From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: Re: Get the actual width/height of an image Date: Mon, 14 Sep 2020 22:52:59 +0200 Message-ID: <87y2lc3wt0.fsf@ebih.ebihd> References: <28F86650-5F8B-41EC-BC39-54B083B1E394@gmail.com> Reply-To: Emanuel Berg Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="6165"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:r6G/MuvdcI52f66Kl4dt/L3UO+c= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon Sep 14 22:53:44 2020 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kHvTs-0001TM-4y for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 14 Sep 2020 22:53:44 +0200 Original-Received: from localhost ([::1]:59058 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kHvTr-0000LM-6z for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 14 Sep 2020 16:53:43 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:35916) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kHvTJ-0000L4-Rr for help-gnu-emacs@gnu.org; Mon, 14 Sep 2020 16:53:09 -0400 Original-Received: from static.214.254.202.116.clients.your-server.de ([116.202.254.214]:34626 helo=ciao.gmane.io) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kHvTI-0007cB-BM for help-gnu-emacs@gnu.org; Mon, 14 Sep 2020 16:53:09 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1kHvTE-0000fW-F5 for help-gnu-emacs@gnu.org; Mon, 14 Sep 2020 22:53:04 +0200 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Mail-Copies-To: never Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/14 15:49:52 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:124049 Archived-At: Yuan Fu wrote: > There doesn’t seem to be a function to get the > aspect ratio of the image, or the actual pixel > height/width of the image. So can I get > this information? For everything batch and graphics, use ImageMagick. For the specific problem, you can use the command identify(1) which is part of ImageMagick. $ identify zhanna-friske.png zhanna-friske.png PNG 1280x720 1280x720+0+0 8-bit sRGB 835952B 0.000u 0:00.000 You can then parse the output to answer an even more specific question, e.g. what the height is: #! /bin/zsh pic-height () { local img=$1 identify $img | awk '{print $3}' | cut -d 'x' -f 2 } $ pic-height zhanna-friske.png 720 https://dataswamp.org/~incal/conf/.zsh/gfx -- underground experts united http://user.it.uu.se/~embe8573 https://dataswamp.org/~incal