本文实例为大家分享了c#图像处理的具体代码，供大家参考，具体内容如下
（1）在form1窗体中的picturebox1控件中显示通过openfiledialog指定的图像文件内容。
将sizemode设置成stretchimage
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private void 打开toolstripmenuitem_click(object sender, eventargs e) { openfiledialog open = new openfiledialog(); open.filter = "所有文件|*.*"; if (open.showdialog() == dialogresult.ok) { bitmap im = new bitmap(open.filename); picturebox1.image = im; //picturebox1.sizemode = pictureboxsizemode.stretchimage; } } |
（2）编制一个图像格式转换的应用程序，实现bmp图像与jpeg图像的格式转换。
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private void bmptoolstripmenuitem_click(object sender, eventargs e) { bitmap box = new bitmap(picturebox1.image); savefiledialog sv1 = new savefiledialog(); sv1.filter = "bmp|*.bmp"; sv1.showdialog(); string str = sv1.filename; box.save(str, system.drawing.imaging.imageformat.bmp); } private void jpegtoolstripmenuitem_click(object sender, eventargs e) { bitmap box = new bitmap(picturebox1.image); savefiledialog sv1 = new savefiledialog(); sv1.filter = "jpeg文件|*.jpeg"; sv1.showdialog(); string str = sv1.filename; box.save(str, system.drawing.imaging.imageformat.jpeg); } |
（3）在窗体中添加两个picturebox，然后利用openfiledialog控件选择一彩色图像文件并在picturebox1中加载，然后将这一彩色图像转换为灰度图像，并在picturebox2中进行显示，将此图像保存为a.bmp。
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private void 灰度toolstripmenuitem_click(object sender, eventargs e) { picturebox2.sizemode = pictureboxsizemode.stretchimage; color c = new color(); bitmap b1 = new bitmap(picturebox1.image); int rr, gg, bb, cc; for (int i = 0; i < picturebox1.image.width; i++) { for (int j = 0; j < picturebox1.image.height; j++) { c = b1.getpixel(i, j); rr = c.r; gg = c.g; bb = c.b; cc = (int)((rr + gg + bb) / 3); if (cc < 0) cc = 0; if (cc > 255) cc = 255; color nc = color.fromargb(cc, cc, cc); b1.setpixel(i, j, nc); } } picturebox2.refresh(); picturebox2.image = b1; }private void 灰度图像存储toolstripmenuitem_click(object sender, eventargs e) { if (picturebox2.image != null) { bitmap box = new bitmap(picturebox2.image); savefiledialog sv1 = new savefiledialog(); sv1.filter = "bmp文件|*.bmp"; sv1.showdialog(); string str = sv1.filename; box.save(str, system.drawing.imaging.imageformat.bmp); //picturebox2.sizemode = pictureboxsizemode.stretchimage; } else messagebox.show("没有生成灰度图像"); } |
（4）将（3）中制作的a.bmp图像加载到picturebox1，把a.bmp转换为二值图像，并在picturebox2中进行显示。
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private void 转化toolstripmenuitem_click(object sender, eventargs e) { //bitmap m = new bitmap(picturebox1.width, picturebox1.height); bitmap map=new bitmap(picturebox1.image); color c; for (int i = 0; i < map.height; i++) { for (int j = 0; j < map.width; j++) { c = map.getpixel(j, i); if (c.r > 100) c = color.fromargb(255, 255, 255); //红色分量值大于100则设成白色 else c = color.black; map.setpixel(j, i, c); } } picturebox2.image = map; picturebox2.sizemode = pictureboxsizemode.stretchimage; } |
（5）建立对比度增强算法，并对a.bmp图像进行对比度增强，显示在picturebox2中显示出来,与picturebox1中的a.bmp图像进行比较。
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private void 对比toolstripmenuitem_click(object sender, eventargs e) { color c = new color(); bitmap box1 = new bitmap(picturebox1.image); int lev=30, wid=170; int[] map = new int[256]; for(int i=0;i<=lev;i++) { map[i]=0; } for (int i=lev;i<=wid;i++) //对比度增强 { map[i] = (int)((i * 1.0 - lev) / wid * 255); } for (int i = lev + wid; i < 256; i++) { map[i] = 255; } int gray; for (int i = 0; i < box1.width; i++) { for (int j = 0; j < box1.height; j++) { c = box1.getpixel(i, j); gray = c.r; c = color.fromargb(map[gray], map[gray], map[gray]); box1.setpixel(i, j, c); } } picturebox2.image = box1; picturebox2.sizemode = pictureboxsizemode.stretchimage; } |
灰度图像：
二值图像:
对比度增强：
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/theArcticOcean/article/details/50172559
