I believe the problem is GD previous to version 2.0.1... They could only
create images with indexed (256?) colors...
I had a PHP script that used GD to resize JPEGs to smaller thumbnails
automatically... And it would always reduce them to 256 colors, until I
upgraded to PHP 4.0.6, GD 2.0.1, and used ImageCreateTrueColor()
--Matt
-----Original Message-----
From: SED [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, July 10, 2001 9:17 PM
To: 'James Cox'; [EMAIL PROTECTED]
Subject: RE: [PHP] How to add a new color to JPEG
I'm not sure I follow. I know this is how I would do it if I had a
GIF-image, but this does not include JPEG. That’s the main issue. The
JPEG is saved as an RGB-image, not index colored like GIF, therefore I'm
asking about how to add a RGB color to a non-index-color-image (JPEG).
Are you sure you are talking about JPEG, not GIF?
SED
-----Original Message-----
From: James Cox [mailto:[EMAIL PROTECTED]]
Sent: 10. júlí 2001 23:28
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: RE: [PHP] How to add a new color to JPEG
That's something you would need to do in photoshop.
open your image, select save for web, look to the left of the image, you
should see some buttons and a black box. you need to click on the black
box, select the yellow you want, and then click ok. Then, click the
button above the yellow - that will select the eyedropper. Then, go to
the color palette opposite. click on the 3rd icon underneath it, which
allows you to add eyedropper color to the palette.
That should work. mail me if you get stuck, with your image
dimensions/copy of image.
James
> -----Original Message-----
> From: SED [mailto:[EMAIL PROTECTED]]
> Sent: 11 July 2001 00:21
> To: 'James Cox'; [EMAIL PROTECTED]
> Subject: RE: [PHP] How to add a new color to JPEG
>
>
> How can I add colors to JPEG-palette? I never new It had a special
> palette (until now :).
>
> -----Original Message-----
> From: James Cox [mailto:[EMAIL PROTECTED]]
> Sent: 10. júlí 2001 22:38
> To: Jeff@Hyrum. Net
> Cc: [EMAIL PROTECTED]; Php-General@Lists. Php. Net
> Subject: RE: [PHP] How to add a new color to JPEG
>
>
>
> hmm.
>
> If what I understand from your ImageColorClosest(); function, why
> don't you just add yellow to the palette? that way it can be found by
> the function, but isn't used in the image?
>
> HTH,
>
> James Cox
>
> apologies jeff for sending it twice to you :)
>
> > -----Original Message-----
> > From: Jeff Lewis [mailto:[EMAIL PROTECTED]]
> > Sent: 10 July 2001 23:00
> > To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
> > Subject: RE: [PHP] How to add a new color to JPEG
> >
> >
> > Hmm, I create my image from scratch and haven't tried drawing on an
> > existing pallette. If your start image is always a blank black box
> > you could always create it on the fly...
> >
> > > -----Original Message-----
> > > From: SED [mailto:[EMAIL PROTECTED]]
> > > Sent: Tuesday, July 10, 2001 1:52 PM
> > > To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
> > > Subject: RE: [PHP] How to add a new color to JPEG
> > >
> > >
> > > That’s the problem, if I do that and the color is not used before
> > > in
>
> > > the image, I get only the closest match. Note, if I add a yellow
> > > pixle into the JPEG-image with Photoshop, save it and try it
> > > again, then I can use the yellow for my text. However, I don’t
> > > want to have
>
> > > the yellow dot in my picture, only a yellow text.
> > >
> > > SED
> > >
> > > -----Original Message-----
> > > From: Jeff Lewis [mailto:[EMAIL PROTECTED]]
> > > Sent: 10. júlí 2001 17:26
> > > To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
> > > Subject: RE: [PHP] How to add a new color to JPEG
> > >
> > >
> > > Could try this:
> > >
> > > $blue = ImageColorAllocate($image, 0, 0, 255);
> > >
> > > Substitue blue for yellow and you'll be the appropriate RGB values
> > > for the numbers.
> > >
> > > Jeff
> > >
> > > > -----Original Message-----
> > > > From: SED [mailto:[EMAIL PROTECTED]]
> > > > Sent: Tuesday, July 10, 2001 1:27 PM
> > > > To: [EMAIL PROTECTED]
> > > > Subject: [PHP] How to add a new color to JPEG
> > > >
> > > >
> > > > Lets say I have a black JPEG-image and I want to add yellow text
> > > > to it, how can I define the yellow color?
> > > >
> > > > According to the manual, you can only get closest value of your
> > > > desired color by letting the ImageColorClosest() find it.
> > > > Therefore, if the image is totally black, you can not get the
> > > > yellow color. I have not found a way to do this though I believe
> > > > I
>
> > > > have tried everything. And yet, I have not found any documents
> > > > covering this other than PHP-manual.
> > > >
> > > > Do you know of a way to do this? Or do you know of other
> > > > manuals/tutorials covering this issue?
> > > >
> > > > Regards,
> > > > Sumarlidi Einar Dadason
> > > >
> > > > SED - Graphic Design
> > > >
> > > > ------------------------------------------
> > > > Phone: (+354) 4615501
> > > > Mobile: (+354) 8960376
> > > > Fax: (+354) 4615503
> > > > E-mail: [EMAIL PROTECTED]
> > > > Homepage: www.sed.is
> > > > ------------------------------------------
> > > >
> > > >
> > > >
> > > >
> > > >
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