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YOLO: What is better? multiple networks per label or multiple labels in single network?



The 2019 Stack Overflow Developer Survey Results Are InAny differences in regularisation in MLP between batch and individual updates?In Neural Networks and deep neural networks what does label-dropout meanBatching in Recurrent Neural Networks (RNNs) when there is only a single instance per time step?What is the way to modify a neural network classifier to deal with sample points from outside of the label set?










1












$begingroup$


I would like to use a YOLO network, retrain it to recognize say, 20 labels.



Would adding labels to a single network in training reduce its accurary?



Would it be better to train multiple models on 5,10 and 5 labels respectively.



e.g.



Model A : recognizes 5 labels (ferrari,honda,ford,toyota,tesla)
Model B : regonzies 10 labels (store front / stopsign, speed sign, super charger station , etccc. )
Model C : recongizes 5 labels (pedestrian, dog, marathon runner, bicycler, scooter rider)


OR



Model D: Recognizes 20 labels (all labels above put together)


Would Model D be as accurate as Model A,B,C put together?










share|improve this question









New contributor




Ryu S. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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$endgroup$
















    1












    $begingroup$


    I would like to use a YOLO network, retrain it to recognize say, 20 labels.



    Would adding labels to a single network in training reduce its accurary?



    Would it be better to train multiple models on 5,10 and 5 labels respectively.



    e.g.



    Model A : recognizes 5 labels (ferrari,honda,ford,toyota,tesla)
    Model B : regonzies 10 labels (store front / stopsign, speed sign, super charger station , etccc. )
    Model C : recongizes 5 labels (pedestrian, dog, marathon runner, bicycler, scooter rider)


    OR



    Model D: Recognizes 20 labels (all labels above put together)


    Would Model D be as accurate as Model A,B,C put together?










    share|improve this question









    New contributor




    Ryu S. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.







    $endgroup$














      1












      1








      1





      $begingroup$


      I would like to use a YOLO network, retrain it to recognize say, 20 labels.



      Would adding labels to a single network in training reduce its accurary?



      Would it be better to train multiple models on 5,10 and 5 labels respectively.



      e.g.



      Model A : recognizes 5 labels (ferrari,honda,ford,toyota,tesla)
      Model B : regonzies 10 labels (store front / stopsign, speed sign, super charger station , etccc. )
      Model C : recongizes 5 labels (pedestrian, dog, marathon runner, bicycler, scooter rider)


      OR



      Model D: Recognizes 20 labels (all labels above put together)


      Would Model D be as accurate as Model A,B,C put together?










      share|improve this question









      New contributor




      Ryu S. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.







      $endgroup$




      I would like to use a YOLO network, retrain it to recognize say, 20 labels.



      Would adding labels to a single network in training reduce its accurary?



      Would it be better to train multiple models on 5,10 and 5 labels respectively.



      e.g.



      Model A : recognizes 5 labels (ferrari,honda,ford,toyota,tesla)
      Model B : regonzies 10 labels (store front / stopsign, speed sign, super charger station , etccc. )
      Model C : recongizes 5 labels (pedestrian, dog, marathon runner, bicycler, scooter rider)


      OR



      Model D: Recognizes 20 labels (all labels above put together)


      Would Model D be as accurate as Model A,B,C put together?







      neural-network image-recognition yolo






      share|improve this question









      New contributor




      Ryu S. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question









      New contributor




      Ryu S. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      share|improve this question




      share|improve this question








      edited 9 hours ago









      pcko1

      1,666418




      1,666418






      New contributor




      Ryu S. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      asked 13 hours ago









      Ryu S.Ryu S.

      62




      62




      New contributor




      Ryu S. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





      New contributor





      Ryu S. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






      Ryu S. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.




















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          $begingroup$

          It depends specially on data size and model capacity.



          1. If the number of data points per category is insufficient, which is frequently the case in reality, a single model for combined categories performs better, since the effect of data shortage will be attenuated by sharing a model among different but related tasks, i.e. shared knowledge. However, we should not forget about the capacity of model, if model capacity is not enough for the combined task, this sharing would backfire as the model spreads its limited capacity across multiple tasks and becomes "jack of all trades, and master of none". Therefore, this approach is favorable if model capacity permits, which is less of a concern for neural networks with flexible size constraints.


          2. If the number of data points per category is sufficient, which is rarely the case, or model capacity is limited (for example, when model performance stops improving when trained on more than 10% of data), single model per category is better since no capacity will be wasted on different (although related) tasks. From a different point of view, although this choice might be less favorable in terms of model accuracy, but it allows parallel development on smaller tasks, i.e. faster production, which could be a justified benefit for the cost we pay in terms of model accuracy.


          We can also combine the two approaches, which could be more time-consuming than both. First we train a model on combined categories, then we feed a part (or parts) of the trained model (such as a layer, the final prediction, etc.) to a specific model that will be trained on one category. This is exactly what a pre-trained model does for us, it is trained on a more general task with more data (possibly even a different but related task), and then we use it for a specific task.






          share|improve this answer









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            1 Answer
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            active

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            active

            oldest

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            0












            $begingroup$

            It depends specially on data size and model capacity.



            1. If the number of data points per category is insufficient, which is frequently the case in reality, a single model for combined categories performs better, since the effect of data shortage will be attenuated by sharing a model among different but related tasks, i.e. shared knowledge. However, we should not forget about the capacity of model, if model capacity is not enough for the combined task, this sharing would backfire as the model spreads its limited capacity across multiple tasks and becomes "jack of all trades, and master of none". Therefore, this approach is favorable if model capacity permits, which is less of a concern for neural networks with flexible size constraints.


            2. If the number of data points per category is sufficient, which is rarely the case, or model capacity is limited (for example, when model performance stops improving when trained on more than 10% of data), single model per category is better since no capacity will be wasted on different (although related) tasks. From a different point of view, although this choice might be less favorable in terms of model accuracy, but it allows parallel development on smaller tasks, i.e. faster production, which could be a justified benefit for the cost we pay in terms of model accuracy.


            We can also combine the two approaches, which could be more time-consuming than both. First we train a model on combined categories, then we feed a part (or parts) of the trained model (such as a layer, the final prediction, etc.) to a specific model that will be trained on one category. This is exactly what a pre-trained model does for us, it is trained on a more general task with more data (possibly even a different but related task), and then we use it for a specific task.






            share|improve this answer









            $endgroup$

















              0












              $begingroup$

              It depends specially on data size and model capacity.



              1. If the number of data points per category is insufficient, which is frequently the case in reality, a single model for combined categories performs better, since the effect of data shortage will be attenuated by sharing a model among different but related tasks, i.e. shared knowledge. However, we should not forget about the capacity of model, if model capacity is not enough for the combined task, this sharing would backfire as the model spreads its limited capacity across multiple tasks and becomes "jack of all trades, and master of none". Therefore, this approach is favorable if model capacity permits, which is less of a concern for neural networks with flexible size constraints.


              2. If the number of data points per category is sufficient, which is rarely the case, or model capacity is limited (for example, when model performance stops improving when trained on more than 10% of data), single model per category is better since no capacity will be wasted on different (although related) tasks. From a different point of view, although this choice might be less favorable in terms of model accuracy, but it allows parallel development on smaller tasks, i.e. faster production, which could be a justified benefit for the cost we pay in terms of model accuracy.


              We can also combine the two approaches, which could be more time-consuming than both. First we train a model on combined categories, then we feed a part (or parts) of the trained model (such as a layer, the final prediction, etc.) to a specific model that will be trained on one category. This is exactly what a pre-trained model does for us, it is trained on a more general task with more data (possibly even a different but related task), and then we use it for a specific task.






              share|improve this answer









              $endgroup$















                0












                0








                0





                $begingroup$

                It depends specially on data size and model capacity.



                1. If the number of data points per category is insufficient, which is frequently the case in reality, a single model for combined categories performs better, since the effect of data shortage will be attenuated by sharing a model among different but related tasks, i.e. shared knowledge. However, we should not forget about the capacity of model, if model capacity is not enough for the combined task, this sharing would backfire as the model spreads its limited capacity across multiple tasks and becomes "jack of all trades, and master of none". Therefore, this approach is favorable if model capacity permits, which is less of a concern for neural networks with flexible size constraints.


                2. If the number of data points per category is sufficient, which is rarely the case, or model capacity is limited (for example, when model performance stops improving when trained on more than 10% of data), single model per category is better since no capacity will be wasted on different (although related) tasks. From a different point of view, although this choice might be less favorable in terms of model accuracy, but it allows parallel development on smaller tasks, i.e. faster production, which could be a justified benefit for the cost we pay in terms of model accuracy.


                We can also combine the two approaches, which could be more time-consuming than both. First we train a model on combined categories, then we feed a part (or parts) of the trained model (such as a layer, the final prediction, etc.) to a specific model that will be trained on one category. This is exactly what a pre-trained model does for us, it is trained on a more general task with more data (possibly even a different but related task), and then we use it for a specific task.






                share|improve this answer









                $endgroup$



                It depends specially on data size and model capacity.



                1. If the number of data points per category is insufficient, which is frequently the case in reality, a single model for combined categories performs better, since the effect of data shortage will be attenuated by sharing a model among different but related tasks, i.e. shared knowledge. However, we should not forget about the capacity of model, if model capacity is not enough for the combined task, this sharing would backfire as the model spreads its limited capacity across multiple tasks and becomes "jack of all trades, and master of none". Therefore, this approach is favorable if model capacity permits, which is less of a concern for neural networks with flexible size constraints.


                2. If the number of data points per category is sufficient, which is rarely the case, or model capacity is limited (for example, when model performance stops improving when trained on more than 10% of data), single model per category is better since no capacity will be wasted on different (although related) tasks. From a different point of view, although this choice might be less favorable in terms of model accuracy, but it allows parallel development on smaller tasks, i.e. faster production, which could be a justified benefit for the cost we pay in terms of model accuracy.


                We can also combine the two approaches, which could be more time-consuming than both. First we train a model on combined categories, then we feed a part (or parts) of the trained model (such as a layer, the final prediction, etc.) to a specific model that will be trained on one category. This is exactly what a pre-trained model does for us, it is trained on a more general task with more data (possibly even a different but related task), and then we use it for a specific task.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered 10 hours ago









                EsmailianEsmailian

                2,921319




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                    ValueError: Expected n_neighbors <= n_samples, but n_samples = 1, n_neighbors = 6 (SMOTE) The 2019 Stack Overflow Developer Survey Results Are InCan SMOTE be applied over sequence of words (sentences)?ValueError when doing validation with random forestsSMOTE and multi class oversamplingLogic behind SMOTE-NC?ValueError: Error when checking target: expected dense_1 to have shape (7,) but got array with shape (1,)SmoteBoost: Should SMOTE be ran individually for each iteration/tree in the boosting?solving multi-class imbalance classification using smote and OSSUsing SMOTE for Synthetic Data generation to improve performance on unbalanced dataproblem of entry format for a simple model in KerasSVM SMOTE fit_resample() function runs forever with no result