MyOcrTool: Visualization System for Generating Associative Images of Chinese Characters in Smart Devices

Program Listing 1

Program Listing 1: Implementation of picture graying procedure.

 Input: original image

 Output: grayImage private static Bitmap getGrayImg(){

  int alpha = 0xFF << 24;

  // Set transparency

  for (int i = 0; i < imgHeight; i++) {

   for (int j = 0; j < imgWidth; j++) {

    int grey = imgPixels[imgWidth∗i + j];

    // Get the jth pixel of the i-th row

    int red = ((grey & 0x00FF0000) >> 16);

    // Get red gray value

    int green = ((grey & 0x0000FF00) >> 8);

    // Get green gray value

    int blue = (grey & 0x000000FF);

    // Get bule gray value

    grey = (int) ((float) red∗0.3 + (float) green∗0.59 + (float) blue∗0.11);

    // obtain grayscale color values

    grey = alpha | (grey << 16) | (grey << 8) | grey; imgPixels[imgWidth∗i + j] = grey;

   }

  }

  Bitmap result = Bitmap.createBitmap(imgWidth, imgHeight, Config.RGB_565);

  result.setPixels(imgPixels, 0, imgWidth, 0, 0, imgWidth, imgHeight);

  return result;

 }