How can i somehow autofill black-spots in an RGB image.

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JAI PRAKASH 2018-6-4

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https://ww2.mathworks.cn/matlabcentral/answers/404025-how-can-i-somehow-autofill-black-spots-in-an-rgb-image

回答： Image Analyst 2018-6-5

采纳的回答： Aditya Adhikary

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Answer 1

Aditya Adhikary 2018-6-5

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These may help: imfill and regionfill.

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JAI PRAKASH 2018-6-5

编辑：JAI PRAKASH 2018-6-5

在 MATLAB Online 中打开

Hey Thanks, But it does not work for complex problems

I used following code:

    newimage=imread('City_AskAutofill.jpg');
    R = newimage(:,:,1); % splitting RGB because regionfill need grayscale.
    G = newimage(:,:,2);
    B = newimage(:,:,3);
    mask = uint8(R) < 2;
    mask = imfill(mask,'holes');
    mask = imerode(mask,strel('disk',10));
    mask = imdilate(mask,strel('disk',20));
    R_autofill = regionfill(R,mask);
    mask = uint8(G) < 2;
    mask = imfill(mask,'holes');
    mask = imerode(mask,strel('disk',10));
    mask = imdilate(mask,strel('disk',20));
    G_autofill = regionfill(G,mask);
    mask = uint8(B) < 2;
    mask = imfill(mask,'holes');
    mask = imerode(mask,strel('disk',10));
    mask = imdilate(mask,strel('disk',20));
    B_autofill = regionfill(B,mask);
    newimage_autofill(:,:,1)=R_autofill;
    newimage_autofill(:,:,2)=G_autofill;
    newimage_autofill(:,:,3)=B_autofill;
    imtool(newimage_autofill)  % this is the image which you are seeing above.

But this approach is not effective on other problem, like I have mentioned further below.

How can I improve this approach. Thanks

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Answer 2

Image Analyst 2018-6-5

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https://ww2.mathworks.cn/matlabcentral/answers/404025-how-can-i-somehow-autofill-black-spots-in-an-rgb-image#answer_323306

MATLAB does not have a sophisticated region filling algorithm like the bandage tool in Photoshop. If you want/need something like that, use Photoshop or figure out what algorithm they used and program it up yourself.