using?OpenCvSharp;
using?OpenCvSharp.Extensions;
using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.IO;
using?System.Linq;
using?System.Text;
using?System.Windows.Forms;

namespace?OpenCVSharpDemo
{
????public?partial?class?Form1?:?Form
????{
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}

????????string?fileName;
????????Mat?mat;

????????private?void?Form1_Load（object?sender?EventArgs?e）
????????{
????????????fileName?=?@Application.StartupPath?+?@“\test.png“;
????????????mat?=?new?Mat（fileName）;
????????????pictureBox1.SizeMode?=?PictureBoxSizeMode.Zoom;
????????????pictureBox1.Image?=?mat.ToBitmap（）;
????????}

????????public?void?findTextRegion（Mat?dilation）
????????{
????????????//?1.?查找輪廓
????????????OpenCvSharp.Point[][]?contours;
????????????HierarchyIndex[]?hierarchly;
????????????Rect?biggestContourRect?=?new?Rect（）;

????????????Cv2.FindContours（dilation?out?contours?out?hierarchly?RetrievalModes.Tree?ContourApproximationModes.ApproxSimple）;

????????????//?2.?篩選那些面積小的
????????????int?i?=?0;
????????????foreach?（OpenCvSharp.Point[]?contour?in?contours）
????????????{
????????????????double?area?=?Cv2.ContourArea（contour）;

????????????????//面積小的都篩選掉
????????????????if?（area?????????????????{
????????????????????continue;
????????????????}

????????????????//輪廓近似，作用很小
????????????????double?epsilon?=?0.001?*?Cv2.ArcLength（contour?true）;

????????????????//找到最小的矩形
????????????????biggestContourRect?=?Cv2.BoundingRect（contour）;

????????????????if?（biggestContourRect.Height?>?（biggestContourRect.Width?*?1.2））
????????????????{
????????????????????continue;
????????????????}

????????????????//畫線
????????????????mat.Rectangle（biggestContourRectnew?Scalar（0?255?0）?2）;
????????????}

????????????pictureBox1.Image?=?mat.ToBitmap（）;
????????????//Cv2.ImShow（“img“?mat）;
????????}


????????public?Mat?preprocess（string?imgPath）
????????{
????????????Mat?dilation2?=?new?Mat（）;

????????????//讀取灰度圖
????????????using?（Mat?src?=?new?Mat（imgPath?ImreadModes.Grayscale））
????????????{
????????????????//1.Sobel算子，x方向求梯度
????????????????Mat?sobel?=?new?Mat（）;
????????????????Cv2.Sobel（src?sobel?MatType.CV_8U?1?0?3）;

????????????????//2.二值化
????????????????Mat?binary?=?new?Mat（）;
????????????????Cv2.Threshold（sobel?binary?0?255?ThresholdTypes.Otsu?|?ThresholdTypes.Binary）;

????????????????//3.?膨脹和腐蝕操作的核函數(shù)
????????????????Mat?element1?=?new?Mat（）;
????????????????Mat?element2?=?new?Mat（）;
????????????????OpenCvSharp.Size?size1?=?new?OpenCvSharp.Size（30?9）;
????????????????OpenCvSharp.Size?size2?=?new?OpenCvSharp.Size（24?6）;

????????????????element1?=?Cv2.GetStructuringElement（MorphShapes.Rect?size1）;
????????????????element2?=?Cv2.GetStructuringElement（MorphShapes.Rect?size2）;

????????????????//4.?膨脹一次，讓輪廓突出
????????????????Mat?dilation?=?new?Mat（）;
????????????????Cv2.Dilate（binary?dilation?element2）;

?????

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2020-04-26?06:48??OpenCVSharpDemo-master\
?????文件??????????10??2020-04-26?06:48??OpenCVSharpDemo-master\.gitignore
?????目錄???????????0??2020-04-26?06:48??OpenCVSharpDemo-master\.vs\
?????目錄???????????0??2020-04-26?06:48??OpenCVSharpDemo-master\.vs\OpenCVSharpDemo\
?????目錄???????????0??2020-04-26?06:48??OpenCVSharpDemo-master\.vs\OpenCVSharpDemo\v16\
?????文件???????90112??2020-04-26?06:48??OpenCVSharpDemo-master\.vs\OpenCVSharpDemo\v16\.suo
?????目錄???????????0??2020-04-26?06:48??OpenCVSharpDemo-master\.vs\OpenCVSharpDemo\v16\Server\
?????目錄???????????0??2020-04-26?06:48??OpenCVSharpDemo-master\.vs\OpenCVSharpDemo\v16\Server\sqlite3\
?????文件???????????0??2020-04-26?06:48??OpenCVSharpDemo-master\.vs\OpenCVSharpDemo\v16\Server\sqlite3\db.lock
?????文件??????622592??2020-04-26?06:48??OpenCVSharpDemo-master\.vs\OpenCVSharpDemo\v16\Server\sqlite3\storage.ide
?????文件???????32768??2020-04-26?06:48??OpenCVSharpDemo-master\.vs\OpenCVSharpDemo\v16\Server\sqlite3\storage.ide-shm
?????文件??????197792??2020-04-26?06:48??OpenCVSharpDemo-master\.vs\OpenCVSharpDemo\v16\Server\sqlite3\storage.ide-wal
?????文件????????1126??2020-04-26?06:48??OpenCVSharpDemo-master\OpenCVSharpDemo.sln
?????目錄???????????0??2020-04-26?06:48??OpenCVSharpDemo-master\OpenCVSharpDemo\
?????文件??????????10??2020-04-26?06:48??OpenCVSharpDemo-master\OpenCVSharpDemo\.gitignore
?????文件????????3324??2020-04-26?06:48??OpenCVSharpDemo-master\OpenCVSharpDemo\Form1.Designer.cs
?????文件????????3702??2020-04-26?06:48??OpenCVSharpDemo-master\OpenCVSharpDemo\Form1.cs
?????文件????????5698??2020-04-26?06:48??OpenCVSharpDemo-master\OpenCVSharpDemo\Form1.resx
?????文件????????5421??2020-04-26?06:48??OpenCVSharpDemo-master\OpenCVSharpDemo\OpenCVSharpDemo.csproj
?????文件?????????475??2020-04-26?06:48??OpenCVSharpDemo-master\OpenCVSharpDemo\Program.cs
?????目錄???????????0??2020-04-26?06:48??OpenCVSharpDemo-master\OpenCVSharpDemo\Properties\
?????文件????????1286??2020-04-26?06:48??OpenCVSharpDemo-master\OpenCVSharpDemo\Properties\AssemblyInfo.cs
?????文件????????2772??2020-04-26?06:48??OpenCVSharpDemo-master\OpenCVSharpDemo\Properties\Resources.Designer.cs
?????文件????????5496??2020-04-26?06:48??OpenCVSharpDemo-master\OpenCVSharpDemo\Properties\Resources.resx
?????文件????????1072??2020-04-26?06:48??OpenCVSharpDemo-master\OpenCVSharpDemo\Properties\Settings.Designer.cs
?????文件?????????242??2020-04-26?06:48??OpenCVSharpDemo-master\OpenCVSharpDemo\Properties\Settings.settings
?????文件?????????152??2020-04-26?06:48??OpenCVSharpDemo-master\OpenCVSharpDemo\packages.config
?????文件???????79127??2020-04-26?06:48??OpenCVSharpDemo-master\OpenCVSharpDemo\test.png
?????文件??????????71??2020-04-26?06:48??OpenCVSharpDemo-master\README.md