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Posted in : Java Beginners

this code is to perform LocalColorHistogram.But i can't understand it

public Vector<Double> getFeatureVector(int[] inImg, int height, int width, int[] maskImg, int flag, double feature, int featureDimension) { int gridCount = 4; int row = gridCount * gridCount; Vector<Double> localColorHistogram = new Vector<Double>(row * 64); int size = width * height; int i = 0; int j = 0; int k = 0; double[][] histogram = new double[row][64];

for(i=0 ; i<row ; i++){ histogram[i] = new double[64]; for(j=0 ; j<64 ; j++){ histogram[i][j] = 0.0d; } } for(i=0 ; i<size ; i++){ k = (inImg[i]>>18 & 0x30) | (inImg[i]>>12 & 0xc) | (inImg[i]>>6 & 0x3); j = getGrid(i, width, height, gridCount); histogram[j][k] += 1.0; } for(i=0 ; i<gridCount ; i++) for(j=0 ; j<64 ; j++) localColorHistogram.add(round(((double)histogram[i][j]/(size/gridCount)))); histogram = null; return localColorHistogram; } private int getGrid(double j, double width, double height, int gridCount){ double localWidth = width/gridCount; double localHeight = height/gridCount; int cell = (int)(j/width/localHeight)*gridCount + (int)((j % width)/localWidth); return cell; }

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