Scanned color image improvement using Image descreening

To print continuous tone images, Electrophotographic (EP) printer uses halftoning technique. Image halftoning prints the image as matrix of dots which are halftone patterns those are hardly perceived by human eyes. So scanned images obtained from such hard printed copies are normally affected by screen like artifacts and moiré patterns. Scanned color Image improvement using Image descreening technique will be used to descreen color scanned images so as to remove screening patterns and Moiré effects. Technique applied on grayscale images produces clean smooth regions and sharp edges from scanned halftone images. For color images technique consists of separating image plane and applying denoising algorithm to filter out printing noise and distortions. Features are then extracted to build adaptive filter kernel which while remove halftone patterns. Edge preserving filtering will be carried out to enhance the sharpness of the edges and finally all planes will be merged to get final denoised color image.