How to centering an Silhouette image

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Kong 2020-3-11

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评论： Kong 2020-3-18

采纳的回答： Mahesh Taparia

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Hello.

I wanna centering an image (image 1 to image 2)

image 1 image 2

I got the image 1 from this code.

clear all
close all
%// read the video:
reader = VideoReader('lena_side.avi');
vid = {};
while hasFrame(reader)
    vid{end+1} = im2single(readFrame(reader));
end
%// simple background estimation using mean:
bg = mean( cat(4, vid{:}), 4);
%// estimate foreground as deviation from estimated background:
fIdx = 40; %// do it for frame 43
fg1 = sum( abs( vid{fIdx} - bg ), 3 ) > 0.25;
figure;
subplot(141); imshow( bg ); 
subplot(142); imshow( fg1 );

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采纳的回答

Mahesh Taparia 2020-3-17

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The image is gray scale with one object and the object is present in the right half of the image, so the usual approch could be to find the centroid of the object and shift the centroid of the object to the center of new image. New image should be the image consisting of zeros with same size of previous image.

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Mahesh Taparia 2020-3-18

编辑：Mahesh Taparia 2020-3-18

You can use the regionprops function on each frame, i.e in the for loop and do the necessary computation there. Save the resultant frame inside the loop.