IMAGE ENCODING/DECODING METHOD AND DEVICE FOR PERFORMING FEATURE QUANTIZATION/DE-QUANTIZATION, AND RECORDING MEDIUM FOR STORING BITSTREAM

摘要

An image encoding/decoding method and device is provided. The image decoding method according to the present disclosure may comprise the steps of: obtaining, from a bitstream, a feature set extracted from an input image by using an artificial neural network-based feature extraction method, first information relating to the importance of each of a plurality of channels included in the feature set, and second information relating to a quantization method for the feature set; decoding the feature set, the first information, and the second information; and de-quantizing the decoded feature set on the basis of the decoded first information and the decoded second information, wherein the second information includes the number of quantization bits of each of the plurality of channels, and the number of quantization bits is determined on the basis of the importance of each of the plurality of channels.