Hi Laurent, 2011. 3. 4., 오전 12:05, Laurent Pinchart 작성: > Hi Kim, probably it's difficult to call my name. Just call me riverful. > > On Thursday 03 March 2011 16:01:24 Kim HeungJun wrote: >> Hello everyone, >> >> I have a question about realization the camera brightness control (or >> exposure, because it's similar effect). I'm confused this similar two >> control - V4L2_CID_BRIGHTNESS and V4L2_CID_EXPOSURE. >> >> These control both express the brightness consequently. >> >> The CID can express the brightness - V4L2_CID_EXPOSURE, is prepared in the >> camera class. And V4L2_CID_BRIGHTNESS seems be possible to use in the >> camera driver, although it is defined in the global(?) class. >> >> So, which CID I can use to express the image's brightness?? > > V4L2_CID_EXPOSURE is used to control the exposure time (which obviously > influences the brightness), and V4L2_CID_BRIGHTNESS to control the brightness > offset (constant value added to all pixels in the image by a processing block > in the digital domain). And I didn't know before, it helps very much for me. :) Thanks, Heungjun Kim -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
