Module 03 Summary

What this module established

Blurring discards small fast changes, and both noise and detail are small fast changes - there is no setting that removes only one. Choose the kernel from the size of your feature and measure both effects.

Carry forward

• Sharpening boosts noise and edges equally, because both are local intensity change. Denoise first, and never expect it to undo an earlier blur.
• Uneven lighting needs an adaptive threshold. No global value exists when the background at one end is brighter than the object at the other.
• Open then close, and watch the component count. Every hard-coded constant is an assumption about lighting that only different images expose.

Before moving on

Move on when your pipeline has been tested across three real conditions and every hard-coded constant is listed with what it assumes.

Mark complete