好了,所以我的問題是幾乎相同的: Converting preview frame to bitmapAndroid decodeYUV420SP導致綠色圖像?
然而,他的答案是否定的好,並試圖使用它並沒有解決我的問題。
所以我現在要做的是將每幀作爲位圖發送到一個方法來檢測是否有任何面孔,但首先我需要創建一個位圖,這意味着我必須使用decodeYUV420sp方法,這似乎不能正常工作,我的所有圖像都是以綠色和黃色領帶染色的形象出現的。這裏是我的代碼:
這是onPreviewFrame:
Parameters parameters = cam.getParameters();
Integer width = parameters.getPreviewSize().width;
Integer height = parameters.getPreviewSize().height;
Log.i("preview size: ", String.valueOf(width) + "x" + String.valueOf(height));
int[] mIntArray = new int[width*height];
// Decode Yuv data to integer array
decodeYUV420SP(mIntArray, data, width, height);
//Initialize the bitmap, with the replaced color
Bitmap bmp = Bitmap.createBitmap(mIntArray, width, height, Bitmap.Config.ARGB_8888);
saveImage(bmp);
這是decodeYUV方法:
static public void decodeYUV420SP(int[] rgba, byte[] yuv420sp, int width,
int height) {
final int frameSize = width * height;
for (int j = 0, yp = 0; j < height; j++) {
int uvp = frameSize + (j >> 1) * width, u = 0, v = 0;
for (int i = 0; i < width; i++, yp++) {
int y = (0xff & ((int) yuv420sp[yp])) - 16;
if (y < 0)
y = 0;
if ((i & 1) == 0) {
v = (0xff & yuv420sp[uvp++]) - 128;
u = (0xff & yuv420sp[uvp++]) - 128;
}
int y1192 = 1192 * y;
int r = (y1192 + 1634 * v);
int g = (y1192 - 833 * v - 400 * u);
int b = (y1192 + 2066 * u);
if (r < 0)
r = 0;
else if (r > 262143)
r = 262143;
if (g < 0)
g = 0;
else if (g > 262143)
g = 262143;
if (b < 0)
b = 0;
else if (b > 262143)
b = 262143;
// rgb[yp] = 0xff000000 | ((r << 6) & 0xff0000) | ((g >> 2) &
// 0xff00) | ((b >> 10) & 0xff);
// rgba, divide 2^10 (>> 10)
rgba[yp] = ((r << 14) & 0xff000000) | ((g << 6) & 0xff0000)
| ((b >> 2) | 0xff00);
}
}
}
,這是我打電話保存位圖,看看有什麼方法,他們看起來像:
private void saveImage(Bitmap bmp) {
File myDir=new File("/sdcard/saved_images");
myDir.mkdirs();
Random generator = new Random();
int n = 10000;
n = generator.nextInt(n);
String fname = "Image-"+ n +".jpg";
File file = new File (myDir, fname);
if (file.exists()) file.delete();
try {
FileOutputStream out = new FileOutputStream(file);
bmp.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
這裏所得到的圖像: https://docs.google.com/drawings/d/1kyIvb4oHHInW_c71mjfFSVCxVopBgBWX3k1OR_nMgRA/edit
此外,我無法繞過此通過:parameters.setPreviewFormat(ImageFormat.RGB_565);這在我的三星聯盟中不受支持。 –
好吧,所以問題是decodeYUV方法,我從一個不同的stackoverflow帖子在這裏: http://stackoverflow.com/questions/9325861/converting-yuv-rgbimage-processing-yuv-during-onpreviewframe-in-android didn很不起作用。 但我用我認爲必須從這裏的原始decodeYUV方法取代: http://code.google.com/p/android/issues/detail?id=823 圖像出現正常。 –
好,現在問題解決了嗎?請添加[關閉] e主題來體現這一點! –