An extremely compact JPEG encoder for adaptive embedded systems

JPEG Encoding is a commonly performed application that is also very process and memory intensive, and not suited for low-power embedded systems with narrow data buses and small amounts of memory. An embedded system may also need to adapt its application in order to meet varying system constraints such as power, energy, time or bandwidth. We present here an extremely compact JPEG encoder that uses very few system resources, and which is capable of dynamically changing its Quality of Service (QoS) on the fly. The application was tested on a NIOS II core, AVR, and PIC24 microcontrollers with excellent results.