code: public static double[] translateCoordsScaleImage(double x, double y, double origImageW, double origImageH, double newImageW, double newImageH){
  
          double newX = x * newImageW / origImageW;
          double newY = y * newImageH / origImageH;
  
          return new double[]{newX, newY};
      }
docs: Calculate coordinates in an image, assuming the image has been scaled from (oH x oW) pixels to (nH x nW) pixels
  
  @param x          X position (pixels) to translate
  @param y          Y position (pixels) to translate
  @param origImageW Original image width (pixels)
  @param origImageH Original image height (pixels)
  @param newImageW  New image width (pixels)
  @param newImageH  New image height (pixels)
  @return  New X and Y coordinates (pixels, in new image)