How to add image 'x' to even frames and one image 'y' to odd frames

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Alber
Alber 2020-2-27
评论： Alber 2020-3-9
Hello,
I have a video that we will call 'x' and some images that we will call 'output_cross_alfa' and 'output_cross_Nalfa'.
My goal is to make the sum of 'x' with 'output_cross_alfa' in the even frames, and in the odd frames the sum of 'x' is done with 'output_cross_Nalfa'. The final video should be:
frame1 = frame1 + output_cross_Nalfa;
frame2 = frame2 + output_cross_alfa;
frame3 = frame3 + output_cross_Nalfa;
frame4 = frame4 + output_cross_alfa;
......
To do this I used this code:
for ii = 1: 2: length (imageNames)
for kk = 2: 2: length (imageNames)
img1 = im2single (imread (fullfile (workingDir, 'images', imageNames {ii})));
image_2 = im2single (img1 + output_cross_alfa);
img2 = im2single (imread (fullfile (workingDir, 'images', imageNames {kk})));
image_1 = im2single (img2 + output_cross_Nalfa);
output = uint8 (image_par + image_par);
writeVideo (outputVideo, output);
end
end
But I only get screenshots in black and gray when representing it.
To represent it I use this:
shuttleAvi = VideoReader (fullfile (workingDir, 'shuttle_out.avi'));
ii = 1;
while hasFrame (shuttleAvi)
mov (ii) = (im2frame (readFrame (shuttleAvi)));
ii = ii + 1;
end
figure, imshow (mov (1) .cdata, 'Border', 'tight');
movie (mov, 1, shuttleAvi.FrameRate);
And I have no idea what the failure may be.

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采纳的回答

Prabhan Purwar
Prabhan Purwar 2020-3-5
Hi,
According to your description there doesn't seem any need for nested loops. Try making use of the following code:
outputVideo= VideoWriter('newfile.avi');
open(outputVideo);
for ii = 1: 2: length (imageNames)
kk=ii+1;
img1 = im2single (imread (fullfile (workingDir, 'images', imageNames {ii})));
image_2 = im2single (img1 + output_cross_alfa);
img2 = im2single (imread (fullfile (workingDir, 'images', imageNames {kk})));
image_1 = im2single (img2 + output_cross_Nalfa);
output = image_1;
writeVideo (outputVideo, output);
output = image_2;
writeVideo (outputVideo, output);
end
close(outputVideo);
Hope it helps.

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