Method for verifying image data encoded in an encoder unit

Method for verifying image data encoded in an encoder unit, wherein the encoder unit comprises a safe part and a non-safe part, and wherein the method (1) comprises the steps of:

• Acquiring image data in the safe part of the encoder unit (2);
• Encoding the acquired image data by a non-safe encoder in the non-safe part of the encoder unit (3);
• Decoding the encoded image data by a non-safe decoder in the non-safe part of the encoder unit (4);
• and
• Comparing the decoded image data with the acquired image data in the safe part of the encoder unit (5), wherein if the decoded image data does not match the acquired image data exactly nor within an acceptable threshold for the comparison a safety focused reaction is initiated, and wherein if the decoded image data matches the acquired image data exactly or within the acceptable threshold for the comparison a first safety sequence is generated based on the decoded image data in the safe part of the encoder unit and the encoded image data and the first safety sequence are transmitted to a decoder unit for decoding the encoded image data,
• wherein safe means that the corresponding part is safety-qualified and/or has a high Integrity level and non-safe means that the corresponding part is not safety critical and does not have to be safety-qualified, wherein the safety focused reaction comprises flagging decoded image data that does not correspond to the originally acquired image data, respectively regions in the decoded image data that do not correspond to the corresponding regions in the originally acquired image data, or turning the corresponding source of image data off and/or deleting the image data acquired from the corresponding source of image data, and wherein the first safety sequence is one of a cryptographic hash, a checksum or a signature.