Image EditingLesson 200Free preview

Rotate Image

This lesson is part of Web Developer Tools · All levels

Summary

Rotate the image at a certain angle, for example 90, 180, or free angle to balance the horizon. The rotation of the elbow-angle can be done without pixel interpolation, whereas any angle requires resampling and larger canvases. Also, look at the orientation metadata so that the results don't spin twice.

Key points

A 90-degree rotation exchanges the position of width and height
Any angle requires interpolation that can slightly soften the detail
The resulting canvas needs to be expanded so that the angle of the image does not cut.
The EXIF orientation metadata can make a different view from the original pixel
Always keep a copy before you rotate permanently.

Full lesson

Code examples and quizzes

Full lessons, code examples, and quizzes are available to subscribers. 5 questions.