bitmap转YUV420之后的图片和原图有色差 5C

void encodeYUV420SP(byte[] yuv420sp, int[] argb, int width, int height) {
final int frameSize = width * height;

``````    int yIndex = 0;
int uvIndex = frameSize;

int a, R, G, B, Y, U, V;
int index = 0;
for (int j = 0; j < height; j++) {
for (int i = 0; i < width; i++) {

R = (argb[index] & 0xff0000) >> 16;
G = (argb[index] & 0xff00) >> 8;
B = (argb[index] & 0xff) >> 0;

// well known RGB to YUV algorithm
Y = ((66 * R + 129 * G + 25 * B + 128) >> 8) + 16;
U = ((-38 * R - 74 * G + 112 * B + 128) >> 8) + 128;
V = ((112 * R - 94 * G - 18 * B + 128) >> 8) + 128;

// NV21 has a plane of Y and interleaved planes of VU each sampled by a factor of 2
//    meaning for every 4 Y pixels there are 1 V and 1 U.  Note the sampling is every other
//    pixel AND every other scanline.
yuv420sp[yIndex++] = (byte) ((Y < 0) ? 0 : ((Y > 255) ? 255 : Y));
if (j % 2 == 0 && index % 2 == 0) {
yuv420sp[uvIndex++] = (byte) ((V < 0) ? 0 : ((V > 255) ? 255 : V));
yuv420sp[uvIndex++] = (byte) ((U < 0) ? 0 : ((U > 255) ? 255 : U));
}
index++;
}
}
}
``````

2个回答

zjandandroid 回复weixin_41991913: 怎么转
2 年多之前 回复
weixin_41991913 直接转YUV
2 年多之前 回复
zjandandroid 我贴出来了啊 上面就是
2 年多之前 回复