Complete software solution for machine vision inspection and advanced photometric analysis of backlit icons, text, and shapes
Evaluating backlit components-such as illuminated controls, instrument panels, and LED light strips-requires a unique measurement approach. The quality of an illuminated component is determined as much by its photometric qualities (brightness, color) as it is by the overall integrity of its illuminated regions (correct shape, free from defects). Accurate measurement requires precise registration of icons and shapes, ensuring that only the illuminated region is used to quantify photometric values and that defects can be detected. While photometric measurement systems excel at light and color analysis, they have traditionally lacked machine vision functionality that enables consistent registration of unique shapes, as well as overall inspection of shape or text quality.
A comprehensive backlit component inspection solution from Radiant combines TrueTest Software with the additional VIP license and a ProMetric® Imaging Colorimeter or Photometer to perform rapid, automated registration and measurement of backlit icons, text, and shapes. VIP registers illuminated regions in images captured by a ProMetric imager to measure multiple regions simultaneously, capturing and processing data much faster and more accurately than a human inspector or a spot measurement device. VIP also provides quantifiable photometric data correlated to human visual perception that is not measured by traditional machine vision systems.
Backlit Component Inspection
- MIL-DTL-7788 (formerly SAE AS7788) - "Panels, Information, Integrally Illuminated" standard for backlit instrument panels (such as flight deck controls in an aircraft)
- FMVSS 111 - "Rear Visibility" standard, as it pertains to indicators in vehicle rearview mirrors (such as blind zone indicators in sideview mirrors)
VIP adds advanced registration and defect detection functionality to TrueTest Software to combine the benefits of photometric and machine vision systems, offering efficiency over solutions that employ multiple technologies. With VIP, a Radiant TrueTest solution is able to address the complete set of visual quality requirements necessary for backlit component inspection.
Photometric data reported and evaluated using VIP in TrueTest Software includes:
- Luminance (Lv, cd/m2)
- CIE Chromaticity Coordinates (xy, u'v')
- L*a*b* Color Scale
- Correlated Color Temperature (CCT)
- Dominant Wavelength (nm)
VIP automatically locates and registers icons or shapes in new orientations (as components move or shift) while maintaining the same relative POI placement within each registration region.