5 Replies Latest reply on Dec 13, 2015 7:43 PM by carlw30745729

    Import with develop presets vs Develop vs Export


      Setting: Scientific specimen imaging, using Lightroom to convert and standardize image types. All images are produced in a photobox, so are pretty much all the same other than the actual specimen.  The end products are jpeg and DNG images uploaded to a database.


      From the camera's raw image folders we “Import” images to Lightroom with “metadata” and “Develop” presets enabled, which yields DNG files for each image.  There are white balance, sharpness, and color hysteresis correction in the "develop preset" used for the import, we do no other manipulation of the image in LR.


      The Basic Question is:  Are the DNG files generated from the “import” final, usable, DNG images, or must these then be “developed” or “exported” to yield the final DNGs?  Experimentally we have tried doing the “export” and the exported DNG files are exactly (to the byte) the same size as the ones we generated when they were imported.


      The question is are we doing anything other than wasting time when we do the "export" to yield a second set of DNG files?


      Thanks,  Carl

        • 1. Re: Import with develop presets vs Develop vs Export
          sarsaxen Adobe Employee (Admin)

          Hi Carlw,


          Copy as DNG is an option to covert the file format to DNG .

          Its will only change the file format and will not edit the image.

          If you have not made any changes to the image after importing to Lightroom and have exported it from Lightroom then  it would be same as the one you have imported.

          May I know what do you mean by Final DNG here? If you are not making any changes to your image while its in Lightroom.




          • 2. Re: Import with develop presets vs Develop vs Export
            JimHess Adobe Community Professional & MVP

            When you make adjustments using Lightroom, those adjustments are not applied directly to the image file but rather are stored in the Lightroom catalog. So if you make adjustments to your DNG files and then simply try to use them outside of Lightroom the adjustments that you have made will not be seen. By exporting DNG copies, those copies will include all of the adjustments that were made to the original DNG file.


            There is one option that you can change that might have an impact. Some users choose the option in Lightroom Preferences to write changes to XMP files. Choosing this option should write the changes to the DNG file itself. I haven't done it. Some have reported that not all adjustments and metadata get written to the file. Others have reported that writing changes to XMP slows down the Lightroom operation. Although the option is to write changes to external XMP files, that is only true in the case of original raw files from the camera. DNG files and other file formats that Lightroom supports has the changes written to the file itself.


            This is an option that you can try to see if it works satisfactorily for you. If it doesn't, then exporting DNG copies is probably your best choice.

            • 3. Re: Import with develop presets vs Develop vs Export
              carlw30745729 Level 1

              By "Final DNG" I mean a DNG file that could be viewed elsewhere on another computer after uploading to the database and would have all of the "develop presets" applied. My understanding is that manupulations applied within LR yield "pointers" that LR uses to render the image and then Develop and Export must be done to generate usable images.  I am querying exactly how this works for the import functionality.


              We are using the "copy as DNG" functionality for the import (along with the develop presets as part of the import), so we are generating DNG files. The answer suggests that these develop presets are impacting the actual import process, which I am curious about.


              My real question is:  In the IMPORT functionality does LR actually create the DNG image using the "develop presets" during the import, or does it just set up a set of "pointers" that it uses each time the image is viewed in LR?  (And would be presumably applied to the image in an export)


              Thanks,  Carl

              • 4. Re: Import with develop presets vs Develop vs Export
                sarsaxen Adobe Employee (Admin)

                Yes, Carl in Lightroom you just see the  preview for the DNG files, which has a pointer to the original image. Lightroom do not work on the original files and at export as well it creates a copy of the image with the edits done within Lightroom.

                So you are required to export the image from Lightroom in order to see the changes outside.


                ~ Sarika

                • 5. Re: Import with develop presets vs Develop vs Export
                  carlw30745729 Level 1

                  Update:  We did some experimentation and what we found was that if you use "import with DNG copy with develop presets" function that the DNG file generated has all of the changes in the develop preset applied to image in the DNG file.


                  Our experiment:  Starting with the 2 identical copies of the same RAW image, we did the import with DNG copy twice - once with our develop presets applied and one without any develop presets.  We then exported the each of the images as a DNGs, yielding an "import only" and an "exported" version of each image.  We then compared the 4 images (on another computer without LR)  It is clear that there are no differences between the DNG generated via "Import with DNG copy with develop presets" and the images after export.


                  Thus, it is our conclusion that there is nothing to be gained from the export function for DNG images that were generated using the "import with DNG copy with develop presets" function.


                  Note:  We are using LightRoom CC 2015.3 Release, Camera Raw 9.3


                  We hope this is helpful to other users!