Patent ID: 11861814
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 7:
8. A method for sensing an image based on an event, comprising:
acquiring at least one of brightness information and color information from an input image signal;
performing conversion including at least one of filtering of at least one of the acquired brightness information and color information, color conversion, and brightness conversion;
calculating a quantized difference for each pixel between a first converted image, converted from the currently input image signal, and a second converted image, converted from a previously input image signal; and
generating a bitstream from information about a pixel having a change on a time axis based on the quantized difference;
wherein:
when the second converted image comprises multiple second converted images, calculating the quantized difference is configured to compute a weighted sum of the multiple second converted images based on respective weights assigned to the multiple second converted images and to calculate a difference from the first converted image,
where a sum of the weights is ‘1’.