Color Boost the image(Bitmap) in ImageView (Android)

Before Color Boost

After Color Boost

type=1,percent=60

type=2,percent=60

type=3,percent=60

Create new Android Project

Project Name: PlayingwithBitmaps

Build Target: Android 2.3.3   //or greater than that

Application Name: PlayingwithBitmaps

Package Name: com.hamad.playingwithbitmaps

Create Activity: Main

Min SDK: 10 // or greater than that

  1. create main layout:

• One image view to display the image.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#000000"
    android:id="@+id/rlMain" >

    <ImageView
        android:id="@+id/imViewAndroid"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:src="@drawable/beautiful" />

</RelativeLayout>

 2. code of main activity:

package com.shaikhhamadali.blogspot.playingwithbitmaps;

import android.os.Bundle;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BlurMaskFilter;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.BlurMaskFilter.Blur;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.view.Menu;
import android.widget.ImageView;

public class Main extends Activity {
 ImageView imViewAndroid;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  imViewAndroid = (ImageView) findViewById(R.id.imViewAndroid);
  imViewAndroid.setImageBitmap(boostColor(BitmapFactory.decodeResource(getResources(), R.drawable.android_droid),1,90));
 }
 public Bitmap boostColor(Bitmap src, int type, float percent) {
  // original image size
  int width = src.getWidth();
  int height = src.getHeight();
  // create output bitmap
  Bitmap bmOut = Bitmap.createBitmap(width, height, src.getConfig());
  // color information
  int A, R, G, B;
  int pixel;
  // scan through all pixels
  for(int x = 0; x < width; ++x) {
   for(int y = 0; y < height; ++y) {
    // get pixel color
    pixel = src.getPixel(x, y);
    A = Color.alpha(pixel);
    R = Color.red(pixel);
    G = Color.green(pixel);
    B = Color.blue(pixel);
    if(type == 1) {
     R = (int)(R * (1 + percent));
     if(R > 255) R = 255;
    }
    else if(type == 2) {
     G = (int)(G * (1 + percent));
     if(G > 255) G = 255;
    }
    else if(type == 3) {
     B = (int)(B * (1 + percent));
     if(B > 255) B = 255;
    }
    // apply new pixel color to output bitmap
    bmOut.setPixel(x, y, Color.argb(A, R, G, B));
   }
  }
  // return final image
  return bmOut;
 }
}

3. note that:

• Color boost technique is basically based on color filtering, which is to increase the intensity of a single color channel.
• With the help of this,boostColor() method you can Color Boost the image on click,on action_down,on the fly etc.

  4. conclusion:

• Some deep information about Color Boost.
• Know how to Color Boost an image bitmap from drawables.

  5. About the post:

•  The code seems to explain itself due to comments, and is very easy to understand.
•  Don’t mind to write a comment whatever you like to ask, to know,to suggest or recommend.
•  Hope you enjoy it!

6. Source Code:

        you can download the source code here

Cheers,

Hamad Ali Shaikh