François Berry

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We describe a spatio-temporal triangulation method to be used with rolling shutter cameras. We show how a single pair of rolling shutter images enables the computation of both structure and motion of rigid moving objects. Starting from a set of point correspondences in the left and right images, we introduce the velocity and shutter characteristics in the(More)
We introduce CAPH, a new domain-specific language (DSL) suited to the implementation of stream-processing applications on field programmable gate arrays (FPGA). \caph relies upon the actor/dataflow model of computation. Applications are described as networks of purely dataflow actors exchanging tokens through unidirectional channels. The behavior of each(More)
In visual servoing, most studies are concerned with robotic application with known objects. In this paper, the problem of controlling a motion by visual servoing around an unknown object is addressed. In this case, the approach is interpreted as an initial step towards a perception goal of an unmodeled object. The main goal is to perform motion with regard(More)
Processing images to extract useful information in real-time is a complex task, dealing with large amounts of iconic data and requiring intensive computation. Smart cameras use embedded processing to save the host system from the low-level processing load and to reduce communication flows and overheads. Field programmable devices present special interest(More)
In computer vision and more particularly in vision processing, the impressive evolution of algorithms and the emergence of new techniques dramatically increase algorithm complexity. In this paper, a novel FPGA-based architecture dedicated to active vision (and more precisely early vision) is proposed. Active vision appears as an alternative approach to deal(More)
In this paper, a novel architecture dedicated to image processing is presented. The most original aspect of the approach is the use of a high density FPGA to build a versatile embedded smart camera. We show the main advantages of such a system based on a CMOS imaging device and a programmable chip. With its structure, the system proposes a high degree of(More)
Due to the various devices composing a smart camera system, various languages have to be known by the designer (like HDL and C/C++). Most of vision applications designers are software programmers and do not have a good knowledge of HDLs (VHDL). This paper presents a new high-level methodology for implementing vision applications on smart camera platforms.(More)
DreamCam is a modular smart camera constructed with the use of an FPGA like main processing board. The core of the camera is an Altera Cyclone-III associated with a CMOS imager and six private Ram blocks. The main novel feature of our work consists in proposing a new smart camera architecture and several modules (IP) to efficiently extract and sort the(More)