/// <summary>
/// 图像逻辑运算
/// </summary>
/// <param name="bgImage">二值背景</param>
/// <param name="fgImage">二值前景</param>
/// <param name="logicMethod">逻辑运算方法</param>
/// <returns></returns>
public Bitmap LogicOperate(Bitmap bgImage, Bitmap fgImage, LogicMethod logicMethod)
{
Bitmap dstImage = (Bitmap)bgImage.Clone();
Graphics g = System.Drawing.Graphics.FromImage(dstImage);
// 计算有效区域
Region validRegion = bgRegion;
validRegion.Intersect(fgRegion);
RectangleF validRect = validRegion.GetBounds(g);
RectangleF fgRect = fgRegion.GetBounds(g);
RegionClip bgRegionClip = new RegionClip(validRegion);
Bitmap background = bgRegionClip.Hold((Bitmap)bgImage.Clone());
RegionClip fgRegionClip = new RegionClip(validRegion);
validRegion.Translate(-fgRect.X, -fgRect.Y);
Bitmap foreground = fgRegionClip.Hold((Bitmap)fgImage.Clone());
validRegion.Translate(fgRect.X, fgRect.Y);
// 先将原始二值图转化为二维数组
byte[,] bgGray = Image2Array(background);
byte[,] fgGray = Image2Array(foreground);
// 进行逻辑运算处理后的灰度二维数组
byte[,] dstGray = null;
// 进行逻辑运算
switch (logicMethod)
{
case LogicMethod.And:
dstGray = LogicAnd(bgGray, fgGray);
break;
case LogicMethod.Or:
dstGray = LogicOr(bgGray, fgGray);
break;
case LogicMethod.Xor:
dstGray = LogicXor(bgGray, fgGray);
break;
}
// 将二值数组转化为灰度图
Bitmap validImage = Array2Image(dstGray);
g.DrawImage(validImage, validRect,
new Rectangle(0, 0, (int)validRect.Width, (int)validRect.Height), GraphicsUnit.Pixel);
bgImage.Dispose();
fgImage.Dispose();
return(dstImage);
} // end of LogicOperate
/// <summary>
/// 图像代数运算
/// </summary>
/// <param name="bgImage">背景</param>
/// <param name="fgImage">前景</param>
/// <param name="algebraMethod">代数运算方法</param>
/// <returns></returns>
public Bitmap AlgebraOperate(Bitmap bgImage, Bitmap fgImage, AlgebraMethod algebraMethod)
{
// 计算有效区域
Region validRegion = bgRegion;
validRegion.Intersect(fgRegion);
RegionClip rc = new RegionClip(validRegion);
Bitmap background = rc.Hold((Bitmap)bgImage.Clone());
Bitmap dstImage = rc.Remove((Bitmap)bgImage.Clone());
Graphics g = System.Drawing.Graphics.FromImage(dstImage);
RectangleF validRect = validRegion.GetBounds(g);
RectangleF fgRect = fgRegion.GetBounds(g);
validRegion.Translate(-fgRect.X, -fgRect.Y);
Bitmap foreground = rc.Hold((Bitmap)fgImage.Clone());
validRegion.Translate(fgRect.X, fgRect.Y);
Bitmap validImage = null;
switch (algebraMethod)
{
case AlgebraMethod.Add:
validImage = Add(background, foreground);
break;
case AlgebraMethod.Subtract:
validImage = Subtract(background, foreground);
break;
case AlgebraMethod.Multiply:
validImage = Multiply(background, foreground);
break;
case AlgebraMethod.Divide:
validImage = Divide(background, foreground);
break;
case AlgebraMethod.Average:
validImage = Average(background, foreground);
break;
case AlgebraMethod.Differ:
validImage = Differ(background, foreground);
break;
case AlgebraMethod.Maximize:
validImage = Maximize(background, foreground);
break;
case AlgebraMethod.Minimum:
validImage = Minimum(background, foreground);
break;
}
g.DrawImage(validImage, validRect,
new Rectangle(0, 0, (int)validRect.Width, (int)validRect.Height), GraphicsUnit.Pixel);
bgImage.Dispose();
fgImage.Dispose();
return(dstImage);
} // end of AlgebraOperate
