localmax.m

Harris角点提取实现了对棋盘格模板角点的精确提取

%Written by Hailin Jin and Paolo Favaro

%Copyright (c) Washington University, 2001

%All rights reserved

%Last updated 10/18/2001

function  [maxima] = LocalMax(image)

%

% LOCALMAX	Finds local maxima of image

%

%	[maxima,i,j] = LocalMax(image)

%

%	outputs array maxima of zeros and ones with ones

%	at maxima position (Extended to 9 points by JYB)



[m,n] = size(image);

center_cols = [1:n];

center_rows = [1:m];

left = [2:n n];

right = [1 1:n-1];

top = [2:m m];

bot = [1 1:m-1];

maxima = ( ( (image(center_rows,center_cols) > image(center_rows,left)) & ...
(image(center_rows,center_cols) > image(center_rows,right)) & ... 
(image(center_rows,center_cols) > image(top,center_cols)) & ...
(image(center_rows,center_cols) > image(bot,center_cols)) & ...
(image(center_rows,center_cols) > image(top,left)) & ...
(image(center_rows,center_cols) > image(top,right)) & ...
(image(center_rows,center_cols) > image(bot,left)) & ...
(image(center_rows,center_cols) > image(bot,right))));