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25 lines
669 B
Matlab
25 lines
669 B
Matlab
function [I,xcent,ycent]=image_feature_add(gridsize,len,wid,spacing,angle,contrast,backgnd)
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%create a search array with odd target defined by additional element
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if nargin<6, contrast=[0.5,0.5]; end
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if nargin<7, backgnd=0.5; end
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bar=define_bar(len,wid);
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[I,gridsize,xlocations,ylocations]=define_blank_image(gridsize,len,spacing,backgnd);
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a=0;
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for x=xlocations
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a=a+1;
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b=0;
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for y=ylocations
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b=b+1;
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I=draw_bar(I,x,y,bar,angle,contrast(2),backgnd);
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if a==ceil(length(xlocations)/2) && b==ceil(length(ylocations)/2)
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I=draw_bar(I,x,y,bar,angle,contrast(1),backgnd);
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I=draw_bar(I,x,y,bar,angle-90,contrast(1),backgnd);
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xcent=x;
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ycent=y;
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end
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end
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end
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