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Hello, I want to get pixel values from the image interactively.... I have tried to use pixval(fig,option) but I cant get its output to some other variables/parameters... for instance, I tried ..... I =imread('C:\myimage.gif') [x,y, d] =pixval(I, 'on'), where my aim is to get X , Y values and d(=Euclidean distance), while moving my cursor on the image. what is wrong with my approach? can anyone suggest the best way to get these values into other variables and not just to have have them displayed on the image? Any word of help is appreciated. Thanks, Justice |
getting output
Started by ●February 4, 2005
Reply by ●February 4, 20052005-02-04
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Hi, The function bellow is a partial solution. There is 2 disadvantages: 1) The values are updated only when you press a mouse button. 2) The distance is not displayed or given in the output (this is easy to correct by adding a simple calculation to the function). *code* function C=pixvalout(A,B) % To stop press CTRL persistent h C=''; if nargin == 0 pixval elseif nargin==1 pixval(A) else pixval(A,B) end while 1 waitforbuttonpress if isempty(h) h=findobj(allchild(gcf),'tag','pixel value display bar'); end if ishandle(h) & double(get(gcf,'CurrentCharacter'))~=2 C=strvcat(C,get(h,'String')); else break end end *code end* Joe Sababa BSTeX - Equation viewer for Matlab http://www.geocities.com/bstex2001/ --- Justice <> wrote: > > Hello, > > I want to get pixel values from the image > interactively.... I have tried to use > pixval(fig,option) but I cant get its output to some > other variables/parameters... > > for instance, I tried ..... > > I =imread('C:\myimage.gif') > [x,y, d] =pixval(I, 'on'), > where my aim is to get X , Y values and > d(=Euclidean distance), while moving my cursor on > the image. > > what is wrong with my approach? can anyone suggest > the best way to get these values into other > variables and not just to have have them displayed > on the image? > > Any word of help is appreciated. > > Thanks, > Justice __________________________________ |
