why can not read images with structures from my folder with different resolution ??

I am reading some images from my folder. I am using structures but If I read from my folder first image all is ok and the FOR statement is ended due to is error message matlab shows:

??? Index exceeds matrix dimensions.

Error in ==> select_part_img at 26
    images_part=images_set(1,i); img=imread(images_part.name);

What is problem ? How can I solve this problem ? In my folder are images with different resolution.

Answer 1

[Walter Roberson]

Your line

[img_num,no_used]=size(images_set);

is probably incorrect. images_set will be a structure array vector: one of its two dimensions is going to be 1, probably its second dimension, leading to no_used being 1

When "i" is 2, your line

images_part=images_set(1,i);

is going to be incorrect: it is the first dimension that increases. You need

images_part=images_set(i,1);

Better yet, ignore rows vs columns by using

img_num = length(images_set);

and

images_part=images_set(i);

[Miroslav]

thank you very much. At this moment my code is working.

[Miroslav]

Could you help me one again ? I have similar problem with my code. Could you help me? I have this code:

function [image_DB,mask_DB_gray]=Pictogram_main(dataInput_folder)

% script for image description

% data_folder=dir(uigetdir('Choose the directory for image searching'));

%%

path(path,dataInput_folder);

images_set=dir([dataInput_folder,'/*.jpg']);

masks_set=dir([dataInput_folder,'/*.bmp']);

%%

[img_num,no_used]=size(images_set);

% image descriptions

%%

for i=1:img_num

image_part=images_set(i,1); image_DB=imread((image_part.name));

mask_part=masks_set(i,1); mask_DB_gray=rgb2gray(imread(mask_part.name));

segment_value=find((imhist(mask_DB_gray))>0)-1;

[segment_num,no_used]=size(segment_value);

subplot(1,3,1); imshow(image_DB)

%%

for j=1:segment_num

mask_segment=uint8(mask_DB_gray==segment_value(j));

mask_segment_RGB(:,:,1)=mask_segment;

mask_segment_RGB(:,:,2)=mask_segment;

mask_segment_RGB(:,:,3)=mask_segment;

image_segment=image_DB.*mask_segment_RGB;

subplot(1,3,2); imshow(mask_segment, [0 1])

subplot(1,3,3); imshow(image_segment)

pause

end

end

If I read the first image all is OK and after that the program read second image but the matlab show this problems message:

??? Subscripted assignment dimension mismatch.

Error in ==> Pictogram_main at 46

mask_segment_RGB(:,:,1)=mask_segment;

What can I do with this please ?

[Miroslav]

Could you help me one again ? I have similar problem with my code. Could you help me? I have this code:

function [image_DB,mask_DB_gray]=Pictogram_main(dataInput_folder)

% script for image description

% data_folder=dir(uigetdir('Choose the directory for image searching'));

%%

path(path,dataInput_folder);

images_set=dir([dataInput_folder,'/*.jpg']);

masks_set=dir([dataInput_folder,'/*.bmp']);

%%

[img_num,no_used]=size(images_set);

% image descriptions

%%

for i=1:img_num

image_part=images_set(i,1); image_DB=imread((image_part.name));

mask_part=masks_set(i,1); mask_DB_gray=rgb2gray(imread(mask_part.name));

segment_value=find((imhist(mask_DB_gray))>0)-1;

[segment_num,no_used]=size(segment_value);

subplot(1,3,1); imshow(image_DB)

%%

for j=1:segment_num

mask_segment=uint8(mask_DB_gray==segment_value(j));

mask_segment_RGB(:,:,1)=mask_segment;

mask_segment_RGB(:,:,2)=mask_segment;

mask_segment_RGB(:,:,3)=mask_segment;

image_segment=image_DB.*mask_segment_RGB;

subplot(1,3,2); imshow(mask_segment, [0 1])

subplot(1,3,3); imshow(image_segment)

pause

end

end

If I read the first image all is OK and after that the program read second image but the matlab show this problems message:

??? Subscripted assignment dimension mismatch.

Error in ==> Pictogram_main at 46

mask_segment_RGB(:,:,1)=mask_segment;

What can I do with this ?

Answer 2

[Sean de Wolski]

dbstop if error

And inspect the variables at the line in question (line 26)

[Miroslav]

It is clear but why?? Look at my code:

function [im_part,img_gray,img]=select_part_img(dataInput_folder)

% Author: Fric

% Date: 17.01.2012

% data_folder=dir(uigetdir('Choose the directory for image searching'));

%http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

path(path,dataInput_folder);

images_set=dir([dataInput_folder,'/*.jpg']);

mask_set=dir([dataInput_folder,'/*.bmp']);

%resize images

% [img_num,no_used]=size(images_set);

% for i = 1:img_num

% im_set=images_set(i,:);

% imshow(reshape(im_set,300,300)');

% imresize(im_set,[300,300]);

% figure();

% end

[img_num,no_used]=size(images_set);

for i=1:img_num

images_part=images_set(1,i); img=imread(images_part.name);

mask_part=mask_set(i,1); img_gray=rgb2gray(imread(mask_part.name));

figure(1),subplot(2,2,1); imshow(img);

im_hist=find((imhist(img_gray))>0)-1;

[segment_num,no_used]=size(im_hist);

[r,c]=size(img_gray);

%

for j=1:segment_num

im_part = (img_gray == im_hist(j,1));

figure(1),subplot(2,2,1); imshow(img_gray)

figure(1),subplot(2,2,3); imshow(im_part)

pause

end

end