自定義照相機通過裝置攝像頭實時獲取身份證圖片資訊，然後識別圖片中身份證號碼，採用ocr識別數字
宣告

import

import

import

import “MBProgressHUD.h”

//#import “Tesseract.h”
@protocol PassImage
-(void)PassImagedata:(id)_data;
@end
@interface DZC_Carmer_photo : UIViewController

實現

import “DZC_Carmer_photo.h”

import “UIImage+DZC_UImageScral.h”

import “DzcDES.h”

import “DZC_CustomLine.h”

//#import “Tesseract.h”
@interface DZC_Carmer_photo ()
{
UIButton *btn;
UIImageView *imgView;
}
@end

@implementation DZC_Carmer_photo
-(instancetype)init
{
self=[super init];
if (self)
{
[self initialSession];
return self;
}
return self;
}
-(void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[self.operationQueue cancelAllOperations];
}
- (void)viewDidLoad {
[super viewDidLoad];

self.operationQueue = [[NSOperationQueue alloc] init];

// UIButton *carmerBtn=[[UIButton alloc]initWithFrame:CGRectMake(SCREENWIDTH/2-50, SCREENHEIGHT-100, 100, 50)];
// //[carmerBtn setTransform:CGAffineTransformMakeRotation(M_PI/2)];
// [carmerBtn setTitle:@”拍照” forState:UIControlStateNormal];
// carmerBtn.backgroundColor=[UIColor orangeColor];
// [carmerBtn addTarget:self action:@selector(shutterCamera) forControlEvents:UIControlEventTouchUpInside];
// self.shutterButton=carmerBtn;
// [self.view addSubview:carmerBtn];
// [self.view bringSubviewToFront:carmerBtn];
UIButton *returnBtn=[[UIButton alloc]initWithFrame:CGRectMake(10, SCREENHEIGHT-100, 100, 50)];
//[returnBtn setTransform:CGAffineTransformMakeRotation(M_PI/2)];
[returnBtn setTitle:@”撤銷” forState:UIControlStateNormal];
returnBtn.backgroundColor=[UIColor orangeColor];
[returnBtn addTarget:self action:@selector(CloseBtn) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:returnBtn];
[self.view bringSubviewToFront:returnBtn];
UILabel *titleLable=[[UILabel alloc]initWithFrame:CGRectMake(SCREENWIDTH-110, SCREENHEIGHT-120, 100, 140)];
//[titleLable setTransform:CGAffineTransformMakeRotation(M_PI/2)];
[titleLable setFont:[UIFont systemFontOfSize:10]];
[titleLable setText:@”友情提醒：掃描身份證時請將身份證號碼放置於矩形框內”];

titleLable.numberOfLines=0;
[titleLable setTextColor:[UIColor whiteColor]];
[self.view addSubview:titleLable];
MB_HUD=[[MBProgressHUD alloc]init];
[self.view addSubview:MB_HUD];

iamgeview=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 300, 60)];
iamgeview.center=CGPointMake(SCREENWIDTH/2, SCREENHEIGHT/2);
iamgeview.layer.borderWidth=2.0;
iamgeview.layer.borderColor=[UIColor orangeColor].CGColor;

[self.view addSubview:iamgeview];
[self.view bringSubviewToFront:iamgeview];


/*
imgView=[[UIImageView alloc]initWithFrame:CGRectMake(0, 20, SCREENWIDTH, 50)];
imgView.backgroundColor=[UIColor orangeColor];
[self.view addSubview:imgView];
[self.view bringSubviewToFront:imgView];
 */

// Do any additional setup after loading the view.

}
-(void)CloseBtn
{
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void) initialSession
{
//這個方法的執行我放在init方法裡了
self.session = [[AVCaptureSession alloc] init];
[self.session setSessionPreset:AVCaptureSessionPresetMedium];

self.videoInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self backCamera] error:nil];
//[self fronCamera]方法會返回一個AVCaptureDevice物件，因為我初始化時是採用前攝像頭，所以這麼寫，具體的實現方法後面會介紹
/*
self.stillImageOutput = [[AVCaptureStillImageOutput alloc] init];

NSDictionary * outputSettings = [[NSDictionary alloc] initWithObjectsAndKeys:AVVideoCodecJPEG,AVVideoCodecKey, nil];
//這是輸出流的設定引數AVVideoCodecJPEG引數表示以JPEG的圖片格式輸出圖片
[self.stillImageOutput setOutputSettings:outputSettings];
*/
self.VideoDataOutput=[[AVCaptureVideoDataOutput alloc]init];

if ([self.session canAddInput:self.videoInput]) {
    [self.session addInput:self.videoInput];
}
/*
if ([self.session canAddOutput:self.stillImageOutput]) {
    [self.session addOutput:self.stillImageOutput];
}
 */
if ([self.session canAddOutput:self.VideoDataOutput])
{
    [self.session addOutput:self.VideoDataOutput];
    dispatch_queue_t queue = dispatch_queue_create("myQueue", NULL);

    [self.VideoDataOutput setSampleBufferDelegate:self queue:queue];

    //dispatch_release(queue);



    // Specify the pixel format

    self.VideoDataOutput.videoSettings =

    [NSDictionary dictionaryWithObject:

     [NSNumber numberWithInt:kCVPixelFormatType_32BGRA]

                                forKey:(id)kCVPixelBufferPixelFormatTypeKey];

}

}
- (AVCaptureDevice *)cameraWithPosition:(AVCaptureDevicePosition) position {
NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
for (AVCaptureDevice *device in devices) {
if ([device position] == position) {
_cameraAvaible=YES;
return device;
}
}
_cameraAvaible=NO;
return nil;
}

• (AVCaptureDevice *)frontCamera {
  return [self cameraWithPosition:AVCaptureDevicePositionFront];
  }

• (AVCaptureDevice *)backCamera {
  return [self cameraWithPosition:AVCaptureDevicePositionBack];
  }
  //接下來在viewWillAppear方法裡執行載入預覽圖層的方法

• (void) setUpCameraLayer
  {
  if (_cameraAvaible == NO) return;

  if (self.previewLayer == nil) {

  self.previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.session];
  self.previewLayer.videoGravity=AVLayerVideoGravityResizeAspect;
  self.previewLayer.frame=CGRectMake(0,0, SCREENWIDTH, SCREENHEIGHT);
  self.previewLayer.position=CGPointMake(SCREENWIDTH/2, SCREENHEIGHT/2);
  [self.view.layer insertSublayer:self.previewLayer atIndex:0];
  
  /*
   self.previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.session];
  self.cameraShowView=[[UIView alloc]initWithFrame:CGRectMake(0, 20, SCREENWIDTH, 300)];
   UIView * view = self.cameraShowView;
   CALayer * viewLayer = [view layer];
   [viewLayer setMasksToBounds:YES];
  
   CGRect bounds = [view bounds];
   [self.previewLayer setFrame:bounds];
   [self.previewLayer setVideoGravity:AVLayerVideoGravityResizeAspect];
  
   [viewLayer insertSublayer:self.previewLayer below:[[viewLayer sublayers] objectAtIndex:0]];
   */
  

  }
  }
  -(void)viewWillAppear:(BOOL)animated
  {
  [super viewWillAppear:animated];
  [self setUpCameraLayer];
  // DZC_CustomLine *line=[[DZC_CustomLine alloc]init];
  // line.backgroundColor=[UIColor clearColor];
  // line.frame=self.previewLayer.frame;
  // [self.view addSubview:line];
  // [line setNeedsDisplay];
  //[self turnOnLed];//開啟閃光燈
  }
  //在viewDidAppear和viewDidDisappear方法中啟動和關閉session

• (void) viewDidAppear:(BOOL)animated
  {
  [super viewDidAppear:animated];
  if (self.session) {
  [self.session startRunning];
  }
  }

• (void) viewDidDisappear:(BOOL)animated
  {
  [super viewDidDisappear: animated];
  if (self.session) {
  [self.session stopRunning];
  }
  [self.previewLayer removeFromSuperlayer];
  self.previewLayer =nil;
  self.session=nil;
  //[self turnOffLed];//關閉閃光燈
  }
  //這是切換鏡頭的按鈕方法

• (void)toggleCamera {
  NSUInteger cameraCount = [[AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo] count];
  if (cameraCount > 1) {
  NSError *error;
  AVCaptureDeviceInput *newVideoInput;
  AVCaptureDevicePosition position = [[_videoInput device] position];

  if (position == AVCaptureDevicePositionBack)
      newVideoInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self frontCamera] error:&error];
  else if (position == AVCaptureDevicePositionFront)
      newVideoInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self backCamera] error:&error];
  else
      return;
  
  if (newVideoInput != nil) {
      [self.session beginConfiguration];
      [self.session removeInput:self.videoInput];
      if ([self.session canAddInput:newVideoInput]) {
          [self.session addInput:newVideoInput];
          [self setVideoInput:newVideoInput];
      } else {
          [self.session addInput:self.videoInput];
      }
      [self.session commitConfiguration];
  } else if (error) {
      NSLog(@"toggle carema failed, error = %@", error);
  }
  

  }
  DLog(@”切換攝像頭”);
  }
  // 這是拍照按鈕的方法

• (void) shutterCamera
  {
  [MB_HUD show:YES];

  self.shutterButton.userInteractionEnabled=NO;
  AVCaptureConnection * videoConnection = [self.stillImageOutput connectionWithMediaType:AVMediaTypeVideo];
  if (!videoConnection) {

  [MB_HUD setDetailsLabelText:@"take photo failed!"];
  [MB_HUD hide:YES afterDelay:1.0];
  return;
  

  }

  [self.stillImageOutput captureStillImageAsynchronouslyFromConnection:videoConnection completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) {
  if (imageDataSampleBuffer == NULL) {
  [MB_HUD setDetailsLabelText:@”take photo null!”];
  [MB_HUD hide:YES afterDelay:1.0];
  return;
  }

  NSData * imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];
  UIImage * image = [UIImage imageWithData:imageData];
  DLog(@"image size = %@",NSStringFromCGSize(image.size));
  

  UIImage * imageOne=[self fixOrientation:image];
  UIImage *imageTwo=[self image:imageOne rotation:UIImageOrientationLeft];
  UIImage *imageThree=[self scaleFromImage:imageTwo toSize:CGSizeMake(308, 400)];
  DLog(@”image size = %@”,NSStringFromCGSize(imageThree.size));
  [self.delegate PassImagedata:imageThree];
  imageThree=nil;
  [MB_HUD hide:YES];
  [self dismissViewControllerAnimated:YES completion:nil];
  //[self turnOffLed];
  }];
  }
  -(void)captureOutput:(AVCaptureOutput )captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection )connection
  {
  DLog(@”有圖片”);
  [NSThread sleepForTimeInterval:1.5];
  [self showImageView:sampleBuffer];

}
-(void)showImageView:(CMSampleBufferRef)_sampleBuffer
{
UIImage *image=[self imageFromSampleBuffer:_sampleBuffer];

if (image)
{
    UIImage *one=[self fixOrientation:image];
    NSData *data=UIImageJPEGRepresentation(one, 1.0);
    one=[UIImage imageWithData:data];
     UIImage * img=[one getSubImage:CGRectMake(SCREENWIDTH/2-150, iamgeview.frame.origin.y-60, iamgeview.frame.size.width, iamgeview.frame.size.height)];
    img=[self grayscale:img type:3];



    /*
    UIImage *imag=[UIImage imageNamed:@"image_sample.jpg"];
    imag=[self grayscale:imag type:3];
     */
    [self recognizeImageWithTesseract:img];
    /*
     Tesseract *tesseract= [[Tesseract alloc] initWithDataPath:@"tessdata" language:@"eng"];
        [tesseract setVariableValue:@"0123456789" forKey:@"tessedit_char_whitelist"];
        [tesseract setImage:img];
        [tesseract recognize];
        NSString *str=[tesseract recognizedText];
        [tesseract clear];

        tesseract=nil;
        str=[DzcDES trim:str];
        NSRange range=[str rangeOfString:@" "];
        if (range.location !=NSNotFound)
        {
            NSArray *array=[str componentsSeparatedByString:@" "];

            for(NSString *ss in array)
            {
                DLog(@"---%@",ss);
               NSString * s=[DzcDES trim:ss];
                if ([DzcDES validateIdentityCard:s])
                {
                    DLog(@"字串為身份證號碼");
                    dispatch_async(dispatch_get_main_queue(), ^{

                        [MB_HUD show:YES];
                        [MB_HUD setDetailsLabelText:s];

                        [self.delegate PassImagedata:s];
                        [self dismissViewControllerAnimated:YES completion:nil];

                    });
                }

            }
        }
        else
        {
            str=[DzcDES trim:str];
            if ([DzcDES validateIdentityCard:str])
            {
                dispatch_async(dispatch_get_main_queue(), ^{

                    [MB_HUD show:YES];
                    [MB_HUD setDetailsLabelText:str];

                    [self.delegate PassImagedata:str];
                    [self dismissViewControllerAnimated:YES completion:nil];
                });
            }




        }

        [[NSThread currentThread]cancel];

    */

}
return;

}
//修正圖片方向
- (UIImage )fixOrientation:(UIImage )aImage
{

// No-op if the orientation is already correct
if (aImage.imageOrientation == UIImageOrientationUp)
    return aImage;

// We need to calculate the proper transformation to make the image upright.
// We do it in 2 steps: Rotate if Left/Right/Down, and then flip if Mirrored.
CGAffineTransform transform = CGAffineTransformIdentity;

switch (aImage.imageOrientation) {
    case UIImageOrientationDown:
    case UIImageOrientationDownMirrored:
        transform = CGAffineTransformTranslate(transform, aImage.size.width, aImage.size.height);
        transform = CGAffineTransformRotate(transform, M_PI);
        break;

    case UIImageOrientationLeft:
    case UIImageOrientationLeftMirrored:
        transform = CGAffineTransformTranslate(transform, aImage.size.width, 0);
        transform = CGAffineTransformRotate(transform, M_PI_2);
        break;

    case UIImageOrientationRight:
    case UIImageOrientationRightMirrored:
        transform = CGAffineTransformTranslate(transform, 0, aImage.size.height);
        transform = CGAffineTransformRotate(transform, -M_PI_2);
        break;
    default:
        break;
}

switch (aImage.imageOrientation) {
    case UIImageOrientationUpMirrored:
    case UIImageOrientationDownMirrored:
        transform = CGAffineTransformTranslate(transform, aImage.size.width, 0);
        transform = CGAffineTransformScale(transform, -1, 1);
        break;

    case UIImageOrientationLeftMirrored:
    case UIImageOrientationRightMirrored:
        transform = CGAffineTransformTranslate(transform, aImage.size.height, 0);
        transform = CGAffineTransformScale(transform, -1, 1);
        break;
    default:
        break;
}

// Now we draw the underlying CGImage into a new context, applying the transform
// calculated above.
CGContextRef ctx = CGBitmapContextCreate(NULL, aImage.size.width, aImage.size.height,
                                         CGImageGetBitsPerComponent(aImage.CGImage), 0,
                                         CGImageGetColorSpace(aImage.CGImage),
                                         CGImageGetBitmapInfo(aImage.CGImage));
CGContextConcatCTM(ctx, transform);
switch (aImage.imageOrientation) {
    case UIImageOrientationLeft:
    case UIImageOrientationLeftMirrored:
    case UIImageOrientationRight:
    case UIImageOrientationRightMirrored:
        // Grr...
        CGContextDrawImage(ctx, CGRectMake(0,0,aImage.size.height,aImage.size.width), aImage.CGImage);
        break;

    default:
        CGContextDrawImage(ctx, CGRectMake(0,0,aImage.size.width,aImage.size.height), aImage.CGImage);
        break;
}

// And now we just create a new UIImage from the drawing context
CGImageRef cgimg = CGBitmapContextCreateImage(ctx);
UIImage *img = [UIImage imageWithCGImage:cgimg];
CGContextRelease(ctx);
CGImageRelease(cgimg);
return img;

}

pragma mark - Navigation

/*
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
- (UIImage )image:(UIImage )image rotation:(UIImageOrientation)orientation
{
long double rotate = 0.0;
CGRect rect;
float translateX = 0;
float translateY = 0;
float scaleX = 1.0;
float scaleY = 1.0;

switch (orientation) {
    case UIImageOrientationLeft:
        rotate = M_PI_2;
        rect = CGRectMake(0, 0, image.size.height, image.size.width);
        translateX = 0;
        translateY = -rect.size.width;
        scaleY = rect.size.width/rect.size.height;
        scaleX = rect.size.height/rect.size.width;
        break;
    case UIImageOrientationRight:
        rotate = 3 * M_PI_2;
        rect = CGRectMake(0, 0, image.size.height, image.size.width);
        translateX = -rect.size.height;
        translateY = 0;
        scaleY = rect.size.width/rect.size.height;
        scaleX = rect.size.height/rect.size.width;
        break;
    case UIImageOrientationDown:
        rotate = M_PI;
        rect = CGRectMake(0, 0, image.size.width, image.size.height);
        translateX = -rect.size.width;
        translateY = -rect.size.height;
        break;
    default:
        rotate = 0.0;
        rect = CGRectMake(0, 0, image.size.width, image.size.height);
        translateX = 0;
        translateY = 0;
        break;
}

UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
//做CTM變換
CGContextTranslateCTM(context, 0.0, rect.size.height);
CGContextScaleCTM(context, 1.0, -1.0);
CGContextRotateCTM(context, rotate);
CGContextTranslateCTM(context, translateX, translateY);

CGContextScaleCTM(context, scaleX, scaleY);
//繪製圖片
CGContextDrawImage(context, CGRectMake(0, 0, rect.size.width, rect.size.height), image.CGImage);

UIImage *newPic = UIGraphicsGetImageFromCurrentImageContext();

return newPic;

}
// 改變影象的尺寸，方便上傳伺服器
- (UIImage ) scaleFromImage: (UIImage ) image toSize: (CGSize) size
{
UIGraphicsBeginImageContext(size);
[image drawInRect:CGRectMake(0, 0, size.width, size.height)];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsPopContext();
UIGraphicsEndImageContext();
return newImage;
}
-(void)turnOffLed {
AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
if ([device hasTorch]) {
[device lockForConfiguration:nil];
[device setTorchMode: AVCaptureTorchModeOff];
[device unlockForConfiguration];
}
}

-(void)turnOnLed {
AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
if ([device hasTorch]) {
[device lockForConfiguration:nil];
[device setTorchMode: AVCaptureTorchModeOn];
[device unlockForConfiguration];
}
}
// 通過抽樣快取資料建立一個UIImage物件
- (UIImage *) imageFromSampleBuffer:(CMSampleBufferRef) sampleBuffer
{
// Get a CMSampleBuffer’s Core Video image buffer for the media data
CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
// Lock the base address of the pixel buffer
CVPixelBufferLockBaseAddress(imageBuffer, 0);

// Get the number of bytes per row for the pixel buffer
void *baseAddress = CVPixelBufferGetBaseAddress(imageBuffer);

// Get the number of bytes per row for the pixel buffer
size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer);
// Get the pixel buffer width and height
size_t width = CVPixelBufferGetWidth(imageBuffer);
size_t height = CVPixelBufferGetHeight(imageBuffer);

// Create a device-dependent RGB color space
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();

// Create a bitmap graphics context with the sample buffer data
CGContextRef context = CGBitmapContextCreate(baseAddress, width, height, 8,
                                             bytesPerRow, colorSpace, kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst);
// Create a Quartz image from the pixel data in the bitmap graphics context
CGImageRef quartzImage = CGBitmapContextCreateImage(context);
// Unlock the pixel buffer
CVPixelBufferUnlockBaseAddress(imageBuffer,0);

// Free up the context and color space
CGContextRelease(context);
CGColorSpaceRelease(colorSpace);

// Create an image object from the Quartz image
//UIImage *image = [UIImage imageWithCGImage:quartzImage];
UIImage *image = [UIImage imageWithCGImage:quartzImage scale:1.0f orientation:UIImageOrientationRight];

// Release the Quartz image
CGImageRelease(quartzImage);

return image;

}
//將圖片改成黑白圖片
- (UIImage*)grayscale:(UIImage*)anImage type:(int)type {

CGImageRef imageRef = anImage.CGImage;

size_t width  = CGImageGetWidth(imageRef);
size_t height = CGImageGetHeight(imageRef);

size_t bitsPerComponent = CGImageGetBitsPerComponent(imageRef);
size_t bitsPerPixel = CGImageGetBitsPerPixel(imageRef);

size_t bytesPerRow = CGImageGetBytesPerRow(imageRef);

CGColorSpaceRef colorSpace = CGImageGetColorSpace(imageRef);

CGBitmapInfo bitmapInfo = CGImageGetBitmapInfo(imageRef);


bool shouldInterpolate = CGImageGetShouldInterpolate(imageRef);

CGColorRenderingIntent intent = CGImageGetRenderingIntent(imageRef);

CGDataProviderRef dataProvider = CGImageGetDataProvider(imageRef);

CFDataRef data = CGDataProviderCopyData(dataProvider);

UInt8 *buffer = (UInt8*)CFDataGetBytePtr(data);

NSUInteger  x, y;
for (y = 0; y < height; y++) {
    for (x = 0; x < width; x++) {
        UInt8 *tmp;
        tmp = buffer + y * bytesPerRow + x * 4;

        UInt8 red,green,blue;
        red = *(tmp + 0);
        green = *(tmp + 1);
        blue = *(tmp + 2);

        UInt8 brightness;
        switch (type) {
            case 1:
                brightness = (77 * red + 28 * green + 151 * blue) / 256;
                *(tmp + 0) = brightness;
                *(tmp + 1) = brightness;
                *(tmp + 2) = brightness;
                break;
            case 2:
                *(tmp + 0) = red;
                *(tmp + 1) = green * 0.7;
                *(tmp + 2) = blue * 0.4;
                break;
            case 3:
                *(tmp + 0) = 255 - red;
                *(tmp + 1) = 255 - green;
                *(tmp + 2) = 255 - blue;
                break;
            default:
                *(tmp + 0) = red;
                *(tmp + 1) = green;
                *(tmp + 2) = blue;
                break;
        }
    }
}


CFDataRef effectedData = CFDataCreate(NULL, buffer, CFDataGetLength(data));

CGDataProviderRef effectedDataProvider = CGDataProviderCreateWithCFData(effectedData);

CGImageRef effectedCgImage = CGImageCreate(
                                           width, height,
                                           bitsPerComponent, bitsPerPixel, bytesPerRow,
                                           colorSpace, bitmapInfo, effectedDataProvider,
                                           NULL, shouldInterpolate, intent);

UIImage *effectedImage = [[UIImage alloc] initWithCGImage:effectedCgImage];

CGImageRelease(effectedCgImage);

CFRelease(effectedDataProvider);

CFRelease(effectedData);

CFRelease(data);

return effectedImage ;

}

pragma mark- 圖片識別程式碼

-(void)recognizeImageWithTesseract:(UIImage *)image
{
// Animate a progress activity indicator

// Create a new `G8RecognitionOperation` to perform the OCR asynchronously
// It is assumed that there is a .traineddata file for the language pack
// you want Tesseract to use in the "tessdata" folder in the root of the
// project AND that the "tessdata" folder is a referenced folder and NOT
// a symbolic group in your project
G8RecognitionOperation *operation = [[G8RecognitionOperation alloc] initWithLanguage:@"eng"];

// Use the original Tesseract engine mode in performing the recognition
// (see G8Constants.h) for other engine mode options
operation.tesseract.engineMode = G8OCREngineModeTesseractOnly;

// Let Tesseract automatically segment the page into blocks of text
// based on its analysis (see G8Constants.h) for other page segmentation
// mode options
operation.tesseract.pageSegmentationMode = G8PageSegmentationModeAutoOnly;

// Optionally limit the time Tesseract should spend performing the
// recognition
//operation.tesseract.maximumRecognitionTime = 1.0;

// Set the delegate for the recognition to be this class
// (see `progressImageRecognitionForTesseract` and
// `shouldCancelImageRecognitionForTesseract` methods below)
operation.delegate = self;

// Optionally limit Tesseract's recognition to the following whitelist
// and blacklist of characters
operation.tesseract.charWhitelist = @"0123456789";
//operation.tesseract.charBlacklist = @"56789";

// Set the image on which Tesseract should perform recognition
operation.tesseract.image = image;

// Optionally limit the region in the image on which Tesseract should
// perform recognition to a rectangle
//operation.tesseract.rect = CGRectMake(20, 20, 100, 100);

// Specify the function block that should be executed when Tesseract
// finishes performing recognition on the image
operation.recognitionCompleteBlock = ^(G8Tesseract *tesseract) {
    // Fetch the recognized text
    NSString *recognizedText = tesseract.recognizedText;

    DLog(@"－－－－－%@", recognizedText);
    NSString * str=[DzcDES trim:recognizedText];
    NSRange range=[str rangeOfString:@" "];
    if (range.location !=NSNotFound)
    {
        NSArray *array=[str componentsSeparatedByString:@" "];

        for(NSString *ss in array)
        {
            DLog(@"---%@",ss);
            NSString * s=[DzcDES trim:ss];
            if ([DzcDES validateIdentityCard:s])
            {
                DLog(@"字串為身份證號碼");
                dispatch_async(dispatch_get_main_queue(), ^{




                    [self.delegate PassImagedata:s];
                    [self dismissViewControllerAnimated:YES completion:nil];

                });
            }

        }
    }
    else
    {
        str=[DzcDES trim:str];
        if ([DzcDES validateIdentityCard:str])
        {
            dispatch_async(dispatch_get_main_queue(), ^{




                [self.delegate PassImagedata:str];
                [self dismissViewControllerAnimated:YES completion:nil];
            });
        }




    }


    // Remove the animated progress activity indicator


    // Spawn an alert with the recognized text


};

// Display the image to be recognized in the view


// Finally, add the recognition operation to the queue
[self.operationQueue addOperation:operation];

}
-(void)progressImageRecognitionForTesseract:(G8Tesseract *)tesseract
{
DLog(@”progress: %lu”, (unsigned long)tesseract.progress);
}
-(BOOL)shouldCancelImageRecognitionForTesseract:(G8Tesseract *)tesseract
{
return NO;
}
@end