Methods region the gain correction to enhance the image

The present invention relates to a process area gain correction utilized to strengthen the image. This method comprises the steps of: image pixel value is replaced by the red, green and blue maximum; from a plurality of pixels of the digital image, to select a particular pixel; selecting a plurality of pixels of the particular pixel adjacent to constitute a particular zone block; calculating an average specific block; providing a plurality of curve function; to obtain a curve function corresponding to the average value of a particular block, the pixel values ​​are substituted into the above-described curve function, to obtain a new output luminance value.