Blur images using Java?

Question

I want to blur a picture and then slowly to make it focus.

I want to do it with java, there is any open source that do this?

I found some open sources that blur the picture but none that do the reverse.

Answer 1

Have a read about (or Google) Convolution Filters - it's basically a way of changing a pixels value based on the values of the pixels around it. So apart from blurring, you can also do things like image sharpening, line-finding etc.

Answer 2

Java FX 2 has some methods to apply a blur effect - see for example this tutorial . The example can be adapted to blur an image instead of text.

You can blur your image then progressively "unblur" it to make it look more focused.