CHEETAH Hardware User’s Manual
Imperx, Inc.
Rev. 2.0.7
6421 Congress Ave.
7/7/2015
Boca Raton, FL 33487
+1 (561) 989-0006
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Wide Dynamic Range mode is available in global shutter mode only and
allows the user to compress bright regions of the image into the available
output range. The camera allows the user to select from three user defined
exposure periods depending upon the brightness of each individual pixel.
See Figure 5.14.
Figure 5.14: Wide Dynamic Range Controls
WDR:
Wide Dynamic Range (WDR) [also Extended
Dynamic Range] can be enabled or disabled using the Enable
check box.
The overall exposure period (Texp) is set using the Exposure
control slider. (See Section 5.7.1.2 Exposure Controls) Pixels in
the dark regions of the image area will collect charge through-out
the entire exposure period.
E1:
Exposure period for ‘Bright’ pixels E1 can be set with the
slider or input directly. E1 must be some fraction of the overall
exposure period as defined by the Exposure setting. Bright pixels
are exposed for Texp – E1. See section 5.7.1.2 Exposure
Controls.
E2:
Exposure Period for Very Bright pixels. Can be set with
slider or input directly. Very Bright pixel exposure is Texp - E2.
E2 must be some fraction of Texp and must be greater than E1.
E3:
Exposure Period for Ultra Bright pixels. Can be set with
slider or input directly. Ultra-Bright pixel exposure is Texp - E3.
E3 must be some fraction Texp and greater than of E2.
P1:
Percentage of camera output assigned to Dark pixels. Select
from 15% to 100% in 5% steps. Normal setting is 30% to 70%.
