how can I detect black(specific) color in this image

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Alexai
Alexai am 1 Mär. 2022
Beantwortet: yanqi liu am 2 Mär. 2022
how can I detect black(specific) color in this image
I want to detect from color and draw a lot of bounding box of a suitable size so that the area is not clipped like image 111
  2 Kommentare
DGM
DGM am 1 Mär. 2022
Can you provide a copy of the test image without the annotations?
Alexai
Alexai am 1 Mär. 2022
I uploaded it again in the attached file.

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Antworten (1)

yanqi liu
yanqi liu am 2 Mär. 2022
img = imread('https://ww2.mathworks.cn/matlabcentral/answers/uploaded_files/910360/original%20image.jpg');
I = rgb2gray(img);
bw = ~imbinarize(I,'adaptive','ForegroundPolarity','dark','Sensitivity',0.35);
[L,~] = bwlabel(bw);
figure; imshow(img, []); hold on;
h = imshow(label2rgb(L));
set(h, 'AlphaData', 0.5);
bw2 = imclose(bw, strel('disk', 5));
bw2 = bwareaopen(bw2, 20);
[L2,~] = bwlabel(bw2);
stats = regionprops(L2);
hold on;
for i = 1 : length(stats)
hold on; rectangle('position', stats(i).BoundingBox, 'EdgeColor', 'g', 'LineWidth', 2)
end

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