自适应FPGA后处理加速器系统及基于FPGA的目标检测后处理方法

By using an adaptive FPGA post-processing accelerator system that integrates DFL pipeline decoding, confidence filtering, and dynamic congestion control modules, the latency and storage bottlenecks in FPGA target detection post-processing are solved, achieving low-latency and high-efficiency target detection post-processing.

CN122416221APending Publication Date: 2026-07-17INST OF OPTICS & ELECTRONICS CHINESE ACAD OF SCI

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF OPTICS & ELECTRONICS CHINESE ACAD OF SCI
Filing Date
2026-04-28
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing FPGA target detection post-processing suffers from bottlenecks such as large DFL decoding latency, fixed confidence filtering thresholds that cannot adapt to dynamic load changes in the NMS module, and the need for data to pass through off-chip memory between modules.

Method used

An adaptive FPGA post-processing accelerator system was designed, which integrates a DFL pipeline decoding module, a confidence filtering module, a dual-mode NMS module, and a dynamic congestion control module to achieve low-latency on-chip pipelined processing. The confidence threshold is adjusted through closed-loop feedback to adapt to the dynamic load changes of the NMS module.

Benefits of technology

It significantly reduces data migration latency and storage bandwidth usage, avoids processing unit congestion, ensures continuous and efficient pipeline operation, and achieves low-latency target detection post-processing.

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Abstract

本发明公开了自适应FPGA后处理加速器系统及基于FPGA的目标检测后处理方法。系统包括:融合DFL流水线解码模块,用于通过四级流水线加法树结构将分布概率张量还原为目标框几何坐标;置信度过滤模块,用于根据动态阈值对解码后的目标框进行置信度过滤,输出有效候选框;双模式NMS模块,包含由多个处理单元构成的脉动阵列,用于根据模式选择信号对有效候选框执行非极大值抑制,输出最终检测结果,并实时输出当前处理单元占用数量的状态信号;动态拥塞控制模块,用于根据所述处理单元占用数量实时计算动态阈值并输出至置信度过滤模块的控制输入端,形成闭环控制,数据在各模块之间以片内流水线方式传输,无需经过片外存储器。
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