Analog Control

10 Jun 2024
8 Minutes to read

Analog Control

Updated on 10 Jun 2024
8 Minutes to read

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Gain Selector

Name	GainSelector	Standard
Description	Selects which Gain is controlled by the Gain features.
Interface	Enumeration
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	See enum entries table below.
Default value	All – For color camera White – For mono camera
Availability	ALL
Notes	The linear gain reflects the product of the analog and digital gain. Setting the linear gain will adapt the analog (if available) as well as the digital gain. The analog gain is not supported for all products. If the analog gain is not available, the digital gain is not displayed separately. In this case the linear gain reflects the digital gain value. If the gain is read while All/AnalogAll/DigitalAll is selected, an average of all available color channels depending on PixelFormat is returned. If the gain is written, the value is written to all color channels defined in PixelFormat. In case of using ColorToGrey the PixelFormat will be Mono but the color channels for reading and writing the gain value will be Red,Green and Blue.
Error behavior	See the device error code documentation.

Gain Selector Enum Entries:

Name	Description
All	Selects linear gain of all available color channels.
Red	Selects linear gain red
Green	Selects linear gain green
Blue	Selects linear gain blue
White	Selects linear gain white
Infrared	Selects linear gain infrared

AnalogAll	Selects analog gain of all available color channels.
AnalogRed	Selects analog gain red
AnalogGreen	Selects analog gain green
AnalogBlue	Selects analog gain blue
AnalogWhite	Selects analog gain white

DigitalAll	Selects digital gain of all available color channels.
DigitalRed	Selects digital gain red
DigitalGreen	Selects digital gain green
DigitalBlue	Selects digital gain blue
DigitalWhite	Selects digital gain white

Gain

Name	Gain[GainSelector]	Standard
Description	This is an amplification factor applied to the video signal.
Interface	Float
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	The value range varies for different camera variants. Therefore, query the value range from the feature parameters (min/max entries) However, for the digital gain the value range is the same for all camera variants. LinearGain = [DigitalMin * AnalogMin, DigitalMax * AnalogMax] AnalogGain = camera dependent DigitalGain = [1.0 , 3.999]
Default value	1.0
Availability	ALL
Notes	This feature is available for Gain Selector You should create new DSNU reference when changing analog gain.
Error behavior	See the device error code documentation.

Gain Auto

Name	GainAuto[GainSelector]	Standard
Description	Sets the automatic gain control (AGC) mode. The exact algorithm used to implement AGC is device-specific.
Interface	Enumeration
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	See enum entries table below.
Default value	Off
Availability	ALL
Notes	This feature is available only if Gain Selector is All or White (White for Mono cameras) The status of automatic gain control is reflected in GainAutoStatus feature. When the GainAuto feature has changed its value to Off after performing the “Once” or “AdjustTargetValueToMaxVideo” calibration, please query GainAutoStatus to check whether the automatic gain control was successful.
Error behavior	See the device error code documentation.

Gain Auto Enum Entries:

Name	Description
Off	Gain is user-controlled using Gain.
Once	Gain is automatically adjusted once by the device. Once it has converged, it automatically returns to the Off state.
Continuous	Gain is constantly adjusted by the device.
AdjustTargetValueToMaxVideo	This process adjusts “Target value” for “GainControlRegion” that the resulting maximum video level fits to given “Target value”. (see feature “Target value”) Therefore, the Target value feature defines the target value for AdjustTargetValueToMaxVideo command but at the same time the command will adapt the same Target value feature. The adapted Target value will be the base for further GainAuto commands. Next to adapting the target values this command will perform GainAuto Once command implicitly. After process has finished it automatically return to Off state.

Gain Auto Status

Name	GainAutoStatus	Standard
Description	Returns the state of the automatic gain control
Interface	Enumeration
Access mode	Read only
Adjustable while grabbing	-
Value range	See enum entries table below.
Default value	Control off
Availability	ALL
Notes	-
Error behavior	-

Gain Auto Enum Entries:

Name	Description
ControlOff	No automatic gain control in progress.
ControlSuccessful	The automatic gain control was successfully performed.
ControlInProgress	The automatic gain control is in progress.
ControlStopped	Continuous gain control temporarily stopped. Gain stop control enabled; gain stop condition reached!
ReferenceTimeout	No reference data from the gain control region available! Camera might be in triggered mode. Probably there are no trigger pulses.
LowerGainLimit	Warning! The automatic gain control has reached lower gain limit!
UpperGainLimit	Warning! The automatic gain control has reached upper gain limit!
VideoLevelLowerLimit	Warning! Process “AdjustTargetValueToMaxVideo”, video level too low for target value adjustment
VideoLevelUpperLimit	Warning! Process “AdjustTargetValueToMaxVideo”, video level too high for target value adjustment
TargetValueOutOfRange	Warning! Process “AdjustTargetValueToMaxVideo”, adjusted target values are out of range

Synchronization Mode Enable

Name	GainAutoSyncModeEnable	Custom
Description	Controls whether the gain control reference values are taken synchronous to frame start or independent of frame start. In case of synchronous mode is activated only one reference per frame will be captured. In case of synchronous mode is inactive the reference values are taken continuously from image data stream.
Interface	Boolean
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	True – Enables synchronization mode False – Disables synchronization mode
Default value	False
Availability	ALL
Notes	-
Error behavior	See the device error code documentation.

Stop Control Enable

Name	GainAutoStopControlEnable	Custom
Description	Controls whether the gain auto continuous mode is limited according to the gain stop factor.
Interface	Boolean
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	True – Enables Gain Auto Stop Control False – Disables Gain Auto Stop Control
Default value	False
Availability	ALL
Notes	-
Error behavior	-

Stop Factor

Name	GainAutoStopFactor	Custom
Description	The stop factor is used to limit the continuous gain control. The factor is multiplied with the target reference values. The result defines a threshold for the current reference values. Whenever the current reference values are equal or fall below the threshold, the continuous gain control is not performed till the current reference values are again larger than the threshold.
Interface	Float
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	[0.0 , 1.0]
Default value	0.8
Availability	ALL
Notes	-
Error behavior	See the device error code documentation.

Gain Control Region Offset X

Name	GainControlRegionOffsetX	Custom
Description	Sets the offset x of the gain control region. (in pixel)
Interface	Integer
Access mode	Read/Write
Adjustable while grabbing	No
Value range	[2 , (SensorWidth- GainControlRegionWidth)]
Default value	(SensorWidth / 2 ) - 48
Availability	ALL
Notes	The minimal step of the value is one.
Error behavior	See the device error code documentation.

Gain Control Region Width

Name	GainControlRegionWidth	Custom
Description	Sets the width of the gain control region. (in pixels)
Interface	Integer
Access mode	Read/Write
Adjustable while grabbing	No
Value range	[8 , 240]
Default value	48
Availability	ALL
Notes	The step of the width is two.
Error behavior	See the device error code documentation.

Gain Control Region Offset Y

Name	GainControlRegionOffsetY	Custom
Description	Sets the offset y of the gain control region. (in pixels)
Interface	Integer
Access mode	Read/Write
Adjustable while grabbing	No
Value range	Frame trigger off: [3, Height – GainControlRegionHeight] Frame trigger on: [3 -TriggerDelayLines, 32767]
Default value	3
Availability	ALL
Notes	This feature only takes effect if the Synchronization Mode Enable is set true!
Error behavior	See the device error code documentation.

Gain Control Region Height

Name	GainControlRegionHeight	Custom
Description	Sets the height of the gain control region. (in pixel)
Interface	Integer
Access mode	Read/Write
Adjustable while grabbing	No
Value range	[2 , 240]
Default value	32
Availability	ALL
Notes	-
Error behavior	See the device error code documentation.

Gain Control Region visible

Name	GainControlRegionVisible	Custom
Description	The borders of the gain control region are drawn into the image if enabled.
Interface	Boolean
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	True – Displays the borders of the gain control region False – Does not display the borders of the gain control region
Default value	False
Availability	ALL
Notes	-
Error behavior	-

Average Samples

Name	GainAutoAverageSamples	Custom
Description	The number of reference samples which are averaged before doing a gain control step.
Interface	Integer
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	[1 , 32]
Default value	4
Availability	ALL
Notes	-
Error behavior	See the device error code documentation.

Gain Control Region Channel Selector

Name	GainControlRegionChannelSelector	Custom
Description	Selects the color channel to define the target intensity value or to read the current intensity value of the gain control region.
Interface	Enumeration
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	See enum entries table below.
Default value	Red
Availability	ALL
Notes	-
Error behavior	See the device error code documentation.

Gain Control Region Channel Selector Enum Entries:

Name	Description
All	Selects all available channels for the actual PixelFormat to set the target value to same number. Reading the target value will return the average of all available channels for the current PixelFormat. Reading the current value will return the average of all available channels for the current PixelFormat.
Red	Selects red channel to define the target intensity value or to read the current intensity value of the gain control region.
Green	Selects green channel to define the target intensity value or to read the current intensity value of the gain control region.
Blue	Selects blue channel to define the target intensity value or to read the current intensity value of the gain control region.
White	Selects white channel to define the target intensity value or to read the current intensity value of the gain control region.
Infrared	Selects InfraRed channel to define the target intensity value or to read the current intensity value of the gain control region.

Target value

Name	GainControlRegionTargetValue[GainControlRegionChannelSelector]	Custom
Description	The target luminance intensity value of the selected channel in the gain control region. The bit depth of the value is 10-bit.
Interface	Integer
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	[0 , 1023]
Default value	700
Availability	ALL
Notes	Gain Auto “*Once“ or “Continuous”: Internal Gain Control adjusts gain values until current value of GainControlRegion have reached target values. Gain Auto “AdjustTargetValueToMaxVideo*”: Target value determines the maximum video level which the raw image (without PRNU correction) should reach when doing gain adjustment with GainAuto (Once or Continuous). For that the camera adapts the Target value, until that criterion is fulfilled.
Error behavior	See the device error code documentation.

Current value

Name	GainControlRegionCurrentValue[GainControlRegionChannelSelector]	Custom
Description	The current luminance intensity value of the selected channel in the gain control region. The bit depth of the value is 10-bit.
Interface	Integer
Access mode	Read only
Adjustable while grabbing	-
Value range	-
Default value	-
Availability	ALL
Notes	-
Error behavior	-

Sensor Sensitivity Channel Selector

Name	SensorSensitivityChannelSelector	Custom
Description	Selects the color to be controlled for the sensor sensitivity.
Interface	Enumeration
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	See enum entries table below.
Default value	Red
Availability	ALL
Notes	-
Error behavior	See the device error code documentation.

Sensor Sensitivity Channel Selector Enum Entries:

Name	Availability	Description
All	ALL	Selects all color channels to control sensor sensitivity. If the sensor sensitivity is modified, the specified value is applied to all color channels. If you read the sensor sensitivity, the lastly set value is returned in this case. After a boot-up, 0 is returned.
White	ax_X	Selects white channel to control sensor sensitivity.
Red	ax_X	Selects red channel to control sensor sensitivity.
Green	ax_X	Selects green channel to control sensor sensitivity.
Blue	ax_X	Selects blue channel to control sensor sensitivity.

Sensor Sensitivity

Name	SensorSensitivity[SensorSensitivityChannelSelector]			Custom
Description	Controls the sensor sensitivity of the specified selector.
Interface	Integer
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	Variant	Min Value	Max Value
	ax_X	0	2
	g8_X	0	7
Default value	Variant	Default Value
	ax_X	2
	g8_X	4
Availability	ALL
Notes	You should create new DSNU/PRNU reference when changing this parameter. g8_X: At sensitivity value 0 the FullWell of the pixels can be exhausted and the maximum SNR of the sensor can be reached, but an analog signal limitation can be expected at ~168dn@8bit. This can be brought back to the full digital range of 0...255 by the PRNU or DigGain.
Error behavior	See the device error code documentation.

Gamma

Name	Gamma	Standard
Description	Controls the gamma correction of pixel intensity. This is typically used to compensate for non-linearity of the display system (such as CRT).
Interface	Float
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	[0.1 – 2.5]
Default value	1.0
Availability	ALL
Notes	The gamma values 0.2 – 2.5 behave corresponding to the standard gamma definition. The gamma value 0.1 enables a special sRGB gamma table. The gamma feature is effective only if the Gamma LUT is enabled.
Error behavior	See the device error code documentation.

Brightness Contrast Enable

Name	BrightnessContrastEnable	Custom
Description	Enable brightness and contrast image processing unit.
Interface	Boolean
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	True – Enables brightness and contrast image processing unit. False – Disables brightness and contrast image processing unit.
Default value	False
Availability	ALL
Notes	-
Error behavior	See the device error code documentation.

Brightness Contrast Channel Selector

Name	BrightnessContrastChannelSelector	Custom
Description	Selects the color channel to control the brightness and contrast.
Interface	Enumeration
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	See enum entries table below.
Default value	Red
Availability	ALL
Notes	-
Error behavior	See the device error code documentation.

Brightness Contrast Channel Selector Enum Entries:

Name	Description
Red	Brightness or Contrast will be applicable to the red channel.
Green	Brightness or Contrast will be applicable to the green channel.
Blue	Brightness or Contrast will be applicable to the blue channel.
White	Brightness or Contrast will be applicable to the white channel.
Infrared	Brightness or Contrast will be applicable to the infrared channel.

Contrast

Name	BrightnessContrastGain[BrightnessContrastChannelSelector]	Custom
Description	Controls the contrast (gain) value for the selected color channel.
Interface	Float
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	[0.0 , 1.999]
Default value	1.0
Availability	ALL
Notes	-
Error behavior	See the device error code documentation.

Brightness

Name	BrightnessContrastOffset[BrightnessContrastChannelSelector]	Custom
Description	Controls the brightness (offset) value for the selected color channel.
Interface	Enumeration
Access mode	Read/Write
Adjustable while grabbing	Yes
Value range	[-0.25 , 0.25]
Default value	0.0
Availability	ALL
Notes	The resulting brightness (offset) is defined by the features value multiplied with the maximum value of a pixel defined by the pixel formats bit-depth. Example: The maximum value of a pixel using the pixel format RGB8 (bit-depth 8-bit) is 255. Brightness value of 0.1 would increase the output pixel value by: Offset= 0.1x 255 = 25dn’s
Error behavior	See the device error code documentation.

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