Advanced everything in Computer Vision, page 5
Affine Transformations: Move, Scale, and Rotate Without Bending
An affine transformation is a way to move, scale, rotate, or shear an object while keeping all lines straight and parallel lines parallel. It's used everywhere in computer graphics.
Canny Edge Detector: Finding True Edges
The Canny detector finds true edges by identifying sharp, connected intensity changes. It's used in object detection and feature extraction where clean edge maps are vital.
Bayer Filter: Faking Full Color with a Filter Grid
A Bayer filter is a hack for capturing color with one sensor: a checkerboard of red, green, and blue filters is placed over the sensor grid. This is how most digital cameras work. The footgun is that the raw output must be 'demosaiced' to create.
BRDF: Modeling How Surfaces Reflect Light
A BRDF is a function that describes a surface's appearance by defining how it reflects light from any incoming direction to any viewing direction. It's used in rendering engines to create materials like brushed metal or velvet.
Radiometry: Measuring Light as Physics, Not Perception
Radiometry measures light's physical power, not how humans perceive it. It's for objective energy measurement in computer vision or physics simulations, using watts, not lumens. The footgun is confusing it with photometry, which is weighted for human vision.
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