Image encoding device, image encoding method, program, image decoding device, image decoding method, and program
The method addresses inefficiencies in encoding asymmetric subblocks by using pixel-based quantization control thresholds, enhancing encoding efficiency through hierarchical and asymmetric tree partitions.
WO2026105732A1PCT designated stage Publication Date: 2026-05-21CANON KK
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Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- CANON KK
- Filing Date
- 2025-11-11
- Publication Date
- 2026-05-21
AI Technical Summary
Technical Problem
Existing image encoding methods struggle to efficiently compress data using asymmetric partitioning shapes, leading to inefficiencies in quantization parameter encoding for subblocks generated by asymmetric block divisions.
Method used
A method for encoding quantization parameters based on the number of pixels in subblocks, allowing for efficient encoding even in asymmetrically divided blocks, using a combination of hierarchical and asymmetric tree partitions to determine quantization control thresholds.
Benefits of technology
Enables high-efficiency compression of subblocks generated by asymmetric partitioning, optimizing quantization parameter usage and improving encoding efficiency.
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Smart Images
Figure JP2025039403_21052026_PF_FP_ABST
Abstract
Provided is a decoding method characterized by comprising: a step for decoding an image composed of one or more blocks into which the image is partitioned and sub-blocks into which said one or more blocks are further partitioned, wherein the partitioning of a block into sub-blocks includes asymmetric partitioning; and a step for decoding a quantization parameter at least on the basis of information pertaining to the number of pixels of the sub-blocks in the asymmetrically partitioned blocks.
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