在不丢失右下像素部分的情况下,用c#调整图像大小
我有一个c类,大致如下:在不丢失右下像素部分的情况下,用c#调整图像大小,c#,image,graphics,resize,C#,Image,Graphics,Resize,我有一个c类,大致如下: class ImageContainer { Image image; internal ImageContainer getResized(int width, int height) { Bitmap bmp = new Bitmap(width, height); //Create a System.Drawing.Graphics object from the Bitmap which we will use to draw the
class ImageContainer
{
Image image;
internal ImageContainer getResized(int width, int height)
{
Bitmap bmp = new Bitmap(width, height);
//Create a System.Drawing.Graphics object from the Bitmap which we will use to draw the high quality scaled image
System.Drawing.Graphics gr = System.Drawing.Graphics.FromImage(bmp);
//Set the System.Drawing.Graphics object property SmoothingMode to HighQuality
gr.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//Set the System.Drawing.Graphics object property CompositingQuality to HighQuality
gr.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
//Set the System.Drawing.Graphics object property InterpolationMode to High
gr.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
//Draw the original image into the target Graphics object scaling to the desired width and height
System.Drawing.Rectangle rectDestination = new System.Drawing.Rectangle(0, 0, width, height);
gr.DrawImage(image, rectDestination, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel);
//dispose / release resources
ImageContainer ic = new ImageContainer();
ic.image = bmp;
return ic;
}
}
调整大小效果很好,但在缩小图像时,DrawImage不会绘制最右边和较低的像素碎片。通过
gr.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
:)