Apple — Ground-Truth Alpha Mask (512px)
The binary ground-truth alpha mask (white = subject, black = background) for the cluttered-background apple — compute IoU or boundary F-score of a predicted mask against this file.
Specifications
- Width
- 512
- Height
- 512
- Mode
- L (1-bit look)
- Role
- ground-truth alpha mask
- Foreground
- white
- Background
- black
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
- pngAlpha-Channel Reveal (512px)A left-to-right alpha gradient over a solid colour, for testing how a viewer or compositor renders partial transparency.
- pngCoffee Mug — Transparent Cut-out (512px)The expected transparent cut-out of the coffee mug, paired with the on-background version — the ground truth for a background-removal test.
- pngCoffee Mug on Studio Background (512px)A coffee mug photographed on a clean studio-white background — the easy input for a background remover, paired 1:1 with its transparent cut-out for scoring.
- pngCoffee Mug with Soft Shadow (512px)The coffee mug with a soft drop shadow on transparency — tests whether a background remover keeps or discards the contact shadow.
- pngPotted Plant — Fine-Edge Test (512px)A potted plant with many thin leaves and stems on transparency — the canonical fine-edge test for how cleanly a background remover cuts around delicate foliage.
- pngSemi-Transparent Drinking Glass (512px)A half-full drinking glass rendered with partial transparency — the hard case for background removers that assume every subject pixel is opaque.
Generated by generation/images_bgremoval.py. Free for any use, no attribution required — license.