adding VIEW_MODE_PIXELIZE to the 'image manipulations' sample

samples/android/image-manipulations/src/org/opencv/samples/imagemanipulations/ImageManipulationsActivity.java

@@ -16,6 +16,7 @@ public class ImageManipulationsActivity extends Activity {
     public static final int     VIEW_MODE_SOBEL = 3;
     public static final int     VIEW_MODE_BLUR  = 4;
     public static final int     VIEW_MODE_ZOOM  = 5;
+    public static final int     VIEW_MODE_PIXELIZE  = 6;
 
     private MenuItem            mItemPreviewRGBA;
     private MenuItem            mItemPreviewCanny;
@@ -23,8 +24,9 @@ public class ImageManipulationsActivity extends Activity {
     private MenuItem            mItemPreviewSobel;
     private MenuItem            mItemPreviewBlur;
     private MenuItem            mItemPreviewZoom;
+    private MenuItem            mItemPreviewPixelize;
 
-    public static int           viewMode        = VIEW_MODE_RGBA;
+    public static int           viewMode = VIEW_MODE_RGBA;
 
     public ImageManipulationsActivity() {
         Log.i(TAG, "Instantiated new " + this.getClass());
@@ -48,6 +50,7 @@ public class ImageManipulationsActivity extends Activity {
         mItemPreviewSobel = menu.add("Sobel");
         mItemPreviewBlur = menu.add("Blur");
         mItemPreviewZoom = menu.add("Zoom");
+        mItemPreviewPixelize = menu.add("Pixelize");
         return true;
     }
 
@@ -66,6 +69,8 @@ public class ImageManipulationsActivity extends Activity {
             viewMode = VIEW_MODE_BLUR;
         else if (item == mItemPreviewZoom)
             viewMode = VIEW_MODE_ZOOM;
+        else if (item == mItemPreviewPixelize)
+            viewMode = VIEW_MODE_PIXELIZE;
         return true;
     }
 }

samples/android/image-manipulations/src/org/opencv/samples/imagemanipulations/ImageManipulationsView.java

@@ -17,6 +17,9 @@ import android.util.Log;
 import android.view.SurfaceHolder;
 
 class ImageManipulationsView extends SampleCvViewBase {
+    private Size mSize0;
+    private Size mSizeRgbaInner;
+    
     private Mat mRgba;
     private Mat mGray;
     private Mat mIntermediateMat;
@@ -48,6 +51,7 @@ class ImageManipulationsView extends SampleCvViewBase {
             mGray = new Mat();
             mRgba = new Mat();
             mIntermediateMat = new Mat();
+            mSize0 = new Size();
         }
     }
 
@@ -66,6 +70,7 @@ class ImageManipulationsView extends SampleCvViewBase {
 
         if (mRgbaInnerWindow == null)
             mRgbaInnerWindow = mRgba.submat(top, top + height, left, left + width);
+        mSizeRgbaInner = mRgbaInnerWindow.size(); 
 
         if (mGrayInnerWindow == null && !mGray.empty())
             mGrayInnerWindow = mGray.submat(top, top + height, left, left + width);
@@ -132,6 +137,15 @@ class ImageManipulationsView extends SampleCvViewBase {
             Size wsize = mZoomWindow.size();
             Core.rectangle(mZoomWindow, new Point(1, 1), new Point(wsize.width - 2, wsize.height - 2), new Scalar(255, 0, 0, 255), 2);
             break;
+
+        case ImageManipulationsActivity.VIEW_MODE_PIXELIZE:
+            capture.retrieve(mRgba, Highgui.CV_CAP_ANDROID_COLOR_FRAME_RGBA);
+            if (mRgbaInnerWindow == null)
+                CreateAuxiliaryMats();
+            Imgproc.resize(mRgbaInnerWindow, mIntermediateMat, mSize0, 0.1, 0.1, Imgproc.INTER_NEAREST);
+            Imgproc.resize(mIntermediateMat, mRgbaInnerWindow, mSizeRgbaInner, 0., 0., Imgproc.INTER_NEAREST);
+            break;
+
         }
 
         Bitmap bmp = Bitmap.createBitmap(mRgba.cols(), mRgba.rows(), Bitmap.Config.ARGB_8888);