Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: Ingo Thies Newsgroups: comp.graphics.apps.gnuplot Subject: Re: Extract RGB values from image Date: Wed, 11 Sep 2013 11:39:47 +0200 Lines: 33 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Trace: individual.net +JFiZRipcqUzORsKtpWVpQpwGs52I1sVABeDMfUhB13t9L8KQQ Cancel-Lock: sha1:IN18U4cMhriGXMIhzMPOqOn2Rko= User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130804 Thunderbird/17.0.8 In-Reply-To: Xref: csiph.com comp.graphics.apps.gnuplot:2027 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