I am trying to convert a .mat file into a bitmap image in Matlab but I cannot seem to find a way to do it. This is my current code:
human_seg = load(human_img);
where the human_img is a .mat file. I need to then convert the human_seg into a bmp but when I try it I recieve the error
Conversion to logical from struct is not possible.
Try this instead
imwrite(human_seg,'Imagefile1.bmp')
Related
I have a dataset whose images extension are in .mat. I found a solution in Matlab to solve this issue
Here is an example MATLAB code to convert a .mat file to an image format:
% Load the .mat file
load('example.mat');
% Convert the data to uint8
I = reshape(uint16(linspace(0,65535,25)),[5 5])
example_matrix = im2uint8(I);
% Try to save the image
try
imwrite(example_matrix, 'example.png');
disp('Image saved successfully');
catch
disp('Error saving image');
end
Note that you should replace "example.mat" and "example_matrix" with the actual names of your .mat file and matrix data, respectively. You can also change the format of the output image by changing the file extension in the imwrite function (e.g., 'example.jpg' or 'example.bmp').
I am working on compressing an image using compressive sensing.
I downloaded the code. I ran the demo_firstTry.m, demo_GAPTV.m and demo_read_CSfile_and_Reconstruct.m functions, they worked well.
The problem is that I need the compressed vector, it is saved as .cs file in the path written on the function,
I don't know how to open this file to get the compressed image vector ?
You can use MATLAB's inbuilt function cv.imread as below:
img = cv.imread(filename)
img = cv.imread(filename, 'OptionName',optionValue, ...)
This should solve the query.
I have to convert 'Yale' dataset whose format is .pgm to .mat file, I searched about this issue but couldn't find anything.
I appreciate any help.
Images can be saved in .mat format by using the save() function offered by MATLAB.
Let us suppose the name of your image is xyz.pgm that has to be saved as xyz.mat. Following steps should do so :
im = imread('xyz.pgm')
save('xyz.mat','im')
You can look into save() function to learn more about it.
Instead if you just want to convert it into other image formats, you should look up imwrite().
I generated and saved large number of data files using Octave, and now I need to open them in MATLAB as part of analyzing them. MATLAB spits out this error.
Error using load
Unable to read MAT-file
[file path]/PhPar_40.mat: not a binary MAT-file.
Try LOAD -ASCII to read as text.
Trying its suggestion of load -ASCII then gives this error.
Error using load
Number of columns on line 2 of ASCII file
[filepath]/PhPar_40.mat must be the same as previous lines.
I (now) understand that Octave is capable of saving in a MATLAB readable format, but re-creating these data files would take an inordinate amount of time and really isn't an option. Is there a way to get MATLAB to read these files?
MATLAB can't open these files because these are not saved by octave properly. Try saving them in octave by following command:
save -mat7-binary '[filepath]/PhPar_40.mat' 'm'
If you have large number of files, you can place all files in folder and then run an iterator to read all load and save in correct format automatically. This iterator will look like:
file = dir('[filepath_read]/*.mat');
index = 1;
while (index==length(file)+1)
m = load('file(index).name')
save -mat7-binary strcat("[filepath_write]/", file(index).name, ".mat") 'm';
index = index+1;
pause(1);
endwhile
Once you have all the files converted to right format, load them in MATLAB. I hope it will solve your problem
I want to import a .raw file into MATLAB as a matrix (frames x spatial x spectral). Is there a built-in function to do this?
If you're referring to a raw image file from a camera, I would check out the submission RAW Camera File Reader from Bryan White on the MathWorks File Exchange.
You can also read the file directly. But you'll need to convert it to DNG first. See this:
http://blogs.mathworks.com/steve/2011/03/08/tips-for-reading-a-camera-raw-file-into-matlab/