16-bit Grayscale PNG (deep colour)
A 16-bit (deep-colour) grayscale PNG holding a smooth 0–65535 gradient — for testing high-bit-depth support and spotting banding when a tool truncates to 8-bit.
Specifications
- Width
- 512
- Height
- 512
- Bit Depth
- 16
- Mode
- I;16 (grayscale)
- Values
- 0–65535
What is a .png file?
PNG (Portable Network Graphics) is a raster image format using lossless DEFLATE compression. It supports full 8- or 16-bit-per-channel truecolor, palette, and greyscale modes with an optional alpha channel, but no animation. It is the standard choice for screenshots, logos, and graphics with sharp edges or transparency.
How to use this file
Use an example PNG to test image decoders, alpha-compositing, thumbnail generators, and format converters, or to verify that a pipeline preserves transparency and color depth on round-trip.
Related files
- jpgBaseline JPEGThe fruit still life as a baseline (sequential) JPEG — paired with a progressive JPEG of identical content for testing decode order and progressive-rendering support.
- jpgCMYK JPEG (print colour space)The fruit still life converted to the CMYK (print) colour space and saved as a JPEG — for testing CMYK decoding and CMYK→RGB conversion. Some web viewers render CMYK JPEGs with a colour shift.
- jpgICC sRGB-Tagged JPEGThe fruit still life saved as a JPEG with an embedded sRGB ICC colour profile — paired with an untagged copy for testing colour-management and profile handling.
- jpgProgressive JPEGThe same photo as a progressive JPEG (loads coarse-to-fine) — the twin of the baseline JPEG, for testing progressive decoding and byte-order handling.
- jpgUntagged (No ICC) JPEGThe same photo saved with no embedded ICC profile — the untagged twin of the sRGB-tagged JPEG, for testing how a tool assumes/handles a missing colour profile.
- png16-Step Grey WedgeA 16-step greyscale wedge from pure black to pure white, for testing tone reproduction, banding, and monitor calibration.
Generated by generation/images_pipeline.py. Free for any use, no attribution required — license.