From 41bd0ad58e44244fe67cb36e066d4bb68738516f Mon Sep 17 00:00:00 2001 From: Christian Cleberg Date: Fri, 29 Mar 2024 01:30:23 -0500 Subject: massive re-write from org-publish to weblorg --- content/blog/2022-02-17-exiftool.org | 60 ++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 content/blog/2022-02-17-exiftool.org (limited to 'content/blog/2022-02-17-exiftool.org') diff --git a/content/blog/2022-02-17-exiftool.org b/content/blog/2022-02-17-exiftool.org new file mode 100644 index 0000000..5735125 --- /dev/null +++ b/content/blog/2022-02-17-exiftool.org @@ -0,0 +1,60 @@ +#+title: Stripping Image Metadata with exiftool +#+date: 2022-02-17 +#+description: A simple guide to remove exif data with exiftool. +#+filetags: :privacy: + +** Why Strip Metadata? +Okay, so you want to strip metadata from your photos. Perhaps you take +pictures of very rare birds, and the location metadata is a gold mine +for poachers, or perhaps you're just privacy-oriented like me and prefer +to strip metadata from publicly-available images. + +There are various components of image metadata that you may want to +delete before releasing a photo to the public. Here's an incomplete list +of things I could easily see just by inspecting a photo on my laptop: + +- Location (Latitude & Longitude) +- Dimensions +- Device Make & Model +- Color Space +- Color Profile +- Focal Length +- Alpha Channel +- Red Eye +- Metering Mode +- F Number + +Regardless of your reasoning, I'm going to explain how I used the +=exiftool= package in Linux to automatically strip metadata from all +images in a directory (+ subdirectories). + +** Installing =exiftool= +First things first: we need to install the tool. I'm running Debian 11 +on my server (Ubuntu will work the same), so the command is as simple +as: + +#+begin_src sh +sudo apt install exiftool +#+end_src + +There are different tools that can accomplish the same thing across +distributions, but I really only care to test out this one package. + +** Recursively Strip Data +I actually use this tool extensively to strip any photos uploaded to the +website that serves all the images for my blog (=img.cleberg.net=). + +The following command is incredibly useful and can be modified to +include any image extensions that =exiftool= supports: + +#+begin_src sh +exiftool -r -all= -ext jpg -ext png /path/to/directory/ +#+end_src + +See below for the results of my most recent usage of =exiftool= after I +uploaded the image for this blog post. You can see that the command will +let you know how many directories were scanned, how many images were +updated, and how many images were unchanged. + +#+caption: exiftool results +[[https://img.cleberg.net/blog/20220217-stripping-metadata-with-exiftool/exiftool.png]] -- cgit v1.2.3-70-g09d2