A method for managing image data in a vehicle lighting system, the lighting system comprising: - at least one lighting module capable of projecting lighting functions on the basis of compressed image data, and - a multiplexed bus CAN or CAN-FD protocol for transmitting compressed image data to said at least one lighting module, the method comprising the following steps: - receiving an instruction to trigger at least one lighting function (HB, ADB, RW), characterized in that said at least one lighting function (HB, ADB, RW) is configured to be generated by the at least one lighting module from compressed image data corresponding to lighting patterns displayed in a given frequency range (FPSRg), and characterized in that the method comprises the following steps: - determining, for the generation of at least one lighting function (HB, ADB, RW) at a first frequency chosen in said frequency range (FPSRg), a bit rate level (NvDbReq) required to transmit the compressed image data over said multiplexed bus, - comparing the determined bit rate level (NvDbReq) with a bit rate threshold value (NvDbO) of the multiplexed bus, compressing the image data of the at least one lighting function (HB, ADB, RW) at: • said first frequency when the determined bit rate level (NvDbReq) is lower than or equal to said bit rate threshold value (NvDbO), and at • a second frequency chosen in said frequency range (FPSRg) such that the second frequency is lower than the first frequency, when the determined bit rate level (NvDbReq) is greater than said bit rate threshold value (NvDbO), - transmitting the image data compressed at one of the first and second frequencies to said at least one lighting module via said multiplexed bus in order for the at least one lighting function (HB, ADB, RW) to be generated. - at least one lighting module capable of projecting lighting functions on the basis of compressed image data, and - a multiplexed bus CAN or CAN-FD protocol for transmitting compressed image data to said at least one lighting module, - receiving an instruction to trigger at least one lighting function (HB, ADB, RW), characterized in that said at least one lighting function (HB, ADB, RW) is configured to be generated by the at least one lighting module from compressed image data corresponding to lighting patterns displayed in a given frequency range (FPSRg), and characterized in that the method comprises the following steps: - determining, for the generation of at least one lighting function (HB, ADB, RW) at a first frequency chosen in said frequency range (FPSRg), a bit rate level (NvDbReq) required to transmit the compressed image data over said multiplexed bus, - comparing the determined bit rate level (NvDbReq) with a bit rate threshold value (NvDbO) of the multiplexed bus, compressing the image data of the at least one lighting function (HB, ADB, RW) at: • said first frequency when the determined bit rate level (NvDbReq) is lower than or equal to said bit rate threshold value (NvDbO), and at • a second frequency chosen in said frequency range (FPSRg) such that the second frequency is lower than the first frequency, when the determined bit rate level (NvDbReq) is greater than said bit rate threshold value (NvDbO), • said first frequency when the determined bit rate level (NvDbReq) is lower than or equal to said bit rate threshold value (NvDbO), and at • a second frequency chosen in said frequency range (FPSRg) such that the second frequency is lower than the first frequency, when the determined bit rate level (NvDbReq) is greater than said bit rate threshold value (NvDbO), - transmitting the image data compressed at one of the first and second frequencies to said at least one lighting module via said multiplexed bus in order for the at least one lighting function (HB, ADB, RW) to be generated.