C# OpenCvSharp DNN Low Light image Enhancement

目录

介绍

效果

模型信息

项目

代码

下载

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C# OpenCvSharp DNN Low Light image Enhancement

介绍

github地址：https://github.com/zhenqifu/PairLIE

效果

模型信息

Model Properties

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Inputs

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name：input

tensor：Float[1, 3, 512, 512]

name：exposure

tensor：Float[1]

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Outputs

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name：output

tensor：Float[1, 3, 512, 512]

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项目

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/pairlie_512x512.onnx";

inpHeight = 512;

inpWidth = 512;

opencv_net = CvDnn.ReadNetFromOnnx(modelpath);

image_path = "test_img/1.png";

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);

opencv_net.SetInput(BN_image, "input");

Mat one = new Mat(1,1,MatType.CV_32F,new float[] { 0.5f});

Mat exposure = CvDnn.BlobFromImage(one);

opencv_net.SetInput(exposure, "exposure");

//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);

result_image.ConvertTo(result_image, MatType.CV_8UC3);

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/pairlie_512x512.onnx";

            inpHeight = 512;
            inpWidth = 512;

            opencv_net = CvDnn.ReadNetFromOnnx(modelpath);

            image_path = "test_img/1.png";
            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);

            opencv_net.SetInput(BN_image, "input");

            Mat one = new Mat(1,1,MatType.CV_32F,new float[] { 0.5f});
            Mat exposure = CvDnn.BlobFromImage(one);

            opencv_net.SetInput(exposure, "exposure");

            //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);

            result_image.ConvertTo(result_image, MatType.CV_8UC3);

            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);
        }
    }
}

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