how to convert a cell array into an image?
9 views (last 30 days)
Show older comments
I fetched an image from sql database but its returning format is like i=[75839 int8] how can i convert it into image plz help me out
0 Comments
Accepted Answer
Guillaume
on 5 Oct 2014
If the bytes you get are truly a jpg image, you may be able to decode it with java:
jimage = javax.imageio.ImageIO.read(java.io.ByteArrayInputStream(d));
height = jimage.getHeight;
width = jimage.getWidth;
pixels = reshape(typecast(jimage.getData.getDataStorage, 'uint8'), [3,width,height]);
img = cat(3, ...
transpose(reshape(pixels(3,:,:), [width,height])), ...
transpose(reshape(pixels(2,:,:), [width,height])), ...
transpose(reshape(pixels(1,:,:), [width,height])));
12 Comments
More Answers (1)
Image Analyst
on 4 Oct 2014
Edited: Image Analyst
on 4 Oct 2014
You need to take the (badly-named) i and reshape it into a 2 or 3D array, but you need to know the number of rows and columns.
cellContents = cell2mat(i); % Convert from cell to double.
grayImage = reshape(cellContents, [rows, columns]);
imshow(grayImage, []);
8 Comments
Guillaume
on 5 Oct 2014
Your image is a png image, not a jpeg. The code I posted in my answer, with the typecast fix, should decode it.
See Also
Categories
Find more on Convert Image Type in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!