A method for teletransmitting to a processing site a video stream captured at a remote scene of intervention, comprising a processing of said video stream in such a way as to erase specific zones (I1, I2, I3), then a transmission of said stream thus processed to said processing site, implemented to remotely assist a field operator working on a unit or object (E, E', E'') having a known geometric shape in said remote scene of intervention, characterised in that it further comprises the steps of: - capturing, by means of a camera of a portable equipment used by the field operator, a video stream relating to an intervention scene (SI, SI', SI") including said unit or object (E, E', E''), - extracting (T1, T1'), in said video stream thus captured, a limited stream (FE, FE') from said unit or object (E, E', E") with a neutral background, - processing (T2, T2') said extracted video stream, comprising erasing specific zones (I1, I2, I3; I4, I5; I6, I7) within said unit or object (E, E', E"), by means of colouring or transparency, - transmitting said video stream thus processed to a teleassistance site via a communication network, processing that stream at said teleassistance site, comprising enriching said stream by means of augmented reality techniques and/or generating an assistance instruction, - transmitting said enriched stream and/or said instruction from the teleassistance site to the portable equipment of the field operator, - visualising said enriched stream and/or said assistance instruction on a screen within said portable equipment or connected glasses, and in that the step of processing the extracted video stream further comprises a step for modifying, by means of optical or digital filters, contextual characteristics of the content of the video stream (FI') that are extrinsic to the identified object or unit (E') and/or that are carriers of semantic information inherent to the environment of said object or unit (E'). - capturing, by means of a camera of a portable equipment used by the field operator, a video stream relating to an intervention scene (SI, SI', SI") including said unit or object (E, E', E''), - extracting (T1, T1'), in said video stream thus captured, a limited stream (FE, FE') from said unit or object (E, E', E") with a neutral background, - processing (T2, T2') said extracted video stream, comprising erasing specific zones (I1, I2, I3; I4, I5; I6, I7) within said unit or object (E, E', E"), by means of colouring or transparency, - transmitting said video stream thus processed to a teleassistance site via a communication network, processing that stream at said teleassistance site, comprising enriching said stream by means of augmented reality techniques and/or generating an assistance instruction, - transmitting said enriched stream and/or said instruction from the teleassistance site to the portable equipment of the field operator, - visualising said enriched stream and/or said assistance instruction on a screen within said portable equipment or connected glasses, and in that the step of processing the extracted video stream further comprises a step for modifying, by means of optical or digital filters, contextual characteristics of the content of the video stream (FI') that are extrinsic to the identified object or unit (E') and/or that are carriers of semantic information inherent to the environment of said object or unit (E').