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示例:如何将目标检测算法YOLOv2映射到Xilinx FPGA Zedboard

由于目前处于Deadline时期,要等下个礼拜才有时间把完整的整个流程在Github上分享一下,现在只能先用中文简单描述一下整个流程:从Darknet 框架中的YOLOv2模型到最终生成bitstream的过程。
(1)需要先从Darknet官网下载darknet框架,然后将其中YOLOv2的权重提取出来。由于YOLOv2的卷积层基本都会跟着BatchNormalization,所以在提取权重的过程中,就将YOLOv2中的weight和bias分别和对应的BN乘在一起具体公式可以参考文献[1],公式如下:
y=(x-bn0)/sqrt(bn1) (1)
z=sc0y+sc1 (2)
所以,可以将(1)与(2)合并,得到:
y=A
x+B (3)
其中 A= sc0/sqpr(bn1), B=sc1-sc0*bn0/sqrt(bn1)
这部分代码放在framework目录下

参考文献:
[1] An Automatic RTL Compiler for High-Throughput FPGA Implementation of Diverse Deep Convolutional Neural Networks

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