Results 1 to 11 of 11

Thread: Grayscale?

  1. Jun 23rd, 2001, 10:13 AM #1
    Sastraxi
    Sastraxi is offline

    Thread Starter
    Good Ol' Platypus Sastraxi's Avatar
    Join Date
    Jan 2000
    Location
    Ontario, Canada
    Posts
    5,134

    Grayscale?

    What's the algo. to turn an image into grayscale???
    All contents of the above post that aren't somebody elses are mine, not the property of some media corporation.
    (Just a heads-up)
    Reply With Quote Reply With Quote
  2. Jun 24th, 2001, 03:36 AM #2
    /\/\isanThr0p
    /\/\isanThr0p is offline
    Frenzied Member /\/\isanThr0p's Avatar
    Join Date
    Jul 2000
    Location
    They can't stop us! We're on a misson from God.
    Posts
    1,181
    Hey
    Uhm first I have a question: What is it all about this Chrises ccclub???? who started that? (I probably sound all dumb here now, but I just have no clue)

    Well I guess you can just add up the rbg values and divide them by 3.
    Sanity is a full time job

    Puh das war harter Stoff!
    Reply With Quote Reply With Quote
  3. Jun 24th, 2001, 06:07 AM #3
    parksie
    parksie is offline
    Monday Morning Lunatic parksie's Avatar
    Join Date
    Mar 2000
    Location
    Mashin' on the motorway
    Posts
    8,169
    You could convert the colour values to HSB and then just use the brightness.
    I refuse to tie my hands behind my back and hear somebody say "Bend Over, Boy, Because You Have It Coming To You".
    -- Linus Torvalds
    Reply With Quote Reply With Quote
  4. Jun 24th, 2001, 07:32 AM #4
    Jotaf98
    Jotaf98 is offline
    Frenzied Member Jotaf98's Avatar
    Join Date
    Jun 2000
    Location
    I'm not gonna give you my IP address! Ok... Portugal, South-Western Europe, 3rd rock from the sun (our star is easy to find, a 47 Ursae Majoris in the Milky Way :p )
    Posts
    1,457
    MisanThrop, you forgot to tell him that (R + G + B) / 3 should be dumped in all of the 3 RGB values

    The problem with this algorythm is that it makes the images too dark.
    In real grayscale photos, bright red becomes white.
    But with this algorythm it becomes dark gray. Any idea? This problem has always puzzled me
    Code:
    Temp = Me.GetIQ()
'Error 9: Overflow
'DON'T PANIC! :eek:

    To learn how to use realistic effects in your games like fire, rain, snow and magic effects, read my article on particles systems here.


    Jotaf's Theories!
    "Cats land on their feet. Toast lands peanut butter side down. A cat with toast strapped to its back will hover above the ground in a state of quantum indecision."
    Reply With Quote Reply With Quote
  6. Jun 24th, 2001, 07:42 AM #5
    parksie
    parksie is offline
    Monday Morning Lunatic parksie's Avatar
    Join Date
    Mar 2000
    Location
    Mashin' on the motorway
    Posts
    8,169
    The algorithm you choose depends on the situation. You can average, take the brightness, or just set all the values to their R, G, or B value.
    I refuse to tie my hands behind my back and hear somebody say "Bend Over, Boy, Because You Have It Coming To You".
    -- Linus Torvalds
    Reply With Quote Reply With Quote
  7. Jun 24th, 2001, 07:47 AM #6
    Jotaf98
    Jotaf98 is offline
    Frenzied Member Jotaf98's Avatar
    Join Date
    Jun 2000
    Location
    I'm not gonna give you my IP address! Ok... Portugal, South-Western Europe, 3rd rock from the sun (our star is easy to find, a 47 Ursae Majoris in the Milky Way :p )
    Posts
    1,457
    Yeah, but I wanted one that would adjust itself automatically
    Code:
    Temp = Me.GetIQ()
'Error 9: Overflow
'DON'T PANIC! :eek:

    To learn how to use realistic effects in your games like fire, rain, snow and magic effects, read my article on particles systems here.


    Jotaf's Theories!
    "Cats land on their feet. Toast lands peanut butter side down. A cat with toast strapped to its back will hover above the ground in a state of quantum indecision."
    Reply With Quote Reply With Quote
  8. Jun 24th, 2001, 08:54 AM #7
    Sastraxi
    Sastraxi is offline

    Thread Starter
    Good Ol' Platypus Sastraxi's Avatar
    Join Date
    Jan 2000
    Location
    Ontario, Canada
    Posts
    5,134
    Could you tell me how to change it to it's respective HSB parameters?
    All contents of the above post that aren't somebody elses are mine, not the property of some media corporation.
    (Just a heads-up)
    Reply With Quote Reply With Quote
  9. Jun 24th, 2001, 08:58 AM #8
    parksie
    parksie is offline
    Monday Morning Lunatic parksie's Avatar
    Join Date
    Mar 2000
    Location
    Mashin' on the motorway
    Posts
    8,169
    There's something on PSC somewhere, but my rainbow text program does it:
    Attached Files Attached Files
    I refuse to tie my hands behind my back and hear somebody say "Bend Over, Boy, Because You Have It Coming To You".
    -- Linus Torvalds
    Reply With Quote Reply With Quote
  11. Jun 25th, 2001, 07:04 AM #9
    Jotaf98
    Jotaf98 is offline
    Frenzied Member Jotaf98's Avatar
    Join Date
    Jun 2000
    Location
    I'm not gonna give you my IP address! Ok... Portugal, South-Western Europe, 3rd rock from the sun (our star is easy to find, a 47 Ursae Majoris in the Milky Way :p )
    Posts
    1,457
    (oops I posted on the wrong thread )

    Can you pleas give us the source code?
    Code:
    Temp = Me.GetIQ()
'Error 9: Overflow
'DON'T PANIC! :eek:

    To learn how to use realistic effects in your games like fire, rain, snow and magic effects, read my article on particles systems here.


    Jotaf's Theories!
    "Cats land on their feet. Toast lands peanut butter side down. A cat with toast strapped to its back will hover above the ground in a state of quantum indecision."
    Reply With Quote Reply With Quote
  12. Jun 25th, 2001, 07:27 AM #10
    parksie
    parksie is offline
    Monday Morning Lunatic parksie's Avatar
    Join Date
    Mar 2000
    Location
    Mashin' on the motorway
    Posts
    8,169
    Bugger it. I thought that did have the source *grrrr*

    Ah...I see why...I had two files, same name, different contents
    Attached Files Attached Files
    I refuse to tie my hands behind my back and hear somebody say "Bend Over, Boy, Because You Have It Coming To You".
    -- Linus Torvalds
    Reply With Quote Reply With Quote
  13. Jun 25th, 2001, 10:07 AM #11
    Jotaf98
    Jotaf98 is offline
    Frenzied Member Jotaf98's Avatar
    Join Date
    Jun 2000
    Location
    I'm not gonna give you my IP address! Ok... Portugal, South-Western Europe, 3rd rock from the sun (our star is easy to find, a 47 Ursae Majoris in the Milky Way :p )
    Posts
    1,457
    Heh nice

    I thought that you had used that code to do the color gradations you see here, do you where I can find it?
    Because I wanna make my own that has a new feature... but I'm not sure if it already has it.
    Code:
    Temp = Me.GetIQ()
'Error 9: Overflow
'DON'T PANIC! :eek:

    To learn how to use realistic effects in your games like fire, rain, snow and magic effects, read my article on particles systems here.


    Jotaf's Theories!
    "Cats land on their feet. Toast lands peanut butter side down. A cat with toast strapped to its back will hover above the ground in a state of quantum indecision."
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules


Click Here to Expand Forum to Full Width