How Does the Resizer Handle Focal Point
A focal point is an (x,y) coordinate that represents the spot on the image the automatic Image Resizer uses as a center point to resize the image around. The focal point is set in Composer or Photo Center using the focal-point feature.
Note
You define in your blocks which focal point to pull from, either Composer or Photo Center. Therefore, be sure you know which application your blocks use when you're setting the focal point.
When you identify the point, there are multiple ways to build the resizer URL so that the correct image appears.
The Image Resizer supports a number of different ways to crop an image:
Automatic to specific dimensions, centered
“Smart” by recognizing facial features
On a specific focal point (an x,y coordinate)
When you identify and return the point as part of the photo record, the blocks can use that focal point (x,y) location and the desired size of the image to calculate the rectangle.
Let's view an example:
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This image is 6923 pixels wide and 3577 pixels high. Let’s say we want a square 300x300 close-up of the temple, and the focal point is identified by the user as 3154x1881.
Then the instructions to the resizer are as follows:
https://arcmarketing-arcmarketing-sandbox.web.arc-cdn.net/resizer/v2/D5PFZU575ZCPROTAOS7BLRCWHI.jpeg?auth=fd7a2d20d16e86f65b659656c99d65aea9ff9ada77a5c3faf68fe088a6700974&width=300&height=300&focal=3154,1881