How PhotoAnalysisKit Is Constructed

Thu, 30 Jul 2026 00:00:00 +0000

How PhotoAnalysisKit Is Constructed

PhotoAnalysisKit is the reusable measurement layer extracted from RawCull. It turns a decoded CGImage plus neutral capture metadata into sharpness, saliency, focus evidence, and an optional focus-mask image. It can also create opaque Apple Vision feature prints.

The package measures a photo; it does not decide whether to keep it. That distinction prevents image-processing code from becoming coupled to RawCull’s files, settings, views, caches, or culling policy.

Detailed Focus Mask Computation

Mon, 29 Jun 2026 00:00:00 +0000

Detailed Focus Mask Computation

This page explains, step by step, how RawCull computes the visible focus mask: where the work starts in the UI, which model and engine methods run, how the bitmap overlay is produced, what the intermediate values mean, and which factors can change the final result.

The short version: the focus mask is not a camera focus-point display. It is a computed overlay built from local edge energy. RawCull first finds useful regions to inspect, then computes a Laplacian edge-energy image, ranks local patches, thresholds the strongest evidence, colorizes it, clips it to the selected patch areas, and finally draws the result over the photo.

Focus-Mask on RawCull

How PhotoAnalysisKit Is Constructed

How PhotoAnalysisKit Is Constructed

Detailed Focus Mask Computation

Detailed Focus Mask Computation