Shooting Raw + Jpeg

I frequently shoot raw + jpeg so have a lot of files with the same name but different extensions. When I try to import the raw files and jpegs both into Lightroom (I'm using version 1.0) I only get the raw files. If I try to import the jpegs separately it tells me that they are already in the library. Is there a way to import both?

Okay, that will work Sean. I have another question for you. My practise has been to keep my raw files and the final converted JPG. I use the JPG for most applications, and only go back to the raw file if I need to reconvert for some reason, perhaps to make a TIFF for a really big print.
So, I have about 45,000 photos that I have both NEF and JPG versions. I want to keep both in my LR library, plus any other "versions", such as a reduced JPG for the web, all in my LR library.
Also, as I go through the library and want to cull images, I want to delete all the "versions", the NEF, JPGS at once.
How would you suggest I go about this in LR?
Thanks in advance (and thanks for all your great work and nifty blog site :-)

Similar Messages

RAW files not showing when I shoot raw + Jpeg!!!

I have a strange issue that has only recently started happening. I have started shooting raw + jpeg to speed up post processing. However, after I import the files into Organizer the raw files will not show. At first I thought it was the camera. So I used a different brand DSLR. I had the same issues with my Sony and my Canon. I have shoot raw with the Sony for years and never had an issue. I have shot raw with the Canon and haven't had an issue. It is only when I shoot raw + jpeg. I formated both cards prior to using them.
The files are there and not damaged. I used the software from Sony and the software from Canon and was able to view the raw files. I wanted to make sure what I put was accurate so I tried viewing the files again. Even with the Canon software when I tried to view some of the raw files full screen it wouldn't let me.

I am using PhotoShop elements 10. My cameras are a Sony a230 and Canon 60d.

Aperture and shooting Raw+Jpeg

In camera Jpeg processing becomes better and better with each generation of cameras. One example is the dynamic range optimizer in my Sony A700. You often have a hard time to get similar results from the Raw. So for quite a lot of shots - especially the not so important ones - using just the Jpegs is a real time saver. Still it is good to have the Raw handy in case the camera processing went in the wrong direction, which still happens occasionally. With 8 or 16 GB cards it is not an issue meanwhile to shoot Raw+Jpeg. Unfortunately IMO there is no smooth Raw+Jpeg workflow within Aperture. Especially it is almost impossible to delete the Raw without loosing the Jpeg and vice versa in a managed library (see thread mentioned below).
Thus I just posted this to www.apple.com/feedback. If you think this is an important issue, that should be added in a future version of Aperture, you might sent your feedback as well:
It is nice, that Aperture already imports both pictures, if you shoot in Raw+Jpeg mode. But the further workflow of dealing with the Raw+Jpeg combo is not optimal:
The main reason to shoot Raw + Jpeg is, to save time in using the ready processed Jpegs for the less important shots or the ones, where the in-camera processing left not much to improve, but still having the safety-net of the Raw for a more advanced development, in case the picture asks for it.
So instead of showing the Raws and hiding the Jpegs by default it should be vice versa. If there is a Jpeg accompanying the Raw, the Jpeg should be displayed and the Raw should be hidden. At least you should be able to set in the preferences, whether you prefer to see the Raw or the Jpeg. If you realize while rating the picture or doing adjustments, that the Jpeg doesn't fit the bill, you should be able to give precedence to the Raw, aka showing the Raw and hiding the Jpeg.
After having finished the work, you should be able to either delete or archive the not used version (either Raw or Jpeg), without loosing any metadata or adjustments already applied to the other version.
Currently it is an extremely complex task, to get rid of the unused version. Workarounds are suggested in this thread: http://www.oreillynet.com/digitalmedia/blog/2007/09/gettingrid_of_unwanted_manage1.html
Peter

SierraDragon wrote:
I am unfamiliar with Sony DSLRs and do not know what might make a Sony JPEG visually equal to a Sony RAW image file.
What I refer to is the dynamic range optimizer, which is based on Apical’s IRIDIX image processing engine. I think it is used in recent Nikons as well, but as I have only a Sony DSLR I mentioned this.
Basically it is a kind of highlights and shadows adjustment, but it works very well and in many cases you have a hard time to generate similar good results with your RAW processor (aka. Aperture).
However, JPEG is still a lossy image format that IMO should only be used for low end usages. RAW converted by the camera vendor's software to non-lossy formats like TIFF should generally be quite superior to JPEG.
Of cause the RAW holds more information and carefully processed often leads to better results than the in-camera JPEGs. But not every picture will be printed in poster size. And although JPEG is a lossy format, with a low compression setting the artifacts are almost undetectable at least with my DSLR.
Shooting in RAW+Jpeg mode can be a real timesaver. You look at the Jpegs firsthand, rate them, make small adjustments, if neccessary. For the majority of the pictures you can use these Jpegs even for slideshows and prints. If you step over a picture, where the in-camera processing went wrong, like oversharpened, oversaturated picture with wrong WB etc., you can easily resort to the accompanying RAW and process it to your heart's content. The only drawback with this workflow is the increased temporary storage capacitiy you need. But with today's low memory card prices, the benefits outweigh the cost by far IMHO.
That said, the reason for my post was not to discuss the benefits of a RAW+Jpeg workflow, but Aperture's issues in dealing with it.
Peter

I am having issues when I shoot raw + jpeg. Raw files seem corrupt!!

I am having issues when I shoot raw + jpeg. It seems the raw files get corrupted. I have shot raw without an issue. It is only when I shoot raw + jpeg. The raw files will not show in Photoshop elements. I installed the Canon software and was able to see all the raw files; however, I noticed that when I tried to view some full screen they would not show. I also noticed that these raw files look block-ish. They appear more digital looking. Is there a specail card needed to shoot raw + jpeg? I formatted the ones that I have prior to using them.
Solved!
Go to Solution.

While it could certainly be a card-reader problem, data corruption of any kind can be any of the following:
1) the card
2) the cable (if used)
3) the card reader (if used)
4) the computer RAM,
5) thecomputer hard drive (or SSD)
A failure of any one of the above will result in corrupted images when viewed. Since it seems to be RAW file related, as they are signifantly larger than JPGs, it's likely anything but the card reader or cable.
The only way to 'beat it' is eliminate each of the possibilities, starting with the easiest/cheapest fix.
1) Use the cable. If that solves the problem, replace the card reader.
2) Use a different card. If that solves it, toss the old card.
3) If multiple sticks of internal computer RAM, swap them. If that fixes it, or, the problem 'moves' to other images, replace the RAM. It could be only 1 of 2 sticks bad, though, so use only 1 of the old sticks for a while to see if the problem recurs.
4) If you have multiple hard drives in your computer, or an external one, use that to store the photos for a while. If the problems go away, it's the drive. Note that hard drive failures typically start slowly and increase gradually. On occassion, though, your computer won't boot and it's all over. If you are down to thinking it's the hard drive, it's time to get a good backup...NOW!
For what it's worth, I had a similar problem with corrupted photos. Both RAW and JPGs were affected. But as the problems were after having loaded and initially viewed them on my HD, I knew it was a computer problem. It dogged me for a couple of weeks. I even played swap the memory sticks, pull one out and run on one only, swap the one for the other (running on one), and it STILL kept happening. I finally gave up and replaced both sticks of RAM. That solved the problem. So much for lifetime warranty from Hong Kong. A very well regarded brand of RAM, no less. My SSD drive was the next one on the list, it the new RAM didn't solve it.

In L/R 3, is there a way to import JPEG's only when you are shooting RAW + JPEG?

In LR3 is there a way to import JPEG's only when I am shooting RAW + JPEG -- say in the case of being on-location and I want to create a quick slideshow without importing the large, slow RAW images? (Shooting only in JPEG is not an option -- wedding photography.)

The answer in short is no....but...if you separate your images before import then they will be imported as desired. You could import to LR and rename or resort or put in quick collection and separate jpeg from RAW and then put them into a separate folder. As an aside, shooting jpeg +RAW seems duplicitous since LR "sees" both formats. To my mind...I work as a professional retoucher...just shoot RAW since it is just as fast as jpeg in capturing images, and you have the freedom to adjust the images uncompressed. Then import the images as RAW into LR...if you truly need jpeg for something like sending to a client, simplt export them as jpegs via the Export dialog. Your original RAW images are unaffected!

Shooting raw+jpeg and replicating treatment

If you shoot raw+jpeg and happen to like the jpeg treatment of a given shot, is there a way to precisely replicate or transfer the jpeg pp parameters to the raw? Not by eye, but precisely.

Jao vdL wrote:
The only way to get perfectly the same rendering is to use Canon's software.
While technically true, in practice, not so much...
The first and most important thing one must grasp (and accept) is there is no such thing as "correct" when it comes to rendering raw files...the raw sensor data is something that is subject to interpretation...it;s like shooting a color neg–the best interpretation may not be the most "accurate" nor "technically correct".
If you fall in love with the JPEG rendering, you will find life somewhat frustrating if you use Camera Raw or Lightroom because as pointed out above, if you are trying to "match"" (as in accurately replicating the exact tone and color) the rendering produced by Canon or Nikon, you're life will, essentially suck...because matching the EXACT rendering in ACR/LR is not going to be a pleasurable experience–it's doable but the question you gotta ask, is it worth it?
Shooting Raw & JPEG is an exercise in futility...you either get quick and easy JPEGs you can use (with zero chance matching them in ACR) or raw fles that you can control the rendering on (but pretty much forget matching the JPEG exactly)...
You would be better off shooting raw and learning how to render out JPEGs quickly that WILL match the raw files (cause they are based from the raw files).

How is the Raw data used in iPhoto. I currently shoot both jpeg and raw and import them both into iPhoto.

How is the Raw data used in iPhoto? I currently shoot both jpeg and raw and import them both into iPhoto. What do I gain by collecting Raw data?
Thanks

You get more parameters for making adjustments to the image. This is not really an iPhoto question but more a general photography one. In rather simple terms here's how a digital camera works:
You expose an image. A lot of data is gathered in by the sensor. But it's just a bug lump of data and not very useful in that form.
In cameras that shoot jpeg that mass of data is interpreted/processed into an actual image, and the image is stored in a jpeg file. (that's a process broadly analogous to developing a film). The decisions that go into making that interpretation are all made by an engineer somewhere, back when the camera was developed.
If you shoot Raw, then what you do is take that mass of data, and rather than working to the decisions made by that engineer, you develop the shot - you run the digital darkroom.
Why would you do this? Take on all this extra work? Well one of three reasons: a: you think you can do a better job than that engineer. b: you just prefer the result you get when you develop yourself or c: you're a hopeless shooter and raw means you have more options to fix the mistakes you made in the camera. (That's why I do it.)
Here endeth the two dollar tour. So, basically, if you're happy with what your camera produces in Jpeg then there's really no need to shoot Raw.
There's no need at all to shoot Raw+Jpeg as iPhoto creates a jpeg preview when you import, so you're just wasting space.

I wonder how pro photographers use aperture?I shoot raw and my harddrive is alreay full.I'm not able to import new pictures.Is it ok if i create a vault and delete all my projects in the HD.Can I use an external HD use aperture through the vault??

I wonder how pro photographers use aperture?I shoot raw and my harddrive is alreay full.I'm not able to import new pictures. I don't know what to do. I created a vault. My plan was to create a vault(put all my master files into an external harddrive) and then delete all my projects in my mac pro's harddrive. Is it the correct way to do it ? What should I do if I have thousands of raw files ? How should my workflow be? Can I use an external HD and use aperture through the vault,without keeping the master files on my computer's hard drive?? Or should I shoot raw+jpeg and store raw files in an external backup harddrive and import only jpegs into my aperture library?

There's a bit to learn. It will slowly make sense.
Aperture is an empty field. You're given a tractor and a whole bunch of attachments. What you grow, how, and where, is entirely up to you.
Vaults are for back-up and only for back-up. They have nothing to do with storing your working files.
When your Library outgrows your system drive (and for good performance, you should leave c. 20% of every drive empty), it's time to convert some of your image's Masters from Managed to Referenced. ("Managed" and "Referenced" refer to Masters, not to Libraries.)
There are hundreds of posts in the forum, and several pages in the User Manual on using Masters.
Many people run Aperture with the Library on their system disk, and most (or all) of their images' Masters on external FW drives. This is a good set-up. Note that you will likely have to take steps to back-up the data on your external drives.
If you do the above, there should be no reason to delete any Projects.
The choice of RAW or RAW+JPEG or JPEG depends on the kind of work you are doing. I capture RAW only -- but I don't do any commercial shoots. Pros on deadlines report that the RAW+JPEG works well for them. Capture JPEG if it saves you time. IMHO, there is not a good reason to shoot JPEG to save space (space is cheap; time expensive).
Short-term solution: buy and use a FW800 external 1 TB drive, formatted "Mac OS Extended (Journaled)", and using Aperture relocate the Masters of all images older than 30 days to that drive. (Be sure to change your back-up strategy to include this new drive; you may need a second new drive.)
This general post of mine might help you understand more about Aperture.

Import of RAW+JPEG pairs?

Just when I thought I had it all together...I seem to have forgotten where I put it. I need some expert assistance.
Aperture manages my Library which is kept on an external HD.
I shoot RAW+JPEG on my D200--two image files for every shot. To anticipate the question--I'm learning about the D200, and I want to be able to see the IQ differences between an Aperture-adjusted RAW image and a D200-adjusted jpeg.
I understood that when I imported my image files into Aperture, both files of the pair were imported and saved in my Library. I know I was working with the RAW file for all my adjustments and exports, but I believed that if I wanted that camera-adjusted jpeg, it was available from my Library. I'd also understood that I could call up that camera-adjusted jpeg using Option+J while selecting the paired RAW image in the Viewer. I know I can get a jpeg counterpart to the highlighted RAW image using Option+J--but whether it is generated by Aperture or camera is now uncertain.
Can someone who knows answer the following:
(1) Are both images in the shot pair (.nef and .jpg) imported into Aperture?
(2) If the Option+J image is not the downloaded, camera-produced image--then where does the resulting jpeg file which appears come from, and where are the adjustments for it set?
(3) If my original understanding is correct and both images in the pair were loaded into my Library--why can't I find the paired jpeg? It's not listed with the RAW files in my Finder, and my Spotlight doesn't find it either.
(4) Is there a way to get that paired jpeg into my Library along with its RAW counterpart.
One note on backup workflow: If those paired jpegs aren't imported into the Library, I'm fortunate to have followed advice from some of you here in the forum. Thanks to you, I always download my files using a reader and save them to a folder on my desktop. After importing them into Aperture from that folder, I move them to a folder I use to accumulate a batch for burning to a DVD for archiving. Only when burnt, do I erase them from the desktop and reformat my card. If, in fact, I've been wrong about those paired jpegs being in my Library, then I've still got them on my DVDs. Instead of being redundant with my Vaults, the DVDs will be my only source for them. Thanks to those of you who got me to buy into that workflow.
Terry

Thanks. A little Tough Love from the experts sent me back to try one more time to puzzle through the pages of posts on this subject. Sorry, but there's too much noise and contradiction in those pages of posts for me to buy in.
I did what each of us probably should do--an experiment. I noted the "New Version from Master JPEG" aka Option+J was grayed out if only one of the pair (either .nef or .jpg) was imported. Only having the pair imported activated thet Option+J pick. Excellent, and just what I hoped to see.
I also drilled down to the lowest level of the imported image folders in the Library. I'd previously stopped when I saw the image name but for some reason neglected to open the lowest folder to check for file extensions. Careless on my part. I confirmed what everyone here is regularly assured--that all the imported image files are available in the Library (and Vaults) should Aperture fail, or someone decide to leave Aperture for the dark side. Again, just what I hoped to see.

How to have iPad (iOS 5) import only the JPEG from a RAW JPEG pair?

I have an iPad 2 16 GB, running iOS 5. I also have a Canon EOS 7D. I purchased a CF Card Reader for the iPad (see http://store.micgadget.com/card-readers/280-ipad-2-cf-card-camera-connection-kit .html) so that I can view and edit photos quickly in the field, without having to lug my laptop around. To make this easier, I set my camera to shoot RAW+JPEG. I shoot with the smallest JPEG files possible, still a relatively large for the iPad 2,592x1,728, with the idea that I'd only import the JPEG files to the iPad, but still have the RAW files to work with when I get back to my computer. This works great with one exception: the iPad doesn't allow me to import only the JPEG files, but grabs the RAW files along with them. As you can imagine, this fills up my iPad rather quickly, and takes quite a bit longer to import than if it only grabbed the JPEGs.
So here is my question: How do I have my iPad import only the JPEGs from the RAW+JPEG pairs on the memory card?
One workaround that helps slightly. If I connect my iPad to my computer after the import, I can go in via Image Capture, select all the RAW images and delete them, leaving the JPEGs behind. This is an underwhelming solution, but does save space after the fact.

What you are seeing is how Safari works now in iOS 5. There is no way to get that icon in Safari now. There other much better browsers available in the App Store. Look at iCab Mobile, Mercury, Atomic, ....
I have been running iOS 5x for so long now, that I don't even remember if that icon did appear in earlier iOS versions

Panasonic Lumix LX3, shooting RAW with Film Modes

I've been shooting RAW+JPEG and testing Film Modes (for example B&W) and noticed that RAW images will import "tabula rasa" without any of the Film Mode settings applied. JPEGs are naturally as supposed.
I'm wondering if this is how it's supposed to work, as the RAW's first show a thumbail with Film Mode's settings, for example b&w first shows as b&w, but eventually Aperture processes a new thumbnail with standard raw settings. (I don't have previews on).
I know raw is raw and you can't shoot it b&w, but I can't help thinking if there are some in-camera RAW settings that Aperture just doesn't know how to read and pre-apply when it's imported.
The in-camera b&w settings would be nice starting point for further raw-editing in Aperture, but now one has to start from scratch.
Anyone know if this is how it works, maybe with other cameras too?

That's propably it. Only, I've read some reviews of LX3 that claim you can also shoot Film Modes in RAW. For example Mark Goldstein at photographyblog.com says:
"This [=film mode] applies to both JPEG and RAW files, so you can effectively shoot a black and white RAW file, for example, out of the camera if you wish (although I'm not sure why you'd want to...). "
This makes no sense to me as I believe you can only get one kind of RAW from a sensor, but it makes me wonder if there still should be a way to have some kind of B&W RAW straight from the camera and Aperture just doesn't know how to interpret it.
I also agree with Goldstein that I wouldn't want it to shoot b&w destructively, but rather as a non-destructive "layer".
Also the LX3 manual doesn't say a word that you couldn't use Film Modes when shooting RAW, and it's quite good at telling what is not applicable for certain modes.

Cant open raw+jpeg

Hi- have a Canon 50D and went to download to Macbook and now the files show .igy in front of image numbers- get message saying cant open them- this is all the info I have as a friend was using the camera and there not sure what they did to it- any help would be appreciated
-Tommy

Are you sure images are showing "igy" in front of the file number?
They should show IMGxxxx.JPG or IMGxxxx.CR2 (if the camera is set to use sRGB color space)
or
_MGxxxx.JPG and _IMGxxxx.CR2 (if the camera is set to use Adobe RGB color space).
When shooting RAW + JPEG, you should see one of each for every file number.
In all cases the "xxxx" would be the sequential file number between 0001 and 9999.
50D cannot shoot video, so there are no types of video files possible.
There is no way to prevent 50D from using these file number conventions. In other words, nothing can be changed in the camera by the user... except the choice of sRGB or Adobe RGB color space, which determine whether an "I" or an underscore are used at the beginning of the file name.
If the file name is showing something different, that change must be happening when you are importing the images from the memory card to your computer. What method do you use? Is it set to rename the files during import? (I just use a drag and drop to copy or move the files from the folder on the memory card to a folder on the computer that I've prepared in advance... In other words, I don't use any software-based import.)
If the file extension has been changed accidentally, you should be able to edit it and change it back. Don't mix up the .CR2 and .JPG though. The CR2 files will always be the much larger of the two.
Alan Myers
San Jose, Calif., USA
"Walk softly and carry a big lens."
GEAR: 5DII, 7D(x2), 50D(x3), some other cameras, various lenses & accessories
FLICKR & PRINTROOM

RAW+JPEG over just RAW

hi guys. im an amateur photographer and have been shooting in JPEG, but the more i get into the hobby, the more i think i should start shooting in NEF RAW. i have a D80 and was looking for some clarification on the advantages of shooting RAW+JPEG over just RAW. the books all say its an option, but never really go into why you need the JPEG on top of the RAW image. any feedback would be great.
j

Everyone can have their own reasons for RAW+JPEG.
Here's one:
Your in camera settings can have sharpening, contrast and small/medium JPEG set. After a shoot, you can quickly send off your jpegs to friends, clients, web page, etc., without having to do any photo editing. Afterward, you can take your time with adjustments (levels, color, sharpening, etc.), with your RAW picks.
Others may chime in with their reasons.
Narvon

RAW+Jpeg Thumbnail Viewing Problems

A bit confusing...
I shoot RAW+Jpeg. My Jpeg's are B&W by in-camera choice, I have a Canon 5D w/ Picture Styles.
I import into Aperture from the CF card. It shows only the RAW pix, as it should.
When I browse the Project folder for these new pictures, select them, and choose New Version From Master JPEG, the Jpeg's come in stacked with their RAW counterparts, and they appear in thumbnail not as B&W but same as RAW color converted. If I unstack, there is no change of the Jpeg to B&W. If I view the Jpeg in the Viewer, finally I see it as B&W. This doesn't work for me. I want the B&W thumbnail.
On the other hand. If I have set these pix in an album, and then select New Version From Master JPEG while in that album, the Jpegs come in individually, showing as B&W....BUT.... since they are in the Album and not the Project, they are not represented in the Project folder, and any Keywording that I may have done in the Album is unsearchable. So I essentially get the view that I want of the thumbnail but Aperture doesn't really know it's there.
To make matters worse, an earlier Project that I drew the Jpegs into does seem to show the Jpeg thumbnail stacked with the RAW, and in B&W as desired. I can't remember if the B&W thumbnails came in that way at first of Aperture finally got around to properly representing them as such at a later launching.
I have been encountering some frustrating inconsistency with this application, and am getting very very tired of not just being able to use it without having to track down why it's not operating properly every time I import.
I still don't know why the Library 5-star smart folder only shows the same small portion of select pics, when I have continued to add many more 5 star ratings in subsequent Project folders.
My Referenced image folders, and my vaults, have been very secure.
.......todd

Hey Karen,
Thanks for coming in on this, you were very helpful w/ directing me to bringing up the Jpegs from behind the RAWs with New Version from Master JPEG in one of my other queries.
I want to reference your comments as paragraphs 1), 2), 3), 4), if I might, so as to shorten the text here:
1) My images are in a Project folder, from there I created an Album.
While in the Album I selected all the images, and clicked on New Version from Master JPEG. The JPEGs came in seperately, i.e. not stacked with the RAWs, and the thumbnail appearance was B&W, which is what I was hoping for.
I Keyworded all the images in the Album, and then for kicks and confirmation, I tested the keywords in a search, my search was totally baffling.
When I searched for my "B&W" keyword, only the color Raws came forward, why? I don't know, there was no such keyword used on these images.
Also, I discovered that none of the JPEG's were showing up in the Project folder.
Next, I decided to select the RAW pictures in the Project folder. I then applied New Version from Master JPEG, and the Jpegs came up stacked with the RAWs.These JPEGs showed now in both the Project folder and the Album. But the problem for me was that both the RAW and JPEG were in color, identical to each other.
When I unstacked these stacks and Keyworded either in the Project or Album folders, indeed, they were searchable. But mind you, no thumbnail was to be seen that was B&W in appearance, and this was unacceptable, I count on being able to see the B&W thumbnail.
And, more confusingly, other earlier Albums have not all had the same problems with bringing in B&W thumbnails.
2) The smart album that I'm refering to here is the Library root select folder that has the 5 stars. It should have no problem collecting my 5 star images, wherever they are. Or so I thought. But quite a few 5 star images were not making it into this smart folder.
But now, since your writing, I went into a couple of Projects and had to manipulate the images to appear, which they finally did in both the smart folder in a Project, as well as the root "Select" folder in the Library. So now they show up in both places as they should. The solution was to make sure that the 5-star image was the Pick of a stack for it to show up in a "select" smart folder. I'm a little disappointed that stack internals seem to escape the search. I think this problem needs to be remedied. Until then, I guess I have to just be more diligent.
3) Thank you, I'll hit this link a little later, I have paid some attention to this site, it's been really helpful.
4) I did go to this site, unfortunately nothing here has helped my problem with the Jpegs.
.......todd

Merge existing RAW/JPEG photos?

I shoot RAW + JPEG. Under iPhoto, they imported as separate files. I have moved them over to Aperture 3 and would like to "merge" them the same way new photos are merged on import (RAW+JPEG pairs). Is there a way to do that?

At least my camera creates the same name for the JPEG and the RAW images, so programmatically recognizing the potential pairs would be a piece of cake. Then just run the same operations on the images as in import. This should be easy for an Apple SW engineer to create. Leaving this iPhoto -> Aperture migration half way was silly.
Anyways, there are workarounds.
1) Export all masters of a project to a HD folder, and then import them again to a new project with the setting "JPEG as master". Delete the old project all the way when you are done. This works if you have not done any adjustments to any images. The Aperture library size also shrinks since there are no previews generated for the "hidden" RAW images.
2) Export the RAW masters of a project to a HD folder, and then import them back to the same project with the "Matching RAW files" setting. Delete all RAW files that have a matching JPEG when you are done (how to locate those is a bit tricky, you can use file size as a sorting help, but probably you will want to do this manually).
You may also want to do any of this destructive work by first exporting the project as a library and then operating in the exported library only. Just to avoid touching the masters.
Fixing the preview size to be smaller may be a good idea, too.

Shooting Raw + Jpeg

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