What is fractionally-strided convolution layer? Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern) 2019 Moderator Election Q&A - Questionnaire 2019 Community Moderator Election ResultsWhat are deconvolutional layers?What are deconvolutional layers?How do subsequent convolution layers work?How are 1x1 convolutions the same as a fully connected layer?Do all layers have the same computational complexity in a ResNet?Depth of the first pooling layer outcome in tensorflow documentationWhat principle is behind semantic segmenation with CNNs?Understand the shape of this Convolutional Neural NetworkIs color information only extracted in the first input layer of a convolutional neural network?Subsequent convolution layersWhat is the motivation for row-wise convolution and folding in Kalchbrenner et al. (2014)?

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What is fractionally-strided convolution layer?



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern)
2019 Moderator Election Q&A - Questionnaire
2019 Community Moderator Election ResultsWhat are deconvolutional layers?What are deconvolutional layers?How do subsequent convolution layers work?How are 1x1 convolutions the same as a fully connected layer?Do all layers have the same computational complexity in a ResNet?Depth of the first pooling layer outcome in tensorflow documentationWhat principle is behind semantic segmenation with CNNs?Understand the shape of this Convolutional Neural NetworkIs color information only extracted in the first input layer of a convolutional neural network?Subsequent convolution layersWhat is the motivation for row-wise convolution and folding in Kalchbrenner et al. (2014)?










2












$begingroup$


In paper Generating High-Quality Crowd Density Maps using Contextual Pyramid CNNs, in Section 3.4, it said




Since, the aim of this work is to estimate high-resolution and
high-quality density maps, F-CNN is constructed using a set of
convolutional and fractionally-strided convolutional layers. The set
of fractionally-strided convolutional layers help us to restore
details in the output density maps. The following structure is used
for F-CNN: CR(64,9)-CR(32,7)- TR(32)-CR(16,5)-TR(16)-C(1,1), where, C
is convolutional layer, R is ReLU layer, T is fractionally-strided
convolution layer and the first number inside every brace indicates
the number of filters while the second number indicates filter size.
Every fractionally-strided convolution layer increases the input
resolution by a factor of 2, thereby ensuring that the output
resolution is the same as that of input.




I would like to know the detail of fractionally-strided convolution layer.










share|improve this question









New contributor




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







$endgroup$
















    2












    $begingroup$


    In paper Generating High-Quality Crowd Density Maps using Contextual Pyramid CNNs, in Section 3.4, it said




    Since, the aim of this work is to estimate high-resolution and
    high-quality density maps, F-CNN is constructed using a set of
    convolutional and fractionally-strided convolutional layers. The set
    of fractionally-strided convolutional layers help us to restore
    details in the output density maps. The following structure is used
    for F-CNN: CR(64,9)-CR(32,7)- TR(32)-CR(16,5)-TR(16)-C(1,1), where, C
    is convolutional layer, R is ReLU layer, T is fractionally-strided
    convolution layer and the first number inside every brace indicates
    the number of filters while the second number indicates filter size.
    Every fractionally-strided convolution layer increases the input
    resolution by a factor of 2, thereby ensuring that the output
    resolution is the same as that of input.




    I would like to know the detail of fractionally-strided convolution layer.










    share|improve this question









    New contributor




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







    $endgroup$














      2












      2








      2





      $begingroup$


      In paper Generating High-Quality Crowd Density Maps using Contextual Pyramid CNNs, in Section 3.4, it said




      Since, the aim of this work is to estimate high-resolution and
      high-quality density maps, F-CNN is constructed using a set of
      convolutional and fractionally-strided convolutional layers. The set
      of fractionally-strided convolutional layers help us to restore
      details in the output density maps. The following structure is used
      for F-CNN: CR(64,9)-CR(32,7)- TR(32)-CR(16,5)-TR(16)-C(1,1), where, C
      is convolutional layer, R is ReLU layer, T is fractionally-strided
      convolution layer and the first number inside every brace indicates
      the number of filters while the second number indicates filter size.
      Every fractionally-strided convolution layer increases the input
      resolution by a factor of 2, thereby ensuring that the output
      resolution is the same as that of input.




      I would like to know the detail of fractionally-strided convolution layer.










      share|improve this question









      New contributor




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







      $endgroup$




      In paper Generating High-Quality Crowd Density Maps using Contextual Pyramid CNNs, in Section 3.4, it said




      Since, the aim of this work is to estimate high-resolution and
      high-quality density maps, F-CNN is constructed using a set of
      convolutional and fractionally-strided convolutional layers. The set
      of fractionally-strided convolutional layers help us to restore
      details in the output density maps. The following structure is used
      for F-CNN: CR(64,9)-CR(32,7)- TR(32)-CR(16,5)-TR(16)-C(1,1), where, C
      is convolutional layer, R is ReLU layer, T is fractionally-strided
      convolution layer and the first number inside every brace indicates
      the number of filters while the second number indicates filter size.
      Every fractionally-strided convolution layer increases the input
      resolution by a factor of 2, thereby ensuring that the output
      resolution is the same as that of input.




      I would like to know the detail of fractionally-strided convolution layer.







      deep-learning convnet computer-vision convolution






      share|improve this question









      New contributor




      Haha TTpro 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




      Haha TTpro 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 Apr 15 at 6:33









      Esmailian

      3,431420




      3,431420






      New contributor




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









      asked Apr 15 at 3:26









      Haha TTproHaha TTpro

      1134




      1134




      New contributor




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





      New contributor





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






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




















          1 Answer
          1






          active

          oldest

          votes


















          2












          $begingroup$

          Here is an animation of fractionally-strided convolution (from this github project):





          where the dashed white cells are zero rows/columns padded between the input cells (blue). These animations are visualizations of the mathematical formulas from the article below:



          A guide to convolution arithmetic for deep learning



          Here is a quote from the article:




          Figure [..] helps understand what fractional strides involve: zeros
          are inserted between input units, which makes the kernel move around
          at a slower pace than with unit strides [footnote: doing so is
          inefficient and real-world implementations avoid useless
          multiplications by zero, but conceptually it is how the transpose of a
          strided convolution can be thought of.]





          Also, here is a post on this site asking "What are deconvolutional layers?" which is the same thing.



          And here are two quotes from a post by Paul-Louis Pröve on different types of convolutions:




          Transposed Convolutions (a.k.a. deconvolutions or fractionally strided
          convolutions)




          and




          Some sources use the name deconvolution, which is inappropriate
          because it’s not a deconvolution [..] An actual deconvolution reverts the process of a convolution.







          share|improve this answer











          $endgroup$













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            1 Answer
            1






            active

            oldest

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            active

            oldest

            votes






            active

            oldest

            votes









            2












            $begingroup$

            Here is an animation of fractionally-strided convolution (from this github project):





            where the dashed white cells are zero rows/columns padded between the input cells (blue). These animations are visualizations of the mathematical formulas from the article below:



            A guide to convolution arithmetic for deep learning



            Here is a quote from the article:




            Figure [..] helps understand what fractional strides involve: zeros
            are inserted between input units, which makes the kernel move around
            at a slower pace than with unit strides [footnote: doing so is
            inefficient and real-world implementations avoid useless
            multiplications by zero, but conceptually it is how the transpose of a
            strided convolution can be thought of.]





            Also, here is a post on this site asking "What are deconvolutional layers?" which is the same thing.



            And here are two quotes from a post by Paul-Louis Pröve on different types of convolutions:




            Transposed Convolutions (a.k.a. deconvolutions or fractionally strided
            convolutions)




            and




            Some sources use the name deconvolution, which is inappropriate
            because it’s not a deconvolution [..] An actual deconvolution reverts the process of a convolution.







            share|improve this answer











            $endgroup$

















              2












              $begingroup$

              Here is an animation of fractionally-strided convolution (from this github project):





              where the dashed white cells are zero rows/columns padded between the input cells (blue). These animations are visualizations of the mathematical formulas from the article below:



              A guide to convolution arithmetic for deep learning



              Here is a quote from the article:




              Figure [..] helps understand what fractional strides involve: zeros
              are inserted between input units, which makes the kernel move around
              at a slower pace than with unit strides [footnote: doing so is
              inefficient and real-world implementations avoid useless
              multiplications by zero, but conceptually it is how the transpose of a
              strided convolution can be thought of.]





              Also, here is a post on this site asking "What are deconvolutional layers?" which is the same thing.



              And here are two quotes from a post by Paul-Louis Pröve on different types of convolutions:




              Transposed Convolutions (a.k.a. deconvolutions or fractionally strided
              convolutions)




              and




              Some sources use the name deconvolution, which is inappropriate
              because it’s not a deconvolution [..] An actual deconvolution reverts the process of a convolution.







              share|improve this answer











              $endgroup$















                2












                2








                2





                $begingroup$

                Here is an animation of fractionally-strided convolution (from this github project):





                where the dashed white cells are zero rows/columns padded between the input cells (blue). These animations are visualizations of the mathematical formulas from the article below:



                A guide to convolution arithmetic for deep learning



                Here is a quote from the article:




                Figure [..] helps understand what fractional strides involve: zeros
                are inserted between input units, which makes the kernel move around
                at a slower pace than with unit strides [footnote: doing so is
                inefficient and real-world implementations avoid useless
                multiplications by zero, but conceptually it is how the transpose of a
                strided convolution can be thought of.]





                Also, here is a post on this site asking "What are deconvolutional layers?" which is the same thing.



                And here are two quotes from a post by Paul-Louis Pröve on different types of convolutions:




                Transposed Convolutions (a.k.a. deconvolutions or fractionally strided
                convolutions)




                and




                Some sources use the name deconvolution, which is inappropriate
                because it’s not a deconvolution [..] An actual deconvolution reverts the process of a convolution.







                share|improve this answer











                $endgroup$



                Here is an animation of fractionally-strided convolution (from this github project):





                where the dashed white cells are zero rows/columns padded between the input cells (blue). These animations are visualizations of the mathematical formulas from the article below:



                A guide to convolution arithmetic for deep learning



                Here is a quote from the article:




                Figure [..] helps understand what fractional strides involve: zeros
                are inserted between input units, which makes the kernel move around
                at a slower pace than with unit strides [footnote: doing so is
                inefficient and real-world implementations avoid useless
                multiplications by zero, but conceptually it is how the transpose of a
                strided convolution can be thought of.]





                Also, here is a post on this site asking "What are deconvolutional layers?" which is the same thing.



                And here are two quotes from a post by Paul-Louis Pröve on different types of convolutions:




                Transposed Convolutions (a.k.a. deconvolutions or fractionally strided
                convolutions)




                and




                Some sources use the name deconvolution, which is inappropriate
                because it’s not a deconvolution [..] An actual deconvolution reverts the process of a convolution.








                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited Apr 15 at 9:04

























                answered Apr 15 at 6:08









                EsmailianEsmailian

                3,431420




                3,431420




















                    Haha TTpro is a new contributor. Be nice, and check out our Code of Conduct.









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