yzhao062/pyod

AutoEncoder does not generate a symmetric model

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#138 建立於 2019年11月3日

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 (3 留言) (0 反應) (0 負責人)Python (7,762 star) (1,308 fork)batch import
bughelp wanted

描述

Hi,

I plotted the model when printing the model summary: https://github.com/yzhao062/pyod/blob/da68f50ee79bd74777d2d406cac6dcfad412e599/pyod/models/auto_encoder.py#L187

And it seems that you added an extra layer at the beginning with the same dimension as the input. I don't know why this is required because it would generate an asymmetric model. Here is the model I printed out:

model

The final dimension would be like 645-645-100-100-500-9-500-100-100-645.

I think the problem might be caused by this line: https://github.com/yzhao062/pyod/blob/da68f50ee79bd74777d2d406cac6dcfad412e599/pyod/models/auto_encoder.py#L224

The performance is similar after I commented out the above line.

Please correct me if I miss something! Thanks!

貢獻者指南

技術棧
pythontensorflow
領域
machine learning
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
2
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
under 1 hour
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
Basic knowledge of autoencodersPython programming
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
80
研究方向
Investigate the autoencoder model construction in pyod/models/auto encoder.py, specifically around lines 187 and 224. The issue suggests that an extra layer with the same dimension as input causes asymmetry. The fix may be to remove or adjust that layer. Review the model summary and confirm the symmetry after modification.