MATLAB: How to get normalized silhouette image from video

normalized silhouette image

I want to get normalized silhouette image.
However, I got this images when I use the below code.
Figure 1 Figure 2
Figure 3 (I want to get this image that normalized at the center of the image)
function Y=normalize8(X)
%% Init. operations
X=double(X);
[a,b]=size(X);
%% Adjust the dynamic range to the 8-bit interval
max_v_x = max(max(X));
min_v_x = min(min(X));
Y=ceil(((X - min_v_x*ones(a,b))./(max_v_x*(ones(a,b))-min_v_x*(ones(a,b))))*255);
end
clear all
close all
RGB = imread('weighted17.jpg');
I = rgb2gray(RGB);
figure
imshow(I)
Y=normalize8(I)
figure
imshow(Y)

Best Answer

Use
mask = bwareafilt(mask, 1);
to extract the largest blob.
Or take blobs just 64 pixels and bigger with this:
mask = bwareafilt(mask, [64, inf]);
But the BIG problem is that the image seems to be either an indexed or dithered image, or an image that had all the quality JPEG'ed out of it. NEVER use JPG images for image analysis. See if you can get the full resolution, uncompressed version of the image somehow. This image is virtually useless.
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