Lightroom: Ability to show cropping info in pixels, cm, or inches

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  • Updated 6 years ago
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LR4 Requests: 1. Image resize feature as in PS.
2. While cropping with info displayed, the option to select pixels, cm, or inches from the 'crop dimensions' selection of the info view selection panel.
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Joel Kiblen

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Posted 7 years ago

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Rikk Flohr, Champion

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Until your image is exported and assigned a resolution, cm and inches are not relevant measures.

All image resizing is handled in the Export dialog and is a much nicer (and more powerful) dialog than the PS dialog.
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Oliver Wendel

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Hi Rikk,

I disagree, partly ;-) . The RAW files have a "native" resolution in my understanding and cropping to a designated x by y pixels would help.

You're right in the respect of using cm, inches etc.

But: Why not enter an output resolution in the crop dialog (e.g. 300 ppi for printing) and get the information on the size you are cropping the image to in cm, inch or what ever.

Many fine art printer guys seem very particular about resolution, scaling images etc.

Oli
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Rikk Flohr, Champion

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Native resolution of a Raw file is its pixels divided by its sensor's dimensions.

ie. a Canon 5DMKII file is 5616 pixels in a sensor 36mm wide. That yields a native resolution of 3962 pixels per inch. For the photographer, this is practically a meaningless number which has little to do with output.

Until a file is exported (and then only if to a format destined to physical (not digital) media), resolution is not used. The Output dialog handles this for you and ensures that regardless of your cropping precision, you receive the dimensions and resolution you request-properly scaled and sharpened.

Lightroom allows you to crop to an aspect that can be output to many sizes for many purposes and you only have to crop it once. Those 'fine art' printer guys needs are more than satisfied by the controls in the Output dialog.
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Joel Kiblen

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I can see the usefulness of the export function if I'm sending a pic to someone, or displaying the image on the web. If I just want to print, It's another set of steps to export, then re-import a jpeg rather than the raw image. Unless I pick an aspect ratio that's equivlent to that of my camera, I'm left with few media choices unless I want to clip the image in the printout. My camera uses a 3:2 image dimension. How do I print full image borderless on an 8x10, 8.5x11, or 11x14 sheet without adding the additional steps?
Thanks
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Rikk Flohr, Champion

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It is not necessary to export and reimport. Your Print module is more than capable of generating the content-borderless on whatever size paper you wish. However- you cannot print a 3:2 captured image onto a 4:5 ratio paper (8x10) without:

Stretching one dimension or
Compressing another dimension or
Cropping off pieces of the image or
leaving white letterbox spacing

It has been that way since the first days of film.

The solution is to crop to your paper's aspect ratio and then print it or
not crop it and let the Print module decide what is chopped off or what extra space is letter-boxed by the choices you make in the Print module. .

There is never a need to reimport to print borderless.
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Oliver Wendel

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@Rikk

Right! You can set a resolutiuon when exporting or printing. This will lead to a "size" of the image, depending if displayed on a screen or printetd with a defined resolutuin. But I don't "trust" in LR's ability to Scale (up or down) images.

The idea is: While using the crop tool, entering a desired output resolution for e.g. printing, the dialog could show a paper size that can be used when priniting without scaling by LR, printer driver or RIP.
I hope my idea is clear... English is not my native language ;-)

Oli
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Rikk Flohr, Champion

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Oli,

Learn to trust LR's ability to scale. It does a magnificent job. I used PS and Alien Skin's Blow up for years and realized, after careful testing, that Lightroom does it pretty well. Test it yourself.
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Oliver Wendel

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Rikk,

I'll keep it short because I don't want to detour from the original subject.

I'm new to 'fine art printing' and so far I trusted books and posts in www groups that recommend not to go with LR but use PS scripts for scaling. The software Mirage does a good job on scaling aswell. Testing on fine art paper is expensive...

While printing more often I think I'll come to know what image size (resolution) is suitable for which output format (blow up the image x1.2, x1.5, 2 or whatever) .

But still I think not to scale an image (and chosing the right frame while shooting in the first place) is best when putting out on a printer.

Oli
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Joel Kiblen

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Yes, you are correct. I begin to see more of these details as I use LR more.
I still think it would be a useful feature to have the option to select in, cm, or aspect ratio to display in the 'crop dimensions' info display while doing a 'manual crop'.
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Tucker Steinmetz

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It certainly isn't intuitive. I downloaded this to make a simple adjustment of an image in inches. Why doesn't Adobe make that process obvious and simple?
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Lee Jay

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Because a digital image has no inches. It just has pixels.