The ability to see behind flames is a key challenge for the industrial field and particularly for the safety field. Development of new technologies to detect live people through smoke and flames in fire scenes is an extremely desirable goal since it can save human lives. The latest technologies, including equipment adopted by fire departments, use infrared bolometers for infrared digital cameras that allow users to see through smoke. However, such detectors are blinded by flame-emitted radiation. Here we show a completely different approach that makes use of lensless digital holography technology in the infrared range for successful imaging through smoke and flames. Notably, we demonstrate that digital holography with a cw laser allows the recording of dynamic human-size targets. In this work, easy detection of live, moving people is achieved through both smoke and flames, thus demonstrating the capability of digital holography at 10.6 μm.
Over the past few decades, analytical methods developed in the physical sciences started to contribute to the analysis, conservation, and dissemination of works of art. By focusing on the visual arts, this paper sketches the main applications that could benefit from the introduction of ad hoc image processing tools, outlines the state-of-the-art, describes the main peculiarities of this field, and discusses the main obstacles impeding a more fruitful cooperation between the image processing community and art historians, restorers, and artists in general
This paper presents an overview of a number of diagnostic campaigns carried out to assess the conservation state of paintings. The specific characteristics required in cultural heritage applications have been investigated and are reported, where two main fields are considered: radiometric analyses using multispectral images and 3D surveying for geometric deformation analysis by means of photogrammetry and laser scanning. The activities described were accomplished in interdisciplinary teams, composed of photogrammetrists, art‐historians, restorers and experts of non‐destructive diagnostic techniques.
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