Image Contrast and Sharpness Enhancement

摘要

The invention relates to a method for image enhancement. Overshoots of image boosting in areas with edges can be prevented by splitting an image into at least three sub-images, wherein each of the sub-images represents a corresponding spatial frequency range of the image, calculating a pixel detail signal for at least one of the sub-images, depending on at least a pixel detail signal of another frequency range, calculating a pixel change value for pixels within the sub-images depending on the corresponding pixel detail signal, calculating changed sub-images by changing pixel values within the sub-images depending on the corresponding pixel change value, and combining the changed sub-images into an output image.