Best way to quickly resize images?

jpeters1734 · 12-02-2016, 08:29 PM

I have a bunch of logos that I need to resize to 150x150 and for some reason, my Mac's Viewer won't let me edit the size and save to the same file. It wants to create a copy of it somewhere else. I've confirmed it's not a permissions issue. What's the easiest and fastest way to get the logos resized?

txranger · 12-02-2016, 11:15 PM

I use FastStone Photo Resizer... Its free and there should be a version for Mac... It can do a lot more than just resize...

robwondah · 12-03-2016, 12:04 AM

GIMP is another good free Mac software for editing. But if you want to stay using Mac's Preview app, you should be able to go to Tools > Adjust Size. Then input 150 x 150 pixels. Then to save go to File > Export and save as a PNG. Also make sure that 'Alpha' is checked (assuming the logos have transparent backgrounds).

jpeters1734 · 12-03-2016, 12:35 AM

how fast are those programs? from load up to save?

txranger · 12-03-2016, 11:32 AM

FastStone seems to go pretty quickly imo, depending on the size and original format of the file you are resizing... It can do multiple files at the same time and can save in different formats and rename them if you so desire...

eriqjaffe · 12-03-2016, 01:56 PM

I'm a big fan of ImageMagick for batch operations. It's a command-line tool, so you need to have some comfort in the terminal. But it's crazy powerful, I actually use it behind the scenes to do some image manipulation in the Jersey and Cap Makers.

Cactuslab · ImageMagick installer for Mac OS X

Once it's installed, it's pretty simple. Open up a terminal, navigate to the folder where all your PNGs are and enter this:

Code:

magick mogrify -resize 150x150 -background transparent -gravity center -extent 150x150 -format png *.png

And that should do it nice and quick - on my laptop I can process a folder with hundreds of images in seconds. It'll also make sure that the final images are centered in a 150x150 transparent square, so it'll even handle oddly-sized images. It's a good idea to make a backup copy of your images before doing that just in case, because there's no going back once you've done it.

jpeters1734 · 12-04-2016, 12:04 AM

Quote:

Originally Posted by eriqjaffe

I'm a big fan of ImageMagick for batch operations. It's a command-line tool, so you need to have some comfort in the terminal. But it's crazy powerful, I actually use it behind the scenes to do some image manipulation in the Jersey and Cap Makers.

Cactuslab · ImageMagick installer for Mac OS X

Once it's installed, it's pretty simple. Open up a terminal, navigate to the folder where all your PNGs are and enter this:

Code:

magick mogrify -resize 150x150 -background transparent -gravity center -extent 150x150 -format png *.png

And that should do it nice and quick - on my laptop I can process a folder with hundreds of images in seconds. It'll also make sure that the final images are centered in a 150x150 transparent square, so it'll even handle oddly-sized images. It's a good idea to make a backup copy of your images before doing that just in case, because there's no going back once you've done it.

Oh my! I think that's what I need. I'll have to figure out how to use it. Will it do files that are in sub folders?

eriqjaffe · 12-04-2016, 01:09 PM

Quote:

Originally Posted by jpeters1734

Oh my! I think that's what I need. I'll have to figure out how to use it. Will it do files that are in sub folders?

I'm not sure if it can do recursive folders by itself, but you might be able to do some scripting or possibly piping the output of a "find" command.

12-02-2016, 08:29 PM	#1
jpeters1734 Hall Of Famer Join Date: Jun 2014 Location: Juust a bit outside... Posts: 6,216	Best way to quickly resize images? I have a bunch of logos that I need to resize to 150x150 and for some reason, my Mac's Viewer won't let me edit the size and save to the same file. It wants to create a copy of it somewhere else. I've confirmed it's not a permissions issue. What's the easiest and fastest way to get the logos resized? Attached Images __________________ "Cannonball Coming!" Go Bucs!! Founder and League Caretaker of the Professional Baseball Circuit, www.probaseballcircuit.com An Un-Official Guide to Minor League Management in OOTP 21 Ratings Scale Conversion Cross-Reference Cheat Sheet

12-02-2016, 11:15 PM	#2
txranger Hall Of Famer Join Date: Dec 2008 Location: "Deep in the Heart Of" Posts: 8,325	I use FastStone Photo Resizer... Its free and there should be a version for Mac... It can do a lot more than just resize... __________________

12-03-2016, 12:35 AM	#4
jpeters1734 Hall Of Famer Join Date: Jun 2014 Location: Juust a bit outside... Posts: 6,216	how fast are those programs? from load up to save? __________________ "Cannonball Coming!" Go Bucs!! Founder and League Caretaker of the Professional Baseball Circuit, www.probaseballcircuit.com An Un-Official Guide to Minor League Management in OOTP 21 Ratings Scale Conversion Cross-Reference Cheat Sheet

12-03-2016, 11:32 AM	#5
txranger Hall Of Famer Join Date: Dec 2008 Location: "Deep in the Heart Of" Posts: 8,325	FastStone seems to go pretty quickly imo, depending on the size and original format of the file you are resizing... It can do multiple files at the same time and can save in different formats and rename them if you so desire... __________________

12-03-2016, 01:56 PM	#6
eriqjaffe Hall Of Famer Join Date: May 2003 Location: Under The Christmas Fish Posts: 7,642	I'm a big fan of ImageMagick for batch operations. It's a command-line tool, so you need to have some comfort in the terminal. But it's crazy powerful, I actually use it behind the scenes to do some image manipulation in the Jersey and Cap Makers. Cactuslab · ImageMagick installer for Mac OS X Once it's installed, it's pretty simple. Open up a terminal, navigate to the folder where all your PNGs are and enter this: Code: magick mogrify -resize 150x150 -background transparent -gravity center -extent 150x150 -format png .png And that should do it nice and quick - on my laptop I can process a folder with hundreds of images in seconds. It'll also make sure that the final images are centered in a 150x150 transparent square, so it'll even handle oddly-sized images. It's a good idea to make a backup copy of your images before doing that just in case, because there's no going back once you've done it. __________________ Last edited by eriqjaffe; 12-03-2016 at 01:58 PM.*

12-03-2016, 12:04 AM	#3
robwondah Minors (Triple A) Join Date: Oct 2014 Location: Los Angeles, CA Posts: 287	GIMP is another good free Mac software for editing. But if you want to stay using Mac's Preview app, you should be able to go to Tools > Adjust Size. Then input 150 x 150 pixels. Then to save go to File > Export and save as a PNG. Also make sure that 'Alpha' is checked (assuming the logos have transparent backgrounds).