Definitions for "Test pattern"
Any of various combinations of converging lines, alignment marks, colored bars and gray scales appearing on screen to aid in the adjustments of video equipment optimal for picture alignment, registration, and contrast. Often viewed on broadcast television in off air hours. (See Color Bars.)
A chart especially prepared for checking the performance of a closed circuit TV system.
Generic term for picture created by optical or electronic means for purpose of test. Patterns may be line repetitive (e. g EBU Color Bars), a matrix of line-repetitive patterns (e. g SMPTE Color Bars which have three distinct regions) or frame-based.