C# OpenCV 部署RecRecNet广角图像畸变矫正

目录

说明

效果

模型信息

项目

代码

下载

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说明

ICCV2023 - RecRecNet: Rectangling Rectified Wide-Angle Images by Thin-Plate Spline Model and DoF-based Curriculum Learning

参考：

https://github.com/KangLiao929/RecRecNet

https://github.com/hpc203/recrecnet-opencv-dnn

效果

模型信息

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

Inputs
-------------------------
name：input
tensor：Float[1, 3, 256, 256]
---------------------------------------------------------------

Outputs
-------------------------
name：output
tensor：Float[1, 162]
---------------------------------------------------------------

项目

代码

using OpenCvSharp;
using OpenCvSharp.Dnn;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;

namespace OpenCvSharp_DNN_Demo
{
    public partial class frmMain : Form
    {
        public frmMain()
        {
            InitializeComponent();
        }

        string fileFilter = "图片|*.bmp;*.jpg;*.jpeg;*.tiff;*.tiff;*.png";
        string image_path = "";

        DateTime dt1 = DateTime.Now;
        DateTime dt2 = DateTime.Now;

        int inpHeight;
        int inpWidth;
        string modelpath;

        int grid_h = 8;
        int grid_w = 8;
        Mat grid;
        Mat W_inv;

        Net opencv_net;
        Mat BN_image;

        Mat image;
        Mat result_image;

        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)
        {
            modelpath = "model/model_deploy.onnx";

            inpHeight = 256;
            inpWidth = 256;

            opencv_net = CvDnn.ReadNetFromOnnx(modelpath);

            Common.get_norm_rigid_mesh_inv_grid(ref grid, ref W_inv, inpHeight, inpWidth, grid_h, grid_w);

            image_path = "test_img/10.jpg";
            pictureBox1.Image = new Bitmap(image_path);

        }

        private unsafe void button2_Click(object sender, EventArgs e)
        {
            if (image_path == "")
            {
                return;
            }
            textBox1.Text = "检测中，请稍等……";
            pictureBox2.Image = null;
            Application.DoEvents();

            image = new Mat(image_path);
            dt1 = DateTime.Now;

            Mat img = new Mat();

            Cv2.Resize(image, img, new OpenCvSharp.Size(inpWidth, inpHeight));

            img.ConvertTo(img, MatType.CV_32FC3, 1.0f / 127.5f, -1.0f);

            BN_image = CvDnn.BlobFromImage(img);

            //配置图片输入数据
            opencv_net.SetInput(BN_image);

            //模型推理，读取推理结果
            Mat[] outs = new Mat[1] { new Mat() };
            string[] outBlobNames = opencv_net.GetUnconnectedOutLayersNames().ToArray();

            opencv_net.Forward(outs, outBlobNames);

            dt2 = DateTime.Now;

            float* offset = (float*)outs[0].Data;

            Mat tp = new Mat();
            Mat ori_mesh_np_x = new Mat();
            Mat ori_mesh_np_y = new Mat();
            Common.get_ori_rigid_mesh_tp(tp, ori_mesh_np_x, ori_mesh_np_y, offset, inpHeight, inpWidth, grid_h, grid_w);
            Mat T = W_inv * tp;   
            T = T.T();    

            Mat T_g = T * grid;

            Mat output_tps = Common._interpolate(BN_image, T_g, new OpenCvSharp.Size(inpWidth, inpHeight));
            Mat rectangling_np = (output_tps + 1) * 127.5;
            rectangling_np.ConvertTo(rectangling_np, MatType.CV_8UC3);
            Mat input_np = (img + 1) * 127.5;

            List<Mat> outputs = new List<Mat>();
            outputs.Add(rectangling_np);
            outputs.Add(input_np);
            outputs.Add(ori_mesh_np_x);
            outputs.Add(ori_mesh_np_y);

            Mat input_with_mesh = Common.draw_mesh_on_warp(outputs[1], outputs[2], outputs[3]);

            Cv2.CvtColor(outputs[0], outputs[0], ColorConversionCodes.BGR2RGB);

            Cv2.ImShow("mesh", input_with_mesh);

            result_image = outputs[0].Clone();
            pictureBox2.Image = new Bitmap(result_image.ToMemoryStream());
            textBox1.Text = "推理耗时:" + (dt2 - dt1).TotalMilliseconds + "ms";

        }

        private void pictureBox2_DoubleClick(object sender, EventArgs e)
        {
            Common.ShowNormalImg(pictureBox2.Image);
        }

        private void pictureBox1_DoubleClick(object sender, EventArgs e)
        {
            Common.ShowNormalImg(pictureBox1.Image);
        }
    }
}
 

using OpenCvSharp;
using OpenCvSharp.Dnn;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;

namespace OpenCvSharp_DNN_Demo
{
    public partial class frmMain : Form
    {
        public frmMain()
        {
            InitializeComponent();
        }

        string fileFilter = "图片|*.bmp;*.jpg;*.jpeg;*.tiff;*.tiff;*.png";
        string image_path = "";

        DateTime dt1 = DateTime.Now;
        DateTime dt2 = DateTime.Now;

        int inpHeight;
        int inpWidth;
        string modelpath;

        int grid_h = 8;
        int grid_w = 8;
        Mat grid;
        Mat W_inv;

        Net opencv_net;
        Mat BN_image;

        Mat image;
        Mat result_image;

        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)
        {
            modelpath = "model/model_deploy.onnx";

            inpHeight = 256;
            inpWidth = 256;

            opencv_net = CvDnn.ReadNetFromOnnx(modelpath);

            Common.get_norm_rigid_mesh_inv_grid(ref grid, ref W_inv, inpHeight, inpWidth, grid_h, grid_w);

            image_path = "test_img/10.jpg";
            pictureBox1.Image = new Bitmap(image_path);

        }

        private unsafe void button2_Click(object sender, EventArgs e)
        {
            if (image_path == "")
            {
                return;
            }
            textBox1.Text = "检测中，请稍等……";
            pictureBox2.Image = null;
            Application.DoEvents();

            image = new Mat(image_path);
            dt1 = DateTime.Now;

            Mat img = new Mat();

            Cv2.Resize(image, img, new OpenCvSharp.Size(inpWidth, inpHeight));

            img.ConvertTo(img, MatType.CV_32FC3, 1.0f / 127.5f, -1.0f);

            BN_image = CvDnn.BlobFromImage(img);

            //配置图片输入数据
            opencv_net.SetInput(BN_image);

            //模型推理，读取推理结果
            Mat[] outs = new Mat[1] { new Mat() };
            string[] outBlobNames = opencv_net.GetUnconnectedOutLayersNames().ToArray();

            opencv_net.Forward(outs, outBlobNames);

            dt2 = DateTime.Now;

            float* offset = (float*)outs[0].Data;

            Mat tp = new Mat();
            Mat ori_mesh_np_x = new Mat();
            Mat ori_mesh_np_y = new Mat();
            Common.get_ori_rigid_mesh_tp(tp, ori_mesh_np_x, ori_mesh_np_y, offset, inpHeight, inpWidth, grid_h, grid_w);
            Mat T = W_inv * tp;   
            T = T.T();    

            Mat T_g = T * grid;

            Mat output_tps = Common._interpolate(BN_image, T_g, new OpenCvSharp.Size(inpWidth, inpHeight));
            Mat rectangling_np = (output_tps + 1) * 127.5;
            rectangling_np.ConvertTo(rectangling_np, MatType.CV_8UC3);
            Mat input_np = (img + 1) * 127.5;

            List<Mat> outputs = new List<Mat>();
            outputs.Add(rectangling_np);
            outputs.Add(input_np);
            outputs.Add(ori_mesh_np_x);
            outputs.Add(ori_mesh_np_y);

            Mat input_with_mesh = Common.draw_mesh_on_warp(outputs[1], outputs[2], outputs[3]);

            Cv2.CvtColor(outputs[0], outputs[0], ColorConversionCodes.BGR2RGB);

            Cv2.ImShow("mesh", input_with_mesh);

            result_image = outputs[0].Clone();
            pictureBox2.Image = new Bitmap(result_image.ToMemoryStream());
            textBox1.Text = "推理耗时:" + (dt2 - dt1).TotalMilliseconds + "ms";

        }

        private void pictureBox2_DoubleClick(object sender, EventArgs e)
        {
            Common.ShowNormalImg(pictureBox2.Image);
        }

        private void pictureBox1_DoubleClick(object sender, EventArgs e)
        {
            Common.ShowNormalImg(pictureBox1.Image);
        }
    }
}

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