image and video process

Hi all,

I have a video of about 400 frames(.AVI), first I changed the brightness, then cropped the images to focus on interesting areas. After that, I converted the cropped image to a binary image. In the end, I saved both binary and original images which should be the same size.

I already did this only for one frame (image) but I have no idea how to do these steps for the entire video...

Here is what I did>>>

clear;
img  = imread('3217.tif');
img = imadjust(img);
I = imcrop(img,[120,280,1990,980]);
[rows,columns,ch] = size(img);
if (ch > 1)
    img = img(:,:,3);
end
close all;

img1 = I < 120;

disp(img1(1,1));
disp(nnz(img1));
total = nnz(img1);

% figure(1) ; imshow(img) 
% 
% figure(2) ; imshow(I) 
% figure(3) ; imshow(img1) ;


imwrite(I, 'F:\Herder\collective obstacles\process\PIV\No obstacle\cropped\3217.tif');
imwrite(img1, 'F:\Herder\collective obstacles\process\PIV\No obstacle\cropped\binary\3217.tif');

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

Answer 1

[Prachi Kulkarni]

Hi,

Sample code for processing every frame in a video-

vidObj = VideoReader(filename); % filename (string): name of video file with extension
while hasFrame(vidObj)
    vidFrame = readFrame(vidObj);
    % The code for processing each frame can go here
end

For more details, please refer to the following documentation-

Read Video Files