Cropping an Image with draggable rectangle

Crops the Image from a draggable rectangle & displays it (after the figure is closed)

Description

% Crops the Image from a draggable rectangle
% & returns the Cropped Image and its co-ordinates
%
% I is the Image to be cropped assumed to be in the
% matlab workspace
%
% w : width (default value : cols/2)
% h : height (default value : rows/2)
%
% EXAMPLES
%
% I = imread('circuit.tif');
% [O] = Crop_it(I);
%
% [O I_crop]=Crop_it(I,0);
%
% [O I_crop]=Crop_it(I,1,100,100);

• Acknowledgements: This submission has inspired the following:; Cropping an Image with resizable and draggable rectangle
• Required Products: Image Processing Toolbox
• MATLAB release: MATLAB 7.2 (R2006a)

[someone someone]

This submission requires the Image Processing Toolbox

[Shripad Kondra]

replace the line
% h = imrect(gca, [1 1 h w]); with
h = impositionrect(gca, [1 1 h w]);

if you don't have imrect function for older matlab version.

[Shripad Kondra]

Here is a more smaller code which returns the cropped Image and its coordinates

function [O I_crop] = Crop_it(I,w,h)
% Crops the Image from a fixed draggable rectangle
% & returns the Cropped Image and its co-ordinates
%
% I is the Image to be cropped assumed to be in the
% matlab workspace
%
% h : width (default value : cols/2)
% w : height (default value : rows/2)
%
% EXAMPLES
%
% I = imread('circuit.tif');
% Crop_it(I);
%
% I = imread('circuit.tif');
% [O I_crop]=Crop_it(I,100,100);

% $date 08-Nov-2007

if nargin~=3
    [r c unused] = size(I);
    w=round(r/2);
    h=round(c/2);
end

figure, imshow(I);
% h = imrect(gca, [1 1 h w]);
h = impositionrect(gca, [1 1 h w]); % for older version of IP toolbox
api = iptgetapi(h);
waitfor(h);
I_crop = imcrop(I,floor(api.getPosition())-1);
O = api.getPosition();
% figure, imshow(I_crop); %uncomment to plot

[Erion H]

Can you add a feature to change the size of the rectange on the figure rather than having it fixed?

[hima]

heyy i have executed this code bit im geting errors at 'imrect' and so i have tried with 'impositionrect' then also im geting error undefined function.in the same way the function 'iptgetapi'...please help me