How do I resize after cropping?

I usually crop my images, sometimes 50% or more, and then I just save the cropped images. In reading some of the threads they were talking about resizing after cropping spirit to show my lack of experience in this what exactly are they saying and how do I do it I use Lightroom and Photoshop.

1. If you start with JPG file, and then crop, you throw away what is cropped...lost forever! So to change the aspect ratio for a different print size (e'g. changing 5x7 (1.4:1) ratio to 13x19 ratio (1.46:1) would require a recrop to get the aspect ratio correct...throw MORE away!

2. If you are simply PRINTING a DIFFERENT SIZE, you can merely send in the JPG file to your lab and tell them,
I want one 5x7 print and one 13x19 print, if you are willing to let them decide what has to 'fall off' one direction of the print in order to get it to fit the paper. But if the content of the frame does not permit such indescriminate cropping by the lab,


3. If, instead of shooting JPG, you shoot RAW files,

in LR or other RAW conversion program you can 'trim' the RAW into whatever aspect ratio you want and then output a JPG file for your lab;


you can then 'untrim' at a later time, and 'retrim' it to a totally different aspect ratio before telling it to output a different JPG file.

Using a RAW conversion program is 'non destructive'...nothing is 'thrown away'...you can undo any change, simply because no change is ever made! A RAW conversion program simply keeps a list of parameters as actions to perform upon the original RAW file, but the RAW file itself is never changed.

Agree with Wilt. Keep the RAW and recrop/resize to whatever size you want and export a new JPG.

Photoshop has a checkbox that says “delete cropped pixels”. If you leave that unchecked and then save a cropped image, You can always go back and uncrop it and your original picture information will still be there.

Good to learn that Photoshop has acquired some 'non destructive' capabilities.
Am I right in presuming that what you described about aspect ratio alterations

1. applies to RAW files AND JPG files?!
   
2. or to RAW and PSD files but not JPG?
   

Wilt wrote in post #19024776
Good to learn that Photoshop has acquired some 'non destructive' capabilities.
Am I right in presuming that what you described about aspect ratio alterations

1. applies to RAW files AND JPG files?!
   
2. or to RAW and PSD files but not JPG?
   

I don't think it is possible to edit and then overwrite a raw file.

Archibald wrote in post #19024779
I don't think it is possible to edit and then overwrite a raw file.

The fundament concept is that a RAW file is NEVER 'worked on'...a set of data is created from the RAW by a RAW convertor like Lightroom or Photoshop or Capture One, and you 'work on' THAT extracted data, but the original data is still intact as originally stored

That is why I can take an original RAW image shot with 1.5:1 aspect ratio in a dSLR, and then extract from that single file

• 6x4 print (1.5:1)
  
• 19x13 print (1.46:1)
  
• 7x5 print (1.4:1)
  
• 14x11 print (1.47:1)
  
• 10x8 print (1.25:1)
  
• 12x8 print (1.5:1)
  
• 60x20" print (3:1)
  

Wilt wrote in post #19024789
The fundament concept is that a RAW file is NEVER 'worked on'...a set of data is created from the RAW by a RAW convertor like Lightroom or Photoshop or Capture One, and you 'work on' THAT extracted data, but the original data is still intact as originally stored

So why did you comment about PS's non-destructive properties with regards to raw files? No regular editing program can overwrite raw files.

Wilt,

Jeff isn't asking about cropping, or aspect ratios, nor the difference between destructive edits and nondestructive edits.

He is only asking about resizing.

Resizing means to change the pixel dimensions of the image.

In other words, if you trim an image down to 2000 pixels by 3000 pixels to yield a 6 MP image, resizing it would be to change the number of pixels. . Resizing can either be uprezzing or downrezzing, by either increasing the total number of pixels or decreasing the total number of pixels, respectively.

One commonly used reason for resizing is that when people prepare photos for posting to the internet, such as posting to this forum, they will typically downsize the image, taking a photo and simply reducing the number of pixels. . So back to that theoretical 2000 by 3000 pixel image I discussed in the previous paragraph, if you wanted to post it here to this forum, and abide by the forum's posting size rules, then you would resize the image from 3000 pixels on the long side to 1600 pixels. . This would result in a file that is 1600 pixels by 1067 pixels, for a 1.7 MP image.

After resizing, the "look" of the photo stays the same, and the aspect ratio (proportions) of the image stays the same. . The only change is in the number of pixels, a.k.a. "resolution".

Typically, with any editing or post processing program, resizing is done when exporting or saving a photo. . There will typically be a box or a pop-up thingy that asks you what dimensions you would like to size the exported or saved image at. . This is how it looks in the program I use, Apple's program, "Photos" (formerly iPhoto):

Jeff USN Photog 72-76 wrote in post #19024747
I usually crop my images, sometimes 50% or more, and then I just save the cropped images. In reading some of the threads they were talking about resizing after cropping spirit to show my lack of experience in this what exactly are they saying and how do I do it I use Lightroom and Photoshop.

For LR I do it on the export page which also includes export sharpening for media type. Capture sharpening is done in the detail panel.

For PS I use one of the sharpening filters for export sharpening. Capture sharpening is done in ACR detail panel which is similar to LR.

I only use PS for web viewing exports which is pretty rare these days. Almost all web exports are done using LR. For print export I use LR only.

For PS export I use traditional web export tool. You can export to any size as many times as you like without messing up the original file. I can’t remember the exact name as I’m out right now. A soon as I get home I’ll post it. It is called web export but it is JPEG and can be used for anything.

Thank you Tom

I always shoot RAW + JPG, mainly because the 90D doesn't show raw thumbnails in my Win10 and I like it that way fast to tell which Raw images to delete when I have gone through the jpgs for focus etc. I only work the Raw images

I understand cropping, in raw and can do it over and over and over and often do as it is all there. My question was upsizing and I guess that would be a resize from say from 1600 on a side back to 3000 on a side. But is I am only cropping in the raw image which was 6960x4640 cropped to 4975x2073 at 240dpi would upsizing be making back up to 6960x4640 but only the cropped portion?

sorry for being slow

Jeff USN Photog 72-76 wrote in post #19024829
My question was upsizing and I guess that would be a resize from say from 1600 on a side back to 3000 on a side. But is I am only cropping in the raw image which was 6960x4640 cropped to 4975x2073 at 240dpi would upsizing be making back up to 6960x4640 but only the cropped portion?

.
First of all, dpi has nothing to do with anything. . Just forget all about dpi unless you are printing an image yourself.

As for the upsizing you ask about, the upsizing can be to any resolution, and doesn't really have anything to do with the native resolution that you originally shot the image at.

If you have an image that you cropped to 1600 pixels on the long side, you can upsize it to any resolution you like - 2000 pixels, 3000 pixels, 15,000 pixels, 4216 pixels, 8003 pixles ..... whatever you want. . I showed you a screenshot of how it works on my software - you just type in how many pixels you want it to be and it does it. . There are no limitations or parameters. . Photoshop should have a similar option that lets you do the same thing.

But upsizing doesn't really give you any more detail - it just divides the detail that is there up into smaller units. . It is not going to give you any better image quality, unless you do it in some specialized way or with specialized upsizing software. Upsizing is pretty much useless for any kind of regular usage. . I can't see how you could possibly benefit from it for what you are doing with your photos.


.

File - Export - Web Legacy (Legacy)

I video on upsizing if you are interested but I would not do that to upsize something that was downsized.

https://www.youtube.co​m …4mV3NsLmXw&feat​ure=relmfu

Jeff USN Photog 72-76 wrote in post #19024829
Thank you Tom

I always shoot RAW + JPG, mainly because the 90D doesn't show raw thumbnails in my Win10 and I like it that way fast to tell which Raw images to delete when I have gone through the jpgs for focus etc. I only work the Raw images

I understand cropping, in raw and can do it over and over and over and often do as it is all there. My question was upsizing and I guess that would be a resize from say from 1600 on a side back to 3000 on a side. But is I am only cropping in the raw image which was 6960x4640 cropped to 4975x2073 at 240dpi would upsizing be making back up to 6960x4640 but only the cropped portion?

sorry for being slow

Sorry, I originally misinterpreted your use of 'resize'...

Sizing of the output file is NOT necessarily related to the size of the original RAW!
If my starting RAW size is a standard 7DII file, I can tell LR to output a JPG with whatever dimensions I choose

• I might tell LR to output a 1500 x1000 JPG in order to post it on POTN (down sizing)
  
• I might tell LR to output the original pixel count, 5,472 x 3,648 JPG
  
• I might tell LR to output a 30 x 45" size print at 250 pixels per inch (up sizing) in the output JPG, and it therefore outputs a 7500 x 11250 pixel JPG that I can send to the lab to print for me.