1 using (Bitmap bmp = new Bitmap(scanImgPath))
2 {
3 Bitmap bitmap = new Bitmap(bmp.Width, bmp.Height, PixelFormat.Format16bppRgb555);
4 using (Graphics draw = Graphics.FromImage(bitmap))
5 {
6 draw.DrawImage(bmp, 0, 0, bitmap.Width, bitmap.Height);
7 picScanImg.Image = bitmap as Image;
8 }
9 }
1 using System;
2 using System.Collections.Generic;
3 using System.Drawing;
4 using System.Text;
5
6 namespace TJCFinanceWriteOff.BizLogic.Common
7 {
8 public class ImageUtil
9 {
10 /// <summary>
11 /// 图片镜像翻转
12 /// </summary>
13 /// <param name="imagePath">图片路径</param>
14 /// <param name="isCover">是否覆盖</param>
15 /// <returns></returns>
16 public static Image ImageFlip(string imagePath,bool isCover = false)
17 {
18 Bitmap bitmap = Bitmap.FromFile(imagePath) as Bitmap;
19 bitmap.RotateFlip(RotateFlipType.Rotate180FlipY); //图片镜像翻转
20 if (isCover is true) bitmap.Save(imagePath,System.Drawing.Imaging.ImageFormat.Jpeg);
21 return bitmap;
22 }
23
24 /// <summary>
25 /// 图片顺时针旋转180度
26 /// </summary>
27 /// <param name="imagePath">图片路径</param>
28 /// <param name="isCover">是否覆盖</param>
29 /// <returns></returns>
30 public static Image ImageRotate(string imagePath,bool isCover = false)
31 {
32 Bitmap bitmap = Bitmap.FromFile(imagePath) as Bitmap;
33 bitmap.RotateFlip(RotateFlipType.Rotate180FlipNone); //图片顺时针180度
34 if (isCover is true) bitmap.Save(imagePath,System.Drawing.Imaging.ImageFormat.Jpeg);
35 return bitmap;
36 }
37
38 /// <summary>
39 /// 图片等比缩放
40 /// </summary>
41 /// <param name="imagePath"></param>
42 /// <returns></returns>
43 public static Image ImageScaleZoom(string imagePath, double process)
44 {
45 Bitmap bitmap = Bitmap.FromFile(imagePath) as Bitmap;
46 double width = bitmap.Width * process; ;//图片最终的宽
47 double height = bitmap.Height * process;//图片最终的高
48 return bitmap.GetThumbnailImage((int)width, (int)height, () => { return false; }, IntPtr.Zero);
49 }
50
51 public static Image ImageScaleZoom(Image sourceImage, double process)
52 {
53 double width = sourceImage.Width * process; ;//图片最终的宽
54 double height = sourceImage.Height * process;//图片最终的高
55 try
56 {
57 System.Drawing.Imaging.ImageFormat format = sourceImage.RawFormat;
58 Bitmap targetPicture = new Bitmap((int)width, (int)height);
59 Graphics g = Graphics.FromImage(targetPicture);
60 g.DrawImage(sourceImage, 0, 0, (int)width, (int)height);
61 sourceImage.Dispose();
62 return targetPicture;
63 }
64 catch (Exception ex)
65 {
66
67 }
68 return null;
69 }
70
71 public static Image ImageAssignZoom(Image sourceImage, int targetWidth, int targetHeight)
72 {
73 int width;//图片最终的宽
74 int height;//图片最终的高
75 try
76 {
77 System.Drawing.Imaging.ImageFormat format = sourceImage.RawFormat;
78 Bitmap targetPicture = new Bitmap(targetWidth, targetHeight);
79 Graphics g = Graphics.FromImage(targetPicture);
80
81 if (sourceImage.Width > targetWidth && sourceImage.Height <= targetHeight)
82 {
83 width = targetWidth;
84 height = (width * sourceImage.Height) / sourceImage.Width; //噶
85 }
86 else if (sourceImage.Width <= targetWidth && sourceImage.Height > targetHeight)
87 {
88 height = targetHeight;
89 width = (height * sourceImage.Width) / sourceImage.Height;
90 }
91 else if (sourceImage.Width <= targetWidth && sourceImage.Height <= targetHeight)
92 {
93 width = sourceImage.Width;
94 height = sourceImage.Height;
95 }
96 else
97 {
98 width = targetWidth;
99 height = (width * sourceImage.Height) / sourceImage.Width;
100 if (height > targetHeight)
101 {
102 height = targetHeight;
103 width = (height * sourceImage.Width) / sourceImage.Height;
104 }
105 }
106 g.DrawImage(sourceImage, 0, 0, width, height);
107 sourceImage.Dispose();
108
109 return targetPicture;
110 }
111 catch (Exception ex)
112 {
113
114 }
115 return null;
116 }
117 }
118 }
