In Document and Still Image Coding (editor: M. Barni).
CRC 2005.
Abstract
Digital cameras use solid-state devices as image sensors, formed
by large arrays of photosensitive diodes. During the short period
of time in which the shutter is open, each diode records the intensity
of the light that falls on it by accumulating a charge. This brightness
measurement is then digitized and stored in memory, forming a picture.
Imagine now that we had one particular digital camera with some
rather unusual characteristics:
Besides measuring brightness, diodes can also compute/communicate.
No central storage, diodes store an encoding of the whole image.
Communication among diodes happens over a wireless channel.
Such a "digital camera" is not as contrived an example as it may
seem: this camera is actually a wireless sensor network,
in which nodes observe portions of an image, and then need to cooperate
so that a copy of the entire image can be stored at all sensors.
This chapter considers the problem of distributed compression of
images captured by large sensor arrays.
S. D. Servetto.
Sensing Lena---Massively Distributed Compression of Sensor
Images. In the Proceedings of the IEEE International
Conference on Image Processing (ICIP) (special session on "Distributed
Source Coding"), Barcelona, Spain, September 2003. Invited paper.