Angelo Bosco

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The widespread diffusion of hand-held devices with video recording capabilities requires the adoption of reliable Digital Stabilization methods to enjoy the acquired sequences without disturbing jerkiness. In order to effectively get rid of the unwanted camera movements, an estimate of the global motion between adjacent frames is necessary. This paper(More)
We describe an automatic image enhancement technique based on features extraction methods. The approach takes into account images in Bayer data format, captured using a CCD/CMOS sensor and/or 24-bit color images; after identifying the visually significant features, the algorithm adjusts the exposure level using a “camera response”-like function; then a(More)
The proposed paper concerns the processing of images in digital format and, more specifically, particular techniques that can be advantageously used in digital still cameras for improving the quality of images acquired with a non-optimal exposure. The proposed approach analyses the CCD/CMOS sensor Bayer data or the corresponding color generated image and,(More)
BACKGROUND After variceal bleeding, cirrhotic patients should receive secondary prophylaxis. AIM To compare nadolol plus 5-isosorbide mononitrate (5-ISMN) with endoscopic band ligation. The end points were rebleeding, treatment failure and death. METHODS One hundred and nine cirrhotic patients with a recent variceal bleeding were randomized: nadolol(More)
This paper presents a spatial noise reduction technique designed to work on CFA (Color Filtering Array) data acquired by CCD/CMOS image sensors. The overall processing preserves image details using some heuristics related to the HVS (Human Visual System); estimates of local texture degree and noise levels are computed to regulate the filter smoothing(More)
Accurate noise level estimation is essential to assure good performance of noise reduction filters. Noise contaminating raw images is typically modeled as additive white and Gaussian distributed (AWGN); however raw images are affected by a mixture of noise sources that overlap according to a signal dependent noise model. Hence, the assumption of constant(More)
Digital Stabilization is a key element in hand-held imaging devices in that it allows to enjoy the acquired sequences without disturbing jerkiness. In order to effectively remove the unwanted camera movements, it is necessary to estimate the global motion between adjacent frames. This paper presents a novel technique for estimating the global motion between(More)
PURPOSE To discuss the diagnosis, management and outcome of various types of orbital abscess. METHODS The medical records of 13 patients diagnosed and treated for orbital abscess were reviewed. The sources of infection included: paranasal sinusitis (n = 5), odontogenic origin of infection (n = 4), one each, temporal fossa abscess, palatal abscess,(More)