[C#][WinForm]如何合併圖片
看到網友發問，自己隨手記錄一下。
一般合併圖片大多情況有三種，水平、垂直、浮水印，這裡簡單實做一下。
來源兩張圖片
水平合併
private Image HorizontalMergeImages(Image img1, Image img2)
{
Image MergedImage = default(Image);
Int32 Wide = 0;
Int32 High = 0;
Wide = img1.Width + img2.Width;//設定寬度
if (img1.Height >= img2.Height)
{
High = img1.Height;
}
else
{
High = img2.Height;
}
Bitmap mybmp = new Bitmap(Wide, High);
Graphics gr = Graphics.FromImage(mybmp);
//處理第一張圖片
gr.DrawImage(img1, 0, 0);
//處理第二張圖片
gr.DrawImage(img2, img1.Width, 0);
MergedImage = mybmp;
gr.Dispose();
return MergedImage;
} 結果
垂直合併
private Image HorizontalMergeImages(Image img1, Image img2)
{
Image MergedImage = default(Image);
Int32 Wide = 0;
Int32 High = 0;
High = img1.Height + img2.Height;//設定高度
if (img1.Width >= img2.Width)
{
Wide = img1.Width;
}
else
{
Wide = img2.Width;
}
Bitmap mybmp = new Bitmap(Wide, High);
Graphics gr = Graphics.FromImage(mybmp);
//處理第一張圖片
gr.DrawImage(img1, 0, 0);
//處理第二張圖片
gr.DrawImage(img2, 0, img1.Height);
MergedImage = mybmp;
gr.Dispose();
return MergedImage;
} 結果
圖片浮水印
private Image MarkImage(Image img1, Image img2)
{
Image MergedImage = default(Image);
//設定背景圖片
Graphics gr = System.Drawing.Graphics.FromImage(img1);
//新建logo浮水印圖片
Bitmap Logo = new Bitmap(img2.Width, img2.Height);
Graphics tgr = Graphics.FromImage(Logo);
ColorMatrix cmatrix = new ColorMatrix();
//設定圖片色彩(透明度)
cmatrix.Matrix33 = 0.5F;
ImageAttributes imgattributes = new ImageAttributes();
imgattributes.SetColorMatrix(cmatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
tgr.DrawImage(img2, new Rectangle(0, 0, Logo.Width, Logo.Height), 0, 0, Logo.Width, Logo.Height, GraphicsUnit.Pixel, imgattributes);
tgr.Dispose();
//logo圖片位置
gr.DrawImage(Logo, img1.Width/3,10);
gr.Dispose();
MergedImage = img1;
return MergedImage;
}結果
