MATLAB Answers

Image rotation and transformation

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Vivek Vora
Vivek Vora on 27 May 2020
Answered: Image Analyst on 27 May 2020
Hello experts,
as a beginner in Matlab, i have some problems with the rotation of image from the center point.
Problem defination:
I took the image at 30° from the left side of the picture. Now i want to rotate the image from the center point for -30° in the right direction to achive the proper (flat) image for the analysis.
How can i solve this problem?
Is there any tutorial or scripts or manual for these types of problems?
Thank you in advance.
Best regards
Vivek

  2 Comments

John Marriott
John Marriott on 27 May 2020
Hi Vivek,
If I have understood correctely and you want to rotate 30 degress counterclockwise you can use the imrotate function e.g newimage = imrotate(oldimage, 30)
Vivek Vora
Vivek Vora on 27 May 2020
Hi John,
thank you for your quick answer.
Actually, i want to tilt my image 30° up from left side, that means vertical rotation. Since my image is 2D, and i want to rotate it in a 3D space, i think my transformation is not a rotation but it should be projection.

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Answers (1)

Image Analyst
Image Analyst on 27 May 2020
You can apply your own custom rotation matrix by using https://en.wikipedia.org/wiki/Rotation_matrix
Or call imtranslate() to shift the rotation point to the center of the image, then call imrotate(), then imtranslate() again to shift it back to where it was.

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