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

Program Listing 2

Program Listing 2: The program listing of iterative method for calculating the threshold.

 Input: grayImage

 Output: threshold

 private static int getIterationHresholdValue (int minGrayValue, int maxGrayValue) {

  int T1;

  int T2 = (maxGrayValue + minGrayValue)/2;

  do {

   T1 = T2;

   double s = 0, l = 0, cs = 0, cl = 0;

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

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

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

      if (gray < T1) {

       s += gray;

       cs++;

      }

      if (gray > T1) {

       l += gray;

       cl++;

      }

     }

    }

    T2 = (int) (s / cs + l / cl) / 2;

   }

   while (T1! = T2);

   return T1;

  }