8 Bit or 16 bit , sRGB or Pro Photo

Started Sep 11, 2019 | Discussions thread
pixelgenius
pixelgenius Senior Member • Posts: 4,224
Re: 8 Bit or 16 bit , sRGB or Pro Photo

knickerhawk wrote:

Ken60 wrote:

Go into photoshop and go to colour settings..... look for "dither 8 bit" and uncheck it.

Close Photoshop and download the chart I linked. open it as a 16 bit Prophoto and call it 16 bit. Now convert it to 8 bit and save as 8 bit. With both open and select two windows side by side , zooming in on the black and white ball.

Now look at the two balls in 16 & 8 bit together each covering half your screen. What you will start to see is the real 8 bit , with all the horrid things that it can deliver, not the faked version of 8 bit you are claiming is as good as 16 bit ...... but dithered to fake it.

The dither on/off switch doesn't make that much of a difference here even with a purely synthetic image as is the case with the balls.

But for proper testing, it should be off.

The banding will just look a little more jagged. With a naturally dithered image, which is usually the case with photographs that aren't hugely edited, the dithering setting will be even less relevant.

More importantly, your experiment is failing to address a fundamental question: what is the bit-depth of your monitor?

Actually the far more important question has little to do with the display: Is there any  benefit to sending more than 8-bits per color after editing in 16-bit to the printer. The answer has been and continues to be: No.

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