How to make Operations on video frames?

Hi I have a mp4 video , I turned it into Frames ... but I want to make operations on EACH frame

Can any one help ???

Answer 1

[Walter Roberson]

Loop?

   for K = 1 : number_of_frames
     this_frame = frames{K};     %or however you stored them
     now do something with this_frame
   end

[Christine Ak]

Yeah its the way how I converted the video into frames ,, but using " this_frame" is not a good Idea because it will use the LAST value of it , I want to use EACH frame

[Walter Roberson]

That code will apply whatever onto each frame. Your code to do something with the frame is within the loop, so it gets presented with one frame at a time, in sequence.

Perhaps your question has to do with storing the results as you go. In that case have a look at

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

[Christine Ak]

That's what I did.......Thank You so much :D

Answer 2

[Image Analyst]

See my demo, attached. I calculate a background frame comprised of the last few frames, and then subtract it from the current frame. You can do something similar with whatever operation you want to do.

[Christine Ak]

Thank You , but I need to apply a code on all the frames , but each one will give a specific answer , which means that each frame should has a specific name can be called with .

[Image Analyst]

I'm not sure what you're asking. It does each frame, which means it does all frames. Do you have some different definition of each and all that I don't know about? Of course every frame is different so every frame will have a different result or value, that's why I kept track of them in arrays that have the same number of elements as there are frames in the video. I really have no idea at all how to answer you, ... well not " answer" you since you didn't ask a question in your comment above, but I guess I mean "reply" to you.

[Christine Ak]

actually I found my answer.... thank You Soooooo much ... You are always helpful :D

[Mustafa Alhandhali]

how you did it??

[Image Analyst]

I doubt she'll answer, after more than 5 years, but I will. Is there something wrong with my code that doesn't work for you? Did you adapt it? Attach your adapted code.

Answer 3

[komal]

i have converted the videos into frames and now I want to subtract one frame from another like frame 1-frame 2 and then frame 2-frame3 and so on till the video ends.

[Image Analyst]

Did you see my answer? That's basically what I do. Adapt it as needed. It should be trivial.

[komal]

Yes sir I saw your answer but my question is different.

I want to subtract the frames and continously run the loop for the whole video frames.

ex-frame 1-frame 2 and show the result in graph and then frame 2 - frame 3.Individual ans shown on graph

Sorry if I m unable to explain you clearly