Focal

Usage: focal(<left>x<top>:<right>x<bottom>)

Description

This filter adds a focal point, which is used in later transforms.

Arguments

  • left, top, right, bottom: All mandatory arguments in the <left>x<top>:<right>x<bottom> format.

Example

Before cropping with specific focal point:

Original picture 
http://localhost:8888/unsafe/400x100/filters:focal(146x206:279x360)/https%3A%2F%2Fgithub.com%2Fthumbor%2Fthumbor%2Fraw%2Fmaster%2Fexample.jpg

After specifying the focal point:

Picture after the RGB filter

Warning

When using this filter together with detectors, extract focal points filter or metadata parameter, unexpected behavior may occur.