GPU-based image tone mapping method

The invention provides a GPU-based image tone mapping method. According to the method, the initial?brightness value of?each?pixel of a to-be-processed image is firstly acquired, a whole brightness value is then obtained according to the initial?brightness value of?each?pixel, the to-be-processed image is further mapped in an intermediate gray area, local contrast enhancement is carried out on the mapped image to obtain the final brightness value of?each?pixel, and tone mapping is finally finished with the final brightness value. The image tone mapping method is realized on the basis of GPU programmable?pipeline, Gaussian filtering adopts space convolution, pixels of the to-be-processed image is divided into a plurality of parts and different threads in the GPU are adopted for finishing convolution, the parallel?processing ability of the GPU is made full use of, the speed of image tone mapping is greatly improved, interactive?frame rate?requirements can be achieved, and realization of real-time image tone mapping is facilitated.