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subject contrast

   Also found in: Dictionary/thesaurus, Legal, Financial, Encyclopedia, Wikipedia 0.01 sec.
subject contrast,
the difference in x-ray beam intensities across the beam area after emerging from the part being radiographed.

subject
an animal subjected to treatment, observation or experiment.

subject contrast
the difference in relative densities within the subject as distinct from the differences between the subject and the surroundings.


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All available shutter speeds are flash-synchronized, which give pros a considerable advantage when working in daylight or for filling in shadows and strong subject contrasts.
High-Precision 3-Point Smart Autofocus System Canon's complete line of Sure Shot u-Series cameras uses a 3-point passive Smart autofocus system that detects differences in subject contrast to determine proper focus on a subject and uses a CMOS sensor that switches between seven specific points in three stages based on the zoom position of the lens for more precise focusing.
High-Precision 3-Point AIAF Autofocus System The Sure Shot 130u uses a 3-point passive autofocus system that detects differences in subject contrast to determine proper focus on a subject and uses a CMOS photocell that switches between seven specific points in three stages based on the zoom position of the lens for more precise focusing.
 
 
 
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