How to preprocess this image.?

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Karthik K
Karthik K 2019-3-28
移动：Rik 2022-12-30
Hello. I am preprocessing the image using convexhull method. Initial and intermediate methods are fine. The last method in displaying preprocessing image I am not getting the required display. I need only the rounded coins to get displayed at the end of preprocessed image without any black pixels. But it is displaying only with white pixel values. Pixel vales are copied properly from the original image(I) to preprocessed Image(PI). I am executing with the following code.
clc;clear;
subplot(2,3,1);
I = imread('coins.png');
imshow(I);
title('Original');
subplot(2,3,2);
BW = imbinarize(I);
imshow(BW);
title('Binary');
subplot(2,3,3);
CH = bwconvhull(BW);
imshow(CH);
title('Union Convex Hull');
subplot(2,3,4);
CH_objects = bwconvhull(BW,'objects');
imshow(CH_objects);
title('Objects Convex Hull');
for a=1:size(I,1)
for b=1:size(I,2)
if(CH_objects(a,b)==0)
PI(a,b)=1;
else
PI(a,b)=I(a,b);
end
end
end
subplot(2,3,5);
imshow(PI);
title('Preprocessed Image');
  1 个评论
S WASIQUE ALI
S WASIQUE ALI 2022-5-6
移动：Rik 2022-12-30
I want to process the backround and foreground separately. For background i want to threshold the Intensity value Intensity value <1 to be zero and rest of the Intensity value should remain unaltered. please help me out with some code

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采纳的回答

Catalytic
Catalytic 2019-3-28
编辑：Catalytic 2019-3-28
PI=I;
PI(~CH_objects)=255;
imshow(PI);
title('Preprocessed Image');
Capture.PNG

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