gnuplot-beta

Re: "image"-related exotic interoperability question

[Daniel J S. <dan...@ie...>]

Andreas K. Huettel wrote:

>I don't know if this is of interest at all to anyone else, but would it be
>possible without a lot of effort to force gnuplot to output a non-indexed
>rgb bitmap (with three times the size of course)? particularly since this 
>type of image is already produced by other plot commands...
>  
>

Does this seem like an option worth adding to the PostScript terminal?

That is, in PostScript we have image output that can be either indexed 
or a colorimage. The obvious connection is palette-based images are 
indexed, RGB images are colorimage. Would it be worthwhile to have an 
option that forces the type of output image to either always indexed or 
always colorimage? The immediate motivation here is a work-around for a 
problem that may or may not be the terminal drivers fault. I guess that 
may be reason enough, but is there a more legitimate reason for doing this?

It would be easy enough I think to generate a color image from an 
indexed image. Vice-versa might not work so well. The palette would be 
very large. So maybe an option of "indexed" for "set term postscript". 
I've no strong opinion... although I'd sort of like to stick with 
palette being indexed, RGB being color image.

Dan




-- 

Dan Sebald
email: daniel DOT sebald AT ieee DOT org
URL: http://acer-access DOT com/~dsebald AT acer-access DOT com/

Re: "image"-related exotic interoperability question

[Daniel J S. <dan...@ie...>]

Ethan Merritt wrote:

>I didn't see the original message, so I have no context for what
>you guys are talking about here.   My gut reaction is that anybody
>who wants a bitmap image should not be using PostScript in the
>first place. That's why we have a png driver.
>  
>

I like PNG, but sometimes one is forced to use PostScript, e.g., LaTeX.  
Another difference is that with PNG the whole plot is a bitmapped image, 
borders, fonts and all.  With EPS, it is just the image on the plot that 
is indexed; the fonts and lines all remain high res.

Dan

Re: "image"-related exotic interoperability question

[Petr M. <mi...@ph...>]

> >I don't know if this is of interest at all to anyone else, but would it be
> >possible without a lot of effort to force gnuplot to output a non-indexed
> >rgb bitmap (with three times the size of course)? particularly since this
> >type of image is already produced by other plot commands...
>
> Does this seem like an option worth adding to the PostScript terminal?
>
> It would be easy enough I think to generate a color image from an
> indexed image.

Why is this needed? I guess nobody wants to edit the postscript file -- if
you want, that's why the current palette is programmatic.

---
PM

Re: "image"-related exotic interoperability question

[Daniel J S. <dan...@ie...>]

Petr Mikulik wrote:

>> It would be easy enough I think to generate a color image from an
>>
>>indexed image.
>>    
>>
>
>Why is this needed? I guess nobody wants to edit the postscript file -- if
>you want, that's why the current palette is programmatic.
>  
>

People seem to be wondering... so I guess it shouldn't be done.  Case 
closed.

Dan