how do i segment the attached image based on color?

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Md. Motiur Rahman
Md. Motiur Rahman 2018-5-18
评论： Md. Motiur Rahman 2018-5-21
i need to select the only fruit region and extract various color feature. That is why i need to segment the image and select only fruit region. Please give me your suggestion in this regard.
  1 个评论
Md. Motiur Rahman
Md. Motiur Rahman 2018-5-19
编辑：Md. Motiur Rahman 2018-5-20
I have done the segmentation and able to select the fruit region. i also get the Pixel Id list of the selected fruit region here thisBlobsPixels = blobMeasurements(k).PixelIdxList; Now how can i use this pixel id list to compute various color channel (red channel, green channel, blue channel) of the selected region. The attached image is gray scale image. Thanks in advance.

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回答（1 个）

KALYAN ACHARJYA
KALYAN ACHARJYA 2018-5-20
编辑：KALYAN ACHARJYA 2018-5-20 
    % code
input_image=imread('banana.png');
pattern=repmat(all(~input_image,3),[1 1 3]); 
%convert to white pixels
input_image(pattern)=255; 
imshow(input_image);
  2 个评论
KALYAN ACHARJYA
KALYAN ACHARJYA 2018-5-20
By doing loop, you can find the R,G,B of any pixels.
input_image(i,j,1) % gives R value of respective pixel;
input_image(i,j,2) % gives G value of respective pixel;
input_image(i,j,3) % gives B value of respective pixel;
Md. Motiur Rahman
Md. Motiur Rahman 2018-5-21
i only have pixel id list not x, y coordinates of pixel.
thisBlobsPixels = blobMeasurements(k).PixelIdxList;
it returns all pixel id list in one dimensional array.

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