I wish Lightroom had the ability to export images by percentage size

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I wish lightroom had the ability to export images by percentage size. That's right, lightroom 3 can't do this. The other competing app can and does it well, and with many canned export presets in place by default.

Some of you may ask why this is important. Well for one thing, customers sometimes asks not for the full resolution of the images, but half the size or a quarter the size. Knowing that the image will be printed small on a page or posted on a website. Also they may not know how it will it be used exactly , but they do know that full resolution is not required. The other issue is file size, sending full resolution images can be problematic for some.

So the question is, what can you do to get this to work in lightroom? Well the answer is Photoshop, are old and trusted friend. As most know, photoshop can reduce image size by percentage.

The solution to get lightroom and photoshop to work together, is with
actions, droplets and lightroom export presets:

1. Create a photoshop Action script to reduce the images.
2. Create a photoshop Droplet to trigger the action
3. Create a Lightroom export preset to trigger the droplet.
4. Destination folder for final images is also required.

Now i'm not going to tell you step by step how to create this workflow in detail here, but there is a great video tutorial posted on AdobeTV.com by the wonderful Julieanne Kost. She shows how to create actions and droplets in photoshop and how to integrate it together with llightroom export presets. Note that the video is not for reducing images by percentage, but the same work flow applies.

Enjoy, Video link below.

http://tv.adobe.com/watch/the-complet...
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Ari I

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  • fine thanks

Posted 7 years ago

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Andrew Rodney

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Agreed (and if it helps, I too have made the request). If one wishes to resize up, it be useful to have LR provide a percentage value and just constrain proportions and be done. Just pop it into sizing in Export.
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Ari I

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Hi Andrew, I'm pleased you responded, I immediately recognized your name.

I can't agree more about having the ability to resize up as well. I love what you said about being done with it. Work flow is very important, and having a kink in the chain can really slow you down. Case in point, we are talking about something that never should have been left out in the first place. Let's hope the Adobe Gods are listening.

Thanks
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Rob Cole

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I don't get it. I mean you can resize upon export in Lightroom, so is the problem that the units are pixels instead of percent? It seems like one would *never* want a percent reduction (or enlargement), since that would give lots of strange results, depending on original/cropped dimensions. Don't you know how big you want them? I just don't get this one I guess...
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Andrew Rodney

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>>I don't get it. I mean you can resize upon export in Lightroom, so is the problem that the units are pixels instead of percent?

Yes, get it? I want to resize say, exactly 250 percent. To do that today, I have to go into Photoshop and figure out the exact pixel dimensions and enter them into the fields. I simply want to have LR export and figure this out for me by specifying I want to size up (or down) and exact percentage.
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Rob Cole

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I get that you can't resize by percentage in Lightroom, I just can't imagine why anybody would want to... (and maybe neither could Adobe, thus its absence...)

PS - Please don't get defensive - I'm sure its just my own ignorance. This is really just a curiosity for me..., but also Adobe may be more likely to add the feature if they have a better feel for the reason for the request.
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Andrew Rodney

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> I just can't imagine why anybody would want to... (and maybe neither could Adobe, thus its absence...)

So LR is the only Adobe app you own? Cause they provide this in at least four other app's I can think of off hand.
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Rob Cole

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So what's the answer to my question?
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Andrew Rodney

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Because LR and ACR do a much better job upsizing than Photoshop (with proper capture sharpening). NO need for 3rd party, expensive and slow plug-ins.
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Ari I

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Hi Andrew, thanks for giving me a hand on this. I think Rob needs to try this out with some images of his own. I think he will get a better understanding on why it's important. Andrew, can you imagine not being able to do this in photoshop all these years!
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Andrew Rodney

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Its kind of hard to believe that someone has no need to resize an image up or down but perhaps that's possible. Assuming one does need to resize an image, its difficult to believe they can't understand the need to size by a percentage off 100%! Or that sizing only by pixels is adequate. As I tried to explain to Rob, Photoshop, InDesign, Aperture and lots of other applications provide a means of interpolating up or down based on a percentage value. And not, I can't imagine not having the ability to size via percentage in Photoshop (or ID).
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Rob Cole

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Nobody is having difficulty understanding the need to resize. I've just never had the need nor desire to do it on a percentage basis. I believe you want to do this - that's never been a question. I also believe its supported in other apps for good reason - I just don't know what the reason is.

PS - this would be a no-brainer plugin for anybody so inclined, but my search for one on the exchange came up empty.
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Mark Sirota

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I'm also in the camp of someone who has never wanted to resize *down* by percentage. I can't come up with a reason I'd ever want to do that. I have, in the past, resized *up* by percentage -- conventional wisdom used to hold that you got better results that way, but I don't do that anymore.
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Rob Cole

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I can see wanting to limit *upsizing* by percentage. I mostly downsize I guess. But the original request was all about downsizing, not upsizing...
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Scott Mahn

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I also like to resize by percentage and have requested this elsewhere for ACR too.

Rob, one reason to resize by percentage is to conveniently match files that were resized that way prior (perhaps there is a client for whom you've always provided files at 150%). Another is to batch process. Lets say you have a project where you need maximum possible files size, and you empirically determine that the most you're willing to uprez is 300% before degradation becomes unacceptable, but your files are not all of the same size or shape. How would you batch uprez them to 300% by pixel dimensions if they start at different sizes?
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Rob Cole

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I get the upsizing, its the percent downsizing that's still got me baffled. Although just needing it for one direction is enough to warrant the feature. - 'nuff for now...
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Andrew Rodney

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Sizing up or down, the use of doing so by a percentage is identical, its hard to believe you say you understand one direction but not the other. Its a bit like saying you understand using the metric of Miles Per Hour for accelerating but not decelerating. Odd. Percentage is just a metric used to produce a desired size. How it makes sense in one direction but not the other seems to come from someone who’s never needed a specific size of an resulting image which is fine. But for those of us that do this ALL THE TIME and use dozens of other products to do so (many created by Adobe), having the ability in LR (like Elements, Photoshop and others) would be useful.
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Rob Cole

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Incredulous as you may be, you still haven't clicked the '+1' button.
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Scott Mahn

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What's needed is less banter and more votes.

Well, more votes anyway. ;-)
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Jeff Schewe

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+1

How's that?
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Scott Mahn

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Thanks Jeff.
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Michael Tomkins

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I too would like to see this added. My exports typically contain lots of cropped images, and I like to export photos for emailing at a clean 50% of their original resolution. (It's my personal feeling that image quality for downsampled images is better on 50% than an odd number like, say, 47.3%.)

As is, there's no way to export cropped photos of wildly varying sizes in this manner -- you get a one-size-fits-all resolution on export, whether it's determined as an overall image bound, a width, a height, or a megapixel number (and the option to prevent upsampling). That means each individual image is scaled to a different degree depending on its cropped resolution, which isn't what I want.

The only way to avoid that is to go through another app, and doing so involves exporting to a lossless intermediate format so my images don't end up being compressed twice, more than defeating the original goal of better quality downsamples.
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Rob Cole

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ExportPercentResize does it.
 

 

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Chris Packrat

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During export, why prevent the use of relative dimensions for the export size?
To date, Lightroom 4.1 offers to resize-on-export with absolute dimensions given in inches, cm, pixel, megapixels or whatever.

Still I couldn't find a way to resize it to 50% in each h/v dimension (that is: 50% width and 50% height, implying a 75% reduction in pixel count).
Or even worse, couldn't find a to specify for example a reduction of 50% in pixel count (effectively resizing by about 70% in each h/v dimension), without having first to sort my photos grouped by megapixels, then exporting them with ad hoc half-megapixel-count value (rounded to the nearest integer, but hey that's life).

The addition of a feature for relative resizing could prove of some use (e.g. to export images at half-res or quarter-res without the need for a calculator at hand for converting % in mpixel count to px in width/height).

Afaik such a feature already implemented in Adobe Photoshop and other hi-tech imaging software (e.g. MS Paint in Windows). I bet the math behind such a resizing feature is not overly difficult - feel free to contact me if you guys at Adobe need some help with the equations, square roots, rounding etc.

This reply was created from a merged topic originally titled
LR 4.1: Allow relative (%) height/width on export.
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dbur

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Yes!!

I was going to paste this request myself. Many times I want a 1/2 or 1/4 output scaling option.
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Rob Cole

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Easily doable now using Exportant plugin (post-process action).
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dbur

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I'll give that a try. Thanks.
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dbur

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'Post'! How did I type paste? I know my brain said post!
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Todd Shaner

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I have just posted a Photoshop Family Feature Request concerning adding ability in Lightroom to read and display the image file EXIF ‘Resolution’ and ability to use it the Export ‘Image Sizing’ panel with capability to ‘Scale by %.” Please review the suggestions, add your comments, and a +1 vote if you feel the changes would be beneficial. Thank you.

http://feedback.photoshop.com/photosh...