i try to use bwlabel, but there error that i can't fix

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ElizabethR
ElizabethR 2016-3-1
评论： Image Analyst 2016-3-2
>> BW=imread('b.jpg');
>> L=bwlabel(BW);
Error using bwlabel
Expected input number 1, BW, to be two-dimensional.
...
please help

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采纳的回答

Walter Roberson
Walter Roberson 2016-3-2
jpg files are almost always RGB images even if they look like black and white. You need to rgb2gray() the content and perhaps im2bw() the result.

更多回答（1 个）

Image Analyst
Image Analyst 2016-3-1
You call it BW but it's most likely not a binary image. It's probably gray scale or color. You need to binarize your grayscale image first. For example threshold it
grayImage = imread(filename);
BW = grayImage < 100;

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