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C# OpenCvSharp DNN Image Retouching

news 2025/6/23 22:01:37

介绍

模型

项目

效果

代码

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C# OpenCvSharp DNN Image Retouching

介绍

github地址：https://github.com/hejingwenhejingwen/CSRNet

(ECCV 2020) Conditional Sequential Modulation for Efficient Global Image Retouching

模型

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

Inputs
-------------------------
name：input
tensor：Float[1, 3, 360, 640]
---------------------------------------------------------------

Outputs
-------------------------
name：output
tensor：Float[1, 3, 360, 640]
---------------------------------------------------------------

项目

效果

代码

using OpenCvSharp;
using OpenCvSharp.Dnn;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Linq.Expressions;
using System.Numerics;
using System.Reflection;
using System.Windows.Forms;

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

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

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

string modelpath;

int inpHeight;
int inpWidth;

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/csrnet_360x640.onnx";

inpHeight = 360;
inpWidth = 640;

opencv_net = CvDnn.ReadNetFromOnnx(modelpath);

image_path = "test_img/0014.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);

int srch = image.Rows;
int srcw = image.Cols;

BN_image = CvDnn.BlobFromImage(image, 1 / 255.0, new OpenCvSharp.Size(inpWidth, inpHeight), new Scalar(0, 0, 0), true, false);

//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();

dt1 = DateTime.Now;

opencv_net.Forward(outs, outBlobNames);

dt2 = DateTime.Now;

float* pdata = (float*)outs[0].Data;
int out_h = outs[0].Size(2);
int out_w = outs[0].Size(3);
int channel_step = out_h * out_w;
float[] data = new float[channel_step * 3];
for (int i = 0; i < data.Length; i++)
{
data[i] = pdata[i] * 255;

if (data[i] < 0)
{
data[i] = 0;
}
else if (data[i] > 255)
{
data[i] = 255;
}
}

float[] temp_r = new float[out_h * out_w];
float[] temp_g = new float[out_h * out_w];
float[] temp_b = new float[out_h * out_w];

Array.Copy(data, temp_r, out_h * out_w);
Array.Copy(data, out_h * out_w, temp_g, 0, out_h * out_w);
Array.Copy(data, out_h * out_w * 2, temp_b, 0, out_h * out_w);

Mat rmat = new Mat(out_h, out_w, MatType.CV_32F, temp_r);
Mat gmat = new Mat(out_h, out_w, MatType.CV_32F, temp_g);
Mat bmat = new Mat(out_h, out_w, MatType.CV_32F, temp_b);

result_image = new Mat();
Cv2.Merge(new Mat[] { bmat, gmat, rmat }, result_image);

Cv2.Resize(result_image, result_image, new OpenCvSharp.Size(srcw, srch));

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.IO;
using System.Linq;
using System.Linq.Expressions;
using System.Numerics;
using System.Reflection;
using System.Windows.Forms;namespace OpenCvSharp_DNN_Demo
{public partial class frmMain : Form{public frmMain(){InitializeComponent();}string fileFilter = "*.*|*.bmp;*.jpg;*.jpeg;*.tiff;*.tiff;*.png";string image_path = "";DateTime dt1 = DateTime.Now;DateTime dt2 = DateTime.Now;string modelpath;int inpHeight;int inpWidth;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/csrnet_360x640.onnx";inpHeight = 360;inpWidth = 640;opencv_net = CvDnn.ReadNetFromOnnx(modelpath);image_path = "test_img/0014.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);int srch = image.Rows;int srcw = image.Cols;BN_image = CvDnn.BlobFromImage(image, 1 / 255.0, new OpenCvSharp.Size(inpWidth, inpHeight), new Scalar(0, 0, 0), true, false);//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();dt1 = DateTime.Now;opencv_net.Forward(outs, outBlobNames);dt2 = DateTime.Now;float* pdata = (float*)outs[0].Data;int out_h = outs[0].Size(2);int out_w = outs[0].Size(3);int channel_step = out_h * out_w;float[] data = new float[channel_step * 3];for (int i = 0; i < data.Length; i++){data[i] = pdata[i] * 255;if (data[i] < 0){data[i] = 0;}else if (data[i] > 255){data[i] = 255;}}float[] temp_r = new float[out_h * out_w];float[] temp_g = new float[out_h * out_w];float[] temp_b = new float[out_h * out_w];Array.Copy(data, temp_r, out_h * out_w);Array.Copy(data, out_h * out_w, temp_g, 0, out_h * out_w);Array.Copy(data, out_h * out_w * 2, temp_b, 0, out_h * out_w);Mat rmat = new Mat(out_h, out_w, MatType.CV_32F, temp_r);Mat gmat = new Mat(out_h, out_w, MatType.CV_32F, temp_g);Mat bmat = new Mat(out_h, out_w, MatType.CV_32F, temp_b);result_image = new Mat();Cv2.Merge(new Mat[] { bmat, gmat, rmat }, result_image);Cv2.Resize(result_image, result_image, new OpenCvSharp.Size(srcw, srch));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);}}
}