compare two images in android

by

1. Check that the height matches, if not return false. Then, check if the width matches, and if not, return false. Then check each pixel until you find one that doesn’t match. When you do, return false. If every pixel matches, return true.

Pseudocode:

bool imagesAreEqual(Image i1, Image i2)
{
    if (i1.getHeight() != i2.getHeight()) return false;
    if (i1.getWidth() != i2.getWidth()) return false;

    for (int y = 0; y < i1.getHeight(); ++y)
       for (int x = 0; x < i1.getWidth(); ++x)
            if (i1.getPixel(x, y) != i2.getPixel(x, y)) return false;

    return true;
}

in reality, you probably want to treat the image as a two dimensional array if you can, and just compare bytes. I don’t know the Android image API, but getPixel might be slow.

2. maybe you convert the images in to byte64 Strings and then compare them.

3.**OpenCV lib for Android :
have to functions for images compression

**a. Core.absdiff() b. Core.compare()

for more details see comparing two images

More Related Contents:

  1. Convert a Bitmap to GrayScale in Android
  2. Converting YUV->RGB(Image processing)->YUV during onPreviewFrame in android?
  3. Convert bitmap array to YUV (YCbCr NV21)
  4. Camera preview image data processing with Android L and Camera2 API
  5. How to blur some portion of Image in Android?
  6. Displaying YUV Image in Android
  7. how to set the output image use com.android.camera.action.CROP
  8. Android: fast bitmap blur?
  9. how to fill color in image in particular area?
  10. Can’t import javax.imageio.ImageIO in Android application
  11. How do you get the RGB values from a Bitmap on Android?
  12. how to change the color of certain pixels in bitmap android
  13. How to do a fadein of an image on an Android Activity screen?
  14. Android OCR Library [closed]
  15. How to programmatically change contrast of a bitmap in android?
  16. Making Overlaid image transparent on touch in Android?
  17. App crashes when a button is clicked to load a webview
  18. error in android studio package android.veiw does not exist
  19. Why is the Android emulator so slow? How can we speed up the Android emulator? [closed]
  20. How set maximum date in datepicker dialog in android?
  21. Still getting warning : Configuration ‘compile’ is obsolete and has been replaced with ‘implementation’
  22. Using GSON to parse a JSON with dynamic “key” and “value” in android
  23. Removing Log call using proguard
  24. Android Image View Pinch Zooming [duplicate]
  25. How to set text size of textview dynamically for different screens [duplicate]
  26. How to set my sms app default in Android Kitkat?
  27. Google Drive API doesn’t play well with ProGuard (NPE)
  28. how to create a new AVD in eclipse?
  29. How can I change the color of header bar and address bar in the newest Chrome version on Lollipop?
  30. How to avoid an out of memory error while using bitmaps in Android

Leave a Comment