Or you could just use the built in Photoshop tool: File -> Automate -> Fit Image...

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Just use 'sips -Z [size]' on the images... it has the same effect.

Be warned though that it replaces the image with the scaled one... so be careful to only work on copies.


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Or you can use ImageMagick if you have it installed.

The following will resize an image if it is larger than the given size while retaining the image proportions. If you always want to resize the image (ie. enlarge an image if it is smaller than the given dimensions) omit the ">".

convert -resize "100x100>" image.jpg image-thumb.jpg

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i am jack's amusing sig file

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This is true, but patniemeyer's suggestion doesn't require installing ImageMagick (sips is an interface to Apple's Image Events processing system).

Just type sips -Z 100 image.jpg --out image-thumb.jpg to achieve the same result as your command.

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Just a question...
In Adobe ImageReady CS2, the Image Size setting allows you to constrain by width or height and not enlarge the image if the original size is smaller than the constrain width/height. Is there an equivalent resize tool in Photoshop CS3?

Here's a screenshot from ImageReady (note the Do Not Enlarge checkbox):
http://img106.imageshack.us/img106/6618/imagesizezl3.png

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Sounds very useful to me but I am a newbie to scripts. Can someone fill me in on how to setup this script? Tried various adjustments but cannot get it to work. Could someone tell me how to modify it for say a longest side of 400 pixels...

I take it the finished script goes in Photoshop/Presets/Scripts...

Thanks in advance!

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I think is better not to use Photoshop to do the resize when you have "Image Events" in the Mac Os X.

Here is a variation on the code found here (http://schinckel.net/2006/03/04/resizing-images-in-applescriptautomator/) but to handdle multiple files:

---------------------------------------------------
global theImage

tell application "Finder"
set sels to selection
end tell

set theResult to display dialog "Select the short side size." default answer "450"
set theAnswer to text returned of theResult
-- Retrieve the resize percentage amount
set theNewWidth to theAnswer as integer

repeat with sel in sels
set theImage to sel as alias

tell application "Finder"
set theImageName to name of theImage as string
set theImageFolder to (folder of theImage) as string
end tell

set theResizedImagePath to theImageFolder & theImageName & "_RESIZED" as string

tell application "Image Events"
launch
set theImage to open theImage

-- This is the tricky part: you need to keep the ratio of the original picture
copy dimensions of theImage to {currentWidth, currentHeight}
set ratio to theNewWidth / currentWidth

tell theImage
scale by factor ratio to size theNewWidth
save in theResizedImagePath
close
end tell
end tell
end repeat
---------------------------------------------------


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Automator has this built into the resize image function, and its really handy. I drag stuff out of iphoto to the desktop, then have the resize image function as a contextual menu item. - should be built into email!

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i second spicyj's use of sips. it's quicker and easier than these applecsripts, which probably use sips to do the conversions anyway.

for more, check the sips man page

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is it possible to have an automater script that will convert nef files into jpg files but always keep the output file under 1mb ?

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An easy way to do this with photoshop batch/actions is to use the

File > Automate > Fit Image... command instead. This allows you to set the maximum size of your images in both directions (to achieve what you are doing set both values to the same number).

Much less trouble!

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