Android Open Source - Operation-Valkyrie Grayscale

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License

The source code is released under:

Terms and conditions Preamble: This Agreement, signed on Jun 10, 2012 [hereinafter: Effective Date] governs the relationship between the Enduser, a private person, (hereinafter: Licensee) and Paul N...

Java Source Code

/**
 * /* www  . jav a  2 s .com*/
 * COPYRIGHT: Paul Neuhold, Laurenz Theuerkauf, Alexander Ritz, Jakob Schweighofer, Milo Tischler
 * ? Milo Tischler, Jakob Schweighofer, Alexander Ritz, Paul Neuhold, Laurenz Theuerkauf
 * 
 */

package valkyrie.filter.grayscale;

import org.opencv.android.Utils;
import org.opencv.core.Mat;
import org.opencv.highgui.Highgui;
import org.opencv.imgproc.Imgproc;

import valkyrie.filter.FilterAssets;
import valkyrie.filter.FilterInternalStorage;
import valkyrie.filter.IFilter;
import valkyrie.main.R;
import valkyrie.ui.MainActivity;
import android.app.Activity;
import android.graphics.Bitmap;
import android.util.Log;
import android.view.LayoutInflater;
import android.widget.TableLayout;

/**
 * A Filter for the Camera.
 * The Camera Image is processed trough this Filter when active.
 * 
 * In this Case the image is converted to grey scale.
 */
public class Grayscale implements IFilter {

  /**
   * The definition of this Filter, its name.
   */
  private static final String TAG = "Grayscale";

  /**
   * Setup the storage for this Filter.
   * 
   * @param filterInternalStorage
   *            FilterInternalStorage, object that manages the image storage for the Filter
   * @param filterAssets
   *            FilterAssets, manages any needed Files for the Filter
   * @param firstRun
   *            Boolean, defines whether its the first run of the app or not
   */
  public void setup(FilterInternalStorage filterInternalStorage, FilterAssets filterAssets, Boolean firstRun) {

  }

  /**
   * Returns the Name of this Filter.
   * 
   * @return String the name of this Filter
   */
  public String getName() {
    return this.getClass().getSimpleName();
  }

  /**
   * Returns the Icon of this Filter.
   * 
   * @return
   */
  public Bitmap getIcon() {
    return null;
  }

  /**
   * Processes the PreviewImage and adds an effect.
   * In this case the image is converted to a grey scale image.
   * 
   * @param bitmapMat
   *            Mat (OpenCV), Matrix representation of the image to be processed.
   * @return Bitmap the manipulated Bitmap.
   */
  public Bitmap manipulatePreviewImage(Mat bitmapMat) {
    Imgproc.cvtColor(bitmapMat, bitmapMat, Imgproc.COLOR_GRAY2RGBA, 4);

    Bitmap bitmap = Bitmap.createBitmap(bitmapMat.cols(), bitmapMat.rows(), Bitmap.Config.ARGB_8888);
    Utils.matToBitmap(bitmapMat, bitmap);
    bitmapMat.release();

    return bitmap;
  }

  /**
   * Processes the final Image and adds an effect.
   * In this case the image is converted to a greyscale image.
   * 
   * @param bitMap
   *            Mat (OpenCV), Matrix representation of the image to be processed.
   * @return Bitmap the manipulated Bimap.
   */
  public Bitmap manipulateImage(Mat bitmapMat) {
    Imgproc.cvtColor(bitmapMat, bitmapMat, Imgproc.COLOR_GRAY2RGBA, 4);

    Bitmap bitmap = Bitmap.createBitmap(bitmapMat.cols(), bitmapMat.rows(), Bitmap.Config.ARGB_8888);
    Utils.matToBitmap(bitmapMat, bitmap);
    bitmapMat.release();

    return bitmap;
  }

  /**
   * Returns the Format of the CameraImage.
   * 
   * @return int the ImageFormat of the Camera
   */
  public int getFilterCaptureFormat() {
    return Highgui.CV_CAP_ANDROID_GREY_FRAME;
  }

  /**
   * Returns the defined UI-Elements for the Options Panel as whole RelativeLayout.
   * 
   * @param mainActivity
   *            Activity, the main activity of the Program. Gives us access to the LayoutInflater.
   */
  public TableLayout getUIElements(Activity mainActivity) {
    final LayoutInflater inflater = (LayoutInflater) mainActivity
        .getSystemService(MainActivity.LAYOUT_INFLATER_SERVICE);

    return (TableLayout) inflater.inflate(R.layout.greyscale, null);
  }

  /**
   * Does the image conversion to grey scale
   * 
   * @deprecated effect not used anymore
   * @param bitmapMat
   *            Mat (OpenCV), Matrix representation of the image used as input
   * @return Bitmap the manipulated Bitmap
   */
  private Bitmap toGrayscale(Mat bitmapMat) {
    if (bitmapMat == null) {
      Log.e(TAG, "Bitmap Mat is null");
    }

    Bitmap bitmap = Bitmap.createBitmap(bitmapMat.cols(), bitmapMat.rows(), Bitmap.Config.ARGB_8888);

    Imgproc.cvtColor(bitmapMat, bitmapMat, Imgproc.COLOR_BGR2GRAY);
    Imgproc.cvtColor(bitmapMat, bitmapMat, Imgproc.COLOR_GRAY2RGBA, 4);

    Utils.matToBitmap(bitmapMat, bitmap);

    bitmapMat.release();

    return bitmap;
  }
}

Java Source Code List

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