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function from Image

Posted Jul 6, 2023, 1:21 a.m. EDT 1 Reply

Jie Li
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I define a fuction from an image. However, I find the accuracy of my original image has been compressed. I hope every pixel is consevered. What should I do?

1 Reply Last Post Jul 6, 2023, 4:43 p.m. EDT
Jeff Hiller COMSOL Employee

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Posted: 10 months ago Jul 6, 2023, 4:43 p.m. EDT
Updated: 10 months ago Jul 7, 2023, 2:05 p.m. EDT

Hi Jie,

Make sure your computational mesh is sufficiently fine when you call the function, so that it samples the image data properly. I find the "Plot" button on the function window useful as a preview, but you can get the data sampled finer by using a fine computational mesh.

Jeff

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Jeff Hiller
Hi Jie, Make sure your computational mesh is sufficiently fine when you call the function, so that it samples the image data properly. I find the "Plot" button on the function window useful as a preview, but you can get the data sampled finer by using a fine computational mesh. Jeff

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