Texture -- 2nd order texture

Texture -- 2nd order texture

by Yiyuan Fang -
Number of replies: 1



Hello, 

I don't understand how you get H from I. In the lecture, professor said that "4 represents that there are four zeros whose neighbor is zero", which isn not true because there are at least 7 zeros whose neighbor is zero. The 1 means that there are zeros whose neighbor is 2, which is also not correct, because there are at least two of those.

Am I missing something? Would really appreciate if someone explains how this works. Thanks! 

In reply to Yiyuan Fang

Re: Texture -- 2nd order texture

by Qiyuan Dong -
Hi Yiyuan,

You probably missed "1, 0" in P(l, m, 1, 0), which requires distance being 1 and direction being 0 (theta=0 is actually the direction to the right). I think H also assumes d=1 and theta=0. For example, in the matrix there are four 0-value pixels with a 0-value neighbor on its right, so H(0,0) is 4.

Hope this help!