图像算术

图像的加减乘除

图像算术指对图像执行标准算术运算，如加法、减法、乘法和除法。图像算术在图像处理中有许多用途，它既可作为更复杂运算的初步步骤，本身也是一项运算。例如，图像相减可用于检测同一场景或对象的两个或多个图像之间的差异。

函数

`imabsdiff`	两个图像的绝对差
`imadd`	将两个图像相加或在图像中添加常量
`imapplymatrix`	Linear combination of color channels
`imcomplement`	对图像求补码
`imdivide`	将一个图像除以另一个图像或用常量除以图像
`imlincomb`	Linear combination of images
`immultiply`	将两个图像相乘或者将图像乘以常量
`imsubtract`	从一个图像中减去另一个图像或从图像中减去常量

Image Arithmetic Functions
Image arithmetic is the implementation of standard arithmetic operations, such as addition, subtraction, multiplication, and division, on images.
Nest Calls to Image Arithmetic Functions
Learn how to maintain precision when performing a series of arithmetic operations in combination..
Image Arithmetic Clipping Rules
Learn how to deal with results of image arithmetic that exceed the range of the image data type.