Dynamic Range Flashcards
the method of describing the extent to which a signal can vary and still maintain accuracy
dynamic range
units of dynamic range
dB
does dynamic range increase or decrease the more it processes?
decrease
dynamic range of transducer
120 dB
dynamic range of receiver
100-120 dB
dynamic range of scan converter
40-50 dB
dynamic range of display
20 to 30 dB
dynamic range of archive
10-30 dB
what is the purpose of compression when a signal moves from a receiver to a scan converter
to compress the dynamic range of the signals to avoid error
requirements of compression
largest signal remains the largest
smallest signal remains the smallest
range of signals is reduced
how do we calculate compression
adding or subtracting values
number of possible shades of gray in a display image
dynamic range
what type of images have few shades of gray
bistable images
narrow dynamic range
high contrast
images with more shades of gray
gray scale images
wide dynamic range
low contrast
