function hsvMean = selectPixelsAndGetHSV(RGB, Area)
%
% function hsvMean = selectPixelsAndGetHSV(RGB, Area)
%
% Use this function in order to select multiple points from an image (use
% right click to stop process). The selected points are used to calculate
% the average HSV values.
% ARGUMENTS:
% RGB: the RGB image
% Area: the area size used to calulate the HSV values of each point
%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Theodoros Giannakopoulos - January 2008
% www.di.uoa.gr/~tyiannak
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
clf;
warning off;
imshow(RGB); hold on;
HSV = rgb2hsv(RGB);
HSV2 = HSV;
numOfSelectedPixels = 0;
right_not_pressed = 1;
BUTTON = 1;
while (BUTTON~=3)
numOfSelectedPixels = numOfSelectedPixels + 1;
[X,Y,BUTTON] = GINPUT(1);
hsvTemp2 = HSV(Y-(Area-1)/2:Y+(Area-1)/2, X-(Area-1)/2:X+(Area-1)/2,
:);
HSV2(Y-round((Area-1)/2):Y+round((Area-1)/2), X-round((Area-
1)/2):X+round((Area-1)/2), :) = 0;
hsvTemp = zeros(3,1);
[K,L,M] = size(hsvTemp2);
for (i=1:K)
for (j=1:L)
hsvTemp(1) = hsvTemp(1) + hsvTemp2(i,j,1);
hsvTemp(2) = hsvTemp(2) + hsvTemp2(i,j,2);
hsvTemp(3) = hsvTemp(3) + hsvTemp2(i,j,3);
end
end
hsvTemp = hsvTemp / (K*L);
hsv(numOfSelectedPixels,:) = hsvTemp;
hsvMean = median(hsv,1);
line([X-(Area-1)/2 X+(Area-1)/2] , [Y-(Area-1)/2 Y-(Area-1)/2]);
line([X+(Area-1)/2 X+(Area-1)/2] , [Y-(Area-1)/2 Y+(Area-1)/2]);
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