Registration, Filtering, and Contrast Enhancement — Vocabulary

Vocabulary flashcards covering registration, filtering, and contrast enhancement concepts from the lecture notes.

Rigid Registration

A registration approach that assumes images differ only by rigid transformation (translation and rotation).

Non-Rigid Registration

A registration approach that accounts for local deformations, allowing matching of anatomical structures that may have changed over time.

Image Filtering

A process that modifies an image to emphasize or suppress certain features, such as edges or textures.

Low-Pass Filter

A filter that smooths an image by reducing high-frequency components, useful for noise reduction.

High-Pass Filter

A filter that emphasizes edges by highlighting high-frequency components.

Filtering Applications

Applications of filtering such as enhancing tumor boundaries in CT scans or sharpening features in X-ray images.

Contrast Stretching

Enhances image contrast by adjusting the intensity range to span a wider dynamic range.

Histogram Equalization

Improves global image contrast by redistributing pixel intensity levels.

Edges

Boundaries between regions in an image; often highlighted by high-pass filtering.