Posts 🌳

This is where technical articles and notes are stored.

Mostly about colour science, with some code and other miscellaneous things.

Technology evolves with each passing day, knowledge renews without cease;

No single voice can offer perfect truth. Seek independently, and verify with care.

What Happens When You Get the Baseline Headroom Wrong

Baseline Headroom in ISO 21496-1: A Bug and Some Curious Findings

New Year, New Look: JacksBlog's First Anniversary

Fly me to the moon. Let me play among the stars. Let me see what spring is like on Jupiter and Mars.

Hisense’s Four-Primary TV: Colour Gamut and Visual Health

How the added cyan LED affects gamut coverage and its potential impact on human circadian rhythm

Bit Packing in DNG Images and Its Implementation

Understanding 10/12/14-bit image packing algorithms and solving Numpy slice alignment and padding issues

HDR Image Formats (V): Understanding Headroom in Gainmap

A seemingly redundant parameter: The role and correct writing method of Alternate HDR Headroom in the ISO 21496-1 standard

Assembling DNG To Get Day0 Support For New Cameras

Use LibRAW to break down RAW components, then manually piece together a usable DNG file with PiDNG.

A First Look at Mobile Phone Log: OPPO O-Log as an Example

Maybe it’s just a selling point mentioned at a launch event, but surely no one takes it seriously?

A New Python AVIF Encoding Option: ImageCodecs

ImageCodecs now supports colour space and transfer function parameters.

(Temp) CIC 33 Paper Demonstration

Visual Matching Experiment and Tone Mapping based on CAM16-UCS

Geekon Monitor Unboxing: High-end Aspiration, Workshop Reality

A bold attempt at a super-high-spec product from a mysterious little workshop, only to suspect I’ve bought a monitor that has passed through eighteen hands.