调用OCR识别图像中的文字

CharacterExtractor.java

002

006	package srtp.ys.ocrtest;

007	import java.util.logging.Level;

008	import java.util.logging.Logger;

009	import android.graphics.Bitmap;

010	import android.graphics.BitmapFactory;

011	import android.graphics.Canvas;

012	import android.graphics.Color;

013	import android.graphics.ColorMatrix;

014	import android.graphics.ColorMatrixColorFilter;

015	import android.graphics.Paint;

016	import android.graphics.Matrix;

017	import android.graphics.Bitmap.Config;

018	import android.graphics.drawable.BitmapDrawable;

019	import android.util.Log;

020	import android.widget.ImageView;

021	import android.app.*;

022	import android.app.Activity;

023	import android.os.Bundle;

024	import android.view.View;

025

/**

026	* Saves all the characters in an image to an output directory individually.

027	* @author William Whitney

028

*/

029	public class CharacterExtractor extends DocumentScannerListenerAdaptor

030

{

031	private DocumentScanner documentScanner = new DocumentScanner();

032	private int std_width;

033	private int std_height;

034	////////////////////////////////////////////////////////////////////

035	public void slice(  int std_width, int std_height)

036

{

037

try

038

{

039	this.std_width = std_width;

040	this.std_height = std_height;

041	Bitmap img = BitmapFactory.decodeFile("/sdcard/test.bmp");

042	PixelImage pixelImage = new PixelImage(img);

043	pixelImage.toGrayScale(true); //OK

044	pixelImage.filter(); // OK

045	documentScanner.scan(pixelImage, this, 0, 0, pixelImage.width, pixelImage.height);

046

}

047	catch (Exception ex)

048

{

049	Logger.getLogger(CharacterExtractor.class.getName()).log(Level.SEVERE,null, ex);

050

}

051

}

052	////////////////////////////////////////////////////////////////////

053	public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h) {

054	int width = bitmap.getWidth();

055	int height = bitmap.getHeight();

056	Matrix matrix = new Matrix();

057	float scaleWidth ;

058	float scaleHeight;

059	//float scaleWidth = ((float) w / width);

060	if(height>width)  {

061	scaleWidth = ((float) h / height);

062	scaleHeight = ((float) h / height);

063

}

064

else

065

{

066	scaleWidth = ((float) w / width);

067	scaleHeight = ((float) w / width);

068

}

069	matrix.postScale(scaleWidth, scaleHeight);

070	Bitmap newBmp = Bitmap.createBitmap(bitmap, 0, 0, width, height,

071	matrix, true);

072	//加上30*30白色背景

073	Bitmap mbmpTest = Bitmap.createBitmap(30,30, Config.RGB_565);

074	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

075	canvasTemp.drawColor(Color.WHITE);

076	Paint mPaint = new Paint();

077	mPaint.setColor(Color.WHITE);

078	canvasTemp.drawBitmap(newBmp,(((float)(30-newBmp.getWidth()))/2),(((float)(30-newBmp.getHeight()))/2),mPaint);//画到正中间

079	return mbmpTest;

080

}

081	public static Bitmap rgbtoGrayscale(Bitmap bmpOriginal) {

082	int width, height;

083	height = bmpOriginal.getHeight();

084	width = bmpOriginal.getWidth();

085	Bitmap bmpGrayscale = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);

086	Canvas c = new Canvas(bmpGrayscale);

087	Paint paint = new Paint();

088	ColorMatrix cm = new ColorMatrix();

089	cm.setSaturation(0);

090	ColorMatrixColorFilter f = new ColorMatrixColorFilter(cm);

091	paint.setColorFilter(f);

092	c.drawBitmap(bmpOriginal, 0, 0, paint);

093	return bmpGrayscale;

094

}

095	public void processChar(int x1, int y1, int x2, int y2, int rowY1, introwY2)

096

{

097

try

098

{

099	int areaW = x2 - x1;

100	int areaH = y2 - y1;

101	//Extract the character

102	Bitmap fatherimage =  BitmapFactory.decodeFile("/sdcard/test.bmp");

103	// Drawable characterImage=new BitmapDrawable(BitmapFactory.decodeFile("/sdcard/test.jpg"));

104	Bitmap bitmapcharacterImage = Bitmap.createBitmap(fatherimage,x1, y1, areaW, areaH);

105	Log.v("w","w:"+bitmapcharacterImage.getWidth()+"H:"+bitmapcharacterImage.getHeight());

106	Bitmap characterImage=zoomBitmap(bitmapcharacterImage,std_width,std_height);//缩放并添上背景

107

// 显示位图

108	BitmapDrawable bmpDraw=newBitmapDrawable(rgbtoGrayscale(characterImage));

109	mainactivity.iv2.setImageDrawable(bmpDraw);

110	// int[] testImgPixels = ImageUtils.getPixels(rgbtoGrayscale(characterImage), characterImage.getWidth( ),        characterImage.getHeight( ));

111	// int[][] binerymerticx=ImageUtils.getSymbolMatrix(testImgPixels, 2);

112	int[] binerymerticxforcompare = ImageUtils.getbinarymatrix(rgbtoGrayscale(characterImage));

113	int countblackpoint=0;

114	for(int ii=0;ii<30;ii++)

115	for(int jj=0;jj<30;jj++)

116	if(binerymerticxforcompare[ii*30+jj]==1)

117	countblackpoint++;

118	if(countblackpoint<10)

119

{

120	System.out.println();

121

}

122

else

123

{

124	//此处进行比较并输出结果：

125

int i;

126

int j;

127	int maxequal=0;

128	int maxindex=0;

129	int count=0;

130	for(i=0;i<26;i++)

131

{

132

count=0;

133	for(j=0;j<900;j++)

134

{

135	if(model.CharacterModel1[j]==binerymerticxforcompare[j])

136

count++;

137

}

138	//          System.out.print(count);

139	//          System.out.print(" ");

140	if(count>maxequal)

141

{

142	maxequal=count;

143	maxindex=i;

144

}

145

}

146

int i2;

147

int j2;

148	int maxequal2=0;

149	int maxindex2=0;

150	int count2=0;

151	for(i2=0;i2<26;i2++)

152

{

153

count2=0;

154	for(j2=0;j2<900;j2++)

155

{

156	if(model2.CharacterModel2[i2][j2]==binerymerticxforcompare[j2])

157

count2++;

158

}

159	//          System.out.print(count);

160	//          System.out.print(" ");

161	if(count2>maxequal2)

162

{

163	maxequal2=count2;

164	maxindex2=i2;

165

}

166

}

167	char result;

168	if(maxequal>maxequal2)

169	result=(char)('A'+maxindex);

170

else

171	result=(char)('a'+maxindex2);

172	mainactivity.res+=result;

173	//  System.out.print(result);

174	//   System.out.println();

175

}

176

}

177	catch (Exception ex)

178

{

179	Logger.getLogger(CharacterExtractor.class.getName()).log(Level.SEVERE,null, ex);

180

}

181

}

182	private static final Logger LOG = Logger.getLogger(CharacterExtractor.class.getName());

183

}