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Release 4.0 of EMVA1288 addresses non-linear cameras

The European Machine Vision Association has announced release 4.0 of its 1288 standard for characterising industrial cameras.

Release 4.0 includes the ability to characterise non-linear cameras and cameras with unknown pre-processing. The previous release, 3.1, was based on a linear model and was limited to cameras with a linear response and without any pre-processing.

The new release contains improvements to the linear model, while also addressing non-linear cameras thanks to a universal theoretical system approach to characterising cameras.

All application-related quality parameters can be measured with EMVA 1288. The standard defines a unified method to measure, compute and present specification parameters for cameras and image sensors used for machine vision. It creates transparency by defining reliable and exact measurement procedures, as well as data presentation guidelines. It makes the comparison of cameras and image sensors easier.

Release 4.0 also includes expansions to characterise the latest generation of image sensors and cameras. It now covers an extended wavelength range from the UV to SWIR; raw data of any given image acquisition modality can now be characterised according to the standard; and the analysis tools of the standard can also be applied to quantities calculated and derived from multiple channels – for polarisation image sensors, these are, for example, the degree of polarisation and the polarisation angle.

Inhomogeneities are measured in detail and are now split into column, row, and pixel variations. They can 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. The standard is therefore now also suitable for image sensors with pixels shifted towards the edge.

A more suitable measure for the linearity of the characteristic curve has also been introduced.

Release 4.0 will automatically replace release 3.1 after a three months (by mid-June) if no objections are submitted to the EMVA during this period, and if objections can be resolved.

Two- or three-day training courses for the new release will be held regularly in the near future in cooperation with EMVA member companies. The training will offer an expert certification, which is intended for anyone who wants to acquire the necessary knowledge to perform EMVA 1288 measurements themselves.

Framos will host a training course on 19 to 20 May, taught by Professor Dr Bernd Jähne. More details and instructions on how to register can be found here.


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