find multiple objects and their number in an image

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Liliana Malik 2018-3-12

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https://ww2.mathworks.cn/matlabcentral/answers/387718-find-multiple-objects-and-their-number-in-an-image

评论： Image Analyst 2018-3-13

I am working on a project that classifies beans in an image how can i do that and how can i tell the number of beans of each type.

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KALYAN ACHARJYA 2018-3-12

编辑：KALYAN ACHARJYA 2018-3-12

在 MATLAB Online 中打开

When you classify it based on image segmentation (Apply various variable thresholding techniques) and count the number of objects within an image.

[label_Image, numberofObject]=bwlabel(segmented_binaryImage);

Liliana Malik 2018-3-12

feculent.jpg

this is a sample image it's not exactly what i'm going to do cause the exact number of beans for some types is uncountable in this image, the image i'm going to work with will have less beans

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Answer 1

Image Analyst 2018-3-12

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https://ww2.mathworks.cn/matlabcentral/answers/387718-find-multiple-objects-and-their-number-in-an-image#answer_309696

See my image segmentation tutorial in my File Exchange.

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Image Analyst 2018-3-13

在 MATLAB Online 中打开

Create a feature vector for each pixel that includes the mean hue, saturation, and value in a window around the pixel plus the standard deviation of the values in the window. Use rgb2hsv() and conv2() and stdfilt().

hsvImage = rgb2hsv(rgbImage);
hImage = hsvImage(:, :, 1);
sImage = hsvImage(:, :, 2);
vImage = hsvImage(:, :, 3);
windowsSize = 21; % Some odd number.
kernel = ones(windowSize, windowSize)/windowSize^2;
localMeanH = conv2(hImage, kernel, 'same');
localMeanS = conv2(sImage, kernel, 'same');
localMeanV = conv2(vImage, kernel, 'same');
% Now use stdfilt
localSDH = stdfilt(hImage, ..... etc.