how to determine if an image has an object or empty

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kaz
kaz 2016-6-5
回答： Image Analyst 2016-6-16
i want to do shape detection however i was wondering if i would able to make the system able to determine if the image has an object or its an empty image. if yes, which method should i use? thanks in advance
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kaz
kaz 2016-6-16
as it shows in the following figures, the first image has two objects detected, i want the system to define if the object was not detected as shown in image 2 so i can state conditions for it such as if the object 1 is not detected, then show (condition).
Walter Roberson
Walter Roberson 2016-6-16
How should your code know if it is object 1 that is missing or object 2 that is missing? Are the objects always in the same place?
If you just want to know how many objects you have, then bwlabel() the thresholded image and look at the second output num of bwlabel()

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回答（2 个）

Walter Roberson
Walter Roberson 2016-6-5
Image Analyst
Image Analyst 2016-6-16
Try this, like Walter said:
[~, numberOfObjects] = bwlabel(binaryImage);

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