torcellite/imagecomparator

Comparing images with OpenCV on Android

Image Comparator

Image comparator which computes similarity between images to detect duplicates on the Android platform. It uses the OpenCV manager and different algorithms to compare images and help you find an optimized method to detect duplicate images for your application. Image comparison is optimized with the following parameters:

1. Minimum distance between keypoints described to be accepted as duplicates. The lower the minimum distance matches, the higher the chances of the images being duplicate.
2. Different algorithms for varying speed and accuracy. ORB, BRIEF, BRISK and FREAK. Only PYRAMID_FAST FeatureDetector is being used as of now to increase speed.
3. SURF and SIFT aren't available in the open source package since they're patented algorithms.

Quick Use

For finding images which are EXACTLY the same except for compressiong and format, use BRISK with a hamming distance of 10 and a minimum number of good matches of 750.

How to use

Download the code and export it as an Android application or download it from [here] (http://dl.dropboxusercontent.com/u/28378535/imageComparator.apk). Once you have installed imageComparator, please download OpenCV Manager2.4.4 for Android. Select the images you'd like to compare and change the minimum distance and algorithm to be used in settings and start processing. Once done you can add the results to the log. After enough input, you can statistically find out what the best algorithm and minimum distance for your implementation would be.

It is used in my application [WhatsAppDuplicateMediaRemover] (http://play.google.com/store/apps/details?id=com.torcellite.whatsappduplicatemediaremover)

To be added/fixed

[ADD]Graphing log files on a server

Screenshots

License

You have all rights to use this project, but please feel obligated to give due credit.

Contribute

Fork the project and do a pull request. I will merge your changes back into the main project. Many reforms are needed so feel free.

-- Torcellite

imagecomparator's Issues

Error on Mat()

The code having issue with Mat() initialisation. I'm using the exact version of 2.4.4.
Please check the screen shot and help me to work it. Thanks

SURF DescriptorExtractor error

Same photo with different brightness

Thanks for the great effort. Need some help to solve the below mentioned issue.
I have noticed that if we use the same photo with different brightness it consider that two photos as "Not duplicates".
I have tried below example, but didn't work.
Imgproc.cvtColor(img1, img1, Imgproc.COLOR_RGB2HSV);
Imgproc.cvtColor(img2, img2, Imgproc.COLOR_RGB2HSV);

Could you please help me with this ?
Thanks!

Installation problem facing

Hi,
I've tried to install the package onto my android device but it didn't get installed....Sir what could be the problem i'm not understanding it.
Can you help me on this....Thanks