Minimum margin loss for deep face recognition

Face recognition has achieved great progress owing to the fast development of the deep neural network in the past a few years. As an important part of deep neural networks, a number of the loss functions have been proposed which significantly improve the state-of-the-art methods. In this paper, we proposed a new loss function called Minimum Margin Loss (MML) which aims at enlarging the margin of those overclose class centre pairs so as to enhance the discriminative ability of the deep features. MML supervises the training process together with the Softmax Loss and the Centre Loss, and also makes up the defect of Softmax + Centre Loss. The experimental results on MegaFace, LFW and YTF datasets show that the proposed method achieves the state-of-the-art performance, which demonstrates the effectiveness of the proposed MML

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The SW-NE-trending Carboneras fault zone of SE Spain separates a terrain comprising uplifted massifs of the metamorphic basement of the Betic Cordilleras and intervening Neogene sedimentary basins, from the Cabo de Gata volcanic series. Along the southeastern boundary of the Carboneras fault, Burdigalian marls and tuffs, mark the beginning of the volcanic episode, rest unconformably on the basement, and were tilted to the vertical during the earliest stages of movement on the fault zone. 40Ar/ 39Ar dating of hornblende grains and igneous clasts from the tuffs constrain the onset of the volcanic episode at 21 Ma, some 4 Ma earlier than previously reported. Volcanic rocks higher in the sequence that overstep unconformably onto the southern edge of the fault zone yielded an age of 11 Ma, thus constraining the earliest episode of motion on the fault zone between these age limits. The main phase of left-lateral strike-slip movement on the Carboneras fault may be later than this time. Movements on more northerly strands of the fault zone, including the uplift of the Sierra Cabrera basement block to the NW, continued at least through Pliocene times. The onset of volcanism is broadlly coeval with the unroofing of the orogen by extensional collapse, and supports earlier inferences of very rapid rates of uplift and cooling of the basement rocks.</p