目前有好多扫描证件的sdk，但是都需要联网或者收费。根据AndroidTessTwoOCR，图片文字识别功能，做了一个这样的demo，当然在识别过程中存在误差，目前了解到的是将图片进行处理，提高文字识别的能力
1、引入AndroidTessTwoOCR
2、自定义相机拍照
3、对拍摄的身份证照片进行裁剪，得到相应区域的信息
4、通过AndroidTessTwoOCR的api进行图片识别
大概的过程就是这样，在这个过程中遇到几个问题
1、需要去下载相应的chi_sim的中文语言包-------——附件已上传
2、在自定义相机中，一直在报一个setParam()错误
int PreviewWidth = 0; int PreviewHeight = 0; WindowManager wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);// // 获取窗口的管理器 Display display = wm.getDefaultDisplay();// 获得窗口里面的屏幕 Camera.Parameters parameters = camera.getParameters(); // 某些机型（红米note2）不支持 parameters.setPictureFormat(PixelFormat.JPEG);// 设置照片输出的格式 parameters.set("jpeg-quality", 100);// 设置照片质量 // 选择合适的预览尺寸 List<Camera.Size> sizeList = parameters.getSupportedPreviewSizes(); // 如果sizeList只有一个我们也没有必要做什么了，因为就他一个别无选择 if (sizeList.size() > 1) { Iterator<Camera.Size> itor = sizeList.iterator(); while (itor.hasNext()) { Camera.Size cur = itor.next(); if (cur.width >= PreviewWidth && cur.height >= PreviewHeight) { PreviewWidth = cur.width; PreviewHeight = cur.height; break; } } } parameters.setPreviewSize(PreviewWidth, PreviewHeight); // 获得摄像区域的大小 parameters.setPictureSize(PreviewWidth, PreviewHeight); // 获得保存图片的大小 camera.setParameters(parameters);这个找了好多菜找到这个方式
3、按比例裁剪身份证照片
4、对照片进行灰度、二值化处理
一、这个是自定义相机
package com.example.orion.htmltext1; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.PixelFormat; import android.hardware.Camera; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import android.util.Log; import android.view.Display; import android.view.MotionEvent; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.view.Window; import android.view.WindowManager; import android.widget.ImageView; import android.widget.Toast; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.util.Iterator; import java.util.List; import static android.content.ContentValues.TAG; /** * Created by Orion on 2017/12/15. */ @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP) public class custemCamera extends Activity { private SurfaceView surfaceview; private Camera camera; private ImageView imageView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //设置无标题 requestWindowFeature(Window.FEATURE_NO_TITLE); //设置全屏 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.activity_camera); imageView = findViewById(R.id.image111); // 拍照 findViewById(R.id.cameraok).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { takePicture(); } }); findViewById(R.id.light).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { openLight(); } }); findViewById(R.id.btn_close).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { finish(); } }); surfaceview = findViewById(R.id.surfaceview); SurfaceHolder holder = surfaceview.getHolder(); holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); //设置一个缓冲区...就是一个缓冲的Surface...这个Surface的数据来源于Camera.. holder.setFixedSize(480, 800);//设置分辨率为480*800 // SurfaceView只有当activity显示到了前台，该控件才会被创建 因此需要监听surfaceview的创建 holder.addCallback(new MySurfaceCallback()); } /** * 监听surfaceview的创建 * * @author Administrator * Surfaceview只有当activity显示到前台，该空间才会被创建 */ private final class MySurfaceCallback implements SurfaceHolder.Callback { @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } @Override public void surfaceCreated(SurfaceHolder holder) { try { if (camera != null) { camera.stopPreview();// 停掉原来摄像头的预览 camera.release();// 释放资源 camera = null;// 取消原来摄像头 } if (Camera.getNumberOfCameras() == 2) {//获取相机... camera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK); } else { camera = Camera.open(0); } int PreviewWidth = 0; int PreviewHeight = 0; WindowManager wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);// // 获取窗口的管理器 Display display = wm.getDefaultDisplay();// 获得窗口里面的屏幕 Camera.Parameters parameters = camera.getParameters(); // 某些机型（红米note2）不支持 parameters.setPictureFormat(PixelFormat.JPEG);// 设置照片输出的格式 parameters.set("jpeg-quality", 100);// 设置照片质量 // 选择合适的预览尺寸 List<Camera.Size> sizeList = parameters.getSupportedPreviewSizes(); // 如果sizeList只有一个我们也没有必要做什么了，因为就他一个别无选择 if (sizeList.size() > 1) { Iterator<Camera.Size> itor = sizeList.iterator(); while (itor.hasNext()) { Camera.Size cur = itor.next(); if (cur.width >= PreviewWidth && cur.height >= PreviewHeight) { PreviewWidth = cur.width; PreviewHeight = cur.height; break; } } } parameters.setPreviewSize(PreviewWidth, PreviewHeight); // 获得摄像区域的大小 parameters.setPictureSize(PreviewWidth, PreviewHeight); // 获得保存图片的大小 camera.setParameters(parameters); // 设置预览显示 camera.setPreviewDisplay(holder); // 开启预览 camera.startPreview(); } catch (IOException e) { e.printStackTrace(); } } @Override public void surfaceDestroyed(SurfaceHolder holder) { // TODO Auto-generated method stub if (camera != null) { camera.stopPreview(); camera.release(); camera = null; } } } /** * 打开闪光灯 */ public synchronized void openLight() { Log.e(TAG, "openLight"); if (camera != null) { Camera.Parameters parameters = camera.getParameters(); parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH); camera.setParameters(parameters); } } /** * 关闭闪光灯 */ public synchronized void offLight() { Log.e(TAG, "offLight"); if (camera != null) { Camera.Parameters parameters = camera.getParameters(); parameters.setFlashMode(Camera.Parameters.FLASH_MODE_OFF); camera.setParameters(parameters); } } //拍照的函数 public void takePicture() { /* * shutter:快门被按下 * raw:相机所捕获的原始数据 * jpeg:相机处理的数据 */ camera.takePicture(null, null, new MyPictureCallback()); } //byte转Bitmap public Bitmap Bytes2Bimap(byte[] b) { if (b.length != 0) { return BitmapFactory.decodeByteArray(b, 0, b.length); } else { return null; } } //bitmap转byte public byte[] Bitmap2Bytes(Bitmap bm) { ByteArrayOutputStream baos = new ByteArrayOutputStream(); bm.compress(Bitmap.CompressFormat.PNG, 100, baos); return baos.toByteArray(); } public void toast(String content) { Toast.makeText(this, content, Toast.LENGTH_SHORT).show(); } //照片回调函数，其实是处理照片的 private final class MyPictureCallback implements Camera.PictureCallback { @Override public void onPictureTaken(byte[] data, Camera camera) { try { goNext(data); } catch (Exception e) { e.printStackTrace(); } } } private void goNext(byte[] data) { ContentUtil.bitmaData = data; // Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length); // imageView.setImageBitmap(bitmap); Intent intent = new Intent(this, ResultActivity.class); startActivity(intent); } @Override public boolean onTouchEvent(MotionEvent event) { //对焦 camera.autoFocus(new Camera.AutoFocusCallback() { @Override public void onAutoFocus(boolean b, Camera camera) { camera.cancelAutoFocus(); } }); return super.onTouchEvent(event); } }
二、自定义相机
package com.example.orion.htmltext1; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.PixelFormat; import android.graphics.PorterDuff; import android.graphics.PorterDuffXfermode; import android.graphics.RectF; import android.util.AttributeSet; import android.util.Log; import android.util.TypedValue; import android.view.SurfaceHolder; import android.view.SurfaceView; public class PreviewBorderView extends SurfaceView implements SurfaceHolder.Callback, Runnable { private static final String DEFAULT_TIPS_TEXT = "请将身份证照片面置于框内扫描，并尽量对齐边框"; private static final int DEFAULT_TIPS_TEXT_SIZE = 18; private static final int DEFAULT_TIPS_TEXT_COLOR = Color.GREEN; private int mScreenH; private int mScreenW; private Canvas mCanvas; private Paint mPaint; private Paint mPaintLine; private SurfaceHolder mHolder; private Thread mThread; /** * 自定义属性 */ private float tipTextSize; private int tipTextColor; private String tipText; public PreviewBorderView(Context context) { this(context, null); } public PreviewBorderView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public PreviewBorderView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); initAttrs(context, attrs); init(); } /** * 初始化自定义属性 * * @param context Context * @param attrs AttributeSet */ private void initAttrs(Context context, AttributeSet attrs) { TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.PreviewBorderView); try { tipTextSize = a.getDimension(R.styleable.PreviewBorderView_tipTextSize, TypedValue .applyDimension(TypedValue.COMPLEX_UNIT_DIP, DEFAULT_TIPS_TEXT_SIZE, getResources().getDisplayMetrics())); tipTextColor = a.getColor(R.styleable.PreviewBorderView_tipTextColor, DEFAULT_TIPS_TEXT_COLOR); tipText = a.getString(R.styleable.PreviewBorderView_tipText); if (tipText == null) { tipText = DEFAULT_TIPS_TEXT; } } finally { a.recycle(); } } /** * 初始化绘图变量 */ private void init() { this.mHolder = getHolder(); this.mHolder.addCallback(this); this.mHolder.setFormat(PixelFormat.TRANSPARENT); setZOrderOnTop(true); setZOrderMediaOverlay(true); this.mPaint = new Paint(); this.mPaint.setAntiAlias(true); this.mPaint.setColor(Color.WHITE); this.mPaint.setStyle(Paint.Style.FILL_AND_STROKE); this.mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR)); this.mPaintLine = new Paint(); this.mPaintLine.setColor(Color.WHITE); this.mPaintLine.setStrokeWidth(3.0F); setKeepScreenOn(true); } /** * 绘制取景框 */ private void draw() { try { this.mCanvas = this.mHolder.lockCanvas(); this.mCanvas.drawARGB(100, 0, 0, 0); // this.mScreenW = (this.mScreenH * 4 / 3); Log.e("TAG", "mScreenW:" + mScreenW + " mScreenH:" + mScreenH); int left = this.mScreenW / 2 - this.mScreenH * 2 / 3 + this.mScreenH / 6; int top = this.mScreenH / 6; int right = this.mScreenW / 2 + this.mScreenH * 2 / 3 - this.mScreenH / 6; int bottom = (right - left) * 11 / 18 + top; this.mCanvas.drawRect(new RectF(left, top, right, bottom), this .mPaint); // this.mCanvas.drawLine( left, top, right, bottom + 150, this.mPaintLine); // this.mCanvas.drawLine(this.mScreenW / 2 - this.mScreenH * 2 / 3 + this.mScreenH * 1 / // 6, bottom, this.mScreenW / 2 - this.mScreenH * 2 / 3 + this // .mScreenH * 1 / 6 + 150, bottom, this.mPaintLine); // this.mCanvas.drawLine(this.mScreenW / 2 + this.mScreenH * 2 / 3 - this.mScreenH * 1 / // 6, bottom, this.mScreenW / 2 + this.mScreenH * 2 / 3 - this // .mScreenH * 1 / 6, bottom + 150, this.mPaintLine); // this.mCanvas.drawLine(this.mScreenW / 2 + this.mScreenH * 2 / 3 - this.mScreenH * 1 / // 6, bottom, this.mScreenW / 2 + this.mScreenH * 2 / 3 - this // .mScreenH * 1 / 6 - 150, bottom, this.mPaintLine); // this.mCanvas.drawLine(this.mScreenW / 2 - this.mScreenH * 2 / 3 + this.mScreenH * 1 / // 6, this.mScreenH - bottom, this.mScreenW / 2 - this.mScreenH * // 2 / 3 + bottom, this.mScreenH - bottom - 150, // this.mPaintLine); // this.mCanvas.drawLine(this.mScreenW / 2 - this.mScreenH * 2 / 3 + this.mScreenH * 1 / // 6, this.mScreenH - bottom, this.mScreenW / 2 - this.mScreenH * // 2 / 3 + bottom + 150, this.mScreenH - bottom, // this.mPaintLine); // this.mCanvas.drawLine(this.mScreenW / 2 + this.mScreenH * 2 / 3 - this.mScreenH * 1 / // 6, this.mScreenH - bottom, this.mScreenW / 2 + this.mScreenH * // 2 / 3 - bottom, this.mScreenH - bottom - 150, // this.mPaintLine); // this.mCanvas.drawLine(this.mScreenW / 2 + this.mScreenH * 2 / 3 - this.mScreenH * 1 / // 6, this.mScreenH - bottom, this.mScreenW / 2 + this.mScreenH * // 2 / 3 - bottom - 150, this.mScreenH - bottom, // this.mPaintLine); mPaintLine.setTextSize(tipTextSize); mPaintLine.setAntiAlias(true); mPaintLine.setDither(true); float length = mPaintLine.measureText(tipText); this.mCanvas.drawText(tipText, this.mScreenW / 2 - this.mScreenH * 2 / 3 + this .mScreenH * 1 / 6 + this.mScreenH / 2 - length / 2, this.mScreenH * 1 / 2 - tipTextSize, mPaintLine); Log.e("TAG", "left:" + (this.mScreenW / 2 - this.mScreenH * 2 / 3 + this.mScreenH * 1 / 6)); Log.e("TAG", "top:" + (bottom)); Log.e("TAG", "right:" + (this.mScreenW / 2 + this.mScreenH * 2 / 3 - this.mScreenH * 1 / 6)); Log.e("TAG", "bottom:" + (this.mScreenH - bottom)); } catch (Exception e) { e.printStackTrace(); } finally { if (this.mCanvas != null) { this.mHolder.unlockCanvasAndPost(this.mCanvas); } } } @Override public void surfaceCreated(SurfaceHolder holder) { //获得宽高，开启子线程绘图 this.mScreenW = getWidth(); this.mScreenH = getHeight(); this.mThread = new Thread(this); this.mThread.start(); } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } @Override public void surfaceDestroyed(SurfaceHolder holder) { //停止线程 try { mThread.interrupt(); mThread = null; } catch (Exception e) { e.printStackTrace(); } } @Override public void run() { //子线程绘图 draw(); } }
这个里面有处理照片的一些功能
package com.example.orion.htmltext1; import android.annotation.SuppressLint; import android.app.Activity; import android.app.ProgressDialog; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.ColorMatrix; import android.graphics.ColorMatrixColorFilter; import android.graphics.Matrix; import android.graphics.Paint; import android.media.ThumbnailUtils; import android.os.Bundle; import android.os.Environment; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.View; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; import com.googlecode.tesseract.android.TessBaseAPI; import static android.content.ContentValues.TAG; /** * Created by Orion on 2017/12/15. */ public class ResultActivity extends Activity { private TessBaseAPI tessBaseAPI; private Bitmap namebitmap; private Bitmap sexbitmap; private Bitmap minzubitmap; private Bitmap birthbitmap; private Bitmap addressBitmap; private Bitmap numbitmap; private Handler handler; private ProgressDialog dialog; private TextView textView2; private TextView textView3; private TextView textView4; private TextView textView5; private TextView textView6; private TextView textView7; private String text2; private String text3; private String text4; private String text5; private String text6; private String text7; private static final String DATA_PATH = Environment.getExternalStorageDirectory().toString() + "/Tess"; @SuppressLint("HandlerLeak") @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_result); handler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); dialog.cancel(); textView2.setText(text2); textView3.setText(text3); textView4.setText(text4); textView5.setText(text5); textView6.setText(text6); textView7.setText(text7); } }; ImageView imageView1 = findViewById(R.id.image1); ImageView imageView2 = findViewById(R.id.image2); ImageView imageView3 = findViewById(R.id.image3); ImageView imageView4 = findViewById(R.id.image4); ImageView imageView5 = findViewById(R.id.image5); ImageView imageView6 = findViewById(R.id.image6); ImageView imageView7 = findViewById(R.id.image7); textView2 = findViewById(R.id.text2); textView3 = findViewById(R.id.text3); textView4 = findViewById(R.id.text4); textView5 = findViewById(R.id.text5); textView6 = findViewById(R.id.text6); textView7 = findViewById(R.id.text7); findViewById(R.id.button).setOnClickListener(new View.OnClickListener() { @Override public void onClick(final View v) { dialog = new ProgressDialog(v.getContext()); dialog.setMessage("识别中......"); dialog.setCancelable(false); dialog.show(); new Thread(new Runnable() { @Override public void run() { text2 = getText(namebitmap); text3 = getText(sexbitmap); text4 = getText(minzubitmap); text5 = getText(birthbitmap); text6 = getText(addressBitmap); text7 = getText(numbitmap); if (text7 != null && text2 != null && text3 != null && text4 != null && text5 != null && text6 != null) { Message message = new Message(); handler.sendMessage(message); } else { Toast.makeText(v.getContext(), "识别失败", Toast.LENGTH_SHORT).show(); } } }).start(); } }); // 拍摄的照片 Bitmap bitmap1 = Bytes2Bimap(ContentUtil.bitmaData); int width1 = bitmap1.getWidth(); int height1 = bitmap1.getHeight(); int left = width1 / 2 - height1 * 2 / 3 + height1 / 6; int top = height1 / 6; int right = width1 / 2 + height1 * 2 / 3 - height1 / 6; int bottom = (right - left) * 11 / 18 + top; // 得到身份证 Bitmap bitmap2 = Bitmap.createBitmap(bitmap1, left, top, right - left, bottom - top); int width2 = bitmap2.getWidth(); int height2 = bitmap2.getHeight(); bitmap2 = changeLight(bitmap2, 50); imageView1.setImageBitmap(bitmap2); // 得到姓名 namebitmap = Bitmap.createBitmap(bitmap2, width2 * 15 / 85, height2 * 2 / 55, width2 / 4, height2 * 11 / 55); namebitmap = big(namebitmap, 1.5f); namebitmap = toGrayscale(namebitmap); namebitmap = convertToBMW(namebitmap, namebitmap.getWidth(), namebitmap.getHeight(), 200); imageView2.setImageBitmap(namebitmap); // 得到性别 sexbitmap = Bitmap.createBitmap(bitmap2, width2 * 15 / 85, height2 * 12 / 55, width2 / 9, height2 * 8 / 55); sexbitmap = big(sexbitmap, 1.5f); sexbitmap = toGrayscale(sexbitmap); sexbitmap = convertToBMW(sexbitmap, sexbitmap.getWidth(), sexbitmap.getHeight(), 180); imageView3.setImageBitmap(sexbitmap); // 得到民族 minzubitmap = Bitmap.createBitmap(bitmap2, width2 * 22 / 85, height2 * 12 / 55, width2 / 4, height2 * 8 / 55); minzubitmap = toGrayscale(minzubitmap); minzubitmap = convertToBMW(minzubitmap, minzubitmap.getWidth(), minzubitmap.getHeight(), 180); minzubitmap = big(minzubitmap, 3.0f); minzubitmap = Bitmap.createBitmap(minzubitmap, minzubitmap.getWidth() *7/ 15, 0, minzubitmap .getWidth()/2, minzubitmap.getHeight()); imageView4.setImageBitmap(minzubitmap); // 得到出生年月 birthbitmap = Bitmap.createBitmap(bitmap2, width2 * 15 / 85, height2 * 19 / 55, width2 / 3, height2 * 8 / 55); birthbitmap = big(birthbitmap, 2.0f); birthbitmap = toGrayscale(birthbitmap); birthbitmap = convertToBMW(birthbitmap, birthbitmap.getWidth(), birthbitmap.getHeight(), 210); imageView5.setImageBitmap(birthbitmap); // 得到住址 addressBitmap = Bitmap.createBitmap(bitmap2, width2 * 15 / 85, height2 * 27 / 55, width2 * 35 / 85, height2 * 15 / 55); addressBitmap = big(addressBitmap, 3.0f); addressBitmap = toGrayscale(addressBitmap); addressBitmap = convertToBMW(addressBitmap, addressBitmap.getWidth(), addressBitmap .getHeight(), 170); imageView6.setImageBitmap(addressBitmap); // 得到身份证号码 numbitmap = Bitmap.createBitmap(bitmap2, width2 * 27 / 85, height2 * 44 / 55, width2 * 50 / 85, height2 * 7 / 55); numbitmap = big(numbitmap, 1.5f); numbitmap = toGrayscale(numbitmap); numbitmap = convertToBMW(numbitmap, numbitmap.getWidth(), numbitmap.getHeight(), 180); imageView7.setImageBitmap(numbitmap); } /** 改变亮度 */ public Bitmap changeLight(Bitmap bitmap,int brightness){ ColorMatrix cMatrix = new ColorMatrix(); cMatrix.set(new float[] { 1, 0, 0, 0, brightness, 0, 1, 0, 0, brightness,// 改变亮度 0, 0, 1, 0, brightness, 0, 0, 0, 1, 0 }); Paint paint = new Paint(); paint.setColorFilter(new ColorMatrixColorFilter(cMatrix)); Canvas canvas = new Canvas(bitmap); // 在Canvas上绘制一个已经存在的Bitmap。这样，dstBitmap就和srcBitmap一摸一样了 canvas.drawBitmap(bitmap, 0, 0, paint); return bitmap; } /*** * 图片去色,返回灰度图片 * @param bmpOriginal 传入的图片 * @return 去色后的图片 */ public Bitmap toGrayscale(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; } /** * 锐化图片，二值化 * * @param bmp * @param w * @param h * @param tmp * @return */ public static Bitmap convertToBMW(Bitmap bmp, int w, int h, int tmp) { int width = bmp.getWidth(); // 获取位图的宽 int height = bmp.getHeight(); // 获取位图的高 int[] pixels = new int[width * height]; // 通过位图的大小创建像素点数组 // 设定二值化的域值，默认值为100 //tmp = 180; bmp.getPixels(pixels, 0, width, 0, 0, width, height); int alpha = 0xFF << 24; for (int i = 0; i < height; i++) { for (int j = 0; j < width; j++) { int grey = pixels[width * i + j]; // 分离三原色 alpha = ((grey & 0xFF000000) >> 24); int red = ((grey & 0x00FF0000) >> 16); int green = ((grey & 0x0000FF00) >> 8); int blue = (grey & 0x000000FF); if (red > tmp) { red = 255; } else { red = 0; } if (blue > tmp) { blue = 255; } else { blue = 0; } if (green > tmp) { green = 255; } else { green = 0; } pixels[width * i + j] = alpha << 24 | red << 16 | green << 8 | blue; if (pixels[width * i + j] == -1) { pixels[width * i + j] = -1; } else { pixels[width * i + j] = -16777216; } } } // 新建图片 Bitmap newBmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); // 设置图片数据 newBmp.setPixels(pixels, 0, width, 0, 0, width, height); Bitmap resizeBmp = ThumbnailUtils.extractThumbnail(newBmp, w, h); return resizeBmp; } /** * 放大图片 * * @param bitmap * @return */ private static Bitmap big(Bitmap bitmap, float num) { Matrix matrix = new Matrix(); matrix.postScale(num, num); //长和宽放大缩小的比例 Bitmap resizeBmp = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight (), matrix, true); return resizeBmp; } /** * 获取图片上的文字 * * @param bitmap * @return */ private String getText(Bitmap bitmap) { try { tessBaseAPI = new TessBaseAPI(); } catch (Exception e) { Log.e(TAG, e.getMessage()); } tessBaseAPI.init(DATA_PATH, "chi_sim"); // 识别黑名单 tessBaseAPI.setVariable(TessBaseAPI.VAR_CHAR_BLACKLIST, "!@#$%^&*()_+=÷-[]}{;:'\"\\|~`," + "./<>?" +"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"); bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true); tessBaseAPI.setImage(bitmap); String retStr = "No result"; try { retStr = tessBaseAPI.getUTF8Text(); } catch (Exception e) { Log.e(TAG, e.getMessage()); } tessBaseAPI.clear(); tessBaseAPI.end(); return retStr; } /** * byte转Bitmap * * @param b * @return */ public Bitmap Bytes2Bimap(byte[] b) { if (b.length != 0) { BitmapFactory.Options options = new BitmapFactory.Options(); options.inPreferredConfig = Bitmap.Config.ARGB_8888; Bitmap bitmap = BitmapFactory.decodeByteArray(b, 0, b.length, options); return bitmap; } else { return null; } } }