How to convert image into matrix

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Suyash bhardwaj
Suyash bhardwaj 2012-4-27
评论： DGM 2024-4-23
Dear readers, i am new to matlab and want to learn how to convert or represent a picture in bmp or jpeg format in matrix form so that manipulations can be carried out on it. your suggestions will be worth for me..
suyash bhardwaj

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回答（5 个）

Andreas Goser
Andreas Goser 2012-4-27
If you import a picture, it is actually a matrix, so I am not sure what do are looking for. Try:
imdata = imread('ngc6543a.jpg');
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Soma Debnath
Soma Debnath 2016-8-25
I am very new to MATLAB,so i have no idea that how to create and load training dataset of images in matlab?please write the corresponding code also.
snehal jaipurkar
snehal jaipurkar 2016-10-24
Dis is really helpful. I thanks experts for their support to beginners like usus.

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Omar Omari
Omar Omari 2019-1-31
hi readers
How can I take a picture from a camera my labtop and draw it into matrices and vice versa
Thanks
keerthana reddy
keerthana reddy 2019-2-14
编辑：DGM 2024-4-23
Ran in:
x=dicomread('i2.jpg');
Warning: Suspicious fragmentary file, might not be DICOM.
Warning: Not enough data imported. Attempted to read 1179258880 bytes at position 8. Only read 4733.
imshow(i2);
Unrecognized function or variable 'i2'.
  2 个评论
Walter Roberson
Walter Roberson 2021-12-9
dicomread() is only for use with files stored in dicom format. There is no official file extension for dicom files but most people use .dcm or .dicom as the extension. In theory a file named with .jpg could be in dicom format instead of jpeg format, but the attached file is jpeg format not dicom format.
DGM
DGM 2024-4-23
Ran in:
As Walter said, the file is a JPG, not a DICOM file. Surprisingly, dicomread() only returns a warning and an empty array.
x = dicomread('i2.jpg');
Warning: Suspicious fragmentary file, might not be DICOM.
Warning: Not enough data imported. Attempted to read 1179258880 bytes at position 8. Only read 4733.
whos x
Name Size Bytes Class Attributes x 0x0 0 double
What's been missed is that x is never actually used. When imshow() is called, it's given the filename prefix as if it's a variable, even though it is neither a variable, nor a valid filename. Obviously, the result is going to be an error.
You can read pedestrian images with imread(). You can pass either a variable or a filename to imshow().
inpict = imread('i2.jpg');
imshow(inpict)

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uroog fatima
uroog fatima 2021-12-9
i need a command to convert encrpted image to matrix.can anybody tell me.
  1 个评论
Walter Roberson
Walter Roberson 2021-12-9
No, we cannot help you with that. Due to the laws of the United States, we are not permitted to discuss encryption or decryption algorithms (except under narrow circumstances that are a nuisance to go through, requiring obtaining permission in advance from a government department.)

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samitha chathuranga
How to Design a communication system that uses digital modulation and channel coding with an LDPC code to simulate the transmission of digital images over an additive white Gaussian noise (AWGN) channel.
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DGM
DGM 2024-4-23
This is not an answer, so it doesn't belong here as an answer.
If you want to ask a question, please post a new question using the "Ask" button at the top of the page.

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