Publication

Segmentation-aware deformable part models

Conference Article

Conference

IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)

Edition

2014

Pages

168-175

Doc link

http://dx.doi.org/10.1109/CVPR.2014.29

File

Download the digital copy of the doc pdf document

Abstract

In this work we propose a technique to combine bottom- up segmentation, coming in the form of SLIC superpixels, with sliding window detectors, such as Deformable Part Models (DPMs).
The merit of our approach lies in ‘cleaning up’ the low-level HOG features by exploiting the spatial support of SLIC superpixels; this can be understood as using segmentation to split the feature variation into object-specific and background changes. Rather than committing to a single segmentation we use a large pool of SLIC superpixels and combine them in a scale-, position- and object-dependent manner to build soft segmentation masks. The segmentation masks can be computed fast enough to repeat this process over every candidate window, during training and detection, for both the root and part filters of DPMs.
We use these masks to construct enhanced, background-invariant features to train DPMs. We test our approach on the PASCAL VOC 2007, outperforming the standard DPM in 17 out of 20 classes, yielding an average increase of 1.7% AP. Additionally, we demonstrate the robustness of this approach, extending it to dense SIFT descriptors for large displacement optical flow.

Categories

computer vision, object recognition.

Scientific reference

E. Trulls Fortuny, S. Tsogkas, I. Kokkinos, A. Sanfeliu and F. Moreno-Noguer. Segmentation-aware deformable part models, 2014 IEEE/CVF Conference on Computer Vision and Pattern Recognition, 2014, Columbus, pp. 168-175.