Improving resolution of a loaded image

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A 2011-5-29

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https://ww2.mathworks.cn/matlabcentral/answers/8398-improving-resolution-of-a-loaded-image

I am working with two routines that create images, and save them automatically with saveas (as .png files) to a folder. I then want read these images (with imread) with another program.

The trouble is that with the saveas function, I am having a massive loss of resolution of the images. When I read them with my new program, the image is so poor that it is useless. I do not, however, have this problem when I manually "save as" the image.

Is there any reason why the automated save as function would be decreasing the resolution? How could I remedy this in the saving, or is there a way to improve the resolution when I load the images in my new program?

Thank you!

Amina

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Walter Roberson 2011-5-29

I am not clear how this differs from your previous question http://www.mathworks.com/matlabcentral/answers/8347-loss-of-resolution-with-imread

If the images show up with full resolution when opened from the folder, there is no actual loss of resolution in the image, but there could be loss of resolution in how the second program displays the image.

A 2011-5-29

There is a loss of resolution immediately in the saved file, before it is called, when I am using saveas from the original program. The resolution is much better when I manually save, regardless of the file type. It is a very strange error..

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