我确信它很容易,但似乎找不到任何有答案的人。 我有一个图像,我需要从该图像中切出一个圆或甚至其他形状。我需要这个代码在.net c#中。我在课堂上这样做,所以它不是wpf或winform。 我需要传递x和y pos以及圆的大小。
其他选项是AForge,ImageStatistics。我需要得到一个圆圈(图像的一部分)并获得StdDev。
感谢您的帮助。 安德鲁
- 更新为chris post。
这是c#中的chris帖子。不像他那么干净,但却是一个开始。
public System.Drawing.Image x(string sourceFile, int circleUpperLeftX, int circleUpperLeftY, int circleDiameter)
{
Bitmap SourceImage = new Bitmap(System.Drawing.Image.FromFile(sourceFile));
Rectangle CropRect = new Rectangle(circleUpperLeftX, circleUpperLeftY, circleDiameter, circleDiameter);
Bitmap CroppedImage = SourceImage.Clone(CropRect, SourceImage.PixelFormat);
TextureBrush TB = new TextureBrush(CroppedImage);
Bitmap FinalImage = new Bitmap(circleDiameter, circleDiameter);
Graphics G = Graphics.FromImage(FinalImage);
G.FillEllipse(TB, 0, 0, circleDiameter, circleDiameter);
return FinalImage;
}
答案 0 :(得分:5)
您可以使用TextureBrush。下面的代码将图像裁剪为正方形,然后将其加载到纹理画笔中,最后使用该画笔绘制椭圆/圆形:
Private Shared Function CropImageToCircle(ByVal sourceFile As String, ByVal circleUpperLeftX As Integer, ByVal circleUpperLeftY As Integer, ByVal circleDiameter As Integer) As Image
''//Load our source image
Using SourceImage As New Bitmap(Image.FromFile(sourceFile))
''//Create a rectangle that crops a square of our image
Dim CropRect As New Rectangle(circleUpperLeftX, circleUpperLeftY, circleDiameter, circleDiameter)
''//Crop the image to that square
Using CroppedImage = SourceImage.Clone(CropRect, SourceImage.PixelFormat)
''//Create a texturebrush to draw our circle with
Using TB As New TextureBrush(CroppedImage)
''//Create our output image
Dim FinalImage As New Bitmap(circleDiameter, circleDiameter)
''//Create a graphics object to draw with
Using G = Graphics.FromImage(FinalImage)
''//Draw our cropped image onto the output image as an ellipse with the same width/height (circle)
G.FillEllipse(TB, 0, 0, circleDiameter, circleDiameter)
Return FinalImage
End Using
End Using
End Using
End Using
End Function
答案 1 :(得分:3)
制作一个与原始尺寸和像素格式相匹配的新Bitmap。 从新的位图创建图形。 将图形剪辑设置为新圆。 将原始图像绘制到新图形上。
public Bitmap ClipToCircle(Bitmap original, PointF center, float radius)
{
Bitmap copy = new Bitmap(original);
using (Graphics g = Graphics.FromImage(copy)) {
RectangleF r = new RectangleF(center.X - radius, center.Y - radius, radius * 2, radius * 2);
GraphicsPath path = new GraphicsPath();
path.AddEllipse(r);
g.Clip = new Region(path);
g.DrawImage(original, 0, 0);
return copy;
}
}
答案 2 :(得分:0)
See this。您需要调用GDI +类(在C#中没有问题)来获得所需的功能。
答案 3 :(得分:0)
此代码可能对您有帮助 Screenshot
类代码:
@property
def getusernametextbox(self):
return Browser.webDriverWait.until(ec.visibility_of_element_located((By.ID, "login_email")))
@property
def getpasswordtextbox(self):
return Browser.webDriverWait.until(ec.visibility_of_element_located((By.CSS_SELECTOR, "tr[id=mockpass] input")))
@property
def getloginbutton(self):
return Browser.webDriverWait.until(ec.element_to_be_clickable((By.NAME, "login")))
def login(self):
self.getusernametextbox.send_keys("myuser@gmail.com")
self.getpasswordtextbox.send_keys("12345678")
self.getloginbutton.click()
Form1.cs
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
public class ImageHelper
{
public Image CropImage(Image img)
{
int x = img.Width/2;
int y = img.Height/2;
int r = Math.Min(x, y);
Bitmap tmp = null;
tmp = new Bitmap(2 * r, 2 * r);
using (Graphics g = Graphics.FromImage(tmp))
{
g.SmoothingMode = SmoothingMode.AntiAlias;
g.TranslateTransform(tmp.Width / 2, tmp.Height / 2);
GraphicsPath gp = new GraphicsPath();
gp.AddEllipse(0 - r, 0 - r, 2 * r, 2 * r);
Region rg = new Region(gp);
g.SetClip(rg, CombineMode.Replace);
Bitmap bmp = new Bitmap(img);
g.DrawImage(bmp, new Rectangle(-r, -r, 2 * r, 2 * r), new Rectangle(x - r, y - r, 2 * r, 2 * r), GraphicsUnit.Pixel);
}
return tmp;
}
public void SaveImage(Image img,string path,ImageFormat imageFormat)
{
img.Save(path, imageFormat);
}
}
}