16. März 2021, 16:59 Uhr | Andreas Knoll
The logo of the EMVA
EMVA has introduced Release 4.0 of its EMVA 1288 standard for objective characterization of industrial cameras, which is used worldwide. The new version was published as a release candidate on March 16 and is intended to reflect the rapid development of camera and image sensor technology.
Until the previous Release 3.1 dated back December 2016, the application of the EMVA 1288 standard with a simple linear model was limited to cameras with a linear response and without any pre-processing. While this model is being continued with some improvements in the ’Release 4.0 Linear’, a new module ‘Release 4.0 General’ has been added in the latest release. With it, the characterization of a non-linear camera or a camera with unknown pre-processing is possible even without any model due to the universal system-theoretical approach of the EMVA 1288 standard. Just as with the linear camera model, all application-related quality parameters can be measured in this way. Depending on the camera characteristics, the evaluation can now be applied according to the linear or general model.
In addition, Release 4.0 includes numerous expansions to characterize the latest generation of image sensors and cameras according to the application. The most important of these are:
• Extended wavelength range from UV to SWIR range.
• Raw data of any given image acquisition modality can now be characterized according to the standard.
• The versatile and universal analysis tools of the EMVA 1288 standard can also be applied to quantities calculated and derived from multiple channels. For polarization image sensors, these are, for example, the degree of polarization and the polarization angle.
• Inhomogeneities are measured in detail and now decomposed into column, row, and pixel variations. They can now be determined with a new method at all intensity levels from just two captured images.
• Optionally, cameras with optics or with illumination as given by the position of the exit pupil of the optics for which the image sensor was designed can be measured according to the standard. Thus, the standard is now also suitable for image sensors with pixels shifted towards the edge.
• A more suitable measure for the linearity of the characteristic curve is introduced.
After publication of the release candidate, the new Release 4.0 will automatically replace the old Release 3.1 after a three months period (therefore by mid-June) if no objections are submitted to the EMVA during this period and if objections can be resolved.
Along with the new version of the standard, the EMVA has prepared an extensive training program. Two- or three-day training programs for the new Release 4.0 will be held regularly in near future in cooperation with EMVA member companies. The new training program will also continue the successfully introduced certification program at expert level. This is intended for anyone who wants to acquire the necessary knowledge to perform EMVA 1288 measurements themselves and understand the measurement results in detail, whether in the development of new cameras, in quality control, or to understand exactly how a camera behaves for a specific application.