In nv-multimedia code， which location is the source code of the automatic exposure function？

[blstcvLiu]

The capture can work well with AE/AWB mode by using a plugin which name is “nvarguscamerasrc”.
But I couldn’t find its implementation in the nvarguscamerasrc and multimedia code，I just found the upper function，Is the auto exposure part not open source？

I now have a functional requirement，I need to implement the metering modes for the camera，such as central metering,point metering,region metering,evaluative metering.What can I do to achieve it?

[JerryChang]

hello blstcvLiu,

sorry, we did not public AE sources, (or, ISP, 3A controls…etc) for reference.
you may use the Argus API, Argus::IAutoControlSettings::setAeRegions to configure the AE regions of interest.
note, the AE algorithm currently does not ignore completely outside setAeRegion(), it gives more weights to the selected region.
thanks

[blstcvLiu]

hello JerryChang,

Can this interface " setAeRegions" be set to multiple regions?
And how to add or subtract regions?

[JerryChang]

@blstcvLiu

multiple regions?

hello blstcvLiu,

may I know what’s the actual use-case?
please refer to Topic 82744 for the sample codes to modify interest region.
thanks

[blstcvLiu]

I need to implement the metering modes for the camera，such as central metering,point metering,region metering,evaluative metering

[blstcvLiu]

hello JerryChang，

Suppose I want to divide a frame into 12 regions for evaluative metering,should the weight parameter be set to 1 or 0.083 (1/12)?

[JerryChang]

hello blstcvLiu,

this depends-on your use-case, internally, it’ll have accumulating weights of each region and normalized for calculation.

[blstcvLiu]

Thank you for your support