Digital image processing and enhancing system and method with function of removing noise

A digital image processing enhancing system with denoising function, wherein,

• the system includes five modules:
• an input module, an image decomposing module, an illumination image processing module, a reflection image processing module, a composing and outputting module, wherein:
• the input module is configured to collect a digital image as a system input, an obtained digital image is input into the image decomposing module,
• the image decomposing module is configured to decompose the input image into an illumination image L and a reflection image R, which are input into the illumination image processing module and the reflection image processing module respectively,
• the illumination image processing module is configured to perform a non-linear correction on the illumination image L of the input image and outputs a corrected illumination image L′,
• the reflection image processing module is configured to perform a denoising and filtering process on pixels corresponding to excessive dark regions in the reflection image R, and outputs a denoised reflection image R′, wherein the excessive dark regions of the input image can be determined by an information of the illumination image, and is configured to identify the excessive dark regions of the input image in the illumination image and denoise and filter regions corresponding to the reflection image of the input image, then the composing and outputting module is configured to re-compose the L′ and R′ output from the former two modules in an output image and outputs to output the output image to an output device.