I use tesseract library for android to capture certain text from an image. I know that the captured image is not saved anywhere, it gets recycled. I need to find the original colored bitmap. I have been trying to locate the original colored bitmap, but all I could find was a grayscaled bitmap:
Bitmap bitmap = activity.getCameraManager().buildLuminanceSource(data, width, height).renderCroppedGreyscaleBitmap();
When I save this bitmap to the sdcard, I get a gray scaled image. renderCroppedGreyscaleBitmap() method is as follows:
public Bitmap renderCroppedGreyscaleBitmap() {
int width = getWidth();
int height = getHeight();
int[] pixels = new int[width * height];
byte[] yuv = yuvData;
int inputOffset = top * dataWidth + left;
for (int y = 0; y < height; y++) {
int outputOffset = y * width;
for (int x = 0; x < width; x++) {
int grey = yuv[inputOffset + x] & 0xff;
pixels[outputOffset + x] = 0xFF000000 | (grey * 0x00010101);
}
inputOffset += dataWidth;
}
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
}
I would greatly appreciate if someone can tell me to get the original colored image captured. Do I have to change this method to get the colored image(RGB)?
/**
* YUV to bitmap
* @param data The YUV preview frame.
* @param width The width of the preview frame.
* @param height The height of the preview frame.
* @return
*/
public static Bitmap byteArray2Bitmap(byte[] data, int width, int height) {
YuvImage yuvimage = new YuvImage(data, ImageFormat.NV21, width, height, null);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
yuvimage.compressToJpeg(new Rect(0, 0, width, height), 100, baos);
byte[] rawImage = baos.toByteArray();
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.RGB_565;
Bitmap bitmap = BitmapFactory.decodeByteArray(rawImage, 0, rawImage.length, options);
Matrix matrix = new Matrix();
matrix.postRotate(90);
return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
}
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