echo -n | md5sum
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/ lossy_jp2_psnr_43
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November 1, 2018 19:10
OpenJPEG, JPEG200 lossy compression encoding example with quality set to 42 decibels
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| opj_compress -i <input.tif> -o <output.jp2> -p RLCP -t 1024,1024 -EPH -SOP -OutFor jp2 -I -q 42 |
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/ md5_of_text_sting_commandline.md
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May 10, 2018 17:29
pushing a text string through a pipe to md5sum requires echo's -n switch which prevents echo from outputting a trailing newline
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/ file_type_inventory.R
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September 6, 2019 20:24
Generate an inventory of file types found in a filesystem
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| pacman::p_load( | |
| readr, | |
| httr, | |
| jsonlite, | |
| curl, | |
| stringr, | |
| dplyr, | |
| xtable, | |
| formattable, | |
| htmlTable, |
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/ transferImageTechnicalMetadata
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October 2, 2018 14:04
Transfer image technical metadata from source file to JP2 derivative #exiftool
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| exiftool -ext tif -tagsfromfile @ -srcfile %f.jp2 [directory name] -XMP:format= -ImageHistory='Image technical metadata values were copied (via exiftool) from a source image to this derivative JP2 copy.' -overwrite_original |
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/ mogrify_convert.md
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November 29, 2023 11:28
Convert all the JP2 images in a directory to JPEGs using GraphicsMagick's Mogrify; crop image edges with Imagemagick's Convert
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/ countValidJP2
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July 29, 2020 20:15
How to count the number of JPEG2000 files found to be valid using jpylyzer
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| jpylyzer *jp2 | grep --extended-regexp "<isValid format=\"jp2\">True</isValid>" | wc --lines |
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/ exiftool_csv.md
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November 26, 2025 14:35
Use exiftool to generate table of image data in CSV format
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| sudo apt-get update; sudo apt-get upgrade -y ;sudo apt-get install -y curl zstd webp glabels lynx cifs-utils gpa gnupg2 libpam-google-authenticator network-manager-openconnect-gnome build-essential libjpeg-dev default-jre network-manager-vpnc network-manager-vpnc-gnome tree liblcms2-dev libtiff-dev libpng-dev libopenjp2-tools enscript libtiff-tools imagemagick jasper httpie cups cmake imagemagick leptonica-progs autoconf-archive libpng-dev libleptonica-dev tesseract-ocr golang-go hugo pandoc shotwell tesseract-ocr-all graphicsmagick feh autokey-gtk gimp liblcms2-dev libtiff-dev libpng-dev libz-dev git maven file default-jdk openssh-server python3-jpylyzer pqiv p7zip-full net-tools xterm git-lfs tasksel slim lightdm ; sudo tasksel install lubuntu-core libheif1 libheif-dev | |
| # Installing X11 on Linux, see: https://phoenixnap.com/kb/how-to-install-a-gui-on-ubuntu | |
| sudo apt-get install curl -y ; export CLOUD_SDK_REPO="cloud-sdk-$(lsb_release -c -s)"; echo "deb http://packages.cloud.google.com/apt $CLOUD_SDK_R |
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/ convert tiff to 8 bits per channel
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April 28, 2023 19:27
Using graphicsmagick, convert a directory of TIFF files into uncompressed 8 bit per channel TIFF files
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| gm mogrify -format tif -compress none -define tiff:bits-per-sample=8 *.tif | |
| mogrify -format tif -depth 8 *.tif |
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/ siegfried_PRONOM.txt
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September 30, 2018 11:03
Siegfried PRONOM file identification commandline tool #DROID
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| # Identify all files and subdirectories within ~/images dir, generate md5 checksums for each file and save output as CSV | |
| sf -hash md5 -csv ~/images > ~/images/sf.csv |
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