Thank you.
So if V4L2_CID_EXPOSURE is for Exposure Value control, I think there
is no api for exposure metering. right?
Actually many of APIs for camera are missing I guess.
Cheers
Nate
2009. 01. 30, 오전 3:35, Guennadi Liakhovetski 작성:
[removed redhat list from CC]
On Thu, 29 Jan 2009, DongSoo Kim wrote:
Hello.
When we take pictures, sometimes we don't get satisfied with the
exposure of picture. Too dark or too bright.
For that reason, we need to bias EV which represents Exposure Value.
So..if I want to control digital camera module with V4L2 API, which
API should I take for EV control?
V4L2 document says that V4L2_CID_BRIGHTNESS is for picture
brightness,
but it is for "Image properties" and that "image" means the image
frame of TV or PVR things.Am I right?
There's also V4L2_CID_EXPOSURE
If I may, can I use V4L2_CID_BRIGHTNESS for EV control of digital
cameras?
or..otherwise I should make a new API for that functionality.
I'm little bit confused, because I think the brightness of picture
could differ from exposure value of digital camera..help me ;(
Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
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