Hitachi HV-C20, Руководство по эксплуатации

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Auto shading correction
Uneveness in colors may be observed in the vertical direction according to a lens. This camera
is provided with the function to correct such uneveness in colors automatically. Two correction
modes are available. Prior to execution of correction, select the desired correction
mode in the menu mode.
Mode Application
SHAD MODE:COLOR Normal lens
SHAD MODE:LUMIN Microscope
1. Establish the direct mode.
2. Set the lens iris appropriately.
3. Allow a white object to be displayed on the entire screen.
Use care that uneveness in colors cannot he observed in the vertical direction.
4. Press the ASC switch. Then, AUTO SHADING:OK is displayed, and uneveness in colors is corrected.
5. When auto shading correction is not made, the corresponding message is displayed.
Repeat the above procedure, if necessary.
(Note) When the ASC switch is pressed, a message can disappear in accordance with the brightness of a
white object in a scene. This is not due to failure. In this case, correction is being performed. Therefore,
do not move the camera, or do not change the lens iris until the message AUTO SHADING:OK or NG
is displayed. If wrong operation is made, correct shading correction data is not
obtained. If wrong operation is made, repeat the steps 1 thru 4 above.
Error message Measures
AUTO SHADING:NG
CHANGE TO CAM
TRY AGAIN
•
Turn off the color bars.
AUTO SHADING:NG
LOW LIGHT
TRY AGAIN
•
Insufficient quantity of light
•
Increase illumination, open the lens iris, or increase gain to obtain an
appropriate video level.
•
Press the AWB switch again
AUTO SHADING:NG
C.TEMP HIGH
TRY AGAIN
•
Color temperature is too high.
(Continue to use if there is no practical problem.)
•
Lower the color temperature by adding a
warm color temperature correcting filter to the lens or the illumination.
AUTO SHADING:NG
C.TEMP LOW
TRY AGAIN
•
Color temperature is too low.
(Continue to use if there is no practical problem.)
•
Increase the color temperature by adding a cold
color temperature correcting filter to the lens or the illumination.
AUTO SHADING:NG
SHAD MODE: COLOR
CONTROL LIMIT
•
The optimum correction could not be made because correction amount
is too large. Correction has been made as much
as possible. Continue to use if there is no practical problem
•
Replace with a lens providing less shading.
AUTO SHADING:NG
SHAD MODE: LUMIN
CONTROL LIMIT
•
The optimum correction could not be made because correction amount
is too large. Correction has been made as much
as possible. Continue to use if there is no practical problem.
•
Replace with a lens providing less shading.