Re: disable automatic gain control
Thanks Steven, I will try that.
-Mike
On 6/1/12, Steven Hang <me@...> wrote:
> On a Pt. Grey Chameleon USB camera, you can set manual gain using
>
> dc1394_feature_set_mode(camera, DC1394_FEATURE_GAIN,
> DC1394_FEATURE_MODE_MANUAL)
>
> If you are interested in setting the absolute gain, you can turn on that
> feature using these two methods:
>
> dc1394_feature_set_absolute_control(camera, DC1394_FEATURE_GAIN,
> DC1394_ON);
> dc1394_feature_set_power(camera, DC1394_FEATURE_GAIN, DC1394_ON );
>
> and setting the value using the following method:
>
> dc1394_feature_set_absolute_value(camera, DC1394_FEATURE_GAIN, float
> value);
>
> Hope this helps.
>
> On Fri, Jun 1, 2012 at 11:23 AM, Michael Williamson <
> michael.h.williamson@...> wrote:
>
>> Hi, I have a question.
>>
>> How do I disable automatic gain control?
>> I have a Marlin F131B. All of the camera settings
>> appear to be in MAN mode, yet the gain changes
>> by itself. The camera must be doing it. Here is the
>> features printout:
>>
>> avt_adv_feature.ExtdShutter = 1
>> shutter min = 1, shutter max = 4095
>> gain min = 1, gain max = 14
>> ------ Features report ------
>> OP - one push capable
>> RC - readout capable
>> O/OC - on/off capable
>> AC - auto capable
>> MC - manual capable
>> ABS - absolute capable
>> -----------------------------
>> Brightness:
>> RC MC (active is: MAN)
>> min: 0 max 127
>> current value is: 63
>> Exposure:
>> RC MC (active is: MAN)
>> min: 50 max 205
>> current value is: 125
>> Sharpness:
>> NOT AVAILABLE
>> White Balance:
>> NOT AVAILABLE
>> Hue:
>> NOT AVAILABLE
>> Saturation:
>> NOT AVAILABLE
>> Gamma:
>> RC O/OC MC (active is: MAN)
>> Feature: OFF min: 0 max 1
>> current value is: 0
>> Shutter:
>> RC MC (active is: MAN) AC (active is: MAN)
>> min: 1 max 4095
>> current value is: 2000
>> Gain:
>> RC MC (active is: MAN)
>> min: 1 max 14
>> current value is: 1
>> Iris:
>> NOT AVAILABLE
>> Focus:
>> NOT AVAILABLE
>> Temperature:
>> NOT AVAILABLE
>> Trigger:
>> RC O/OC
>> Feature: OFF
>> AvailableTriggerModes: 384 385 391
>> AvailableTriggerSources: none
>> Polarity Change Capable: True
>> Current Polarity: NEG
>> current mode: 384
>> Trigger Delay:
>> RC O/OC MC (active is: MAN) ABS
>> Feature: OFF min: 0 max 4095
>> current value is: 0
>> absolute settings:
>> value: 0.000000
>> min: 0.000001
>> max: 2.097152
>> White Shading:
>> NOT AVAILABLE
>> Frame Rate:
>> NOT AVAILABLE
>> Zoom:
>> NOT AVAILABLE
>> Pan:
>> NOT AVAILABLE
>> Tilt:
>> NOT AVAILABLE
>> Optical Filter:
>> NOT AVAILABLE
>> Capture Size:
>> NOT AVAILABLE
>> Capture Quality:
>> NOT AVAILABLE
>>
>>
>> Thanks,
>> -Mike
>>
>>
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