Is there a rgb2gray conversion block in Simulink ?

I have a RGB video and I would like to find out optical flow and optical flow block accepts only 2-d image only...So I want to convert this RGB into Gray and then give Grayscale output to Optical Flow block...But I didn't find a default Grayscale block in Simulink...It would be gr eat if anyone could help me with this...

Answer 1

[Doug Eastman]

The Color Space Conversion block in Conversions library of the Video and Image Processing blockset can convert RGB video to intensity. The viptrafficof demo shows an example of using this block to perform optical flow analysis on an RGB video.

[Harsha Vardhan Rao Avunoori]

Another problem!!! Is there a way to convert back to RGB from Intensity ??? I have to store the output into an Avi file using the To Multimedia File Sink block....but since my output is only 2-D it is showing me an error...How can I convert my output to m-n-3 ???

[pieter sibma]

not straightforward to create 3 color values from 1 intensity value. you will need to demosaic for that.

Answer 2

[Messlaha Hamza]

i still have the same problem, i don't know how to convert my output to m-n-3 matrix

[Mahadev]

add a matrix concatenate block. double click the matrix concatenate block and change the dimensions to 3