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The problem of large-scale image search has been traditionally addressed with the bag-of-visual-words (BOV). In this article, we propose to use as an alternative the Fisher kernel framework. We first show why the Fisher representation is well-suited to the retrieval problem: it describes an image by what makes it different from other images. One drawback of(More)
The purpose of this study was to determine whether physicians practicing in one type of setting manage a medical problem differently than those practicing in another type of setting. The investigation took the form of presenting physicians with a simulated case of tension headache with a history going back three years, for which diazepam had been taken(More)
We address the problem of large-scale topic classification of web pages based on the minimal text available in the URLs. This problem is challenging because of the sparsity of feature vectors that are derived from the URL text, and the typical asymmetry between the cardinality of train and test sets due to non-availability of sufficient sets of annotated(More)
This article targets the problem of vehicle classification using laser scanner profiles, which is usually found as a component of electronic tolling systems. Laser scanners obtain a 3D measurement of the vehicle surface. Previous approaches have extracted high-level features (such as width, height, length and other measurements) from the scanner profiles,(More)
Fifty-eight realignment operations for dislocation or subluxation of the extensor mechanism are described. Patellectomy was combined with realignment in 14. Thirty-five of the 44 patients (80 per cent) in whom the patella was retained also had chondromalacia patellae, which improved after realignment in 26 (74 per cent) without shaving or drilling of the(More)
We submit two case reports of apical hypertrophic cardiomyopathy knowing that the diagnosis of one of them has been very intricate at the time of preoperative evaluation. This disease, unfrequent besides Japan, is either silent or induces cardio-vascular symptoms which are often poorly typical. The diagnosis relies on echocardiography using a high frequency(More)
We introduce a novel algorithm for local contrast enhancement. The algorithm exploits a background image which is estimated with an edge-preserving filter. The background image controls a gain which enhances important details hidden in underexposed regions of the input image. Our designs for the gain, edge-preserving filter and chrominance recovery avoid(More)
Bwmm 277 tissue does not normally occur (Davis et al., 1955). This stipulation is necessary, since benign tumours have a multifocal origin in approximately 10% of cases, but in such cases tumour cells are confined to tissues which normally contain chromaffin elements. Case 1 was regarded as malignant because phaeo-chromocytoma cells were found in a lymph(More)