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Re: Write PNG from plots with different color tables?? [message #70011 is a reply to message #69873]

Wed, 03 March 2010 11:16

Mark Shephard
Messages: 13
Registered: July 1999

Junior Member

On Mar 3, 10:14 am, "ben.bighair" <ben.bigh...@gmail.com> wrote:
> On Mar 2, 2:30 pm, Mark Shephard <mark.w.sheph...@gmail.com> wrote:
>
>
>
>
>
>> Hi PP,
>
>> Thanks for the prompt response. I had already tried what you
>> suggested. When I do so I get a very strange result. The top half is
>> completely black and the bottom half has the plot repeated three times
>> (still using just one of the color tables).
>
>> ----------------
>> | |
>> | BLACK |
>> | |
>> ----------------
>> | |
>> | P1 P1 P1 |
>> | |
>> ----------------
>
>> Any thoughts?
>
>> Thanks,
>> Mark
>
>> On Mar 2, 2:06 pm, pp <pp.pente...@gmail.com> wrote:
>
>>> On Mar 2, 3:51 pm, Mark Shephard <mark.w.sheph...@gmail.com> wrote:
>
>>>> image = tvrd()
>>>> write_png, file_out, image, r, g, b
>
>>> Do it without color tables instead:
>
>>> image=tvrd(true=1)
>>> write_png,file_out,image
>
> Hi,
>
> What happens if you use David Fanning's handy TVREAD rather than IDL's
> built-in TVRD?
>
> http://dfanning.com/color_tips/strange_tvrd.html
>
> Ben- Hide quoted text -
>
> - Show quoted text -

Hi Guys,

THAT WORKS!!!

Thank you very much for all the help.

I set:
DEVICE, set_pixel_depth=24
TVRD(true=1)

David Fanning explaination of TVRD issues was also very helpful. I
also tried his TVREAD(), but it had the same issue as TVRD()....until
I set the pixel depth in the device. This might be due to the fact
that I am using the Z-buffer.

Thanks again for all the help,
Mark

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[Message index]

		Write PNG from plots with different color tables?? By: Mark Shephard on Tue, 02 March 2010 10:51
		Re: Write PNG from plots with different color tables?? By: penteado on Wed, 03 March 2010 13:17
		Re: Write PNG from plots with different color tables?? By: David Fanning on Wed, 03 March 2010 11:48
		Re: Write PNG from plots with different color tables?? By: Mark Shephard on Wed, 03 March 2010 11:16

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