Expanded Object Localization Learning Data Generation Using CAM and Selective Search and Its Retraining to Improve WSOL Performance


KIPS Transactions on Software and Data Engineering, Vol. 10, No. 9, pp. 349-358, Sep. 2021
https://doi.org/10.3745/KTSDE.2021.10.9.349,   PDF Download:
Keywords: WSOL(Weakly Supervised Object Localization), CAM(Class Activation Map), Selective Search, localization
Abstract

Recently, a method of finding the attention area or localization area for an object of an image using CAM (Class Activation Map)[1] has been variously carried out as a study of WSOL (Weakly Supervised Object Localization). The attention area extraction from the object heat map using CAM has a disadvantage in that it cannot find the entire area of the object by focusing mainly on the part where the features are most concentrated in the object. To improve this, using CAM and Selective Search[6] together, we first expand the attention area in the heat map, and a Gaussian smoothing is applied to the extended area to generate retraining data. Finally we train the data to expand the attention area of the objects. The proposed method requires retraining only once, and the search time to find an localization area is greatly reduced since the selective search is not needed in this stage. Through the experiment, the attention area was expanded from the existing CAM heat maps, and in the calculation of IOU (Intersection of Union) with the ground truth for the bounding box of the expanded attention area, about 58% was improved compared to the existing CAM.


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Cite this article
[IEEE Style]
S. Go and Y. Choi, "Expanded Object Localization Learning Data Generation Using CAM and Selective Search and Its Retraining to Improve WSOL Performance," KIPS Transactions on Software and Data Engineering, vol. 10, no. 9, pp. 349-358, 2021. DOI: https://doi.org/10.3745/KTSDE.2021.10.9.349.

[ACM Style]
Sooyeon Go and Yeongwoo Choi. 2021. Expanded Object Localization Learning Data Generation Using CAM and Selective Search and Its Retraining to Improve WSOL Performance. KIPS Transactions on Software and Data Engineering, 10, 9, (2021), 349-358. DOI: https://doi.org/10.3745/KTSDE.2021.10.9.349.