Starship flight test 5
On October 13, 2024, SpaceX’s Starship Flight Test 5 delivered the Starship upper stage into a suborbital trajectory, and the Super Heavy booster was caught by the chopstick arms on the launch towe...
Andrew Ke's Blog
RAW to HDR color accuracy - Lightroom, darktable, Photomator
HDR images best viewed on an HDR capable device + browser. Recommended setup: Macbook Pro 16 with internal XDR display + Google Chrome. An HDR YouTube video was displayed on the M1 Macbook Pro 16...
HDR Experience in Ubuntu 26.04 (Chrome, NVIDIA RTX 2080)
Quick notes on running HDR10 on Ubuntu 26.04 LTS using KDE Plasma 6 (Wayland) and NVIDIA GeForce RTX 2080. Hardware & Setup OS / Desktop: Ubuntu 26.04 LTS with KDE Plasma 6 (KWin Wayland) ...
Memory bandwidth comparison across devices
A comparison of theoretical peak memory bandwidth, bus widths, and memory standards across mobile SoCs, laptop workstations, desktop PCs, and discrete laptop GPUs: Device /Processor...
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Smartphone power efficiency comparison
This post is a work in progress. Smartphone max package power This section is a work in progress. I will try to find package power, or estimate from total device power. The iPhone 17 Pro Max ...
Huawei Pura 70 Pro+ HarmonyOS Review
This post is a work in progress. Tested on HarmonyOS 6.1.0.117 App compatibility Fortnite ❌ The app installs via 卓易通, but after it downloads about 4GB of game data, it crashes to the home scr...
HDR video exposure normalisation behavior across platforms
This post is a work in progress. Website with PQ and HLG HDR video test charts https://andrewkeyanzhe.github.io/100_203_nits_PQ_HLG_patterns/4_compare.html Behaviour of Chrome on Windows These...
HDR headroom and compositor behavior: Android vs iPhone
As a reference, the iPhone 14 Pro Max has a maximum HDR to SDR ratio of 8.0 (Source: Explore HDR rendering with EDR - WWDC21 at timestamp 5:08). iPhone with Super Retina XDR display: Up to 8x S...
YouTube 4K VP9 HDR vs 8K AV1 HDR encode quality
Comparison of YouTube’s HDR encoding quality: 4K VP9 HDR vs 8K AV1 HDR vs original 4K export YouTube has encoded the video Fire performance at Homerton College, HDR into the following formats: ...
Davinci Resolve for Windows shows HDR content 20% darker than reference
Davinci Resolve 20.3.1 for Windows shows HDR content with luminance values 20% darker than reference. So, a 100 nit HDR pattern will be displayed at 80 nits in Resolve’s viewer. As a result, there ...