Simple Image Sharpening algorithm for Android App

Question

I am looking for a simple image sharpening algorithm to use in my Android application. I have a grayscale image captured from video (mostly used for text) and I would like to sharpen it because my phone does not have auto focus, and the close object distance blurs the text. I don't have any background in image processing. But as a user, I am familiar with unsharp masking and other sharpening tools available in Gimp, Photoshop, etc. I didn't see any support for image processing in the Android API, and hence am looking for a method to implement myself. Thanks.

Answer 1

ImageJ has many algorithms in Java and is freely available.

Answer 2

If you have access to pixel information, your most basic option woul be a sharpening convolution kernel. Take a look at the following sites, you can learn more about sharpening kernels and how to apply kernels there.

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