Convert matrix number into png image
16 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Hello i'm new on package "Image Processing Toolbox". I have a matrix of number ( http://dl.dropbox.com/u/59868217/matlab.mat) obtained by this script ( http://dl.dropbox.com/u/59868217/show_im_GR.m) I would be able to convert an image to grayscale or black and white. Possibly in png format.
How can I do ?
0 Kommentare
Akzeptierte Antwort
Image Analyst
am 15 Apr. 2012
I looked at your m-file. You get your data like this:
A = fread(fid,size,'*uint16');
img = reshape(A,width,height); %ok-->poi trasponi
Did you know you can get the 2D matrix directly like this:
img = fread(fid, [width, height], '*uint16');
% It will be a 2D array after this.
No reshaping will be necessary. Anyway, to get it into PNG format you have to save it out to disk as a PNG format image file because when it's in MATLAB it's simply an array of numbers and format doesn't really apply.
baseFileName = 'My matrix.png';
fullFileName = fullfile(folderName, baseFileName);
imwrite(img, fullFileName);
0 Kommentare
Weitere Antworten (1)
Geppo Batt
am 15 Apr. 2012
5 Kommentare
Image Analyst
am 17 Apr. 2012
I just called them to see if you had integer or floating point values and if they were in the range 0-255, 0-1, or something else. which might cause me to call mat2gray() or uint8().
Siehe auch
Kategorien
Mehr zu Image Processing and Computer Vision finden Sie in Help Center und File Exchange
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!