sum(Array)表示索引超出矩阵尺寸 [英] sum(Array) says index exceeds matrix dimensions

问题描述

我是Matlab的新手，我正在尝试进行一些图像匹配，图像X较大，图像Y较小，我们的目标是找到y与x的所有可能重叠，然后计算每个这样的RGB的平方差之和重叠(即x ^ 2 + y ^ 2 + z ^ 2).因此，我在较大的图像中找到了一个位置(i，j)，我们从中选择一个图块并进行匹配. 确切地说，这里是代码:-

I am a newbie to Matlab .I was trying to do some image matching.Image X is bigger and Image Y is smaller.Our aim is to find all possible overlaps of y with x and then compute sum of square differences for RGB at each such overlap(ie x^2+y^2+z^2).So I find a location (i,j) in bigger image from where we pick a tile and match . To be precise here is the code :-

a=size(X,1)-size(Y,1);
b=size(X,2)-size(Y,2);
Z=ones(a,b);

for i=1:a
for j=1:b 
    A=[X(i:i+size(Y,1)-1,j:j+size(Y,2)-1,1)-Y(1:end,1:end,1)].^2;
    B=[X(i:i+size(Y,1)-1,j:j+size(Y,2)-1,2)-Y(1:end,1:end,2)].^2;
    C=[X(i:i+size(Y,1)-1,j:j+size(Y,2)-1,3)-Y(1:end,1:end,3)].^2;           
    T=A+B+C
    size(T)
    P=sum(sum(T))
    %Z(i,j)=sum(sum(T));
end;    
end;    

现在的问题是，行sum(sum(T))抛出一个错误-索引超出矩阵维数".有人可以帮忙吗?我的目的是将所有这些差值相加并将其放在矩阵Z中.

Now the problem is the line sum(sum(T)) throws up an error-'Index exceeds Matrix Dimensions'.Can someone help?My aim is to add all these differences and put it in a matrix Z.

推荐答案

获取此类错误的唯一方法是在某处声明了变量sum.

The only way you can get such a bug is if you have declared a variable sum somewhere.

运行clear sum(或clear all，或重新启动Matlab)，然后重试，然后一切正常.

Run clear sum (or clear all, or restart Matlab) and try again, then everything should work fine.

这篇关于sum(Array)表示索引超出矩阵尺寸的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！