Fig. 8.

PCA reduced FV-CNN. The figure reports the performance of VGG-M (left) and VGG-VD (right) local descriptors, on PASCAL VOC 2007, when reducing their dimensionality from 512 to up to 32 using PCA in combination with a variable number of GMM components. The horizontal axis report the total descriptor dimensionality, proportional to the dimensionality of the local descriptors by the number of GMM components