Under-exposed (dark) HDR photos in Camera2 API mode with Samsung A40
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Hi, I was experimenting with Open Camera on a Samsung A40. With Camera2 API enabled, all HDR photos come out under-exposed (dark). The original API mode does not have this issue. The reason why I would like to use Camera2 API is because it takes the required 3 photos much quicker. Has anyone else come across this issue? It seems that the phone is unable to take an over-exposed photo required to construct the HDR. Thank you.
Have you tried adjusting up the exposure? Also did you try photo settings/Enable fast HDR/expo burst, ticked on/off? I have the opposite problem on my Umidigi A3s (16mp Sony IMX398), I have to set exposure to either 1st or 2nd position from the left when in HDR, otherwise it's blown out if left alone. But the resulting pic is great then. HDR setting is non functional on my default cam.
I tried playing with the exposure adjustment setting while in the camera preview mode. If I go to the left of "0" (negative EV numbers) then the picture becomes darker. If I go to the right of "0" (positive EV numbers) nothing changes. To be fair, "Camera2 API Probe" app only shows limited support for the Camera2 API, so this could be the reason.
Hi there, I have the same phone, Samsung A40, and the same problem: HDR works good with standard API, instead using camera2API the picture are under-exposed.
I hoped to find a solution here..
I have the same issue on a samsung A51 an reported it a few weeks ago. Try setting manually the iso and shutter speed. If it's dark, then it's a bug in samsung implementation of CameraApi2. All the manual camera apps I tried have the same issue
Thanks for the info. Some questions:
I'd be interested to know if disabling Settings/Photo settings/"Enable fast HDR/expo burst" (towards the bottom) helps?
Also what happens when using manual ISO/exposure in Camera 2 mode? For this, go to the "-/+" icon, then click "M" to enter manual mode, then try adjusting the sliders.
One of the comments suggest this is an issue with the Camera2 support of these devices (my Galaxy S10e is fine, but maybe not some of the A series).
Clearly I spoke to soon about this working on the Galaxy S10e, as HDR/expo and more has also now broken in the Android 11 update, see https://sourceforge.net/p/opencamera/discussion/general/thread/d7e166c1bf/ !
I changed the code so it uses AE mode with exposure compensation instead of iso/exposure control and now HDR works on my Samsung A51. Manual controls (iso/exposure) are broken on this device