Re: [Gnuplot-info] Display Image using gnuplot...

[Thomas S. <t.s...@fz...>]

as you can see in the demo gallery

http://gnuplot.sourceforge.net/demo/image.html

in 3d only 'image' works, not 'rgbimage'.

also see the end of the section '43.59.8.18 Rgbimage' in the gnuplot manual.

that means, greyscale images are possible, but not color images,
unless you are able to have all the colors you need within one palette
(see 'set palette rgbformulae') and convert your image from rgb into
an image where each pixels only contains one value which addresses
the corresponding color in the palette (sounds complicated...).


Soon wrote:
> 
> Thanks so much! I'm able to display the image now. But I still have 1 more
> question: How to display a 2D image in a 3D space?
> 
> To display 2D image, I use the folowing command:
> plot 'Image.bin' binary array=308x785:785x308 format='%uchar' dx=2:1
> dy=1:2 origin=(0,0):(785,785) w rgbimage
> 
> But when I modify the command in order to display it in 3D:
> splot 'Image.bin' binary array=308x785x100:100x785x308 format='%uchar'
> dx=2:1 dy=1:2 dz=2:1 origin=(0,0,0):(785,785,785) w rgbimage
> 
> It showed error: "Currently do not support sampled array dimensions
> greater than 2"
> 
> What does it means? Thanks ya =)
> 
> 
> Thomas Sefzick wrote:
>> 
>> for a bmp-file (named 'ts.bmp') with size 320x240 the plot-command would
>> be:
>> 
>> plot "< bmptopnm ts.bmp | tail -n 1" binary array=320x240 format="%uint8"
>> flipy with rgbimage
>> 
>> (i'm using gnuplot 4.3)
>> 
>> 
>> Soon wrote:
>>> 
>>> I have downloaded the netPbm v10.27, so how do I call the netpbm
>>> programs from gnuplot? Thanks again =) 
>>> 
>>> 
>>> Thomas Sefzick wrote:
>>>> 
>>>> convert the images (with e.g. some 'netpbm' package programs) into
>>>> something readable by gnuplot (see 'show datafile binary filetypes')
>>>> and then plot it with
>>>> plot 'filename' binary ... with rgbimage
>>>> 
>>>> 
>>>> Soon wrote:
>>>>> 
>>>>> Hi... Can anyone please enlighten me on how can I use gnuplot to
>>>>> display images of BMP/PNG format? I am using gnuplot version 4.2.
>>>>> Thanks ya =)
>>>>> 
>>>> 
>>>> 
>>> 
>>> 
>> 
>> 
> 
> 

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