Tracking and detecting of colors

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Emmanuel 2014-6-16

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/134680-tracking-and-detecting-of-colors

评论： Image Analyst 2014-6-17

采纳的回答： Image Analyst

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Hi all! I would like you to clarify me on these questions plz

If I calibrate my camera to a particular resolution say 640x360, can I use it for another resolution like 1024x768?

Also I want to know as to how many centimeters does 1 pixel contain in my image. It varies from system to system., How do I find that?. Also, it is not definitely square. SoI hsve to find the length and width of it.

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Answer 1

Image Analyst 2014-6-16

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链接

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https://ww2.mathworks.cn/matlabcentral/answers/134680-tracking-and-detecting-of-colors#answer_141169

spatial_calibration_demo.m

See my spatial calibration demo, attached.

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Emmanuel 2014-6-16

Hey thanks a lot!! That was awesome.. But I cannot use your code..Can you please help me clarify my doubts above?

Thank you!

Image Analyst 2014-6-17

You have to measure something you know, such as a ruler.

If you change the resolution and the field of view stays the same then obviously you can't use the same spatial calibration and will need a new one that properly takes into account the different number of pixels spanning your real world field of view.

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