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From "Mike Dusenberry (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SYSTEMML-1516) Improve output size calculation in conv2d & max_pool2d
Date Wed, 28 Jun 2017 20:00:01 GMT

     [ https://issues.apache.org/jira/browse/SYSTEMML-1516?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mike Dusenberry updated SYSTEMML-1516:
--------------------------------------
    Issue Type: Improvement  (was: Sub-task)
        Parent:     (was: SYSTEMML-618)

> Improve output size calculation in conv2d & max_pool2d
> ------------------------------------------------------
>
>                 Key: SYSTEMML-1516
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1516
>             Project: SystemML
>          Issue Type: Improvement
>            Reporter: Mike Dusenberry
>            Assignee: Mike Dusenberry
>            Priority: Minor
>              Labels: SYSTEMML-618
>             Fix For: SystemML 0.14
>
>
> The calculation of the output sizes (`Hout`, `Wout`) for conv2d and
> max_pool2d layers rely on a flooring operation to only allow for valid
> operations.  Currently, we simply rely on the `as.integer` call to
> implicitly perform this flooring operation during truncation of the double
> to an integer.  While this gives the correct results, it is less
> readable than it should be, and relies on truncation behavior than explicit mathematical
behavior.  We should simply add an explicit `floor`
> operation to each calculation.



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