目录
效果
灰度图
黑白色反转
彩色反转
项目
代码
cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using OpenCvSharp;
using OpenCvSharp.Extensions;
namespace OpenCvSharp_颜色反转
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private string fileFilter = "*.*|*.bmp;*.jpg;*.jpeg;*.tiff;*.tiff;*.png";
Bitmap bmp;
String imgPath = "";
private void button2_Click(object sender, EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = fileFilter;
if (ofd.ShowDialog() != DialogResult.OK) return;
imgPath = ofd.FileName;
bmp = new Bitmap(imgPath);
pictureBox1.Image = bmp;
}
private void button1_Click(object sender, EventArgs e)
{
if (imgPath == "")
{
return;
}
Mat mat = new Mat(imgPath);
Cv2.CvtColor(mat, mat, ColorConversionCodes.BGR2GRAY);
Mat dst = new Mat(mat.Height, mat.Width, mat.Type(), Scalar.White);
byte grayPixel = 0;
for (int r = 0; r < dst.Rows; r++)
{
for (int c = 0; c < dst.Cols; c++)
{
grayPixel = mat.At<byte>(r, c);
dst.Set<byte>(r, c, (byte)(255 - grayPixel));
}
}
if (pictureBox2.Image != null)
{
pictureBox2.Image.Dispose();
}
pictureBox2.Image = BitmapConverter.ToBitmap(dst);
}
private void button4_Click(object sender, EventArgs e)
{
if (imgPath == "")
{
return;
}
Mat mat = new Mat(imgPath);
Cv2.CvtColor(mat, mat, ColorConversionCodes.BGR2GRAY);
if (pictureBox2.Image != null)
{
pictureBox2.Image.Dispose();
}
pictureBox2.Image = BitmapConverter.ToBitmap(mat);
}
private void button3_Click(object sender, EventArgs e)
{
if (imgPath == "")
{
return;
}
Mat mat = new Mat(imgPath);
Mat dst = new Mat(mat.Height, mat.Width, mat.Type(), Scalar.White);
Vec3b vec3B;
for (int r = 0; r < dst.Rows; r++)
{
for (int c = 0; c < dst.Cols; c++)
{
vec3B = mat.At<Vec3b>(r, c);
vec3B.Item0 = (byte)(255 - vec3B.Item0);
vec3B.Item1 = (byte)(255 - vec3B.Item1);
vec3B.Item2 = (byte)(255 - vec3B.Item2);
dst.Set<Vec3b>(r, c, vec3B);
}
}
if (pictureBox2.Image != null)
{
pictureBox2.Image.Dispose();
}
pictureBox2.Image = BitmapConverter.ToBitmap(dst);
}
}
}