BS EN 1330-10:2003 – Non-destructive testing — Terminology — Part 10: Terms used in visual testing

1 Scope
This European Standard defines the terms used in visual testing.
2 Terms and definitions
2.1
angle of vision
angle between the surface to be tested or viewed and the point of observation
NOTE See Figure 1
2.2
archival image recording system system for recording and archiving images
2.3
auxiliary lighting
lighting in addition to the naturall or principal lighting
2.4
borescope
endoscope to transmit images for visual testing
NOTE Sae endoscope, fibrescope, videoscope.
2.5
colour discrimination
perception of the difference belween two or morewavelengths of light
2.6
colour temperature
ratingof a lightsource forcolourspectrumexpressed as an absolute temperature
2.7
colour vision
distinction oflight of different intensities andwavelengths
2.8
contrast ratio
relationshipbetween theperceivedlevelsofbrightness of different sections of an image
2.9
demonstration testpiece
testpiece with indications as close as possible tothose to be detecled on the component to be tesled
2.10
detection criteria
criteria which are used lo determine the form/stateand size of detail to be detected
2.11
digital image processing equipment
system for digital image measurement,adjustmentormanipulation(alteration) to performimageanalysis to assist wisual interpretation
BS EN 1330-10:2003 – Non-destructive testing — Terminology — Part 10: Terms used in visual testing