Sharpen image, using Convolution Matrix

Example to sharpen image, on Android using Convolution Matrix.

Copy text picture in /res/drawable/ folder, name it testpicture.jpg.

package com.AndroidImageProcessing;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.os.Bundle;
import android.widget.ImageView;

public class AndroidImageProcessingActivity extends Activity {
 
 final static int KERNAL_WIDTH = 3;
 final static int KERNAL_HEIGHT = 3;
 
 int[][] kernalBlur ={
   {0, -1, 0},
   {-1, 5, -1},
   {0, -1, 0}
 };
 
 ImageView imageSource, imageAfter;
 Bitmap bitmap_Source;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        imageSource = (ImageView)findViewById(R.id.imageSource);
        imageAfter = (ImageView)findViewById(R.id.imageAfter);
        
        bitmap_Source = BitmapFactory.decodeResource(getResources(), R.drawable.testpicture);
        
        Bitmap afterSharpen = processingBitmap(bitmap_Source, kernalBlur);
        imageAfter.setImageBitmap(afterSharpen);
    }
    
    private Bitmap processingBitmap(Bitmap src, int[][] knl){
     Bitmap dest = Bitmap.createBitmap(
       src.getWidth(), src.getHeight(), src.getConfig());
     
     int bmWidth = src.getWidth();
     int bmHeight = src.getHeight();
     int bmWidth_MINUS_2 = bmWidth - 2;
     int bmHeight_MINUS_2 = bmHeight - 2;
     
     for(int i = 1; i <= bmWidth_MINUS_2; i++){
      for(int j = 1; j <= bmHeight_MINUS_2; j++){
       
       //get the surround 3*3 pixel of current src[i][j] into a matrix subSrc[][]
       int[][] subSrc = new int[KERNAL_WIDTH][KERNAL_HEIGHT];
       for(int k = 0; k < KERNAL_WIDTH; k++){
        for(int l = 0; l < KERNAL_HEIGHT; l++){
         subSrc[k][l] = src.getPixel(i-1+k, j-1+l);
        }
       }
       
       //subSum = subSrc[][] * knl[][]
       int subSumA = 0;
       int subSumR = 0;
       int subSumG = 0;
       int subSumB = 0;

       for(int k = 0; k < KERNAL_WIDTH; k++){
        for(int l = 0; l < KERNAL_HEIGHT; l++){
         subSumA += Color.alpha(subSrc[k][l]) * knl[k][l];
         subSumR += Color.red(subSrc[k][l]) * knl[k][l];
         subSumG += Color.green(subSrc[k][l]) * knl[k][l];
         subSumB += Color.blue(subSrc[k][l]) * knl[k][l];
        }
       }
       
       if(subSumA<0){
        subSumA = 0;
       }else if(subSumA>255){
        subSumA = 255;
       }
       
       if(subSumR<0){
        subSumR = 0;
       }else if(subSumR>255){
        subSumR = 255;
       }
       
       if(subSumG<0){
        subSumG = 0;
       }else if(subSumG>255){
        subSumG = 255;
       }
       
       if(subSumB<0){
        subSumB = 0;
       }else if(subSumB>255){
        subSumB = 255;
       }

       dest.setPixel(i, j, Color.argb(
         subSumA, 
         subSumR, 
         subSumG, 
         subSumB));
      } 
     }
     
     return dest;
    }

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />
    <ScrollView 
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">
        <LinearLayout 
            android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:orientation="vertical" >
         <TextView
             android:layout_width="fill_parent"
             android:layout_height="wrap_content"
             android:text="Original" />
      <ImageView
          android:id="@+id/imageSource" 
          android:layout_width="wrap_content"
          android:layout_height="wrap_content" 
          android:src="@drawable/testpicture"/>
      <TextView
             android:layout_width="fill_parent"
             android:layout_height="wrap_content"
             android:text="Result" />
      <ImageView
          android:id="@+id/imageAfter" 
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"/>
      
     </LinearLayout>
    </ScrollView>

</LinearLayout>

Related:
- Image processing on Android, the basic logic of Convolution Matrix.
- Apply Blur effect on Android, using Convolution Matrix
- Process image in background thread

Apply Blur effect on Android, using Convolution Matrix

Last article describe the basic logic of Convolution Matrix, it's used to apply Blur effect on Bitmap.

- The Kernal used for blur is:
{1, 1, 1
  1, 1, 1
  1, 1, 1}

- There are 9 '1' in the Kernal, so we have to divid the sum of each pixel by 9, to make it in the save level.

- Each color is limited within the range of 0~255.

- To make the blur effect more obviously, the processingBitmap of blur is called 5 times.

package com.AndroidImageProcessing;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.os.Bundle;
import android.widget.ImageView;

public class AndroidImageProcessingActivity extends Activity {
 
 final static int KERNAL_WIDTH = 3;
 final static int KERNAL_HEIGHT = 3;
 
 int[][] kernalBlur ={
   {1, 1, 1},
   {1, 1, 1},
   {1, 1, 1}
 };
 
 int DIV_BY_9 = 9;
 
 ImageView imageSource, imageAfter;
 Bitmap bitmap_Source;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        imageSource = (ImageView)findViewById(R.id.imageSource);
        imageAfter = (ImageView)findViewById(R.id.imageAfter);
        
        bitmap_Source = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
        
        Bitmap afterBlur = processingBitmap(bitmap_Source, kernalBlur);
        afterBlur = processingBitmap(afterBlur, kernalBlur);
        afterBlur = processingBitmap(afterBlur, kernalBlur);
        afterBlur = processingBitmap(afterBlur, kernalBlur);
        afterBlur = processingBitmap(afterBlur, kernalBlur);
        imageAfter.setImageBitmap(afterBlur);
    }
    
    private Bitmap processingBitmap(Bitmap src, int[][] knl){
     Bitmap dest = Bitmap.createBitmap(
       src.getWidth(), src.getHeight(), src.getConfig());
     
     int bmWidth = src.getWidth();
     int bmHeight = src.getHeight();
     int bmWidth_MINUS_2 = bmWidth - 2;
     int bmHeight_MINUS_2 = bmHeight - 2;
     
     for(int i = 1; i <= bmWidth_MINUS_2; i++){
      for(int j = 1; j <= bmHeight_MINUS_2; j++){
       
       //get the surround 3*3 pixel of current src[i][j] into a matrix subSrc[][]
       int[][] subSrc = new int[KERNAL_WIDTH][KERNAL_HEIGHT];
       for(int k = 0; k < KERNAL_WIDTH; k++){
        for(int l = 0; l < KERNAL_HEIGHT; l++){
         subSrc[k][l] = src.getPixel(i-1+k, j-1+l);
        }
       }
       
       //subSum = subSrc[][] * knl[][]
       int subSumA = 0;
       int subSumR = 0;
       int subSumG = 0;
       int subSumB = 0;

       for(int k = 0; k < KERNAL_WIDTH; k++){
        for(int l = 0; l < KERNAL_HEIGHT; l++){
         subSumA += Color.alpha(subSrc[k][l]) * knl[k][l];
         subSumR += Color.red(subSrc[k][l]) * knl[k][l];
         subSumG += Color.green(subSrc[k][l]) * knl[k][l];
         subSumB += Color.blue(subSrc[k][l]) * knl[k][l];
        }
       }
       
       subSumA = subSumA/DIV_BY_9;
       subSumR = subSumR/DIV_BY_9;
       subSumG = subSumG/DIV_BY_9;
       subSumB = subSumB/DIV_BY_9;
       
       if(subSumA<0){
        subSumA = 0;
       }else if(subSumA>255){
        subSumA = 255;
       }
       
       if(subSumR<0){
        subSumR = 0;
       }else if(subSumR>255){
        subSumR = 255;
       }
       
       if(subSumG<0){
        subSumG = 0;
       }else if(subSumG>255){
        subSumG = 255;
       }
       
       if(subSumB<0){
        subSumB = 0;
       }else if(subSumB>255){
        subSumB = 255;
       }

       dest.setPixel(i, j, Color.argb(
         subSumA, 
         subSumR, 
         subSumG, 
         subSumB));
      } 
     }
     
     return dest;
    }

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />
    <ScrollView 
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">
        <LinearLayout 
            android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:orientation="vertical" >
         <TextView
             android:layout_width="fill_parent"
             android:layout_height="wrap_content"
             android:text="Original" />
      <ImageView
          android:id="@+id/imageSource" 
          android:layout_width="wrap_content"
          android:layout_height="wrap_content" 
          android:src="@drawable/ic_launcher"/>
      <TextView
             android:layout_width="fill_parent"
             android:layout_height="wrap_content"
             android:text="Result" />
      <ImageView
          android:id="@+id/imageAfter" 
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"/>
      
     </LinearLayout>
    </ScrollView>

</LinearLayout>

Related:
- Sharpen image, using Convolution Matrix

Image processing on Android, the basic logic of Convolution Matrix.

At the beginning when I prepare the post "Create blur edge on bitmap, using BlurMaskFilter", I want to apply blur effect on bitmap actually. But I can't find any build-in API do so it! In the coming posts, I try to do it myself.

I found a page in http://docs.gimp.org/en/plug-in-convmatrix.html, it explain Convolution Matrix very clear and easy understand. So my first step is to implement the Convolution Matrix according to the example.

package com.AndroidImageProcessing;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class AndroidImageProcessingActivity extends Activity {
 
 final static int KERNAL_WIDTH = 3;
 final static int KERNAL_HEIGHT = 3;
 final static int MATRIX_WIDTH = 5;
 final static int MATRIX_HEIGHT = 5;
 
 int[][] kernal ={
   {0, 1, 0},
   {0, 0, 0},
   {0, 0, 0}
 };
 
 int[][] dataOriginal = {
   {35, 40, 41, 45, 50},
   {40, 40, 42, 46, 52},
   {42, 46, 50, 55, 55},
   {48, 52, 56, 58, 60},
   {56, 60, 65, 70, 75}
 };
 
 int[][] dataResult = new int[MATRIX_WIDTH][MATRIX_HEIGHT];
 
 TextView textOriginal, textResult;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        textOriginal = (TextView)findViewById(R.id.original);
        textResult = (TextView)findViewById(R.id.result);
        
        dataResult = convolution(dataOriginal, kernal);
        
        textOriginal.setText("dataOriginal:\n" + getDataString(dataOriginal) + "\n");
        textResult.setText("dataResult:\n" + getDataString(dataResult) + "\n");
    }
    
    private String getDataString(int[][] d){
     String s = "";
     
     for(int i = 0; i < d.length; i++){
      for(int j = 0; j < d[i].length; j++){
       s += " " + String.format("%02d", d[i][j]);
      }
      s += "\n"; 
     }
     
     return s;
    }
    
    private int[][] convolution(int[][] src, int[][] knl){
     int[][] convolutionResult = new int[MATRIX_WIDTH][MATRIX_HEIGHT];
     
     for(int i = 1; i <= src.length-2; i++){
      for(int j = 1; j <= src[i].length-2; j++){
       
       //get the surround 3*3 pixel of current src[i][j] into a matrix subSrc[][]
       int[][] subSrc = new int[KERNAL_WIDTH][KERNAL_HEIGHT];
       for(int k = 0; k < subSrc.length; k++){
        for(int l = 0; l < subSrc[k].length; l++){
         subSrc[k][l] = src[i-1+k][j-1+l]; 
        }
       }
       
       //subSum = subSrc[][] * knl[][]
       int subSum = 0;
       for(int k = 0; k < knl.length; k++){
        for(int l = 0; l < knl[k].length; l++){
         subSum += subSrc[k][l] * knl[k][l];
        }
       }

       convolutionResult[i][j] = subSum;
      } 
     }
     
     return convolutionResult;
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />
    <TextView
        android:id="@+id/original"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"/>
    <TextView
        android:id="@+id/result"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"/>

</LinearLayout>

Next:
- Apply Blur effect on Android, using Convolution Matrix
- Sharpen image, using Convolution Matrix
- Process image in background thread
- Edge Enhance
- Edge Detect
- Gaussian Blur
- Display image in full size
- Unsharp Mask (USM)
- Reduce bitmap by setting inSampleSize of BitmapFactory.Options
- Auto resize bitmap to fit View
- Image Processing with open JPG file dialog
- Inverse bitmap to generate film like picture
- Resize bitmap: Bitmap.createScaledBitmap vs BitmapFactory.Options.inSampleSize

Example of EmbossMaskFilter

EmbossMaskFilter(float[] direction, float ambient, float specular, float blurRadius) create an emboss maskfilter.

• direction: array of 3 scalars [x, y, z] specifying the direction of the light source
• ambient: 0...1 amount of ambient light
• specular: coefficient for specular highlights
• blurRadius: amount to blur before applying lighting

package com.AndroidBitmapProcessing;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.EmbossMaskFilter;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;

public class AndroidBitmapProcessingActivity extends Activity {
 
 ImageView imageView_Source, imageAfter;
 Bitmap bitmap_Source, bitmap_Dest;
 
 SeekBar ambientBar, specularBar, blurRadiusBar;
 TextView ambientText, specularText, blurRadiusText;
 Button doProcess;
 
 float ambientValue = 0.5f;
 float specularValue = 5.0f;
 float blurRadiusValue = 5.0f;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        imageView_Source = (ImageView)findViewById(R.id.source);
        imageAfter = (ImageView)findViewById(R.id.imageAfter);

        //bitmap_Source = BitmapFactory.decodeResource(getResources(), R.drawable.testpicture);
        bitmap_Source = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
        imageAfter.setImageBitmap(processingBitmap_Emboss(bitmap_Source));
        
        ambientBar = (SeekBar)findViewById(R.id.ambientBar);
        specularBar = (SeekBar)findViewById(R.id.specularBar);
        blurRadiusBar = (SeekBar)findViewById(R.id.blurRadiusBar);
     ambientText = (TextView)findViewById(R.id.ambientText);
     specularText = (TextView)findViewById(R.id.specularText);
     blurRadiusText = (TextView)findViewById(R.id.blurRadiusText);
        
        doProcess = (Button)findViewById(R.id.doProcess);
        
        ambientBar.setOnSeekBarChangeListener(ambientBarChangeListener);
        specularBar.setOnSeekBarChangeListener(specularBarChangeListener);
        blurRadiusBar.setOnSeekBarChangeListener(blurRadiusBarChangeListener);
        
        doProcess.setOnClickListener(doProcessClickListener);
        
    }
    
    OnClickListener doProcessClickListener
    = new OnClickListener(){

  @Override
  public void onClick(View v) {
   // TODO Auto-generated method stub
   imageAfter.setImageBitmap(processingBitmap_Emboss(bitmap_Source));
  }};
    
    OnSeekBarChangeListener ambientBarChangeListener
    = new OnSeekBarChangeListener(){

  @Override
  public void onProgressChanged(SeekBar seekBar, int progress,
    boolean fromUser) {
   ambientValue = progress/10f;
   ambientText.setText("ambient: " + String.valueOf(ambientValue));
  }

  @Override
  public void onStartTrackingTouch(SeekBar seekBar) {
   // TODO Auto-generated method stub
   
  }

  @Override
  public void onStopTrackingTouch(SeekBar seekBar) {
   // TODO Auto-generated method stub
   
  }
     
    };
    
    OnSeekBarChangeListener specularBarChangeListener
    = new OnSeekBarChangeListener(){

  @Override
  public void onProgressChanged(SeekBar seekBar, int progress,
    boolean fromUser) {
   // TODO Auto-generated method stub
   specularValue = progress/10f;
   specularText.setText("specular: " + String.valueOf(specularValue));
  }

  @Override
  public void onStartTrackingTouch(SeekBar seekBar) {
   // TODO Auto-generated method stub
   
  }

  @Override
  public void onStopTrackingTouch(SeekBar seekBar) {
   // TODO Auto-generated method stub
   
  }
     
    };
    
    OnSeekBarChangeListener blurRadiusBarChangeListener
    = new OnSeekBarChangeListener(){

  @Override
  public void onProgressChanged(SeekBar seekBar, int progress,
    boolean fromUser) {
   blurRadiusValue = progress/10f;
   blurRadiusText.setText("blurRadius: " + String.valueOf(blurRadiusValue));
   
  }

  @Override
  public void onStartTrackingTouch(SeekBar seekBar) {
   // TODO Auto-generated method stub
   
  }

  @Override
  public void onStopTrackingTouch(SeekBar seekBar) {
   // TODO Auto-generated method stub
   
  }
     
    };
    
    private Bitmap processingBitmap_Emboss(Bitmap src){
     int width = src.getWidth();
        int height = src.getHeight();

        EmbossMaskFilter embossMaskFilter;
        Paint paintEmboss = new Paint();
        
        Bitmap dest = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
     Canvas canvas = new Canvas(dest);

     Bitmap alpha = src.extractAlpha();
          
     embossMaskFilter = new EmbossMaskFilter(
       new float[] { 1, 1, 1 },
       ambientValue, 
       specularValue, 
       blurRadiusValue);
     
     paintEmboss.setMaskFilter(embossMaskFilter);
     canvas.drawBitmap(alpha, 0, 0, paintEmboss);
     
        return dest;
    }
    
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />
    <ScrollView 
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">
        <LinearLayout 
            android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:orientation="vertical" >
         <TextView
             android:layout_width="fill_parent"
             android:layout_height="wrap_content"
             android:text="Original" />
      <ImageView
          android:id="@+id/source" 
          android:layout_width="wrap_content"
          android:layout_height="wrap_content" 
          android:src="@drawable/ic_launcher"/>
      <TextView
             android:layout_width="fill_parent"
             android:layout_height="wrap_content"
             android:text="Result" />
      <ImageView
          android:id="@+id/imageAfter" 
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"/>
      
   <SeekBar
       android:id="@+id/ambientBar"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:paddingLeft="10dp"
       android:paddingRight="10dp"
       android:max="10"
       android:progress="5"/>
   <TextView
       android:id="@+id/ambientText"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:text="ambient: 0.5"/>
   
   <SeekBar
       android:id="@+id/specularBar"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:paddingLeft="10dp"
       android:paddingRight="10dp"
       android:max="100"
       android:progress="50"/>
   <TextView
       android:id="@+id/specularText"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:text="specular: 5"/>
   
   <SeekBar
       android:id="@+id/blurRadiusBar"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:paddingLeft="10dp"
       android:paddingRight="10dp"
       android:max="100"
       android:progress="50"/>
   <TextView
       android:id="@+id/blurRadiusText"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:text="blurRadius: 5"/>
   
   <Button
       android:id="@+id/doProcess"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:text="Do Process"/>
     </LinearLayout>
 </ScrollView>
</LinearLayout>

Create blur edge on bitmap, using BlurMaskFilter.

The android.graphics.BlurMaskFilter class takes a mask, and blurs its edge by the specified radius. This example show how to make blur bitmap inner, and blur white outer edge.

package com.AndroidBitmapProcessing;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BlurMaskFilter;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;

public class AndroidBitmapProcessingActivity extends Activity {
 
 ImageView imageView_Source, imageAfter;
 Bitmap bitmap_Source, bitmap_Dest;
 
 SeekBar blurBar;
 TextView blurText;
 Button doProcess;
 
 int blurValue = 1;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        imageView_Source = (ImageView)findViewById(R.id.source);
        imageAfter = (ImageView)findViewById(R.id.imageAfter);

        //bitmap_Source = BitmapFactory.decodeResource(getResources(), R.drawable.testpicture);
        bitmap_Source = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
        imageAfter.setImageBitmap(processingBitmap_Blur(bitmap_Source));
        
        blurBar = (SeekBar)findViewById(R.id.blurBar);
        blurText = (TextView)findViewById(R.id.blurText);
        doProcess = (Button)findViewById(R.id.doProcess);
        
        blurBar.setOnSeekBarChangeListener(blurBarChangeListener);
        doProcess.setOnClickListener(doProcessClickListener);
        
    }
    
    OnClickListener doProcessClickListener
    = new OnClickListener(){

  @Override
  public void onClick(View v) {
   // TODO Auto-generated method stub
   imageAfter.setImageBitmap(processingBitmap_Blur(bitmap_Source));
  }};
    
    OnSeekBarChangeListener blurBarChangeListener
    = new OnSeekBarChangeListener(){

  @Override
  public void onProgressChanged(SeekBar seekBar, int progress,
    boolean fromUser) {
   blurValue = progress+1;
   blurText.setText(String.valueOf(blurValue));
  }

  @Override
  public void onStartTrackingTouch(SeekBar seekBar) {
   // TODO Auto-generated method stub
   
  }

  @Override
  public void onStopTrackingTouch(SeekBar seekBar) {
   // TODO Auto-generated method stub
   
  }
     
    };

    private Bitmap processingBitmap_Blur(Bitmap src){
     int width = src.getWidth();
        int height = src.getHeight();
        
     BlurMaskFilter blurMaskFilter;
     Paint paintBlur = new Paint();
     
     Bitmap dest = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
     Canvas canvas = new Canvas(dest); 
     
     //Create background in White
     Bitmap alpha = src.extractAlpha();
     paintBlur.setColor(0xFFFFFFFF);
     canvas.drawBitmap(alpha, 0, 0, paintBlur);
     
     //Create outer blur, in White
     blurMaskFilter = new BlurMaskFilter(blurValue, BlurMaskFilter.Blur.OUTER);
     paintBlur.setMaskFilter(blurMaskFilter);
     canvas.drawBitmap(alpha, 0, 0, paintBlur);
     
     //Create inner blur
     blurMaskFilter = new BlurMaskFilter(blurValue, BlurMaskFilter.Blur.INNER);
     paintBlur.setMaskFilter(blurMaskFilter);
     canvas.drawBitmap(src, 0, 0, paintBlur);
     
     
     
     return dest;
    }

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />
    <ScrollView 
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">
        <LinearLayout 
            android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:orientation="vertical" >
         <TextView
             android:layout_width="fill_parent"
             android:layout_height="wrap_content"
             android:text="Original" />
      <ImageView
          android:id="@+id/source" 
          android:layout_width="wrap_content"
          android:layout_height="wrap_content" 
          android:src="@drawable/ic_launcher"/>
      <TextView
             android:layout_width="fill_parent"
             android:layout_height="wrap_content"
             android:text="Result" />
      <ImageView
          android:id="@+id/imageAfter" 
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"/>
   <SeekBar
       android:id="@+id/blurBar"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:max="99"
       android:progress="0"/>
   <TextView
       android:id="@+id/blurText"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:text="1"/>
   <Button
       android:id="@+id/doProcess"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:text="Do Process"/>
     </LinearLayout>
 </ScrollView>
</LinearLayout>