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YOLO v3 complete architecture



2019 Community Moderator ElectionHow is the number of grid cells in YOLO determined?How does YOLO algorithm detect objects if the grid size is way smaller than the object in the test image?Last layers of YOLOHow to implement YOLO in my CNN model?Add training data to YOLO post-trainingBounding Boxes in YOLO ModelYOLO layers sizeYOLO pretrainingYOLO algorithm - understanding training dataWhy not use the anchor boxes for the grid based search to detect objects directly in YOLO algorithm?










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$begingroup$


I am attempting to implement YOLO v3 in Tensorflow-Keras from scratch, with the aim of training my own model on a custom dataset. By that, I mean without using pretrained weights. I have gone through all three papers for YOLOv1, YOLOv2(YOLO9000) and YOLOv3, and find that although Darknet53 is used as a feature extractor for YOLOv3, I am unable to point out the complete architecture which extends after that - the "detection" layers talked about here. After a lot of reading on blog posts from Medium, kdnuggets and other similar sites, I ended up with a few significant questions:



  • Have I have missed the complete architecture of the detection layers (that extend after Darknet53 used for feature extraction) in YOLOv3 paper somewhere?

  • The author seems to use different image sizes at different stages of training. Does the network automatically do this upscaling/downscaling of images?

  • For preprocessing the images, is it really just enough to resize them and then normalize it (dividing by 255)?

Please be kind enough to point me in the right direction. I appreciate the help!










share|improve this question











$endgroup$
















    1












    $begingroup$


    I am attempting to implement YOLO v3 in Tensorflow-Keras from scratch, with the aim of training my own model on a custom dataset. By that, I mean without using pretrained weights. I have gone through all three papers for YOLOv1, YOLOv2(YOLO9000) and YOLOv3, and find that although Darknet53 is used as a feature extractor for YOLOv3, I am unable to point out the complete architecture which extends after that - the "detection" layers talked about here. After a lot of reading on blog posts from Medium, kdnuggets and other similar sites, I ended up with a few significant questions:



    • Have I have missed the complete architecture of the detection layers (that extend after Darknet53 used for feature extraction) in YOLOv3 paper somewhere?

    • The author seems to use different image sizes at different stages of training. Does the network automatically do this upscaling/downscaling of images?

    • For preprocessing the images, is it really just enough to resize them and then normalize it (dividing by 255)?

    Please be kind enough to point me in the right direction. I appreciate the help!










    share|improve this question











    $endgroup$














      1












      1








      1





      $begingroup$


      I am attempting to implement YOLO v3 in Tensorflow-Keras from scratch, with the aim of training my own model on a custom dataset. By that, I mean without using pretrained weights. I have gone through all three papers for YOLOv1, YOLOv2(YOLO9000) and YOLOv3, and find that although Darknet53 is used as a feature extractor for YOLOv3, I am unable to point out the complete architecture which extends after that - the "detection" layers talked about here. After a lot of reading on blog posts from Medium, kdnuggets and other similar sites, I ended up with a few significant questions:



      • Have I have missed the complete architecture of the detection layers (that extend after Darknet53 used for feature extraction) in YOLOv3 paper somewhere?

      • The author seems to use different image sizes at different stages of training. Does the network automatically do this upscaling/downscaling of images?

      • For preprocessing the images, is it really just enough to resize them and then normalize it (dividing by 255)?

      Please be kind enough to point me in the right direction. I appreciate the help!










      share|improve this question











      $endgroup$




      I am attempting to implement YOLO v3 in Tensorflow-Keras from scratch, with the aim of training my own model on a custom dataset. By that, I mean without using pretrained weights. I have gone through all three papers for YOLOv1, YOLOv2(YOLO9000) and YOLOv3, and find that although Darknet53 is used as a feature extractor for YOLOv3, I am unable to point out the complete architecture which extends after that - the "detection" layers talked about here. After a lot of reading on blog posts from Medium, kdnuggets and other similar sites, I ended up with a few significant questions:



      • Have I have missed the complete architecture of the detection layers (that extend after Darknet53 used for feature extraction) in YOLOv3 paper somewhere?

      • The author seems to use different image sizes at different stages of training. Does the network automatically do this upscaling/downscaling of images?

      • For preprocessing the images, is it really just enough to resize them and then normalize it (dividing by 255)?

      Please be kind enough to point me in the right direction. I appreciate the help!







      keras tensorflow object-detection object-recognition yolo






      share|improve this question















      share|improve this question













      share|improve this question




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      edited Mar 28 at 3:18







      hridayns

















      asked Mar 28 at 3:09









      hridaynshridayns

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