Generally good:
- Automated missions
- Bricks or traditional building materials / high-texture surfaces
- Overcast days or those with uniform light
- Appropriate distance from imager to POI
- Strong foreground, weak or absent background
- Timing the photographs closely together / same day
Try to avoid:
- Editing images, including cropping
- Glass, water, cars; any reflective or anisotropic material
- Moving objects (tall grass, trees, etc.)
- Thin, wiry objects
- Highly flat, uniform, low-texture surfaces
- Too much sun or aiming the imager into the sun