Document ID: chunk:federal_register_of_legislation:F2024C00148:reg:12:p1
Version: federal_register_of_legislation:F2024C00148
Segment Type: reg
Provision Reference: reg 12 (pt 1/24)
Character Range: 231386–234635

12              0.10
Background      0.54 ±0.05

Measure the luminance Yi of each grey patch i = 1…12 by using the reference camera. Then, calculate the lightness of each grey patch:
               , when Yi/Y12 > 0.008856

              , when Yi/Y12 ≤ 0.008856

Calculate the lightness difference between each grey patch:

              and compare the result with the requirement.

              2.  Special requirements to be applied to the safety aspects of camera monitor systems for indirect vision

              2.1.  General

              The purpose of this paragraph is to specify the requirements for documentation and verification for CMS for indirect vision of Classes I to IV to replace mandatory rear-view mirrors for road vehicles.

              "The System", referred to herein, is the one for which type approval is being sought.

              This paragraph 2. does not specify the performance criteria for "The System" but covers the methodology applied to the design process and the information which shall be disclosed to the Technical Service, for type approval purposes.

              This information shall show that "The System" respects, under normal and fault conditions, all the appropriate performance requirements specified elsewhere in this Regulation.

              2.2.  Definitions

              2.2.1.  Camera Monitor System (CMS)

              A CMS is used in road vehicles to present the required outside information of a specific field of view to the driver. It replaces a conventional legally prescribed mirror system on the vehicle by means of electronic image capture and display systems.

              It consists of a camera that is usually installed at the bodywork of a vehicle and a monitor that is usually placed inside the vehicle.

              2.2.2.  Camera

              A camera is a device to capture colour images of a specific field of view. It mainly consists of two relevant items: imager and lens.

              2.2.3.  Monitor

              A monitor is a device for displaying images. It either consists of a matrix of active areas that radiate light of different wavelengths or is a (usually diffuse) reflector that is illuminated in different wavelengths and in a matrix of specific points by a projector.

              2.2.4.  Control unit

              A control unit is a component which controls communication and coordination between electronic components, e.g. a camera and a monitor.

              2.2.5.  Safety concept

              A safety concept is a description of the measures designed into the system, for example within the electronic units, so as to address system integrity and thereby ensure safe operation even in the event of a system or electrical failure.

              2.2.6.  "Boundary of functional operation"

              "Boundary of functional operation" defines the boundaries of the external physical limits within which the system is able to maintain functionality.

              2.3.  Documentation

              2.3.1.  The vehicle manufacturer shall provide the following documentation:

                  (a)  A description of the camera monitor system which gives an explanation of the main function of the system, incl.