English Amiga Board


Go Back   English Amiga Board > Main > Amiga scene

 
 
Thread Tools
Old 14 August 2006, 17:39   #1
petza
Registered User
 
Join Date: Aug 2005
Location: UK / NEWCASTLE
Age: 42
Posts: 230
how many colours has the

how many colours can the pee wee get on screen at once
petza is offline  
AdSense AdSense  
Old 14 August 2006, 17:57   #2
thomas
Registered User
thomas's Avatar
 
Join Date: Jan 2002
Location: Germany
Posts: 5,552
Well, each pixel can have one of 16,777,216 colours. Given a resolution of 2048 x 1536 (which is quite big even nowadays), one can display 3,145,728 colours at once. 786,432 colours at 1024 x 768.
thomas is offline  
Old 14 August 2006, 18:22   #3
petza
Registered User
 
Join Date: Aug 2005
Location: UK / NEWCASTLE
Age: 42
Posts: 230
Quote:
Originally Posted by thomas
Well, each pixel can have one of 16,777,216 colours. Given a resolution of 2048 x 1536 (which is quite big even nowadays), one can display 3,145,728 colours at once. 786,432 colours at 1024 x 768.
whoah
petza is offline  
Old 14 August 2006, 23:40   #4
mr_0rga5m
Tik Gora :D

mr_0rga5m's Avatar
 
Join Date: Oct 2001
Location: Round yo momma's
Posts: 1,273
pee wee
mr_0rga5m is offline  
Old 15 August 2006, 03:59   #5
petza
Registered User
 
Join Date: Aug 2005
Location: UK / NEWCASTLE
Age: 42
Posts: 230
Quote:
Originally Posted by mr_0rga5m
pee wee
it means PC
petza is offline  
Old 15 August 2006, 10:58   #6
thomas
Registered User
thomas's Avatar
 
Join Date: Jan 2002
Location: Germany
Posts: 5,552
BTW, you need a resolution of 4730 x 3547 to have more pixels than there are different colours.
thomas is offline  
Old 15 August 2006, 13:27   #7
Galahad/FLT
Going nowhere

Galahad/FLT's Avatar
 
Join Date: Oct 2001
Location: United Kingdom
Age: 44
Posts: 6,606
The most absolutely useless thing about hardware that can display as many as 3million colours is that the human eye cannot distinguish anywhere near that many colours, so all in all, quite useless really!
Galahad/FLT is offline  
Old 15 August 2006, 13:57   #8
Toni Wilen
WinUAE developer
 
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 42
Posts: 19,946
Quote:
Originally Posted by Galahad/FLT
The most absolutely useless thing about hardware that can display as many as 3million colours is that the human eye cannot distinguish anywhere near that many colours, so all in all, quite useless really!
Try to do single base color (or grayscale) color slide that fills whole screen with less bits..

(and human eye can distinguish millions of colors, http://hypertextbook.com/facts/2006/JenniferLeong.shtml , result of random googling)
Toni Wilen is online now  
Old 15 August 2006, 20:46   #9
Galahad/FLT
Going nowhere

Galahad/FLT's Avatar
 
Join Date: Oct 2001
Location: United Kingdom
Age: 44
Posts: 6,606
Quote:
Originally Posted by Toni Wilen
Try to do single base color (or grayscale) color slide that fills whole screen with less bits..

(and human eye can distinguish millions of colors, http://hypertextbook.com/facts/2006/JenniferLeong.shtml , result of random googling)

Sigh Toni, don't believe everything you read on the Internet by so called 'experts'.

Visit an opthalmic surgeon and ask a real expert..... I did and a Bit more reliable than 'random googling'
Galahad/FLT is offline  
Old 15 August 2006, 20:50   #10
Toni Wilen
WinUAE developer
 
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 42
Posts: 19,946
Quote:
Originally Posted by Galahad/FLT
Sigh Toni, don't believe everything you read on the Internet by so called 'experts'.

Visit an opthalmic surgeon and ask a real expert..... I did and a Bit more reliable than 'random googling'
Sorry but I don't ever trust single person's opinion, at least my result has opinions from multiple persons

Added: Maybe there is some trustworthly enough scientific studies somewhere? This is quite interesting topic in my opinion (but probably has nothing to do with PC displays because of pixel number limitation and really tiny pixels?)

Last edited by Toni Wilen; 15 August 2006 at 21:15.
Toni Wilen is online now  
Old 15 August 2006, 20:52   #11
BippyM
Global Moderator

BippyM's Avatar
 
Join Date: Nov 2001
Location: Nottingham, UK
Age: 42
Posts: 8,621
I can see at least 3 colours so I'm ok

Actually I'm colour blind so I'm fuxxored!
BippyM is offline  
Old 15 August 2006, 22:10   #12
Qube
Registered User
Qube's Avatar
 
Join Date: Aug 2006
Location: England
Posts: 200
The other issue is that current LCD only seem to show 16M, or in some cases lower. I did hear somewhere that to cheat and get lower (faster) ms update rates they dropped the colour count?

Q;
Qube is offline  
Old 16 August 2006, 01:06   #13
NoX1911
2064
NoX1911's Avatar
 
Join Date: Jul 2005
Location: Germany
Posts: 170
8bit color precision is good but it still has limitations. Higher precision is already present in professional environments (RAW, HDR, photography,...) and it will come to consumer level as well. One of the proponents is John Carmack. http://doom-ed.com/blog/2000/04/
NoX1911 is offline  
Old 16 August 2006, 02:37   #14
spiff
Oh noes!
spiff's Avatar
 
Join Date: Mar 2003
Location: Neverland
Posts: 660
The problem should be that the screen hasn't got the colour range/contrast waaay before the number of colours is a problem...
spiff is offline  
Old 16 August 2006, 11:21   #15
redblade
Zone Friend

redblade's Avatar
 
Join Date: Mar 2004
Location: Middle Earth
Age: 33
Posts: 1,049
So Galahad are you happy with just the 4096 colour HAM mode on the Amiga OCS chipset?
redblade is offline  
Old 16 August 2006, 19:38   #16
Galahad/FLT
Going nowhere

Galahad/FLT's Avatar
 
Join Date: Oct 2001
Location: United Kingdom
Age: 44
Posts: 6,606
HAM mode on Amiga was badly implemented, takes up too much DMA time and is useless for anything other than static images.

HAM mode sucks!
Galahad/FLT is offline  
Old 16 August 2006, 19:52   #17
Tony Landais
Zone Friend
 
Join Date: Mar 2003
Location: uk
Posts: 426
In post production we are jumping to 10 bits for HD TV format like movie industry already does.
As far as I know they keep the same 8 bit range for the dark and only use the 2 more bits for the bright.

Probably a good reason for that.

here is a dedicated file format for 10 bits used in film industry
http://www.cineon.com/ff_draft.php
Tony Landais is offline  
Old 16 August 2006, 21:36   #18
Npl
Registered User
 
Join Date: Aug 2004
Location: Vienna / Austria
Age: 38
Posts: 257
Quote:
Originally Posted by Tony Landais
As far as I know they keep the same 8 bit range for the dark and only use the 2 more bits for the bright.
Sounds like the color palette Doom3 uses
Npl is offline  
Old 16 August 2006, 22:44   #19
Qube
Registered User
Qube's Avatar
 
Join Date: Aug 2006
Location: England
Posts: 200
I think DVDs are 24 bpp, and some of them look pretty bad. If you pause you can see loss of colour (dynamic range anyone?), let alone mpeg2 being an old codec, all sorts of artifacts, if you get a smokey scene you are nackered! (aliens - pause and you will weep)

I think the computer has to render an image from a set range in 16M colours (24bpp) or 4B (32bpp). Then the screen screws this up with its own limits. Then the human eye interprets this as pretty low since the eye has a large dynamic range of colour and brightness.

Its a similar game with the digital cameras - firstly the image is limited by colour (24bpp), then by pixels (megapix), then by format (jpeg). Somewhere I read that 35mm film was equivalent to 12 megapixels, maybe more.. So to replace a 35mm cam we should be using 32bpp, 12megapixel cameras, with RAW format? This means big picture files.

The more bits the better, but the larger the data requirement, and more bandwidth required (HDMI v1.3) etc.
Qube is offline  
Old 16 August 2006, 23:14   #20
Tony Landais
Zone Friend
 
Join Date: Mar 2003
Location: uk
Posts: 426
Encoding a film is a real art... but most of the time (old movies or budget release) they do it quick and cheap with basically one encoding setup for the whole movie.
On top of that some DVD players decode and filter better than others.

Hopefully the futur is bright and HD-DVD is able to support HDTV 1920x1080 10 bits format and fix all that... thank you Microsoft for the codec
Tony Landais is offline  
AdSense AdSense  
 


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Workbench colours wilko777 support.Other 3 05 October 2012 16:12
Workbench and colours burf2000 support.Apps 3 31 August 2012 06:14
Something about the colours Maren support.WinUAE 17 21 March 2010 13:16
wb colours source support.Apps 4 31 December 2009 21:00
Workbench Colours Djay support.Apps 9 06 September 2002 15:27

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +2. The time now is 19:40.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Page generated in 0.39259 seconds with 11 queries