i tryng to run a .m file but always shows a error undefined variable.... plz help

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Farjana Yeasmin
Farjana Yeasmin 2014-11-25
回答： Image Analyst 2014-11-25
errror : Undefined variable "cropping" or class "cropping.m".
The cropping.m file is : %===============================================================================
function[out,check] =cropping_fun(image, x_TopLeft, y_TopLeft, x_BottomRight, y_BottomRight)
check=0;
clc; close all;
% let us handle cases if the user inputs incorrect or insufficient inputs
if nargin>0 if (ischar(image))&&(exist(image, 'file')==2)
A=double(imread(image));
elseif exist('image', 'var')
A=double(image);
end
size_A=size(A);
end
if nargin==0 A=double(imread('D:\\Thesis Code\\Source Code\\StegoImage.png'));
size_A=size(A);
x_TopLeft=ceil(size_A(1)/4);
y_TopLeft=ceil(size_A(2)/4);
x_BottomRight=floor(3*size_A(1)/4);
y_BottomRight=floor(3*size_A(2)/4);
elseif nargin==1
x_TopLeft=ceil(size_A(1)/4);
y_TopLeft=ceil(size_A(2)/4);
x_BottomRight=floor(3*size_A(1)/4);
y_BottomRight=floor(3*size_A(2)/4);
elseif nargin==2
y_TopLeft=ceil(size_A(2)/4);
x_BottomRight=floor(3*size_A(1)/4);
y_BottomRight=floor(3*size_A(2)/4);
elseif nargin==3
x_BottomRight=floor(3*size_A(1)/4);
y_BottomRight=floor(3*size_A(2)/4);
elseif nargin==4
y_BottomRight=floor(3*size_A(2)/4);
end
%==========================================================================
% size of the cropped image
M=x_BottomRight-x_TopLeft+1; N=y_BottomRight-y_TopLeft+1;
%==========================================================================
% Memory allocation for the output image for faster implementation of the % code
image_dim=size(size_A);
if image_dim(2)==3 P=3; B=zeros(M, N, P); else B=zeros(M, N); end
%==========================================================================
if ((M>0)&&(N>0))
for i=1:M
for j=1:N
B(i, j, :)=A(x_TopLeft+i, y_TopLeft+j, :);
end
end
new_imagesc(A);
title('Original image');
new_imagesc(B);
title('Cropped image');
else
error('Check the dimensions of the cropped image.');
end
end % End of the cropping_fun
%==========================================================================
function new_imagesc(A)
%==========================================================================
% Author: Prashant Athavale % Date 11/19/2011 % Please acknowledge my name if you use this code, thank you. % This is a function to display images at the center of the screen using % Matlab's imagesc function
%==========================================================================
figure; screen_size=get(0,'screensize'); screen_width=screen_size(3); screen_height=screen_size(4); figure_width=screen_size(4)/2; % width of the figure figure_height=screen_size(4)/2; % height of the figure x_lowerbottom=(screen_width-figure_width)/2; y_lowerbottom=(screen_height-figure_height)/2; set(gcf,'position',[x_lowerbottom y_lowerbottom figure_width figure_height]); image_dim=size(size(A));
% What to do if the image is color/RGB or grayscale
if image_dim(2)==3 M=max(max(max(A))); elseif image_dim(2)==2 M=max(max(A)); end
if M>1
M=1;
else
M=255;
end
% imagesc likes the images from 0 to 255 % if they are not then we make them so.
A=double(A); imagesc(uint8(A*M)); if image_dim(2)==3 colormap('colormap'); else colormap('gray'); end
end % end of function new_imagesc
%==========================================================================

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回答（1 个）

Image Analyst
Image Analyst 2014-11-25
Read this so you'll know how to format your code. Then rename your m-file so that it has the same name as your function, cropping_fun.m. See if that helps.

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