CV_Threshold function to threshold input image dst = CV_Threshold(srcimg,code,threshold,max_value,thresh_type) srcimg: source image to be converted threshold: threshold value max_value: maximum value to be used with THRESH_BINARY and THRESH_BINARY_INV thresh_type: Type for threshold. It can one of the following: THRESH_BINARY, THRESH_BINARY_INV, THRESH_TRUNC, THRESH_TOZERO, THRESH_TOZERO_INV This function can be used for converting an image to other colorspace. Refer OpenCV documentation for list of available conversions This is curretly dummy function. It provides no functionality but is required for providing support for generating C code for OpenCV CV_CreateImage Siddhesh Wani