java rgb888转yuv nv21 红外图转yuv nv21

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我是靠谱客的博主搞怪月饼，最近开发中收集的这篇文章主要介绍java rgb888转yuv nv21 红外图转yuv nv21，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

byte[] rgb888_2_nv21(byte[] src, int width, int height) {
   byte[] iYuv = new byte[3*width * height/2];
   int ui = width * height;
   int i = 0;
   int j, k;
   int sR,sG,sB;
   for (j = 0; j < height; j++) {
       for (k = 0; k < width; k++) {
           int index = 3*(j*width+k);
           sR = Byte.toUnsignedInt(src[index]);
           sG = Byte.toUnsignedInt(src[index+1]);
           sB = Byte.toUnsignedInt(src[index+2]);

           int temp = ((299 * sR + 597 * sG + 114 * sB) / 1000);
           if(temp>254){
               temp = 254;
           }
           iYuv[i] = (byte) temp;

           if (0 == j % 2 && 0 == k % 2) {
               iYuv[ui] = (byte)((500*sR - 418.7 * sG - 81.3*sB+128000)/1000);
               ui++;
               iYuv[ui] = (byte)((-168.7 * sR - 331.3 * sG + 500*sB +128000)/1000);
               ui++;
           }
           i++;
       }
   }
   return iYuv;
}

byte[] ir_2_nv21(byte[] src, int width, int height) {
byte[] iYuv = new byte[3*width * height/2];
int ui = width * height;
int i = 0;
int j, k;
int sR,sG,sB;
for (j = 0; j < height; j++) {
for (k = 0; k < width; k++) {
int index = (j*width+k);
sR = Byte.toUnsignedInt(src[index]);
int temp = sR;
if(temp>254){
temp = 254;
}
iYuv[i] = (byte) temp;

if (0 == j % 2 && 0 == k % 2) {
iYuv[ui] = (byte) 128;
ui++;
iYuv[ui] = (byte) 128;
ui++;
}
i++;
}
}
return iYuv;
}