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Evaluate the OECF of a digital camera based on ISO 14524 and ISO 16505

Test chart TE197 is designed for evaluating the opto-electronic conversion function (OECF) of a digital camera according to ISO 14524, methods for measuring OECF, and ISO 16505.

ISO 16505:2015 (currently under review) describes the requirements and test procedures for the minimum safety, ergonomic, and performance requirements for Camera Monitor Systems that replace rearview mirrors of road vehicles.

The example chart presented in ISO 16505 for OECF measurements has a different layout than the TE197. The standard states that the OECF measurement must be compliant to ISO 14524 or ISO 15739 (it is important to note that completely different groups have created these standards) both of which clearly define an OECF test chart as having a circular arrangement of grey patches, as opposed to the parallel lines of grey patches shown in the standard. A circular layout prevents grey levels from being affected differently by shading. Using this interpretation of the text, we have designed TE197 accordingly.

The chart layout consists of a 12-step circular grayscale and is available as either a reflective or transparent chart (only available as transparent in the bundle).

TE197 can be purchased individually or as a part of the ISO 16505 chart bundle. The bundle includes all of the relevant charts that are described in the standard for evaluating the performance of Camera Monitor Systems for road vehicles.

Type selectable
Format selectable
Aspect ratio 16:9
Contrast selectable
* Type:

Chart sizes

The test charts are available in the sizes listed below. Please note that some charts cannot be manufactured in all sizes due to technical reasons. Please do not hesitate to ask for additional information.

During production, specific regions of test charts are measured to qualify the production process or to create individual reference data accompanying a test chart additionally. Measured regions can be color or gray tones.

The measurement devices are calibrated regularly and proven before use. You can find further information in our reference data accuracy sheet.

Reference data accuracy of our test charts

chart size


 Picture size w x h [mm]Chart size w x h x d [mm]
(+/- 2 mm)*
A1066 800 x 600 - 1245 x 835 x 3.2
A1066 (TE42*) 900 x 675 - 1245 x 835 x 3.2
A1066 - 1066 x 600 1400 x 835 x 3.2
A1066 (TE42*) - 1200 x 675 1400 x 835 x 3.2
A540 540 x 405 540 x 303.75 600 x 500 x 3.2
A460 460 x 345 460 x 258.75 600 x 500 x 3.2
A444 - 444.4 x 250 600 x 500 x 3.2
A360 360 x 270 360 x 202.5 500 x 400 x 3.2
K360 - 360 x 202.5 390 x 271 x 2.1
A280 280 x 210 280 x 157.5 365 x 305 x 3.2
K280 280 x 210 280 x 157.5 334 x 271 x 2.1
P280 May vary in size with the chart layout 334 x 271 x 2.1
K180 - 180 x 101 204 x 164 x 2.1
K160 160 x 120 - 204 x 164 x 2.1

A charts (size 280/360/460) are mounted on aluminium plates.

A charts (size 1066) are mounted on aluminum composite panels (aluminum dibond).

K charts mounted on black polystyrene plates are only available in combination with the test chart folders

P charts are mounted on black polystyrene plates.

*Sizes are for all variations of the TE42 chart series, including TE42 V2, TE42-LL, TE42-LL Timing

chart sizes reflective


 Picture size w x h [mm]Chart size w x h x d [mm]
(+/- 2 mm)*
D280 280 x 210 280 x 157.5 360 x 280 x 4.6
D240 240 x 180 240 x 135 320 x 290 x 4.6
D240S 240 x 180 240 x 135 360 x 280 x 4.6
D205 205 x 153 205 x 115.3 253 x 202 x 3.5
D120 120 x 90 120 x 67.5 155 x 135 x 4.0
D35 32 x 24 - 50 x 50 x 3-4

D35 charts are either between glass plates or mounted in slide frames (glassless).
There are exceptions regarding mounting and size for special charts.

chart sizes transparent

Suitable transparent charts for the following illuminators

 D280 / D240SD240D205
  Spherical transparency illuminator LE6/LE7  
Lightbox illuminator LG3
Sony Pattern Box
DNP standard viewer Porta Pattern spherical
transparency illuminator  
With adapter      Spherical transparency
illuminator LE6/LE7
Lightbox illuminator LG3

*Chart sizes may vary by +/- 2 mm as they are handmade in house.