ScanLibrary

ScanLibrary is an android document scanning library built on top of OpenCV, using the app you will be able to select the exact edges and crop the document accordingly from the selected 4 edges and change the perspective transformation of the cropped image.

Screenshots

Using it in your project

• git clone https://github.com/jhansireddy/AndroidScannerDemo.git into a standalone dir;

• Create or using your project: File -> New -> Import module...;

• As source directory point to: ~/_dirWhereYouClonedAndroidScannerDemo_/AndroidScannerDemo/ScanDemoExample/scanlibrary and confirm;

• Add the dependency to your main app build.gradle this way:

  compile project(':scanlibrary')

• In your activity or fragment when you want to give an option of document scanning to user then: Start the scanlibrary ScanActivity, with this the app will go to library, below is the sample code snippet: Note: preference can be one of OPEN_CAMERA or OPEN_MEDIA or left empty, based on the passed preference the scan library decides to open camera or media or open the scan home page.

     int REQUEST_CODE = 99;
     int preference = ScanConstants.OPEN_CAMERA;
     Intent intent = new Intent(this, ScanActivity.class);
     intent.putExtra(ScanConstants.OPEN_INTENT_PREFERENCE, preference);
     startActivityForResult(intent, REQUEST_CODE);

• Once the scanning is done, the application is returned from scan library to main app, to retrieve the scanned image, add onActivityResult in your activity or fragment from where you have started startActivityForResult, below is the sample code snippet:

  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
      super.onActivityResult(requestCode, resultCode, data);
      if (requestCode == REQUEST_CODE && resultCode == Activity.RESULT_OK) {
          Uri uri = data.getExtras().getParcelable(ScanConstants.SCANNED_RESULT);
          Bitmap bitmap = null;
          try {
              bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
              getContentResolver().delete(uri, null, null);
              scannedImageView.setImageBitmap(bitmap);
          } catch (IOException e) {
              e.printStackTrace();
          }
      }
  }

  License

  Copyright (c) 2016 Jhansi Karee

  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

• IMPORTANT: This project uses the OPENCV Framework. Download the newest version here 'http://opencv.org/.