Abstract: A method for avatar virtual arm movement, the method may include (i) capturing, by a camera of a participant of a video conference, a hand gesture made by the participant without capturing an arm movement of the participant, the arm movement is associated with the hand gesture; (ii) determining the arm movement of the participant, based on the hand gesture; (iii) determining a virtual movement of an arm of an avatar of the participant within a virtual video conference environment, the virtual movement of the arm of the avatar of the participant mimics the arm movement of the participant; and (iv) assisting to perform the virtual arm movement of the avatar within the virtual video conference environment.

Abstract: A method for generating alpha channel information related to a person, the method may include generating the alpha channel information related to the person by an alpha channel neural network; wherein the alpha channel machine learning process is trained using ground truth alpha channel information that is associated with background information; wherein the ground-truth alpha channel information is generated by: obtaining input images of the person; wherein each image comprises the person and an arbitrary background; repeating, for each input image of the input images, converting the input image, by a portrait matting predictor, to (a) a first colored background image that comprises the person and a background of a first color, and (b) a second colored background image that comprises the person and a background of a second color; wherein the first color differs from the second color.