Equaligram

Android Histogram Equalizer with Android NDK for faster performance.

What is Histogram Equalization

Histogram equalization is a image processing process that project images' histogram so they are spreaded evenly. This process may be required in order to make an image processable by computers.

More information about Histogram Equalization: https://en.wikipedia.org/wiki/Histogram_equalization

What is Equaligram

Equaligram is a Histogram Equalizer Android Application that has four main histogram equalizing algorithm. Equaligram is developed by using Android NDK (https://developer.android.com/tools/sdk/ndk/index.html) to achieve better performance than if it uses dalvik or art.

Building

We use Android Studio 1.3 to develop and build this project. You may need Android Studio 1.3 or later to open and build this project.

You may need MinGW or Cygwin to debug NDK Applications.

Screen shoots

Equaligram has four algorithm that you can select:

Pre-processed image and its histogram:

Post-processed image and its histogram, there are also some parameter sliders to find optimum value:

License