the resolution for one pixel

2012 3 27
2 个回答
2 次查看（30 天）

0 个投票

Hello, I have image in Matlab, how can I know the resolution for one pixel, if every pixel 1 mm or more, I mean how can I measure on the image. Thank you very much

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回答（2 个）

Jan
Jan 2012-3-27

0 个投票

You can't. An image is represented as a 3D RGB array, but there is no information about the resolution - usually.
If you think, that it is possible in theory to determine the resolution, please specify the expression "I have image in Matlab".
Image Analyst
Image Analyst 2012-3-27

0 个投票

You have to measure some known thing in your image, such as a ruler or meter stick. Then calculate the number of pixels per mm, or mm per pixel. Then you have a calibration factor that you can divide or multiply respectively to get your answer in mm.

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