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// CharacterExtractor.java
// Copyright (c) 2010 William Whitney
// All rights reserved.
// This software is released under the BSD license.
// Please see the accompanying LICENSE.txt for details.
package srtp.ys.ocrtest;
import java.util.logging.Level;
import java.util.logging.Logger;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.Paint;
import android.graphics.Matrix;
import android.graphics.Bitmap.Config;
import android.graphics.drawable.BitmapDrawable;
import android.util.Log;
import android.widget.ImageView;
import android.app.*;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
/**
* Saves all the characters in an image to an output directory individually.
* @author William Whitney
*/
public class CharacterExtractor extends DocumentScannerListenerAdaptor
{
private DocumentScanner documentScanner = new DocumentScanner();
private int std_width;
private int std_height;
////////////////////////////////////////////////////////////////////
public void slice( int std_width, int std_height)
{
try
{
this.std_width = std_width;
this.std_height = std_height;
Bitmap img = BitmapFactory.decodeFile("/sdcard/test.bmp");
PixelImage pixelImage = new PixelImage(img);
pixelImage.toGrayScale(true); //OK
pixelImage.filter(); // OK
documentScanner.scan(pixelImage, this, 0, 0, pixelImage.width, pixelImage.height);
}
catch (Exception ex)
{
Logger.getLogger(CharacterExtractor.class.getName()).log(Level.SEVERE, null, ex);
}
}
////////////////////////////////////////////////////////////////////
public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Matrix matrix = new Matrix();
float scaleWidth ;
float scaleHeight;
//float scaleWidth = ((float) w / width);
if(height>width) {
scaleWidth = ((float) h / height);
scaleHeight = ((float) h / height);
}
else
{
scaleWidth = ((float) w / width);
scaleHeight = ((float) w / width);
}
matrix.postScale(scaleWidth, scaleHeight);
Bitmap newBmp = Bitmap.createBitmap(bitmap, 0, 0, width, height,
matrix, true);
//加上30*30白色背景
Bitmap mbmpTest = Bitmap.createBitmap(30,30, Config.RGB_565);
Canvas canvasTemp = new Canvas(mbmpTest);//给Canvas指定一个bitmap，之后就不是画到屏幕而是画到这个bitmap上
canvasTemp.drawColor(Color.WHITE);
Paint mPaint = new Paint();
mPaint.setColor(Color.WHITE);
canvasTemp.drawBitmap(newBmp,(((float)(30-newBmp.getWidth()))/2),(((float)(30-newBmp.getHeight()))/2),mPaint);//画到正中间
return mbmpTest;
}
public static Bitmap rgbtoGrayscale(Bitmap bmpOriginal) {
int width, height;
height = bmpOriginal.getHeight();
width = bmpOriginal.getWidth();
Bitmap bmpGrayscale = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
Canvas c = new Canvas(bmpGrayscale);
Paint paint = new Paint();
ColorMatrix cm = new ColorMatrix();
cm.setSaturation(0);
ColorMatrixColorFilter f = new ColorMatrixColorFilter(cm);
paint.setColorFilter(f);
c.drawBitmap(bmpOriginal, 0, 0, paint);
return bmpGrayscale;
}
public void processChar(int x1, int y1, int x2, int y2, int rowY1, int rowY2)
{
try
{
int areaW = x2 - x1;
int areaH = y2 - y1;
//Extract the character
Bitmap fatherimage = BitmapFactory.decodeFile("/sdcard/test.bmp");
// Drawable characterImage=new BitmapDrawable(BitmapFactory.decodeFile("/sdcard/test.jpg"));
Bitmap bitmapcharacterImage = Bitmap.createBitmap(fatherimage,x1, y1, areaW, areaH);
Log.v("w","w:"+bitmapcharacterImage.getWidth()+"H:"+bitmapcharacterImage.getHeight());
Bitmap characterImage=zoomBitmap(bitmapcharacterImage,std_width,std_height);//缩放并添上背景
// 显示位图
BitmapDrawable bmpDraw=new BitmapDrawable(rgbtoGrayscale(characterImage));
mainactivity.iv2.setImageDrawable(bmpDraw);
// int[] testImgPixels = ImageUtils.getPixels(rgbtoGrayscale(characterImage), characterImage.getWidth( ), characterImage.getHeight( ));
// int[][] binerymerticx=ImageUtils.getSymbolMatrix(testImgPixels, 2);
int[] binerymerticxforcompare = ImageUtils.getbinarymatrix(rgbtoGrayscale(characterImage));
int countblackpoint=0;
for(int ii=0;ii<30;ii++)
for(int jj=0;jj<30;jj++)
if(binerymerticxforcompare[ii*30+jj]==1)
countblackpoint++;
if(countblackpoint<10)
{
System.out.println();
}
else
{
//此处进行比较并输出结果：
int i;
int j;
int maxequal=0;
int maxindex=0;
int count=0;
for(i=0;i<26;i++)
{
count=0;
for(j=0;j<900;j++)
{
if(model.CharacterModel1[j]==binerymerticxforcompare[j])
count++;
}
// System.out.print(count);
// System.out.print(" ");
if(count>maxequal)
{
maxequal=count;
maxindex=i;
}
}
int i2;
int j2;
int maxequal2=0;
int maxindex2=0;
int count2=0;
for(i2=0;i2<26;i2++)
{
count2=0;
for(j2=0;j2<900;j2++)
{
if(model2.CharacterModel2[i2][j2]==binerymerticxforcompare[j2])
count2++;
}
// System.out.print(count);
// System.out.print(" ");
if(count2>maxequal2)
{
maxequal2=count2;
maxindex2=i2;
}
}
char result;
if(maxequal>maxequal2)
result=(char)('A'+maxindex);
else
result=(char)('a'+maxindex2);
mainactivity.res+=result;
// System.out.print(result);
// System.out.println();
}
}
catch (Exception ex)
{
Logger.getLogger(CharacterExtractor.class.getName()).log(Level.SEVERE, null, ex);
}
}
private static final Logger LOG = Logger.getLogger(CharacterExtractor.class.getName());
}