CharuCo Targets
CharuCo Targets
CharuCo Targets
CharuCo Targets
CharuCo Targets
CharuCo Targets
CharuCo Targets
CharuCo Targets
CharuCo Targets
CharuCo Targets

CharuCo Targets

Regular price €91,00 Sale

CharuCo Targets

 In CharuCo targets, fields are uniquely encoded, which makes it possible to calibrate using a partly occluded or with a non-ideal target location. It also improves robustness against image noise. These properties allow recording information from the very edges of images, which is ideal for accurate and robust determination of lens parameters. Also, the unique coding of feature points allows for stereo calibration in which corners may be partly non-visible.

CharuCo detection is implemented in the OpenCV 3 and OpenCV 4 contrib module, but is also available as a stand-alone library.

Our default selection of CharuCo targets use the DICT_5x5 dictionary. If your application requires further customization, please contact us, and we are able to accommodate any customizations of CharuCo boards. You can also provide a PDF drawing of your completely custom pattern.

 

Precision Manufactured

All of our calibration targets are made from aluminium/LDPE composite which offers excellent flatness and stiffness, while being lightweight. Additionally, the composite material offers good thermal stability and corrosion resistance.  

The patterns are transferred to the composite material using a specialised precision direct UV (Ultra-Violet) printing process resulting in a durable matte finish. Through extensive testing, we have found this process to be ideal for machine vision applications, where both accuracy, good optical performance and physical robustness are of utmost importance.

 

Sizes

The following sizes are available:

Size [mm] Size [inches]
800 x 600 x 6 31.496 x 23.622 x 0.236
600 x 400 x 6 23.622 x 15.748 x 0.236
400 x 300 x 6 15.748 x 11.811 x 0.236
300 x 200 x 6 11.811 x 7.874 x 0.236
200 x 150 x 6 7.874 x 5.905 x 0.236

Patterns

We offer two pattern options, Fine and Coarse, which have been specifically designed to work optimally with high (Fine) and low (Coarse) resolution cameras. The following tables illustrate the available options:

Fine

Plate Size [mm] Checker Width [mm] Rows x Columns
800 x 600 x 6 30 18 x 25
600 x 400 x 6 20 18 x 29
400 x 300 x 6 15 18 x 25
300 x 200 x 6 10 18 x 29
200 x 150 x 6 7.5 18 x 25

 

Coarse

Plate Size [mm] Checker Width [mm] Rows x Columns
800 x 600 x 6 60 9 x 12
600 x 400 x 6 40 9 x 14
400 x 300 x 6 30 9 x 12
300 x 200 x 6 20 9 x 14
200 x 150 x 6 15 9 x 12

  

Technical Specifications

Weight 6.6 kg/m²
Outdoor Lifetime up to 3 years
Temperature Resistance -50 °C to + 80 °C  [-58 °F to +176 °F]
Specified temperature 20 °C (ISO 1:2016)
Linear thermal expansion ~24 μm /(°C · m)
Rigidity E·J

3840 kNcm2/m