how to generate random noise and fixed pattern noise in video

how to add random and fixed pattern noise in video?

[Image Analyst]

To LIVE video, or to a recorded video stored in a file?

[ANUPRIYA NALLUSAMY]

recorded video stored in a file

[Michael Bianchi]

How would one go about LIVE video?

Answer 1

[Dinesh Iyer]

Anupriya,

You can use the imnoise function in the Image Processing Toolbox to add noise to an image. You can follow these steps:

1. Read video into MATLAB one frame at a time using VideoReader.
2. Apply noise on each frame using imnoise;.
3. Write out frames into a video file using VideoWriter.

Hope this helps.

Dinesh

[ANUPRIYA NALLUSAMY]

In the image processing toolbox,there is no function avaliable for random(3D) and fixed pattern noise(3D) for to add in video...how to add noise in video?.with example code

Answer 2

[Iftikhar Ahmad]

obj = mmreader('xylophone.mpg'); video = read(obj); nFrames = size(video,4);

   for i = 1 : nFrames     
       I(:,:,:,i)  = imnoise(video(:,:,:,i),'gaussian');
       imshow(I(:,:,:,i));  
       drawnow;
   end