Effective high resolution 3D geometric reconstruction of heritage and archaeological sites from images

Motivated by the need for a fast, accurate, and high-resolution approach to documenting heritage and archaeological objects before they are removed or destroyed, the goal of this paper is to develop and demonstrate advanced image-based techniques to capture the fine 3D geometric details of such objects. The size of the object may be large and of any arbitrary shape which presents a challenge to all existing 3D techniques. Although range sensors can directly acquire high resolution 3D points, they can be costly and impractical to set up and move around archaeological sites. Alternatively, image-based techniques acquire data from inexpensive portable digital cameras. We present a sequential multi-stage procedure for 3D data capture from images designed to model fine geometric details. Test results demonstrate the utility and flexibility of the technique and prove that it creates highly detailed models in a reliable manner for many different types of surface detail

ODAE: Optical Device for Absolute Encoder

The design and the realisation of a photodiode array to be used for decoding the code wheel of an 13 bits absolute rotary encoder is reported. ODAE, contains two photodiode arrays placed orthogonal to each other, readout and control electronics as well as a serial interface for calibration. light generated by a high performance optical emitter pass through a glass wheel on which the digital code, representing the position, is impressed. ODAE is placed beyond the wheel and converts the dark and bright pattern into a digital output. The chip has been fabricated in a 1.2um CMOS process and measured 9170um x 3440u

CMOS Vision Sensors for Specific Applications

The need of process and quality control in many industrial fields is requiring the development of optical sensors taylored for specific applications. These sensors must be potentially low cost and possibly should integrate on the same die signal processing capabilities. Standard CMOS technology is therefore the technology to choose for satisfying these requirements. Two examples of application specific vision sensor are presented in this paper. The first is a focal plane array with very high dynamic range for the automotive industry, and the latter is a linear array with on board processing for a triangulation based 3D laser scanne

CMOS Vision Sensors for Specific Applications

none2The need of process and quality control in many industrial fields is requiring the development of optical sensors taylored for specific applications. These sensors must be potentially low cost and possibly shoud integrate on the same die signal processing capabilities. Standard CMOS technology is therefore the technology of choose for satisfying these requirements. Two examples of application specific visin sensor are presented in this paper. The first is a focal plane array with very high dynamic range for the automotive industry, and the latter is a linear array with on board processing for a triangulation based 3D laser scannerL. Gonzo; A. SimoniGonzo, Lorenzo; Simoni, Andre

Activity monitoring for elderly in home environment: advantages of 3D vision sensors

Activity monitoring, especially for the elderly, are important not only for the health aspects regarding the assisted people, but also for social advantages (prevention, protection, care‑giver institution services, etc.). Emerging sensing technologies allow sensible improvement in activity recognition and data processing, reducing false alarms and detection algorithms complexity. Advantages of 3D vision systems for indoor non-invasive activity monitoring are presented. The analysis are conducted considering the development of a robust and automatic fall detector, one of the major public health problems for the elderly, and could be extended to different AAL applications

A digitally enhanced resolution technique for rotary encoder systems

none4F. Cherchi; L. Gonzo; V. Liberali; G. TorelliF., Cherchi; L., Gonzo; Liberali, Valentino; Torelli, Guid