MATLAB Answers

How to save Histogram of Multiple Images

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Diah Junaidi
Diah Junaidi on 31 Jul 2019
Commented: KALYAN ACHARJYA on 31 Jul 2019
I used this code but the results is unsatisfied :( please help me :(
% Specify the folder where the files live.
myFolder = 'D:\DIAH\[MATLAB]cv1-fingerspelling-recognition-master\cv1-fingerspelling-recognition-master\imagesss';
% Check to make sure that folder actually exists. Warn user if it doesn't.
% if ~isfolder(myFolder)
% errorMessage = sprintf('Error: The following folder does not exist:\n%s', myFolder);
% uiwait(warndlg(errorMessage));
% return;
% end
% Get a list of all files in the folder with the desired file name pattern.
filePattern = fullfile(myFolder, '*.JPG'); % Change to whatever pattern you need.
theFiles = dir(filePattern);
for k = 1 : length(theFiles)
baseFileName = theFiles(k).name;
fullFileName = fullfile(myFolder, baseFileName);
methodFile = imread(fullFileName);
grayscale = rgb2gray(methodFile);
histogram = imhist(grayscale);%using this for histogram
currentImageArray = histogram;
currentImage{k}=currentImageArray;
for i = 1 : 1
outputFolder = 'D:\DIAH\[MATLAB]cv1-fingerspelling-recognition-master\cv1-fingerspelling-recognition-master\Hasil Histogram Dataset\1';
outputFileName = fullfile(outputFolder, sprintf('Hasil Citra Ground Truth_%d_%d.jpg', k, i));
imwrite(currentImage{k}, outputFileName);
end
end
here the results:
Hasil Citra Ground Truth_1_1.jpg
  1 Comment
KALYAN ACHARJYA
KALYAN ACHARJYA on 31 Jul 2019
"results is unsatisfied' means?
You want to save histogram plots ??

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Answers (1)

KALYAN ACHARJYA
KALYAN ACHARJYA on 31 Jul 2019
Edited: KALYAN ACHARJYA on 31 Jul 2019
Images=dir('D:\DIAH\[MATLAB]cv1-fingerspelling-recognition-master\cv1-fingerspelling-recognition-master\imagesss*.jpg'); %Database Image folder
%......................[] ^ IS this OK?
outDirectory='D:\DIAH\[MATLAB]cv1-fingerspelling-recognition-master\cv1-fingerspelling-recognition-master\Hasil Histogram Dataset\hist_data\'; % To save histograms
%......................^ set valid path "hist_data" folder will create by Matlab itself
mkdir(outDirectory);
for i=1:length(Images)
ImgName=strcat('D:\DIAH\[MATLAB]cv1-fingerspelling-recognition-master\cv1-fingerspelling-recognition-master\imagesss\',Images(i).name);
RGBImage=imread(ImgName);
grayImage=rgb2gray(RGBImage);
imhist(grayImage);
imwrite(gcf,strcat(outDirectory,Images(i).name));
end
  5 Comments
KALYAN ACHARJYA
KALYAN ACHARJYA on 31 Jul 2019
why should we use .jpg if we wanna perform all images at once from the database folder?
Its depneds on the image format you have (jpg,png etc). Here one by one image call is done, get the histogram and save it.
Next go for next image..!

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