how to make parallelization of different functions in matlab

I created matlab functions for digital image watermarking. Now I want to use multithreading for it. Means want to run my functions on different threads of my machine. Please suggest me. I work with 4096*4096 size iamge and perform watermark embedding and extraction process. Please help me.

[KSSV]

If you have Graphics Card.....try gpuArray.

[shital shinde]

actually my work is for both GPU core and CPU core. currently, I am working for CPU cores. I want to use multithreding. Please suggets me any idea.

[Mohammad Sami]

See if this example is what you are looking for

https://www.mathworks.com/help/releases/R2019b/parallel-computing/examples/perform-image-acquisition-from-webcam-and-parallel-image-processing.html

[Walter Roberson]

If you can process blocks independently, then you can create a cell array of blocks, and parfor over the linear index of the blocks, processing the block indexed and saving the result as appropriate.

[Walter Roberson]

In terms of your posted code: change your

for k=1:262144

to

parfor k=1:262144

[shital shinde]

Yes I tried that also, but it gives error for variables that I used. please suggest me. I tried parfor insted of for loop but is gives the same error again and again. please suggest me.

It says the parfor loop can not run due to the way the variable 'w' is used.

[Walter Roberson]

As far as I can see, your latest code is at

https://www.mathworks.com/matlabcentral/answers/415089-parallel-computing-for-images-processing#comment_796821

But it is difficult to tell as you have spread this conversation out over about 6 locations, duplicating your questions and confusing the volunteers.

[shital shinde]

Ok. Sorry for this one. Actually I am new for this one. Thats why this issue occurs. Actually my main task is for parallelization of digital image watermarking in matlab. For that I want to first learn image processing using parallel computing. So I need some basic problem statement which clear amout parallel computing. That I have to show my guide. After that I will go for watermarking. So, help me for that please. I am new for this one. And sorry for this inconvenience.

thank you

[shital shinde]

please give me suggestion for the task.