Term
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Definition
A method of describing the extent to which a signal can vary and still maintain accuracy
"The number of available choices"; also indicates number of gray shades
Measured in dB
Processing decreases quality
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Term
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Definition
| From threshold signal strength (minimum) to saturation signal strength (maximum) |
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Term
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Definition
Fewer gray shades
aka high contrast |
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Term
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Definition
Many shades of gray
aka low contrast |
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Term
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Definition
| An image that contains only black and white shades |
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Term
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Definition
| Image that contains many shades of gray |
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Term
| Calculating Dynamic Range |
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Definition
- Divide larger number by smaller number
- Count the zeroes in the result
- Each zero represents 20 dB
Volts are part of equation |
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Term
| Compression of Dynamic Range |
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Definition
Potential errors with system components with varying DR's
Also human eye DR
Largest signal remains largest
Smallest remains smallest
Range of signals is reduced
Sonographer can adjust |
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