5,597,647 Members 33,305 Now Online
XDA Developers Android and Mobile Development Forum

Just suspected about HDR mode

Tip us?
 
Jatiyanon
Old
#1  
Junior Member - OP
Thanks Meter 0
Posts: 5
Join Date: Jan 2014
Lightbulb Just suspected about HDR mode

I just suspected, HDR mode in camera app that it is a new technology in the hardware or just to take pictures and then adjust the picture brightness to brighten it up which others app it can be done.
 
jbdan
Old
#2  
jbdan's Avatar
Senior Member
Thanks Meter 473
Posts: 2,142
Join Date: Aug 2010
Location: Atlanta
It actually takes 3 quick pictures: one is properly exposed (well according to the software), one is over exposed, and one is underexposed. The 3 images are blended together to make one with more dynamic range than just a single photo from this camera can provide.

Nexus5
"The mind set on the Spirit is life and peace" <><
The Following 3 Users Say Thank You to jbdan For This Useful Post: [ Click to Expand ]
 
bblzd
Old
#3  
Senior Member
Thanks Meter 177
Posts: 820
Join Date: Nov 2013
Location: Toronto
Quote:
Originally Posted by jbdan View Post
It actually takes 3 quick pictures: one is properly exposed (well according to the software), one is over exposed, and one is underexposed. The 3 images are blended together to make one with more dynamic range than just a single photo from this camera can provide.

Nexus5
That is what a normal HDR mode is supposed to do. But then Google's HDR+ in the Nexus 5 isn't a normal HDR mode.
W32
 
GldRush98
Old
#4  
GldRush98's Avatar
Senior Member
Thanks Meter 199
Posts: 2,043
Join Date: Jun 2006
Location: Taylorville, IL.
Quote:
Originally Posted by bblzd View Post
That is what a normal HDR mode is supposed to do. But then Google's HDR+ in the Nexus 5 isn't a normal HDR mode.
It is simulated HDR. True HDR shots are taken by bracketing the exposure (shutter speed) of an SLR camera (part time photographer here). A cheap little image sensor in a phone can't do this, so it simulates over exposure and under exposure by taking a longer or faster shot from the sensor. Then the camera software automatically combines the images. In a true HDR photo, you need some decent software to merge the bracketed images together, and this usually takes time to tweak everything by hand to make it not looks like ass (see /r/****tyhdr for plenty of examples on how NOT to do this).
Anything claiming to be HDR that is not taken from proper bracketing on an SLR camera is basically simulated HDR.
---Phone---
Nexus 5 32gb
Android 4.4.2 KOT49H, Baseband 1.0.25.0.23, Unlocked, rooted, TWRP Recovery 2.6.3.4
---Tablets---
Samsung Note 10.1 2014 Edition 32gb
Android 4.3, stock & rooted
Nexus 7 16gb
Android 4.4.2 KOT49H, Unlocked, rooted, TWRP Recovery 2.6.3.1
---Past---
Galaxy Nexus (AT&T)
Android 4.3 JWR66Y, Baseband I9250XXLJ1, Unlocked, rooted, Clockwork Touch 6.0.4.3
Google Nexus One | AT&T Fuze (Touch Pro) | AT&T 8525 (Hermes) | AT&T 8125 (Wizard)
The Following 3 Users Say Thank You to GldRush98 For This Useful Post: [ Click to Expand ]
 
jbdan
Old
#5  
jbdan's Avatar
Senior Member
Thanks Meter 473
Posts: 2,142
Join Date: Aug 2010
Location: Atlanta
Quote:
Originally Posted by GldRush98 View Post
It is simulated HDR. True HDR shots are taken by bracketing the exposure (shutter speed) of an SLR camera (part time photographer here). A cheap little image sensor in a phone can't do this, so it simulates over exposure and under exposure by taking a longer or faster shot from the sensor. Then the camera software automatically combines the images. In a true HDR photo, you need some decent software to merge the bracketed images together, and this usually takes time to tweak everything by hand to make it not looks like ass (see /r/****tyhdr for plenty of examples on how NOT to do this).
Anything claiming to be HDR that is not taken from proper bracketing on an SLR camera is basically simulated HDR.
Well said. I gave the "layman version"

(photography enthusiast here too)

Nexus5
"The mind set on the Spirit is life and peace" <><
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes