It is very often that one has a need to rotate a bunch of images by 90 or 180 degrees clockwise or otherwise, or resize the same bunch of images to a certain size. Read more to learn how you can do it.\n<\/p>\n
\t<\/p>\n
First of all, you should defenetely install ImageMagick. If you are using any of the modern Linux distributions (like Red Hat Linux 6\/7\/8\/9), most probably you either have it already installed, or it is available on the distribution CD-ROM. If it is not, then you can always download it from http:\/\/www.imagemagick.org\/.<\/p>\n
Now for the fun part:
\n<\/p>\n
\n
\n[leonid@home tmp]$ cd \/home\/leonid\/files\/images
\n
\n[leonid@home images]$ for IMAGE in *.jpg ; do echo Working with $IMAGE ; mv
\n
\n\"$IMAGE\" \"$IMAGE.huge\" ; convert -resize 800x600 \"$IMAGE.huge\" \"$IMAGE\" ; done
\n
\n[leonid@home images]$ rm -f *.huge
\n
\n<\/code><\/p>\n<\/div>\nAlmost the same thing is for rotating. This time, let’s see how it will look in the script file:<\/p>\n
\n
\n#!\/bin\/bash
\n
\n# go into directory with images
\n
\ncd \/home\/leonid\/files\/images<\/p>\n# Repeat steps for each JPEG image in the directory
\n
\nfor IMAGE in *.jpg
\n
\ndo
\n
\n # Do some noise so that we know that it's working
\n
\n\techo Working with $IMAGE
\n
\n\t# Move original image to another file
\n
\n\tmv \"$IMAGE\" \"$IMAGE.huge\"
\n
\n\t# Rotate the backup file and save as original file
\n
\n\tconvert -rotate 90 \"$IMAGE.huge\" \"$IMAGE\"
\n
\ndone<\/p>\n
# Remove backup copies
\n
\nrm -f *.huge
\n
\n<\/code><\/p>\n<\/div>\n
That’s all folks. ImageMagick has a number of other utilities which can do a number of other things. Check them out.<\/p>\n\n","protected":false},"excerpt":{"rendered":"\n
It is very often that one has a need to rotate a bunch of images by 90 or 180 degrees clockwise or otherwise, or resize the same bunch of images to a certain size. 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There are plenty of others, of course, such as fixing colors, changing the appearence, and creative touch.\u2026","rel":"","context":"In "All"","block_context":{"text":"All","link":"https:\/\/mamchenkov.net\/wordpress\/category\/general\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":16134,"url":"https:\/\/mamchenkov.net\/wordpress\/2012\/02\/28\/frankfurt-and-karlsruhe-photos\/","url_meta":{"origin":7364,"position":2},"title":"Frankfurt and Karlsruhe photos","author":"Leonid Mamchenkov","date":"February 28, 2012","format":false,"excerpt":"In November 2009 I went for a PHP conference in Karlsruhe, Germany. \u00a0I've also visited Frankfurt briefly. \u00a0As with most of my travels, I've shot a whole bunch of pictures. \u00a0But unlike my other travel pictures, these ones were waiting for post-processing for way too long. \u00a0Yesterday I abandoned the\u2026","rel":"","context":"In "All"","block_context":{"text":"All","link":"https:\/\/mamchenkov.net\/wordpress\/category\/general\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/mamchenkov.net\/wordpress\/wp-content\/uploads\/2012\/02\/Licher-Beer.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":8001,"url":"https:\/\/mamchenkov.net\/wordpress\/2004\/10\/04\/cd-writing-on-fedora-linux\/","url_meta":{"origin":7364,"position":3},"title":"CD writing on Fedora Linux","author":"Leonid Mamchenkov","date":"October 4, 2004","format":false,"excerpt":"Fedora Linux provides a selection of tools for writing CDs. k3b and xcdroast with nice graphical user interfaces (GUIs). cdrecord and cdrdao for console users. All of these work just fine and have a number of options to fine tune the process. There are few other tools provided in different\u2026","rel":"","context":"In "All"","block_context":{"text":"All","link":"https:\/\/mamchenkov.net\/wordpress\/category\/general\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":7512,"url":"https:\/\/mamchenkov.net\/wordpress\/2004\/05\/18\/fedora-linux-core-2-released\/","url_meta":{"origin":7364,"position":4},"title":"Fedora Linux Core 2 released","author":"Leonid Mamchenkov","date":"May 18, 2004","format":false,"excerpt":"Fedora Linux Coree 2 has been released today by Fedora Project. It features all sorts of tasty things - Linux kernel 2.6, KDE 3.2.2 (GNOME 2.6 for those who prefer it), Xorg 6.7.0, Security Enhanced Linux integration and much more. I am currently downloading it via BitTorrent at 400+ KB\/s.\u2026","rel":"","context":"In "All"","block_context":{"text":"All","link":"https:\/\/mamchenkov.net\/wordpress\/category\/general\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":23796,"url":"https:\/\/mamchenkov.net\/wordpress\/2015\/04\/02\/the-cloud-market-the-most-complete-catalog-of-amazon-ec2-images\/","url_meta":{"origin":7364,"position":5},"title":"The Cloud Market – the most complete catalog of Amazon EC2 images","author":"Leonid Mamchenkov","date":"April 2, 2015","format":"link","excerpt":"The Cloud Market - the most complete catalog of Amazon EC2 images. \u00a0What's even more interesting is their statistics page.","rel":"","context":"In "All"","block_context":{"text":"All","link":"https:\/\/mamchenkov.net\/wordpress\/category\/general\/"},"img":{"alt_text":"the cloud market","src":"https:\/\/i0.wp.com\/mamchenkov.net\/wordpress\/wp-content\/uploads\/2015\/04\/the-cloud-market-500x306.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"jetpack_sharing_enabled":true,"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/posts\/7364","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/comments?post=7364"}],"version-history":[{"count":0,"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/posts\/7364\/revisions"}],"wp:attachment":[{"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/media?parent=7364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/categories?post=7364"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/tags?post=7364"},{"taxonomy":"keyring_services","embeddable":true,"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/keyring_services?post=7364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}