Abstract: A communication method of a wireless camera comprising: connecting a pluggable device to a computing device, wherein the computing device is configured to be electrically connected to a display device; when the pluggable device determines that there is no pairing connection between the pluggable device and a wireless camera, transmitting a designated image to the computing device by the pluggable device, so that the computing device controls the display device to display the designated image, wherein the designated image has pairing data; capturing and analyzing the designated image to obtain the pairing data by the wireless camera, and establishing the pairing connection by the wireless camera according to the pairing data.

Abstract: A transparency adjustment method adapted to a target object image shown in a video comprising: extracting a first frame from the video and then extracting a second frame from the video, wherein the target object image is not in the first frame and is in the second frame; selecting a target block from the second frame, wherein the target block contains the target object image; obtaining a position of the target block in the second frame and selecting a background block from the first frame according to the position; replacing the target block with the background block to generate a third frame, wherein the third frame comprises the background block and a part of the second frame other than the target block; and generating an output frame according to the third frame, a transparency parameter, and one of the second frame and the target block.