Image Negative Space Analyzer
Choose an image, tune what counts as visually quiet, and inspect a composition aid that never leaves your browser.
A QUICK WALKTHROUGH
How to use this tool
- Choose one JPEG, PNG, or WebP within the file and pixel limits.
- Set a 0–80 local color-difference threshold and analyze a bounded downsample.
- Review the estimated quiet-area percentage and highlighted 3×3 zone against the real image.
A visual-complexity heuristic
Each downsampled pixel is scored from its average absolute RGB difference from its right and lower neighbors. Scores at or below the selected threshold are classified as low complexity. This is not subject segmentation or an objective measurement of negative space.
Nine overlay zones
The image is split into a 3×3 grid. The suggested zone has the greatest share of low-complexity samples, with lower average complexity breaking ties. It is a starting point for text placement, not a guarantee of readability.
Local bounded analysis
One image up to 10 MB, 4,096 pixels per side, and 16 megapixels is decoded locally. Analysis uses at most a 256×256 sample grid; the preview uses a bounded canvas. Metadata and animation are not retained.
GOOD TO KNOW
Common questions
Does it detect the subject or remove a background?
No. It measures local pixel variation and does not recognize people, products, objects, saliency, or semantic background.
Why can a flat-colored subject count as open space?
Low texture can look like negative space to this heuristic. Inspect the highlighted zone against the actual subject before placing text.