Recently Light Emitting Diodes (LEDs) are considered to represent the next generation of lighting and communication technology. LED-ID (Light Emitting Diode – Identification) is one of the key technologies for identification, data... more
Recently Light Emitting Diodes (LEDs) are considered to represent the next generation of lighting and communication technology. LED-ID (Light Emitting Diode – Identification) is one of the key technologies for identification, data transmission and illumination simultaneously. This is the new paradigm in the identification technology environment. LED-ID system typically needs line of sight (LOS) to support narrow FOV transceivers links to achieve high data rate but reduced the coverage, increase the disconnection rate of the link. Also when the receiver moves horizontally or vertically, in that case coverage also varied and LOS relies upon direct link between transmitter and receiver. Link recovery is a new challenge for reliable LED-ID system. Fast link recovery techniques are essential for the making the system robust. In this paper we discuss about the horizontal and vertical coverage variation in terms of received power and fast link recovery technique for the LED-ID system considering both LOS and NLOS reflection.
Locating the optic disc center and the fovea in digital fundus images is surprisingly difficult due to the variation range in color and contrast and the possible presence of pathologies creating bright spots or changing the appearance... more
Locating the optic disc center and the fovea in digital fundus images is surprisingly difficult due to the variation range in color and contrast and the possible presence of pathologies creating bright spots or changing the appearance of retinal landmarks. These reasons make it difficult to find good templates of optic disc and fovea shape and color for pattern matching.
