Patent ID: 7475823

Claim:
An imaging-based portable reader for reading a target comprising: a) an imaging and decoding system for imaging a target image and if present decoding a target bar code, the imaging and decoding system including focusing optics and a sensor array, the focusing optics defining a field of view and focusing reflected illumination from an image onto the sensor array; and b) a monitor for determining if the portable reader is stationary, in a fixed mount mode, or moving with respect to the target, and said imaging and decoding system responds to the monitor by adjusting an exposure period in situations wherein said portable reader is stationary, in a fixed mount mode, or moving with respect to the target such that a first exposure period is provided when said monitor determines that the portable reader is in one of a stationary and fixed mount mode and a second exposure period when said monitor determines that said portable reader is moving, the second exposure period being shorter in duration than said first exposure period to reduce image distortion and/or noise.