Emgucv不完整图像分割试验(五)——透视变换&&OCR（自带的Tesseract）

再次吐槽Emgucv的版本升级后代码不能用，修正代码如下：

                        PointF[] srcquad = new PointF[4];
                        PointF[] dstquad = new PointF[4];

                        srcquad[0] = pa;
                        srcquad[1] = pc;
                        srcquad[2] = pd;
                        srcquad[3] = pb;

                        dstquad[0] = new PointF(0, 0);
                        dstquad[1] = new PointF(this.imageBox2.Width, 0);
                        dstquad[2] = new PointF(0, this.imageBox2.Height);
                        dstquad[3] = new PointF(this.imageBox2.Width, this.imageBox2.Height);


                        Image<Bgr, byte> tempRGBimage = 原始图.ToImage<Bgr, byte>();
                        Image<Bgr, byte> tempSmallImage = new Image<Bgr, byte>(this.imageBox2.Size);
                        //生成透视变换矩阵
                        //Emgu.CV.CameraCalibration.GetPerspectiveTransform();IntPtr map_matrix=new Matrix<double>(3,3);

                        //进行透视变换(第三个参数决定了矩形框之外的部分进行处理的方式，现在所选为用黑色填充)

                        Mat transformation = CvInvoke.EstimateRigidTransform(srcquad, dstquad, true);


                        CvInvoke.WarpAffine(tempRGBimage, tempSmallImage, transformation, this.imageBox2.Size);

                        this.imageBox2.Image = tempSmallImage;

自带的Tesseract也是，版本升级后有报错，修正代码如下：

            _ocr = new Tesseract("", "eng",OcrEngineMode.TesseractLstmCombined);
            _ocr.SetVariable("tessedit_char_whitelist", "0123456789");

            List<Bitmap> CutImage_List = new List<Bitmap>();

            try
            {

                Image<Gray, byte> gray = new Image<Gray, byte>(new Bitmap(this.imageBox2.Image.Bitmap));
                _ocr.SetImage(gray);//就这一步，否则会报内存错误
                _ocr.Recognize();
                    
                 Tesseract.Character[] charactors = _ocr.GetCharacters();

                for (int i = 0; i < charactors.Length; i++)
                { this.textBox5.Text += charactors[i].Text; }


            }
            catch (Exception exception)
            {
                MessageBox.Show(exception.Message);
            }

最后结果如图：

 

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