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How to resolve the error : Subscribed assignment dimension mismatch

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harpreet kaur
harpreet kaur 2015-6-22
回答： Walter Roberson 2015-6-22
I am trying to run a code of DWT of an image. The code is given below:
tic
clc
[File_Name, Path_Name] = uigetfile('*.jpg;*.bmp;*.gif;*.png', 'Pick an Image File');
I = imread([Path_Name,File_Name]);
input_image=imnoise(I,'speckle',.01);
figure;
imshow(input_image);
%I=imread('Forged.jpg');
%Red Component of Colour Image
Red_Input_Image=I(:,:,1);
%Green Component of Colour Image
Green_Input_Image=I(:,:,2);
%Blue Component of Colour Image
Blue_Input_Image=I(:,:,3);
%Apply Two Dimensional Discrete Wavelet Transform
[LLr,LHr,HLr,HHr]=dwt2(Red_Input_Image,'haar');
[LLg,LHg,HLg,HHg]=dwt2(Green_Input_Image,'haar');
[LLb,LHb,HLb,HHb]=dwt2(Blue_Input_Image,'haar');
%First_Level_Decomposition(:,:,1)=repmat([LLr,LHr;HLr,HHr]);
First_Level_Decomposition(:,:,1)=[LLr,LHr;HLr,HHr];
First_Level_Decomposition(:,:,2)=[LLg,LHg;HLg,HHg];
First_Level_Decomposition(:,:,3)=[LLb,LHb;HLb,HHb];
First_Level_Decomposition=uint8(First_Level_Decomposition);
%Display Image
figure,subplot(1,2,1);imshow(I);title('Originalimage');
subplot(1,2,2);imshow(First_Level_Decomposition);title('Decomposition');
toc;
The above code runs for some images, while gives the following error on other images.:
Subscribed assignment dimension mismatch.
Error in DWT (line 24)
First_Level_Decomposition(:,:,1)=[LLr,LHr;HLr,HHr];
One image is also attached on which it gave this error. Please suggest the solution

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回答（1 个）

Walter Roberson
Walter Roberson 2015-6-22
You do not resize the images to a common size, so your code would fail if your images are not all exactly the same size.

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