how can i detect sky
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Hello
I want to detect sky in a image and chang it colour to black.How can i do that?
For example this image:
4 件のコメント
Adam Danz
2022 年 3 月 29 日
編集済み: Adam Danz
2022 年 3 月 29 日
@Eren Aslan for your simple image of a nearly uniform background, I would start with regionprops to segment the plane and then assume everything else is sky (including the ocean in my image above). However, it will not work with more complex backgrounds.
Sam Chak
2022 年 3 月 29 日
@Eren Aslan Are you trying to develop the MATLAB-based "Magic Wand"? Sound like an interesting project!
回答 (1 件)
yanqi liu
2022 年 3 月 30 日
yes,sir,for more image,may be use DeepLearning to segment
but just for this image,we can use some simple method,such as
im = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/945114/image.jpeg');
jm = rgb2lab(im);
s = imcomplement(mat2gray(jm(:,:,3)));
bw = im2bw(s, graythresh(s));
im2 = im;
% make sky to black
r = im2(:,:,1);g = im2(:,:,2);b = im2(:,:,3);
r(bw) = 0; g(bw) = 0; b(bw) = 0;
im2 = cat(3,r,g,b);
figure;
subplot(2,2,1); imshow(im,[]);
subplot(2,2,2); imshow(s,[]);
subplot(2,2,3); imshow(bw,[]);
subplot(2,2,4); imshow(im2,[]);
参考
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