reads an image from a video file, is called by ReadImage
[PixelList Dimensions] = ReadImageFile(VideoFilePointer);
pointer to a video file
column vector that contains the color channel intensities or gray values
column vector that contains the number of rows, columns and color channels
This function reads an image from a video file and returns a pixel list and width, height and number of channels. ReadImage calls this function so you do not need to call it yourself.