Your mission in this chapter
- Learn
Find the weakest images in a pack before committing them to a watermark method.
- Try
Score a flat, textured, dark, and exported image, then compare the spread.
- Prove
You treat the score as a carrier heuristic and confirm important routes with a real round-trip.
Loading the interactive demo for "Will this image carry a mark?"… The lesson text below is already here. The hands-on part loads next (requires JavaScript).
Three outputs, three different claims
The labels are deliberately not interchangeable.
Edges and texture create room to test.
Thresholds are illustrative, not calibrated probabilities.
Run the chosen method through the real route.
Not all images are equal carriers, and the difference decides your method before you generate a single copy. This lab scores any photo on texture and edges.
Bring your weakest pack image: gradients, skies, solid backdrops. The gap between best and worst is your real risk spread.
What the score measures
Texture variance: how much the pixels disagree with each other. Edge density: how many strong gradients cross the frame. Combined into 0-100.
Above 70 is a favorable heuristic tier. 40-70 is mixed, and below 40 suggests weak conditions for fragile methods: verify every important route with a real round-trip.
How to use it on a real pack
Score five images: your favorite, your flattest, your noisiest, your darkest, one client export. Assign methods by tier instead of guessing.
Weak carriers are not failures. They are the reason robust methods exist. Knowing is the entire point.
Takeaways
- Texture and edges are hiding space; flat gradients starve fragile methods.
- Score your weakest pack image first.
- Weak carriers need robust methods plus a verification round-trip.
Check yourself
Optional, local, instant. 0/2 answered.
- Which image starves fragile methods?
- A carrier score of 30 means…
Prove the carrier boundary
Use the carrier estimate to choose a test, not to promise survival.
A single image is an observation, not a pack-wide guarantee.
The score is not a calibrated probability of watermark recovery.
Only the actual route can validate the method choice.
For your niche
Creamy bokeh backgrounds score low despite gorgeous subjects. Foreground texture still carries. Check both zones mentally.
Bedroom walls and plain backdrops are classic weak carriers. Shoot one textured set per pack as your tracing anchor.
Flat fills score low, inked linework scores high. A signature or line-art border doubles as hiding space.