Number of colours

K
Posted By
Komoku
Sep 25, 2007
Views
616
Replies
12
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Closed
Who could explain to me how I could

– know the number of colors in a picture ? (or greys in case of B&W pictures)

– impose the number of colors in a picture ? (or greys in case of B&W pictures)

Practically, I would like to take a picture (B&W or color), apply the "pixelisation" (in french) command and impose that the squares appear only in six colors (or six levels of grey in the case of B&W pictures).

Thanks

Komoku
Related Tags
color number

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OR
Owen Ransen
Sep 25, 2007
On Tue, 25 Sep 2007 14:12:47 +0200, Komoku
wrote:

Who could explain to me how I could

– know the number of colors in a picture ? (or greys in case of B&W pictures)

– impose the number of colors in a picture ? (or greys in case of B&W pictures)

Practically, I would like to take a picture (B&W or color), apply the "pixelisation" (in french) command and impose that the squares appear only in six colors (or six levels of grey in the case of B&W pictures).

Could you post an example image somewhere?

Easy to use graphics effects:
http://www.ransen.com/
J
jaSPAMc
Sep 25, 2007
Komoku found these unused words:

Who could explain to me how I could

– know the number of colors in a picture ? (or greys in case of B&W pictures)

– impose the number of colors in a picture ? (or greys in case of B&W pictures)

Practically, I would like to take a picture (B&W or color), apply the "pixelisation" (in french) command and impose that the squares appear only in six colors (or six levels of grey in the case of B&W pictures).
Thanks

Komoku

Set Mode to Indexed Colour and then choose the number, however 8 is the minimum!
K
Komoku
Sep 25, 2007
Thank you. It is not exactly what I was looking for but it gives interesting tracks to explore. Thank you very much.

Sir F. A. Rien a écrit :
Komoku found these unused words:

Who could explain to me how I could

– know the number of colors in a picture ? (or greys in case of B&W pictures)

– impose the number of colors in a picture ? (or greys in case of B&W pictures)

Practically, I would like to take a picture (B&W or color), apply the "pixelisation" (in french) command and impose that the squares appear only in six colors (or six levels of grey in the case of B&W pictures).
Thanks

Komoku

Set Mode to Indexed Colour and then choose the number, however 8 is the minimum!

K
Komoku
Sep 25, 2007
Is there a way to know the number of colors in a picture ? (or greys in case of B&W pictures) ? Thanks.
T
Tacit
Sep 25, 2007
In article <46f921a7$0$9221$>,
Komoku wrote:

Is there a way to know the number of colors in a picture ? (or greys in case of B&W pictures) ? Thanks.

In an 8-bit B&W image, the number of greys will be 256, or less. It’s not really useful to know the number of colors in a color image, because it typically will run in the millions.

—
Photography, kink, polyamory, shareware, and more: all at http://www.xeromag.com/franklin.html
B
BubblyBabs
Sep 27, 2007
"Komoku" wrote in message
Who could explain to me how I could

– know the number of colors in a picture ? (or greys in case of B&W pictures)

– impose the number of colors in a picture ? (or greys in case of B&W pictures)

Practically, I would like to take a picture (B&W or color), apply the "pixelisation" (in french) command and impose that the squares appear only in six colors (or six levels of grey in the case of B&W pictures).
Thanks

Komoku

There is a plug-in that will count colors for you in photoshop found on this page:
http://www.telegraphics.com.au/sw/
Direct link is:
http://www.telegraphics.com.au/sw/dl.php3?file=CountColours- 1.1b4-win.zip

Babs
K
Komoku
Sep 27, 2007
Excellent. Thanks. But… how do I install the plug-in now and how do I use it in Photoshop ?

BubblyBabs a écrit :
"Komoku" wrote in message
Who could explain to me how I could

– know the number of colors in a picture ? (or greys in case of B&W pictures)

– impose the number of colors in a picture ? (or greys in case of B&W pictures)

Practically, I would like to take a picture (B&W or color), apply the "pixelisation" (in french) command and impose that the squares appear only in six colors (or six levels of grey in the case of B&W pictures).
Thanks

Komoku

There is a plug-in that will count colors for you in photoshop found on this page:
http://www.telegraphics.com.au/sw/
Direct link is:
http://www.telegraphics.com.au/sw/dl.php3?file=CountColours- 1.1b4-win.zip
Babs

B
BubblyBabs
Sep 28, 2007
"Komoku" wrote in message
Excellent. Thanks. But… how do I install the plug-in now and how do I use it in Photoshop ?

You unzip into your plug-in folder then, within the program choose Filter/Telegraphics/Count Colors…

Babs
K
Komoku
Sep 28, 2007
Great. Thanks.
MR
Mike Russell
Oct 1, 2007
On Tue, 25 Sep 2007 14:12:47 +0200, Komoku
wrote:

Who could explain to me how I could
….
– [set] the number of colors in a picture ? (or greys in case of B&W pictures)

Image>Adjustments>Posterize – will allow you to set the number of colors per channel.
—
Mike Russell – www.curvemeister.com
JF
John Forest
Oct 1, 2007
Irfanview gives this information when you select the information page. It is a free download and is a very powerful program, although not always the easiest to use. You can download it at www.irfanview.com
MR
Mike Russell
Oct 1, 2007
On Tue, 25 Sep 2007 14:12:47 +0200, Komoku
wrote:

Who could explain to me how I could
…
– [set] the number of colors in a picture ? (or greys in case of B&W pictures)

[my reply]
Image>Adjustments>Posterize – will allow you to set the number of colors per channel.

Thinking some more about this, you will get a more posterized effect, similar in appearance to grayscale with a color image color if you convert to Lab mode for the posterization process. Posterize just the Lightness channel and you will get a posterized effect that retains the colors of the original image.
—
Mike Russell – www.curvemeister.com

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