, c) in I_Frame do { y =0.257*a + 0.504*b + 0.098*c + 16; cb = -0.148*a -0.291*b + 0.439*c + 128; cr = 0.439*a -0.368*b -0.071*c + 128; write (y, cr, cb) to O_Frame; } } // Y: black-white component, UV: color differences

  3. Single Operation description begin Py= a* 0.257; // 1 Qy= b* 0.504; // 2 Ry= c* 0.098; // 3 Sy= Ry+ 16; // 4 Ty= Py+ Qy; // 5 y = Sy+ Ty; // 6 Pcb= a* -0.148; // 7 Qcb= b* -0.291; // 8 Rcb= c* 0.439; // 9 Scb= Rcb+ 128; // 10 Tcb= Pcb+ Qcb; // 11 cb = Scb+ Tcb; // 12 Pcr= a* 0.439; // 13 Qcr= b* -0.368; // 14 Rcr= c* -0.071; // 15 Scr= Rcr+ 128; // 16 Tcr= Pcr+ Qcr; // 17 cr = Scr+ Tcr; // 18 end

  4. CDFG b a c 128 a 0.257 b 0.504 c 0.098 16 a -0.148 b -0.291 c 0.439 a 0.439 b -0.368 c -0.071 128 ＊ ＊ ＊ ＊ ＊ ＊ ＊ ＊ ＊ Py Qy Ry Pcb Qcb Rcb Pcr Qcr Rcr ＋ ＋ ＋ ＋ ＋ ＋ Ty Tcb Tcr Sy Scb Scr ＋ ＋ ＋ y cb cr

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