maketransparent的简单介绍
如何用c#将一张图片均匀分割成大小相等的图片，最好有代码！ 能发给我一份代码吗，谢谢
正好软糖做过这个软件^o^，切割图片并保存一堆小图片到FileName-###.png
效果图
软糖切图 - 核心代码
using?System;
using?System.Drawing;
using?System.Drawing.Imaging;
using?System.Drawing.Drawing2D;
using?System.IO;
namespace?软糖切图
{
????public?class?网格精灵
????{
????????public?string?文件地址;
????????public?string?输出目录;
????????public?string?输出后缀名?=?@".png";
????????public?static?string?命名格式?=?@"{0}_{1}_{2}";
????????public?Bitmap?原始;
????????public?Bitmap?当前;
????????public?ImageFormat?图像格式;
????????public?Graphics?画板;
????????public?Color?透明色;
????????public?Pen?网格画笔?=?new?Pen(Color.FromArgb(255,?255,?0,?255),?2);
????????public?Color?无效区域色?=?Color.White;
????????public?Brush?背景画刷?=?new?HatchBrush(HatchStyle.LightDownwardDiagonal,?
????????????Color.White,Color.LightGray);
????????public?int?OX?=?0;
????????public?int?OY?=?0;
????????public?int?W;
????????public?int?H;
????????public?int?iX;
????????public?int?iY;
????????public?bool?显示网格?=?true;
????????public?void?打开(string?文件地址)
????????{
????????????装载位图(?new?Bitmap(文件地址));
????????}
????????public?void?装载位图(Bitmap?位图)
????????{
????????????原始?=?位图;
????????????图像格式?=?ImageFormat.Png;
????????????自动调整网格();
????????????当前?=?new?Bitmap(原始,?原始.Size);
????????????画板?=?Graphics.FromImage(当前);
????????}
????????public?void?重新装载()
????????{
????????????当前?=?new?Bitmap(原始,?原始.Size);
????????????画板?=?Graphics.FromImage(当前);
????????}
????????public?void?重新绘制()
????????{
????????????if?(原始?==?null)?{?return;?}
????????????绘制位图(画板);
????????????绘制网格(画板);
????????}
????????public?void?调整网格线宽度(float?宽度)
????????{
????????????if?(宽度?=?0)?{?显示网格?=?false;?}?else?{?显示网格?=?true;?}
????????????网格画笔.Width?=?宽度;
????????????重新绘制();
????????}
????????private?void?自动调整网格()
????????{
????????????if?(原始.Width??W)?{?W?=?原始.Width;?}
????????????if?(原始.Height??H)?{?H?=?原始.Height;?}
????????????//计算格子数量
????????????iX?=?(int)((原始.Width?-?OX)?/?W);
????????????iY?=?(int)((原始.Height?-?OY)?/?H);
????????}
????????private?void?绘制位图(Graphics?v画板)
????????{
????????????v画板.Clear(无效区域色);
????????????if?(当前?==?null)?{?return;?}
????????????Rectangle?RECT?=?new?Rectangle(0,?0,?当前.Width,?当前.Height);
????????????v画板.FillRectangle(背景画刷,?RECT);
????????????v画板.DrawImage(原始,?RECT);
????????}
????????private?void?绘制网格(Graphics?v画板)
????????{
????????????//检查位图和格子宽高
????????????if?(当前?==?null)?{?return;?}
????????????if?(显示网格?==?false)?{?return;?}
????????????if?(W?=?0)?{?W?=?32;?}
????????????if?(H?=?0)?{?H?=?32;?}
????????????//计算格子数量
????????????iX?=?(int)((当前.Width?-?OX)?/?W);
????????????iY?=?(int)((当前.Height?-?OY)?/?H);
????????????//检查格子数量
????????????if?(iX??1)?{?return;?}
????????????if?(iY??1)?{?return;?}
????????????//绘制网格线
????????????int?x1,?x2,?y1,?y2;
????????????for?(int?x?=?1;?x?=?iX?+?1;?x++)
????????????{
????????????????x1?=?(x?-?1)?*?W?-?OX;
????????????????y1?=?0;
????????????????x2?=?x1;
????????????????y2?=?当前.Height;
????????????????v画板.DrawLine(网格画笔,?x1,?y1,?x2,?y2);
????????????}
????????????for?(int?y?=?1;?y?=?iY?+?1;?y++)
????????????{
????????????????x1?=?0;
????????????????y1?=?(y?-?1)?*?H?-?OY;
????????????????x2?=?当前.Width;
????????????????y2?=?y1;
????????????????v画板.DrawLine(网格画笔,?x1,?y1,?x2,?y2);
????????????}
????????}
????????public?Color?取色(int?x,int?y)
????????{
????????????if?(当前?==?null){?return?Color.Black;?}
????????????return?当前.GetPixel(x,?y);
????????}
????????public?void?开关透明(bool?透明)
????????{
????????????if?(当前?==?null)?{?return;?}
????????????//重新装载();
????????????if?(透明)
????????????{
????????????????当前.MakeTransparent(透明色);
????????????}
????????????重新绘制();
????????}
????????public?void?裁剪()
????????{
????????????//检查位图和格子宽高
????????????if?(当前?==?null)?{?return;?}
????????????if?(W?=?0)?{?W?=?32;?}
????????????if?(H?=?0)?{?H?=?32;?}
????????????//计算格子数量
????????????iX?=?(int)((当前.Width?-?OX)?/?W);
????????????iY?=?(int)((当前.Height?-?OY)?/?H);
????????????//检查格子数量
????????????if?(iX?=?1)?{?return;?}
????????????if?(iY?=?1)?{?return;?}
????????????//剪辑位图并保存???????????
????????????for?(int?y?=?1;?y?=?iY;?y++)
????????????{
????????????????for?(int?x?=?1;?x?=?iX;?x++)
????????????????{
????????????????????int?i?=?x?+?(y?-?1)?*?iX;
????????????????????Rectangle?源矩形?=?new?Rectangle(
????????????????????????(x?-?1)?*?W?-?OX,?(y?-?1)?*?H?-?OY,?W,?H);
????????????????????Rectangle?目标矩形?=?new?Rectangle(0,?0,?W,?H);
????????????????????Bitmap?t剪辑?=?new?Bitmap(W,?H,?PixelFormat.Format32bppArgb);
????????????????????Graphics?g?=?Graphics.FromImage(t剪辑);
????????????????????g.DrawImage(当前,?目标矩形,?源矩形,?GraphicsUnit.Pixel);
????????????????????g.Dispose();
????????????????????string?路径?=?Path.Combine(输出目录,?获取文件名(i)?+?获取后缀名());
????????????????????t剪辑.Save(路径,?图像格式);
????????????????}
????????????}
????????}
????????private?string?获取文件名(int?ID)
????????{
????????????string?文件名?=?System.IO.Path.GetFileNameWithoutExtension(文件地址);
????????????string?strID?=?ID.ToString();
????????????string?strDate?=?DateTime.Now.ToString("yyyyMMdd");
????????????return?string.Format(命名格式,?文件名,?strID,?strDate);
????????}
????????private?string?获取后缀名()
????????{
????????????return?输出后缀名;
????????}
????}
}
调用方法
精灵.打开(文件地址);
精灵.W?=?32;?//每个分割方块的宽度
精灵.H?=?32;?//每个分割方块的高度
//精灵.透明色?=?Color.FromArgb(255,255,255);?//需要透明色就删掉注释
//精灵.开关透明?=?true;
精灵.输出目录?=?@"D:\Out";
精灵.裁剪();
C#程序设计窗体如何将导入的图片背景变成透明？
c#好像只支持png格式的透明。bmp和jpg不支持透明。
图片透明方法：
bitmap2 = new Bitmap(文件路径或Image对象);
bitmap2.MakeTransparent(Color.White);
如果你要做游戏的话，多个picturebox是会互相覆盖的(即使图片透明)。
所以要使用GDI绘图的方法，才能透明。
Graphics1 = Form1.CreateGraphics();
Graphics1.DrawImage(位图, X, Y, 宽, 高);
C#怎么去了图片背景色并且可以调亮度
您好，软糖来回答把，我做过一个去图片背景的程序。
核心实现就3句话，主要使用Bitmap.MakeTransparent方法
Bitmap?bitmap2?=?new?Bitmap(pictureBox1.Image);
bitmap2.MakeTransparent(背景色);
pictureBox2.Image?=?bitmap2;
如果想要调整亮度，就要应用到GDI的图像特性ImageAttributes了
我这里有封装好的图像特性：
using?System;
using?System.Drawing;
using?System.Drawing.Drawing2D;
using?System.Drawing.Imaging;
namespace?引擎.绘图.GDI
{
????public?class?图像特性?:?IDisposable?{
????????public?图像特性()?{
????????????M特性?=?new?ImageAttributes();
????????????M矩阵?=?原始矩阵();
????????}
????????public?图像特性(float?透明度)?{
????????????M特性?=?new?ImageAttributes();
????????????M矩阵?=?原始矩阵();
????????????this.透明度?=?透明度;
????????}
????????public?图像特性(float?透明度,?float?gamma)?{
????????????M特性?=?new?ImageAttributes();
????????????M矩阵?=?原始矩阵();????????
????????????this.透明度?=?透明度;
????????????M特性.SetGamma(gamma,?ColorAdjustType.Bitmap);
????????}
????????ImageAttributes?M特性;
????????ColorMatrix?M矩阵;
????????float?M亮度?=?1.0f;
????????bool?M灰化?=?false;
????????public?ColorMatrixFlag?灰色底纹?=?ColorMatrixFlag.Default;
????????public?ColorAdjustType?色彩校正模式?=?ColorAdjustType.Default;
????????public?ImageAttributes?资源?{?get?{?return?获取资源();?}?}
????????protected?virtual?ImageAttributes?获取资源()?{?return?M特性;?}
????????protected?virtual?void?设置资源(ImageAttributes?v特性)?{?M特性?=?v特性;?}
????????public?ColorMatrix?矩阵?{?get?{?return?M矩阵;?}?}?
????????public?void?透明色?(?Color?颜色?)?{?M特性.SetColorKey(颜色,?颜色);?}
????????public?void?设置gamma?(?float?gamma?)?{?M特性.SetGamma(gamma,?ColorAdjustType.Bitmap);?}
????????public?void?清除色彩校正?()?{?M特性.SetNoOp(色彩校正模式);?}
????????public?bool?灰化?{?get?{?return?M灰化;?}?set?{?M灰化?=?value;?灰度化(value);?}?}
????????public?float?透明度?{?get?{?return?M矩阵[3,?3];?}?set?{?M矩阵[3,?3]?=?value;?应用矩阵();?}?}
????????public?float?R浓度?{?get?{?return?M矩阵[0,?0];?}?set?{?M矩阵[0,?0]?=?value;?应用矩阵();?}?}
????????public?float?G浓度?{?get?{?return?M矩阵[1,?1];?}?set?{?M矩阵[1,?1]?=?value;?应用矩阵();?}?}
????????public?float?B浓度?{?get?{?return?M矩阵[2,?2];?}?set?{?M矩阵[2,?2]?=?value;?应用矩阵();?}?}
????????public?void?设置浓度?(?Color?C?)
????????{
????????????float?r?=?(float)C.R?/?255f;
????????????float?g?=?(float)C.G?/?255f;
????????????float?b?=?(float)C.B?/?255f;
????????????float?a?=?(float)C.A?/?255f;
????????????M矩阵[0,?0]?=?r;
????????????M矩阵[1,?1]?=?g;
????????????M矩阵[2,?2]?=?b;
????????????M矩阵[3,?3]?=?a;
????????????应用矩阵();
????????}
????????public?void?设置浓度?(?float?R,?float?G,?float?B)
????????{
????????????M矩阵[0,?0]?=?R;
????????????M矩阵[1,?1]?=?G;
????????????M矩阵[2,?2]?=?B;
????????????应用矩阵();
????????}
????????public?float?亮度
????????{
????????????get?{?return?M亮度;?}?
????????????set?
????????????{
????????????????M亮度?=?value;
????????????????M矩阵[4,?0]?=?M亮度;
????????????????M矩阵[4,?1]?=?M亮度;
????????????????M矩阵[4,?2]?=?M亮度;
????????????????应用矩阵();?
????????????}?
????????}
????????public?ColorMatrix?原始矩阵?(?)
????????{?
????????????????float[][]?t颜色矩阵元素?=?{?
????????????????new?float[]?{1,??0,??0,??0,??0},????????//?red?scaling?factor?of?2
????????????????new?float[]?{0,??1,??0,??0,??0},????????//?green?scaling?factor?of?1
????????????????new?float[]?{0,??0,??1,??0,??0},????????//?blue?scaling?factor?of?1
????????????????new?float[]?{0,??0,??0,??1,??0},????????//?alpha?scaling?factor?of?1
????????????????new?float[]?{0,??0,??0,??0,??1}};
????????????return?new?ColorMatrix(t颜色矩阵元素);??????
????????}
????????public?void?应用矩阵?(?)??{?
????????????if?(M矩阵?==?null)?{?M矩阵?=?原始矩阵();?};
????????????M特性.SetColorMatrix(M矩阵);
????????}
????????public?void?应用矩阵(Color?C)?{
????????????float[][]?t颜色矩阵元素?=?{
????????????????new?float[]?{?C.R?/?255f,??0,??0,??0,??0},????
????????????????new?float[]?{0,?C.G?/?255f,??0,??0,??0},?????
????????????????new?float[]?{0,??0,?C.B?/?255f,??0,??0},??????
????????????????new?float[]?{0,??0,??0,?C.A?/?255f,??0},????
????????????????new?float[]?{0,??0,??0,??0,??1}};
????????????M矩阵?=??new?ColorMatrix(t颜色矩阵元素);
????????????M特性.SetColorMatrix(M矩阵);
????????}
????????public?void?清空矩阵?(?)?{?M特性.ClearColorMatrix();?}
????????protected?void?灰度化(bool?应用)
????????{
????????????if?(应用?==?true)
????????????{
????????????????M矩阵[0,?0]?=?0.3f;?M矩阵[0,?1]?=?0.3f;?M矩阵[0,?2]?=?0.3f;
????????????????M矩阵[1,?0]?=?0.59f;?M矩阵[1,?1]?=?0.59f;?M矩阵[1,?2]?=?0.59f;
????????????????M矩阵[2,?0]?=?0.11f;?M矩阵[2,?1]?=?0.11f;?M矩阵[2,?2]?=?0.11f;
????????????????应用矩阵();
????????????}
????????????else?
????????????{
????????????????float?A?=?M矩阵[3,?3];
????????????????float?L0?=?M矩阵[4,?0];?float?L1?=?M矩阵[4,?1];?float?L2?=?M矩阵[4,?2];
????????????????M矩阵?=?原始矩阵();
????????????????M矩阵[3,?3]=A;M矩阵[4,?0]=L0;M矩阵[4,?1]=L1;M矩阵[4,?2]=L2;
????????????????应用矩阵();
????????????}
????????}
????????public?void?Dispose()
????????{
????????????M特性.Dispose();
????????}
????}
}
用法
首先new一个图像特性
然后图像特性.亮度= 0.1f ~ 10.0f (设置float表示十分之一或十倍亮度)
最后调用绘制图像()方法，把图像特性填进去。
//画纸是Graphics
public?GraphicsUnit?绘图单位?=?GraphicsUnit.Pixel;
public?void?绘制图像(Bitmap?图像,?int?X,?int?Y,?int?宽,?int?高,?图像特性?特性)
{?画纸.DrawImage(位图,?new?Rectangle(X,?Y,?宽,?高),?
0,?0,?图像.Width,?图像.Height,?绘图单位,?特性.资源);?}
满意请采纳，谢谢。
C# 怎样设置bitmap格式图片的透明度
C#可以使用Bitmap.MakeTransparent 方法 (Color)，使指定的颜色对此?Bitmap?透明。
参考代码如下：
public?void?MakeTransparent(
Color?transparentColor
)
参数介绍如下：
名称：transparentColor
类型：System.Drawing.Color
Color?结构，它表示要使之透明的颜色。
命名空间：??System.Drawing
程序集：??System.Drawing（在 System.Drawing.dll 中）