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Groups > comp.graphics.apps.gnuplot > #2027

Re: Extract RGB values from image

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On 09.09.2013 19:18, sfeam wrote:

> Please report the version of gnuplot being used.

Version 4.4.3 and 4.6.0

4.4.3 just returns the "i"s, 4.6.0 returns a warning

Warning: empty z range [0:0], adjusting to [-1:1]

and a table like this:

# Surface 0 of 1 surfaces

# Curve title: "ffile binary filetype=png"
# IsoCurve 0, 3871488 points
# x y z type
 0  1703  0 i
 1  1703  0 i
 2  1703  0 i
 3  1703  0 i
...

The third column (not present in 4.4) only contains zeroes. So maybe

splot ffile binary filetype=png with rgbimage

is not the correct plotting command. So which command did you use?


Best wishes,

Ingo

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Thread

Extract RGB values from image Ingo Thies <ingo.thies@gmx.de> - 2013-09-09 15:18 +0200
  Re: Extract RGB values from image sfeam <sfeam@users.sourceforge.net> - 2013-09-09 10:18 -0700
    Re: Extract RGB values from image Ingo Thies <ingo.thies@gmx.de> - 2013-09-11 11:39 +0200
      Re: Extract RGB values from image sfeam <sfeam@users.sourceforge.net> - 2013-09-11 11:08 -0700
        Re: Extract RGB values from image Ingo Thies <ingo.thies@gmx.de> - 2013-09-11 21:36 +0200
          Re: Extract RGB values from image Ingo Thies <ingo.thies@gmx.de> - 2013-09-16 09:02 +0200

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