2017-10-12, 02:15
A well documented drawback of (Samsung's) AMOLED displays is that its inky black levels come at the cost of detail in dark elements on the screen. People have turned to apps such as Twilight to crank up the brightness of the video via a system-wide overlay to make the details pop out of the murk.*
Note: this regards cranking the levels of brightness of an image, not the screen. Increasing screen brightness does not increase the values of the image being displayed, the separation and definition of which is the problem.
While the Twilight app approach works, it does unfortunately expose any uniformity issues which the displays have in their black levels. A black screen will suddenly show blotches which are normally invisible. Possibly a hidden inherent problem of AMOLED screens or something Samsung does not calibrate for as it is usually invisible.
Whatever the case may be, the result is that the black background around an image (say a 16:9 image on a 4:3 display) will show these faint blobs, somewhat reminiscent of old TV's.
All of this is to make the case for a feature which either offers the ability to outright crank the dark spectrum of video playback by a set percentage (lifting all the dark levels a little, so that the details reappear on AMOLED screens) or the ability to manipulate the brightness levels -- preferably via some curve -- for the video while leaving the rest of the screen unaltered.
I'm not sure if this is even possible, or if the whole screen actually needs to be brightened via an overlay for this to work.
It would be a nice feature though.
* http://phandroid.com/2016/03/22/twilight...galaxy-s7/
Note: this regards cranking the levels of brightness of an image, not the screen. Increasing screen brightness does not increase the values of the image being displayed, the separation and definition of which is the problem.
While the Twilight app approach works, it does unfortunately expose any uniformity issues which the displays have in their black levels. A black screen will suddenly show blotches which are normally invisible. Possibly a hidden inherent problem of AMOLED screens or something Samsung does not calibrate for as it is usually invisible.
Whatever the case may be, the result is that the black background around an image (say a 16:9 image on a 4:3 display) will show these faint blobs, somewhat reminiscent of old TV's.
All of this is to make the case for a feature which either offers the ability to outright crank the dark spectrum of video playback by a set percentage (lifting all the dark levels a little, so that the details reappear on AMOLED screens) or the ability to manipulate the brightness levels -- preferably via some curve -- for the video while leaving the rest of the screen unaltered.
I'm not sure if this is even possible, or if the whole screen actually needs to be brightened via an overlay for this to work.
It would be a nice feature though.
* http://phandroid.com/2016/03/22/twilight...galaxy-s7/
