How to convert single column RGB matrix to image

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Mahesh Gunturu
Mahesh Gunturu am 18 Aug. 2018
Kommentiert: Image Analyst am 24 Jan. 2019
I have a matrix of RGB values as shown below, and entire .txt file is also attached
pixels = [129 108 61;
117 96 51;
102 77 36;
94 64 26;
97 59 22; ]
I want to convert this into an image, and I tried like below but it gives 90 degrees rotated image:
new_img = uint8(pixels);
new_img = reshape(new_img, 407, 516, 3);
I have tried like below based on the one of the answer
pixels = load("hw4-image.txt");
new_img = uint8(pixels);
new_img = reshape(new_img, 407, 516, 3);
new_img = permute(new_img(end:-1:1,:,:),[2 1 3]);
image(new_img);
expected image is:
But I got

Akzeptierte Antwort

Rik
Rik am 18 Aug. 2018
Bearbeitet: Rik am 18 Aug. 2018
If your code works, but you need a 90 degree rotation (clockwise), you can use the anonymous function below:
rot90CW=@(IM) permute(IM(end:-1:1,:,:),[2 1 3]);
pixels = load("hw4-image.txt");
new_img = uint8(pixels);
new_img = reshape(new_img, 407, 516, 3);
new_img = rot90CW(new_img);
new_img = fliplr(new_img);
image(new_img);
daspect([1 1 1])
  4 Kommentare
Mahesh Gunturu
Mahesh Gunturu am 18 Aug. 2018
Thanks a lot, I used
daspect([1 1 1])
and it worked, however still the image I got is in opposite direction of original image any idea?
Rik
Rik am 18 Aug. 2018
The fliplr function is base Matlab, so you can use that:
pixels = load("hw4-image.txt");
new_img = uint8(pixels);
new_img = reshape(new_img, 407, 516, 3);
new_img = permute(new_img(end:-1:1,:,:),[2 1 3]);
new_img = fliplr(new_img);
image(new_img);

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Weitere Antworten (1)

Image Analyst
Image Analyst am 18 Aug. 2018
Try
axis('on', 'image');
  5 Kommentare
Rik
Rik am 22 Jan. 2019
Have a read here (or here for more general advice). It will greatly improve your chances of getting an answer.
Image Analyst
Image Analyst am 24 Jan. 2019
Go ahead and ask it in a new question after you read the links that Rik gave you.
Or you can ask the face recognition guy at the Mathworks: Brett Shoelson, and his face recognition app

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