CV_GaussianBlur function to blur image using gaussian filter cvtimg = CV_GaussianBlur(srcimg,ksize_width,ksize_height,sigma_x,sigma_y,border_type) srcimg : Source image. ksize_width, ksize_height : blurring kernel size. must be odd. sigmaX : Gaussian kernel standard deviation in X direction. sigmaY : Gaussian kernel standard deviation in Y direction; border_type : border mode used to extrapolate pixels outside of the image. This function can be used for blurring image using gaussian filter. Image can be of any depth and have any no of channels. For sigmaX and sigmaY : if sigmaY is zero, it is set to be equal to sigmaX, if both sigmas are zeros, they are computed from ksize.width and ksize.height , respectively. border_type can be : BORDER_REPLICATE: aaaaaa|abcdefgh|hhhhhhh BORDER_REFLECT: fedcba|abcdefgh|hgfedcb BORDER_REFLECT_101: gfedcb|abcdefgh|gfedcba BORDER_WRAP: cdefgh|abcdefgh|abcdefg BORDER_CONSTANT: iiiiii|abcdefgh|iiiiiii This is curretly dummy function. It provides no functionality but is required for providing support for generating C code for OpenCV CV_Blur, CV_CvtColor Siddhesh Wani