Converting grayscale video to binary for code generation

Question

this is my problem: recently I learned something about code generation from Simulink model by Simulink Coder. The model includes a MATLAB Function block that converts from gray-scale video signal to binary using:

EDIT: Binary = im2bw(inputVideo, level);

because, for my application, I noticed that it is more accurate than Autothreshold block (I do not why), but Simulink Coder does not support im2bw function (like you can see here http://www.mathworks.it/it/help/simulink/ug/functions-supported-for-code-generation--categorical-list.html#bsl0arh-1). So, I would try to create an outputVideo using:

Binary = false(size(inputVideo)); % to inizialize
Binary(inputVideo>=threshold)==true;

...but when I do that with an grayscale image, outbinary image is a full-black image. Is there a way to perform this conversion without using Autothreshold block or im2bw function ? Thanks in advance!

Answer 1

This line is wrong:

Binary(inputVideo>=threshold)==true;

Here you are comparing Binary(inputVideo>=threshold) with true. Correct:

Binary(inputVideo>=threshold)=true;