Operating Guide 46
Antelope Camera Systems
4.17 Gamma Presets Button
Gamma correction function is used to correct image's luminance. It is a nonlinear operation used by
the camera to convert the brightness values in imagery. This non-linearity must be compensated in
order to achieve a correct reproduction of luminance.
Push the Gamma button (G) to switch to the gamma presets menu.
Note! - If you keep the Gamma button (G) pressed a graphic of the currently set gamma curve
is shown on the display.
In the gamma selection menu you can change the camera`s gamma curve. Select the respective
item by turning the Select dial (Q), then press the Select dial (Q) once. The arrow indicates the
active item. By turning the Select dial (Q) you change the settings. Confirm your settings by
pressing the Select dial (Q) once.
Mode
Values are
Off - no gamma correction is applied. -> linear gamma
REC709 - Choose REC709 mode if the camera is used in a standard HDTV environment.
HLG - Choose hybrid log-gamma if the camera is used in a high dynamic range (HDR)
environment.
Gamma
Gamma correction function is used to correct image's luminance.
Values range from 0,75 - 0,25
Note! - the Gamma values are only changeable in REC 709 mode, in HLG mode the gamma
value is fixed to 0.5. The use of gamma values lower than 0.45 and higher than 0.5 is not
recommend.
Knee
The knee function is used to control the highlights of the image. By the activation of Knee correction,
the quality of the picture will be improved, with more details in the white areas, fluid contrast and
less overexposed, “white-burnt” parts of image. Knee correction is necessary to keep the images
within the signal level provided as standard and influences contrast in areas with high brightness.
The knee helps to prevent over-exposure by limiting signals in high intensity areas of the subject to
the dynamic range of your camera.
Values are
off - Knee function switched off
on - Knee function switched on
Knee Point
Sets the position of the knee point output level.
To Next Page
Loading...