/**
* Compute the descriptor with information on which level in the scale-space to use.
*
* @param c_x Location of feature in input image
* @param c_y Location of feature in input image
* @param scale Size of the feature in the input image
* @param orientation Orientation of the feature
* @param imageIndex Which octave contains the feature
* @param pixelScale The scale of a pixel in the octave
* @param desc (Output) storage for the descriptor
*/
public void process(
double c_x,
double c_y,
double scale,
double orientation,
int imageIndex,
double pixelScale,
SurfFeature desc) {
image = ss.getPyramidLayer(imageIndex);
derivX = ss.getDerivativeX(imageIndex);
derivY = ss.getDerivativeY(imageIndex);
for (int i = 0; i < desc.value.length; i++) desc.value[i] = 0;
for (int i = 0; i < histograms.length; i++)
for (int j = 0; j < histograms[i].length; j++) histograms[i][j] = 0;
// account for the scale of the image in each octave
constructHistograms(c_x / pixelScale, c_y / pixelScale, scale / pixelScale, orientation);
computeDescriptor(desc);
}
