Image bilateral filtering method realized by using FPGA (Field Programmable Gate Array)

The invention discloses an image bilateral filtering method realized by using an FPGA (Field Programmable Gate Array). The method comprises the following steps: S1, generating a filtering template through formula calculation; s2, generating a data window of which the size is the same as that of the filtering template, and determining a central point pixel of the window; s3, calculating a difference mean value between the gray scale of the central point pixel of the data window and the gray scale of the neighborhood pixel; s4, a filtering template is selected according to comparison between the gray difference mean value and a proposed threshold value; and S5, performing convolution by using the selected filtering template and window data to complete bilateral filtering. According to the method, a small number of weight coefficients are adopted to form the filtering template, the filtering template is directly solidified in an FGPA program, then the template is selected through a threshold value judgment mecha