sub2ind在opencv中的等效功能 [英] equivalent function of sub2ind in opencv

问题描述

我在理解和将matlab代码转换为opencv时遇到了问题.我想知道sub2ind的等效功能是否与opencv中的matlab相同.或如何在opencv中实现此特定功能.

Iam facing problem in understanding and converting a matlab code into opencv. I want to know is there any equivalent function of sub2ind as in matlab in opencv. Or how to implement in opencv this particular function.

sub2ind函数的链接是

link for sub2ind function is

http://www.mathworks.in/help/techdoc/ref/sub2ind.html

推荐答案

一个简单的例子来说明.考虑:

A quick example to illustrate. Consider:

>> v = (1:4*3)
v =
     1     2     3     4     5     6     7     8     9    10    11    12
>> M = reshape(v,[4 3])
M =
     1     5     9
     2     6    10
     3     7    11
     4     8    12

现在以下所有内容都是等效的:

Now all the following are equivalent:

sz = size(M);

i = 3; j = 2;
M(i,j)
v( sub2ind(sz,i,j) )
v( sz(1)*(j-1)+i )

请记住，MATLAB使用列主序，而C是行主序.

Just keep in mind that MATLAB uses a column-major order, while C is row-major order

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