How i can extract feature point using "extractFeatures" function?

2017 3 30
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更新时间：2017 3 31
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Hello there, I am trying to use the computer vision toolbox, to detect some object surface. this is a snapshot of my code, i used the code that shared on the documentation of the toolbox. but i have an error with extractFeatures function. when i searched throw the description i find that it works with binary images; is that right? -------------

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Walter Roberson
Walter Roberson 2017-3-30
Please show the complete error message, everything in red.
Question: is your boxImage grayscale or color (RGB) ?
Sanaa Asal
Sanaa Asal 2017-3-31
yes that was my wrong. thanks alot for your note.

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