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How could I implement Retina Net or feature pyramidal network for object detection by only using deep learning toolbox?

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DaeYoung
DaeYoung on 10 Aug 2020
Answered: Raynier Suresh on 23 Feb 2021
Since MATLAB 2020a, it now provides a new object network scheme such as SSD(single-shot detector), and YOLO v2
as a form of layer template.
Such templates make it easy to implement some typical detection networks, but they seem to be less flexible.
For example, when I want to implement my own detection network with multiple RPNs (from faster RCNN) that are connected to different conv layers,
MATLAB outputs erros because only one RPN should be included in detection network (faster RCNN).
The relatively new networks such as FPN, RetinaNet should have more flexibility to use multi-scale feature maps from conv layers.
How could I implement Retina Net or feature pyramidal network for object detection by only using deep learning toolbox?

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