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C# OpenCvSharp 部署文档矫正，包括文档扭曲/模糊/阴影等情况

article 2025/1/21 12:39:35

目录

说明

效果

模型

项目

代码

下载

参考

C# OpenCvSharp 部署文档矫正，包括文档扭曲/模糊/阴影等情况

说明

地址：https://github.com/RapidAI/RapidUnDistort

修正文档扭曲/模糊/阴影等情况，使用onnx模型简单轻量部署，未来持续跟进最新最好的文档矫正方案和模型,Correct document distortion using a lightweight ONNX model for easy deployment. We will continue to follow and integrate the latest and best document correction solutions and models in the future. 

效果

模型

drnet.onnx

Model Properties
-------------------------
---------------------------------------------------------------

Inputs
-------------------------
name：input
tensor：Float[-1, 6, -1, -1]
---------------------------------------------------------------

Outputs
-------------------------
name：output
tensor：Float[-1, 3, -1, -1]
---------------------------------------------------------------

gcnet.onnx

Model Properties
-------------------------
---------------------------------------------------------------

Inputs
-------------------------
name：input
tensor：Float[-1, 3, -1, -1]
---------------------------------------------------------------

Outputs
-------------------------
name：output
tensor：Float[-1, 3, -1, -1]
---------------------------------------------------------------

nafdpm.onnx

Model Properties
-------------------------
---------------------------------------------------------------

Inputs
-------------------------
name：input
tensor：Float[-1, 3, -1, -1]
---------------------------------------------------------------

Outputs
-------------------------
name：output
tensor：Float[-1, -1, -1, -1]
---------------------------------------------------------------

unetcnn.onnx

Model Properties
-------------------------
---------------------------------------------------------------

Inputs
-------------------------
name：input
tensor：Float[-1, 3, -1, -1]
---------------------------------------------------------------

Outputs
-------------------------
name：output
tensor：Float[-1, 1, -1, -1]
---------------------------------------------------------------

uvdoc.onnx

Model Properties
-------------------------
---------------------------------------------------------------

Inputs
-------------------------
name：input
tensor：Float[-1, 3, -1, -1]
---------------------------------------------------------------

Outputs
-------------------------
name：output
tensor：Float[-1, 2, -1, -1]
name：546
tensor：Float[-1, 3, -1, -1]
---------------------------------------------------------------

项目

代码

using OpenCvSharp;
using System;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Imaging;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;

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

        Stopwatch stopwatch = new Stopwatch();
        Mat image;
        Mat out_img;
        string image_path;
        string startupPath;
        string fileFilter = "*.*|*.bmp;*.jpg;*.jpeg;*.tiff;*.tiff;*.png";
        const string DllName = "DocumentUndistortSharp.dll";
        IntPtr engine;

        /*
         //初始化
        extern "C" _declspec(dllexport) int __cdecl  init(void** engine, char* binary_model_path, char* unblur_model_path, char* unshadow_model_gcnet_path, char* unshadow_model_drnet_path, char* unwrap_model_path, char* msg);

        //binary
        extern "C" _declspec(dllexport) int __cdecl  binary(void* engine, Mat* srcimg, char* msg, Mat* out_img);

        //unblur
        extern "C" _declspec(dllexport) int __cdecl  unblur(void* engine, Mat* srcimg, char* msg, Mat* out_img);

        //unshadow
        extern "C" _declspec(dllexport) int __cdecl  unshadow(void* engine, Mat* srcimg, char* msg, Mat* out_img);

        //unwrap
        extern "C" _declspec(dllexport) int __cdecl  unwrap(void* engine, Mat* srcimg, char* msg, Mat* out_img);

        //openCvBilateral
        extern "C" _declspec(dllexport) int __cdecl  openCvBilateral(Mat* srcimg, char* msg, Mat* out_img);

        //释放
        extern "C" _declspec(dllexport) void __cdecl destroy(void* engine);
         */


        [DllImport(DllName, EntryPoint = "init", CallingConvention = CallingConvention.Cdecl)]
        internal extern static int init(ref IntPtr engine, string binary_model_path, string unblur_model_path, string unshadow_model_gcnet_path, string unshadow_model_drnet_path, string unwrap_model_path, StringBuilder msg);

        [DllImport(DllName, EntryPoint = "binary", CallingConvention = CallingConvention.Cdecl)]
        internal extern static int binary(IntPtr engine, IntPtr srcimg, StringBuilder msg, IntPtr out_img);

        [DllImport(DllName, EntryPoint = "unblur", CallingConvention = CallingConvention.Cdecl)]
        internal extern static int unblur(IntPtr engine, IntPtr srcimg, StringBuilder msg, IntPtr out_img);

        [DllImport(DllName, EntryPoint = "unshadow", CallingConvention = CallingConvention.Cdecl)]
        internal extern static int unshadow(IntPtr engine, IntPtr srcimg, StringBuilder msg, IntPtr out_img);

        [DllImport(DllName, EntryPoint = "unwrap", CallingConvention = CallingConvention.Cdecl)]
        internal extern static int unwrap(IntPtr engine, IntPtr srcimg, StringBuilder msg, IntPtr out_img);

        [DllImport(DllName, EntryPoint = "openCvBilateral", CallingConvention = CallingConvention.Cdecl)]
        internal extern static int openCvBilateral(IntPtr srcimg, StringBuilder msg, IntPtr out_img);

        [DllImport(DllName, EntryPoint = "destroy", CallingConvention = CallingConvention.Cdecl)]
        internal extern static int destroy(IntPtr engine);

        private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = fileFilter;
            if (ofd.ShowDialog() != DialogResult.OK) return;

            pictureBox1.Image = null;
            pictureBox2.Image = null;
            textBox1.Text = "";

            image_path = ofd.FileName;
            pictureBox1.Image = new Bitmap(image_path);
            image = new Mat(image_path);
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            startupPath = Application.StartupPath;

            string binary_model_path = startupPath + "\\model\\unetcnn.onnx";
            string unblur_model_path = startupPath + "\\model\\nafdpm.onnx";
            string unshadow_model_gcnet_path = startupPath + "\\model\\gcnet.onnx";
            string unshadow_model_drnet_path = startupPath + "\\model\\drnet.onnx";
            string unwrap_model_path = startupPath + "\\model\\uvdoc.onnx";

            StringBuilder msg = new StringBuilder(512);

            int res = init(ref engine, binary_model_path, unblur_model_path, unshadow_model_gcnet_path, unshadow_model_drnet_path, unwrap_model_path, msg);
            if (res == -1)
            {
                MessageBox.Show(msg.ToString());
                return;
            }
            else
            {
                Console.WriteLine(msg.ToString());
            }
            image_path = startupPath + "\\test_img\\2.jpg";
            pictureBox1.Image = new Bitmap(image_path);
            image = new Mat(image_path);
        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            destroy(engine);
        }

        /// <summary>
        /// unwrap
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {
            if (image_path == "")
            {
                return;
            }

            textBox1.Text = "执行中……";
            Application.DoEvents();

            if (image != null) image.Dispose();
            if (out_img != null) out_img.Dispose();
            if (pictureBox1.Image != null) pictureBox1.Image.Dispose();

            StringBuilder msg = new StringBuilder(512);
            image = new Mat(image_path);
            out_img = new Mat();

            stopwatch.Restart();

            int res = unwrap(engine, image.CvPtr, msg, out_img.CvPtr);
            if (res == 0)
            {
                stopwatch.Stop();
                double costTime = stopwatch.Elapsed.TotalMilliseconds;
                pictureBox2.Image = new Bitmap(out_img.ToMemoryStream());
                textBox1.Text = $"耗时:{costTime:F2}ms";
            }
            else
            {
                textBox1.Text = "失败," + msg.ToString();
            }
        }

        /// <summary>
        /// openCvBilateral
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button7_Click(object sender, EventArgs e)
        {
            if (image_path == "")
            {
                return;
            }

            textBox1.Text = "执行中……";
            Application.DoEvents();

            if (image != null) image.Dispose();
            if (out_img != null) out_img.Dispose();
            if (pictureBox1.Image != null) pictureBox1.Image.Dispose();

            StringBuilder msg = new StringBuilder(512);
            image = new Mat(image_path);
            out_img = new Mat();

            stopwatch.Restart();

            int res = openCvBilateral(image.CvPtr, msg, out_img.CvPtr);
            if (res == 0)
            {
                stopwatch.Stop();
                double costTime = stopwatch.Elapsed.TotalMilliseconds;
                pictureBox2.Image = new Bitmap(out_img.ToMemoryStream());
                textBox1.Text = $"耗时:{costTime:F2}ms";
            }
            else
            {
                textBox1.Text = "失败," + msg.ToString();
            }
        }

        /// <summary>
        /// unshadow
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button6_Click(object sender, EventArgs e)
        {
            if (image_path == "")
            {
                return;
            }

            textBox1.Text = "执行中……";
            Application.DoEvents();

            if (image != null) image.Dispose();
            if (out_img != null) out_img.Dispose();
            if (pictureBox1.Image != null) pictureBox1.Image.Dispose();

            StringBuilder msg = new StringBuilder(512);
            image = new Mat(image_path);
            out_img = new Mat();

            stopwatch.Restart();

            int res = unshadow(engine, image.CvPtr, msg, out_img.CvPtr);
            if (res == 0)
            {
                stopwatch.Stop();
                double costTime = stopwatch.Elapsed.TotalMilliseconds;
                pictureBox2.Image = new Bitmap(out_img.ToMemoryStream());
                textBox1.Text = $"耗时:{costTime:F2}ms";
            }
            else
            {
                textBox1.Text = "失败," + msg.ToString();
            }
        }

        /// <summary>
        /// unblur
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button5_Click(object sender, EventArgs e)
        {
            if (image_path == "")
            {
                return;
            }

            textBox1.Text = "执行中……";
            Application.DoEvents();

            if (image != null) image.Dispose();
            if (out_img != null) out_img.Dispose();
            if (pictureBox1.Image != null) pictureBox1.Image.Dispose();

            StringBuilder msg = new StringBuilder(512);
            image = new Mat(image_path);
            out_img = new Mat();

            stopwatch.Restart();

            int res = unblur(engine, image.CvPtr, msg, out_img.CvPtr);
            if (res == 0)
            {
                stopwatch.Stop();
                double costTime = stopwatch.Elapsed.TotalMilliseconds;
                pictureBox2.Image = new Bitmap(out_img.ToMemoryStream());
                textBox1.Text = $"耗时:{costTime:F2}ms";
            }
            else
            {
                textBox1.Text = "失败," + msg.ToString();
            }
        }

        /// <summary>
        /// binary
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button4_Click(object sender, EventArgs e)
        {
            if (image_path == "")
            {
                return;
            }

            textBox1.Text = "执行中……";
            Application.DoEvents();

            if (image != null) image.Dispose();
            if (out_img != null) out_img.Dispose();
            if (pictureBox1.Image != null) pictureBox1.Image.Dispose();

            StringBuilder msg = new StringBuilder(512);
            image = new Mat(image_path);
            out_img = new Mat();

            stopwatch.Restart();

            int res = binary(engine, image.CvPtr, msg, out_img.CvPtr);
            if (res == 0)
            {
                stopwatch.Stop();
                double costTime = stopwatch.Elapsed.TotalMilliseconds;
                pictureBox2.Image = new Bitmap(out_img.ToMemoryStream());
                textBox1.Text = $"耗时:{costTime:F2}ms";
            }
            else
            {
                textBox1.Text = "失败," + msg.ToString();
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (pictureBox2.Image == null)
            {
                return;
            }
            Bitmap output = new Bitmap(pictureBox2.Image);
            var sdf = new SaveFileDialog();
            sdf.Title = "保存";
            sdf.Filter = "Images (*.jpg)|*.jpg|Images (*.png)|*.png|Images (*.bmp)|*.bmp";
            if (sdf.ShowDialog() == DialogResult.OK)
            {
                switch (sdf.FilterIndex)
                {
                    case 1:
                        {
                            output.Save(sdf.FileName, ImageFormat.Jpeg);
                            break;
                        }
                    case 2:
                        {
                            output.Save(sdf.FileName, ImageFormat.Png);
                            break;
                        }
                    case 3:
                        {
                            output.Save(sdf.FileName, ImageFormat.Bmp);
                            break;
                        }
                }
                MessageBox.Show("保存成功，位置：" + sdf.FileName);
            }
        }
    }
}
 

using OpenCvSharp;
using System;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Imaging;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;

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

        Stopwatch stopwatch = new Stopwatch();
        Mat image;
        Mat out_img;
        string image_path;
        string startupPath;
        string fileFilter = "*.*|*.bmp;*.jpg;*.jpeg;*.tiff;*.tiff;*.png";
        const string DllName = "DocumentUndistortSharp.dll";
        IntPtr engine;

        /*
         //初始化
        extern "C" _declspec(dllexport) int __cdecl  init(void** engine, char* binary_model_path, char* unblur_model_path, char* unshadow_model_gcnet_path, char* unshadow_model_drnet_path, char* unwrap_model_path, char* msg);

        //binary
        extern "C" _declspec(dllexport) int __cdecl  binary(void* engine, Mat* srcimg, char* msg, Mat* out_img);

        //unblur
        extern "C" _declspec(dllexport) int __cdecl  unblur(void* engine, Mat* srcimg, char* msg, Mat* out_img);

        //unshadow
        extern "C" _declspec(dllexport) int __cdecl  unshadow(void* engine, Mat* srcimg, char* msg, Mat* out_img);

        //unwrap
        extern "C" _declspec(dllexport) int __cdecl  unwrap(void* engine, Mat* srcimg, char* msg, Mat* out_img);

        //openCvBilateral
        extern "C" _declspec(dllexport) int __cdecl  openCvBilateral(Mat* srcimg, char* msg, Mat* out_img);

        //释放
        extern "C" _declspec(dllexport) void __cdecl destroy(void* engine);
         */


        [DllImport(DllName, EntryPoint = "init", CallingConvention = CallingConvention.Cdecl)]
        internal extern static int init(ref IntPtr engine, string binary_model_path, string unblur_model_path, string unshadow_model_gcnet_path, string unshadow_model_drnet_path, string unwrap_model_path, StringBuilder msg);

        [DllImport(DllName, EntryPoint = "binary", CallingConvention = CallingConvention.Cdecl)]
        internal extern static int binary(IntPtr engine, IntPtr srcimg, StringBuilder msg, IntPtr out_img);

        [DllImport(DllName, EntryPoint = "unblur", CallingConvention = CallingConvention.Cdecl)]
        internal extern static int unblur(IntPtr engine, IntPtr srcimg, StringBuilder msg, IntPtr out_img);

        [DllImport(DllName, EntryPoint = "unshadow", CallingConvention = CallingConvention.Cdecl)]
        internal extern static int unshadow(IntPtr engine, IntPtr srcimg, StringBuilder msg, IntPtr out_img);

        [DllImport(DllName, EntryPoint = "unwrap", CallingConvention = CallingConvention.Cdecl)]
        internal extern static int unwrap(IntPtr engine, IntPtr srcimg, StringBuilder msg, IntPtr out_img);

        [DllImport(DllName, EntryPoint = "openCvBilateral", CallingConvention = CallingConvention.Cdecl)]
        internal extern static int openCvBilateral(IntPtr srcimg, StringBuilder msg, IntPtr out_img);

        [DllImport(DllName, EntryPoint = "destroy", CallingConvention = CallingConvention.Cdecl)]
        internal extern static int destroy(IntPtr engine);

        private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = fileFilter;
            if (ofd.ShowDialog() != DialogResult.OK) return;

            pictureBox1.Image = null;
            pictureBox2.Image = null;
            textBox1.Text = "";

            image_path = ofd.FileName;
            pictureBox1.Image = new Bitmap(image_path);
            image = new Mat(image_path);
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            startupPath = Application.StartupPath;

            string binary_model_path = startupPath + "\\model\\unetcnn.onnx";
            string unblur_model_path = startupPath + "\\model\\nafdpm.onnx";
            string unshadow_model_gcnet_path = startupPath + "\\model\\gcnet.onnx";
            string unshadow_model_drnet_path = startupPath + "\\model\\drnet.onnx";
            string unwrap_model_path = startupPath + "\\model\\uvdoc.onnx";

            StringBuilder msg = new StringBuilder(512);

            int res = init(ref engine, binary_model_path, unblur_model_path, unshadow_model_gcnet_path, unshadow_model_drnet_path, unwrap_model_path, msg);
            if (res == -1)
            {
                MessageBox.Show(msg.ToString());
                return;
            }
            else
            {
                Console.WriteLine(msg.ToString());
            }
            image_path = startupPath + "\\test_img\\2.jpg";
            pictureBox1.Image = new Bitmap(image_path);
            image = new Mat(image_path);
        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            destroy(engine);
        }

        /// <summary>
        /// unwrap
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {
            if (image_path == "")
            {
                return;
            }

            textBox1.Text = "执行中……";
            Application.DoEvents();

            if (image != null) image.Dispose();
            if (out_img != null) out_img.Dispose();
            if (pictureBox1.Image != null) pictureBox1.Image.Dispose();

            StringBuilder msg = new StringBuilder(512);
            image = new Mat(image_path);
            out_img = new Mat();

            stopwatch.Restart();

            int res = unwrap(engine, image.CvPtr, msg, out_img.CvPtr);
            if (res == 0)
            {
                stopwatch.Stop();
                double costTime = stopwatch.Elapsed.TotalMilliseconds;
                pictureBox2.Image = new Bitmap(out_img.ToMemoryStream());
                textBox1.Text = $"耗时:{costTime:F2}ms";
            }
            else
            {
                textBox1.Text = "失败," + msg.ToString();
            }
        }

        /// <summary>
        /// openCvBilateral
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button7_Click(object sender, EventArgs e)
        {
            if (image_path == "")
            {
                return;
            }

            textBox1.Text = "执行中……";
            Application.DoEvents();

            if (image != null) image.Dispose();
            if (out_img != null) out_img.Dispose();
            if (pictureBox1.Image != null) pictureBox1.Image.Dispose();

            StringBuilder msg = new StringBuilder(512);
            image = new Mat(image_path);
            out_img = new Mat();

            stopwatch.Restart();

            int res = openCvBilateral(image.CvPtr, msg, out_img.CvPtr);
            if (res == 0)
            {
                stopwatch.Stop();
                double costTime = stopwatch.Elapsed.TotalMilliseconds;
                pictureBox2.Image = new Bitmap(out_img.ToMemoryStream());
                textBox1.Text = $"耗时:{costTime:F2}ms";
            }
            else
            {
                textBox1.Text = "失败," + msg.ToString();
            }
        }

        /// <summary>
        /// unshadow
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button6_Click(object sender, EventArgs e)
        {
            if (image_path == "")
            {
                return;
            }

            textBox1.Text = "执行中……";
            Application.DoEvents();

            if (image != null) image.Dispose();
            if (out_img != null) out_img.Dispose();
            if (pictureBox1.Image != null) pictureBox1.Image.Dispose();

            StringBuilder msg = new StringBuilder(512);
            image = new Mat(image_path);
            out_img = new Mat();

            stopwatch.Restart();

            int res = unshadow(engine, image.CvPtr, msg, out_img.CvPtr);
            if (res == 0)
            {
                stopwatch.Stop();
                double costTime = stopwatch.Elapsed.TotalMilliseconds;
                pictureBox2.Image = new Bitmap(out_img.ToMemoryStream());
                textBox1.Text = $"耗时:{costTime:F2}ms";
            }
            else
            {
                textBox1.Text = "失败," + msg.ToString();
            }
        }

        /// <summary>
        /// unblur
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button5_Click(object sender, EventArgs e)
        {
            if (image_path == "")
            {
                return;
            }

            textBox1.Text = "执行中……";
            Application.DoEvents();

            if (image != null) image.Dispose();
            if (out_img != null) out_img.Dispose();
            if (pictureBox1.Image != null) pictureBox1.Image.Dispose();

            StringBuilder msg = new StringBuilder(512);
            image = new Mat(image_path);
            out_img = new Mat();

            stopwatch.Restart();

            int res = unblur(engine, image.CvPtr, msg, out_img.CvPtr);
            if (res == 0)
            {
                stopwatch.Stop();
                double costTime = stopwatch.Elapsed.TotalMilliseconds;
                pictureBox2.Image = new Bitmap(out_img.ToMemoryStream());
                textBox1.Text = $"耗时:{costTime:F2}ms";
            }
            else
            {
                textBox1.Text = "失败," + msg.ToString();
            }
        }

        /// <summary>
        /// binary
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button4_Click(object sender, EventArgs e)
        {
            if (image_path == "")
            {
                return;
            }

            textBox1.Text = "执行中……";
            Application.DoEvents();

            if (image != null) image.Dispose();
            if (out_img != null) out_img.Dispose();
            if (pictureBox1.Image != null) pictureBox1.Image.Dispose();

            StringBuilder msg = new StringBuilder(512);
            image = new Mat(image_path);
            out_img = new Mat();

            stopwatch.Restart();

            int res = binary(engine, image.CvPtr, msg, out_img.CvPtr);
            if (res == 0)
            {
                stopwatch.Stop();
                double costTime = stopwatch.Elapsed.TotalMilliseconds;
                pictureBox2.Image = new Bitmap(out_img.ToMemoryStream());
                textBox1.Text = $"耗时:{costTime:F2}ms";
            }
            else
            {
                textBox1.Text = "失败," + msg.ToString();
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (pictureBox2.Image == null)
            {
                return;
            }
            Bitmap output = new Bitmap(pictureBox2.Image);
            var sdf = new SaveFileDialog();
            sdf.Title = "保存";
            sdf.Filter = "Images (*.jpg)|*.jpg|Images (*.png)|*.png|Images (*.bmp)|*.bmp";
            if (sdf.ShowDialog() == DialogResult.OK)
            {
                switch (sdf.FilterIndex)
                {
                    case 1:
                        {
                            output.Save(sdf.FileName, ImageFormat.Jpeg);
                            break;
                        }
                    case 2:
                        {
                            output.Save(sdf.FileName, ImageFormat.Png);
                            break;
                        }
                    case 3:
                        {
                            output.Save(sdf.FileName, ImageFormat.Bmp);
                            break;
                        }
                }
                MessageBox.Show("保存成功，位置：" + sdf.FileName);
            }
        }
    }
}

下载

源码下载

参考

https://github.com/hpc203/document-undistort-onnxrun


http://www.kler.cn/a/512084.html

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