Module presets

Expand description

Pre-defined viewing condition presets for common scenarios.

These presets model real-world viewing scenarios including srcset image delivery on various devices.

Native: srcset matches device DPPX (1x on 1x, 2x on 2x, etc.)
Undersized: srcset is smaller than device (browser upscales, artifacts amplified)
Oversized: srcset is larger than device (browser downscales, artifacts hidden)

Device	Base PPD	Typical DPPX	Viewing Distance
Desktop	40	1.0	~24“ / 60cm
Laptop	70	2.0	~18“ / 45cm
Phone	95	3.0	~12“ / 30cm

Functions§

all: All standard presets for comprehensive analysis.
baseline: Baseline condition for quality mapping (native laptop).
demanding: Most demanding condition for diminishing returns analysis.
key: Key presets for compact analysis tables.
native_desktop: Desktop monitor at arm’s length, 1x srcset on 1x display.
native_laptop: Laptop/retina screen, 2x srcset on 2x display.
native_phone: Smartphone, 3x srcset on 3x display.
srcset_1x_on_laptop: 1x srcset shown on 2x laptop display (0.5x ratio).
srcset_1x_on_phone: 1x srcset shown on 3x phone display (0.33x ratio).
srcset_2x_on_desktop: 2x srcset shown on 1x desktop display (2.0x ratio).
srcset_2x_on_laptop_1_5x: 2x srcset shown on 1.5x laptop display (1.33x ratio).
srcset_2x_on_phone: 2x srcset shown on 3x phone display (0.67x ratio).
srcset_3x_on_phone: 3x srcset shown on 3x phone display.