ImageWorker: allow specification of subsampling factors for statistical operations

Description

Right now statistical operations use all the available pixels, allow users to specify a subsampling factor (xPeriod, yPeriod) instead. The default is still going to be "1", that is, all pixels.

Environment

None

Assignee

Andrea Aime

Reporter

Andrea Aime

Triage

None

Components

Fix versions

Priority

Medium
Configure