Compressed XMP in JPEG files?

Hi,
I'm trying to access XMP info in some images files. Some works, anothers doesn't. The images that a cannot access seems to have the XMP info compressed or in binary format.
Someone knows if I'm right or I'm wrong?
And if is compressed, how to access it?

Can you show us a simple of the dump of the binary data where the XMP block is located? Normally XMP cannot be compressed, nor can it be in binary.. - it would defeat the purpose - it might be in UCS-4 or UTF16 though....

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Writing XMP to multiple file formats (PDF, JPEG, TIFF, etc)

Hi,
I am developing a server-side component that embeds XMP data into a file (of various formats) and then provides these files for client download.
I have been using the XMP toolkit for generating the metadata, however i now have the problem of getting this metadata into the relevant file. I could always develop this myself but it seems like a huge amount of work. So to make my life easier, does anyone know of any toolkits (from adobe or otherwise) that support writing XMP data into different file formats (PDF, JPEG, TIFF, AIFF, MPEG etc) ??
I am developing in Java so I would prefer Java libraries, however I can always use JNI calls to C/C++ (as i have with the XMP toolkit).
Any help would be very appreciated.
Regards,
Jude

Greetings,
I think we should standardize some information, I know for a fack, that I will support adding XMP metadata in the HDF, RIFF, IFF and OLE file formats. If you have any specific suggestions on the chunk information or signature information that I should use, let me know?
For my part, I was thinking of adding RIFF,IFF chunks with the name \ xmp in those file formats. For OLE, maybe an added stream with the xmp name (in UTF-16).
Comments welcome everyone!

A way to force XMP sidecar file use with JPEG files?

I have a nice camera but it only saves in JPEG format. Once I rename the files and put my basic copyright info into the metadata, I like to mark them as read-only for safety. However, I want to be able to save the metadata that I enter in Lightroom 1.1 out to disk along with the files so that other programs can read it. I see that Lightroom will save in a separate XMP sidecar file if the photo is in one of those snobby RAW formats but not if it is in one of the low-life formats like JPEG. ;^)
Is there any way at all to get Lightroom to use a sidecar file with JPEGs or do I have to just risk it and let it edit my JPEG files every time I do anything? I'm sorry, but my lowly JPEG files are just as important to me as a RAW file is to someone else. They are my photographs and I want to protect them.

I'm not a pro so my backup routine is a little slip-shod. Sometimes I just grab a few files off the card, process them, and send the processed version out to whichever friend or relative is waiting impatiently for them.
I guess, I am most concerned about:
A) LR corrupting the working file and losing all the virtual edits. It is not easy for me to re-figure out what I did in the first place. Knowing about the safe-write technique helps.
B) Backing up just the edits. If the virtual/non-destructive edits were stored in separate .XMP files then I could back up those files to the same media as the original files and have them both together for future recovery operations. As it is, I now have to back up the entire working copy of the file in order to back up the edits. This creates two different versions of the file on my backup media, which will be harder to keep track of. Besides, .XMP files are small enough, and I would only be creating them for my better photos, so I could squeeze them onto the original backup media if I saved a bit of room. If I have to back up the entire modified file then it is less convenient.
C) When I write the metadata to the JPEG file, does it change the Windows modified date or creation date?

JPEG File Compression

I just found out that when raw files are converted (via the export function) to jpeg, the file compression is extremely low. MY posted online picture quality certainly reflects the low jpeg file size.
When I export pictures, I get several choices, but none of the choices allows me to set the jpeg compression to a "high" level.
Can someone help me maximize my converted jpeg file size. I shot with a 21 megapixel camera and end up with a 1mb file (not good)

Thank you Ian ... I appreciate your quick reply. It seems that after I upgraded my camera from a Canon xti to a Canon 5D Mark II and from a PC to an iMac, I find that I am very ignorant of photography and post processing.
The combination of equipment above with Aperture is causing me huge problems since I can not get the picture quality (on screen or prints) that I got from the xti and pc. My pictures were post card quality - the upgraded equipment combination is giving me poor quality photo's. Very frustrating. I wonder where I can go for help ?

Changing default jpeg compression for Web Gallery files

I have created several web galleries from both Raw and Jpeg files with Iphoto '08 that suffer from serious jpeg compression artifacts. I haven't found any way to change the compression amount to reduce the artifacts. Is there actually a way?

papasteveo:
Welcome to the Apple Discussions. There is no way in iPhoto for the user to manage the jpg compression of the web gallery photos. If the option for visitors to download the photos is selected the copy that's uploaded is compressed approximately equivalent to an Photoshop quality setting of 8 or 9 out of 12. The pixel dimensions are the same as the original unless the max dimension in the original exceeds 3054. The the file is resized to 3054 max dimension.
If the gallery is just for viewing the image is resized to 800 x 600 with additional compression.
You could manually replace the file with one that you've prepared but it would be very tedious as each file has it's own folder and the file name is changed to web.jpg (viewing only) or large.jpg (download). You would have to rename each file to be uploaded to the new name and make sure it's placed in the correct folder.
Do you Twango?
TIP: For insurance against the iPhoto database corruption that many users have experienced I recommend making a backup copy of the Library6.iPhoto database file and keep it current. If problems crop up where iPhoto suddenly can't see any photos or thinks there are no photos in the library, replacing the working Library6.iPhoto file with the backup will often get the library back. By keeping it current I mean backup after each import and/or any serious editing or work on books, slideshows, calendars, cards, etc. That insures that if a problem pops up and you do need to replace the database file, you'll retain all those efforts. It doesn't take long to make the backup and it's good insurance.
I've created an Automator workflow application (requires Tiger), iPhoto dB File Backup, that will copy the selected Library6.iPhoto file from your iPhoto Library folder to the Pictures folder, replacing any previous version of it. It's compatible with iPhoto 08 libraries. iPhoto does not have to be closed to run the application, just idle. You can download it at Toad's Cellar. Be sure to read the Read Me pdf file.

Is the JPEG compression option on TIF files lossy or lossless?

Is the JPEG compression option on TIF files lossy or lossless?

I accidentally used the JPEG compression on some important TIFF images. I usually use
no compression but didn't realise the option had been chosen. I can't easily re-scan. I have
read about lossless JPEG and with TIF considered a lossless format I had hoped this may
be the case.

Burning jpeg files without compression

I'm trying to burn a large number of jpeg files to a dvd. I have tried using the burn folder, but when I look at the file sizes in the burn folder they have been compressed some from 12 mg to 803 k. How can I retain the original file size. I also tried selecting all files and draging them into the remote disc window, then it said I needed autorization but I can't figure how to authorize. Lastly I tried to copy the complete folder, but it didn't seem to permit that either. I'm new to mac. Am and old windows user and it seems like it shouldn't be this difficult.Can anyone educate me?

Will have a host move your post over to the Maverick forum.
FYI: You have 90 days of free phone tech support from Apple under your warranty.

Adobe Camera Raw (ACR), Jpeg Files and Metadata

I have been using Adobe Camera Raw (ACR) with my Canon EOS 30D, an 8 MP camera, for a while now. I would make non-destructive changes to the raw file (.CR2) in ACR where the changes would be stored in an adjoining .xmp file. Jpegs of the unedited and edited camera raw files would be created so I have a before and after versions of the images that can be viewed anywhere.
Now I have a Canon EOS 5D Mark III, a 22 MP camera and the raw files are much larger. I’m looking at using camera raw on jpeg files for some for my more casual photo shoots in order to save disk space. From what I have read, I can use ACR on jpeg files and that the changes would be stored in the metadata in the jpeg file. Is there a way for the changes to be stored in an adjoining .xmp file so that the original jpeg file is not modified, much like it is done with the .CR2 files?
I am using Adobe Photoshop CS5 on a Windows 7 machine. All software is up-to-date.
Also, I have found that Adobe’s camera raw handing is different than the raw handling of the photos using Canon’s software (DPP). Is there a way to make ACR closer to what Canon’s software does?
Thanks,
Mike

Probably not going to happen.
I agree, Canon's color is better than Adobe's in general - I just didn't know how good the Camera Standard profile might be for your particular camera. I had hoped maybe they'd made it a very close match.
Some time ago I got a very nice genius-level Camera Raw forum member named Vit to make me a custom profile that exactly matches the Canon color for my 40D, even to the point of emulating the way Canon fits the entire gamut of the captured image into the sRGB color space, so I'm more than happy.
Others might tell you that you're silly for wanting the color to match, but I understand completely your position - if you do get that kind of feedback just ignore it and push on.
Once you've set up a default to use Camera Standard, you may well be able to tweak the dozens of color controls to bring the Adobe default into line with the Canon color. I did that once before getting my special 40D profile, comparing embedded raw file JPEGs with the Camera Raw preview display with a variety of images - it was tedious but effective.
Best of luck.
-Noel

After syncing a JPEG photo from ITUNES to IPAD, how large is the file on IPAD? does the answer depend on the size of the original JPEG file in ITUNES?

1) Does downsizing the original jpeg photos to be synced with IPAD help reduce the total storage required on IPAD for the photos? What is the relationship between original JPEG file size in ITUNES vs final synced photo file size on IPAD?

Thank you for your response.
The sync process compresses the JPEG files -- the question is how much, so that I can determine a) how many photos 32 gigs will store in sync, and b) can I reduce the memory required by taking smaller jpeg files with my camera

Import metadata to jpeg files

i want to import massively metadata to jpeg files.
Can you help me to import metadata such as keywords.
I have already tried with xmp toolkit of Adobe but the metadata
is not readable from file info in Adobe Photoshop CS2
What seems to be the problem ?
I 'm using windows xp

I can probably help with this.
I have a script called TagFromFilename that can apply fill in the details that can be extracted from the file path if the .wavs are stored in the layout <Album Artist>\<Album>\[D-]## <Name>[ - <Artist>].<Ext> where D is an optional leading disc number and <Artist> is an optional trailing artist (otherwise both artist and album artist are set to the grandparent folder). You just need to make sure that before you add the tracks to iTunes, that it won't rename the files. You can do this by turning off the Keep option if the files are inside the media folder, or the copy option if the tracks are located outside.
Alternatively I have another script called ExportImport which allows for almost any editable to be adjusted, as long as you can export the internal track IDs of each track and then marry them up with the data you want to import. See Batch Add Comments Tag Solution? for a previous example of how if might be done. I'll gladly go into more detail if you tell me what fields you already have and what identifying information is present.
tt2

Help, i am trying to print my JPEG file that i created in photoshop at a photo lab but it is coming out like an X-ray. I have printed these files before so i have no idea what i am doing wrong.

Help, i am trying to print my JPEG file that i created in photoshop at a photo lab but it is coming out like an X-ray. I have printed these files before so i have no idea what i am doing wrong.
Could it be something i have done in my settings?
or when i am saving the file to JPEG?

Basically you're approaching this the wrong way around. What you need is the extreme sections to be quieter, not louder. The problem with moving the lower end of the audio is that you'll move the noise floor too, and get what's generally referred to as a 'pumping' effect. So what you do is to use a compressor to tame the peaks, and leave the lower level sound alone. When you've done that, you amplify (or normalize to a level you can determine) the whole signal. So the noise floor will be higher, but constant and not pumping. 'Match Volume' is a completely different tool for setting the overall levels of different tracks so that they sound approximately the same - it doesn't even begin to do what you want.
If it's music you are treating, then I'd almost certainly use the multiband compressor, because you get less artefacts with this. You need to experiment with the threshold levels, and almost certainly not use a massive compression ratio - 3:1 or 4:1 should be sufficient (although it's hard to tell without actually hearing the audio). You can tell what it's doing at any given point because the downward meter indicates how hard it's working. In theory you can apply make-up gain with it as well, but personally I leave that until everything's treated and use the 'Normalize' tool to set an absolute max level.

Export xmp from jpeg

Hi,
Photographer I use Internet in lots of coutries.
I have to work in jpeg and i want to export XML to send by Internet.
So Can I export XML from JPEG ?
Can I see the modifications if I put the sidecars XML in the directory of jpeg without modifications ?
Thx for your help
BLL

With ExifTool you can export xmp from jpeg to xmp files and vica versa. Just make sure you have the last version that support all your tags. And of course save the metadata to the jpeg file before you start using the tool and read the metadata after you done.

Best practice to develop & keyword Jpeg files - Use of virtual copies

There is no sidecar file attached to Jpeg file and I understand all modification on the Jpeg slightly deterioriate the file quality.
Therefore, is it advisable to use vitual copies for all modifications?
Would use use them for trial and errors procedure, then apply whatever settings retained to the Jpeg file?
Or would it be better to leave the original Jpeg altogether untouched and stick to the virtual copy once modified?
What about keywords applied at several stages before and after usig the develop module.
Any advice would be much appreciated. Thanks in advance.

Would you advise to store the metadata in the file itself IN ADDITION to where they are located in the catalog?
How to proceed?
Would it make a difference in the export process?
Storing metadata in the file itself is a good idea if you ever think you might share the photo with others, or with another application (other than Lightroom). And I think almost everyone will be doing one of these things at some point.
You would want to turn on the option that automatically stores the metadata in xmp. Edit > Catalog Settings > Metadata, check the box that says Automatically Write Changes into XMP
Would it make a difference in the export process? Probably unnoticeable fractions of a second.

Why is jpeg file size different in CS 5 and Photoshop CC?

If I open a jpeg file in both CS5 and Photoshop CC, and then "save" the files, the file from CC is much smaller than the file from CS5.
The size and compression ratios are the same, but the file size is different. (It is about 1/2 the size).

Bridge does not compress any files whatsoever. Bridge is not an image editor, it's nothing but a browser that hands the files to their respective applications. Bridge does not "open" or "save" files, it can't compress them in any shape or form.
What you are seeing is the difference between the opened, uncompressed file in RAM and the space the file occupies on disk once
Photoshop has saved and compressed it.
The Bridge cache has nothing to do with any of this.

My jpeg file sizes are much larger than they used to be.

Just recently the file sizes on my .jpeg files have become excessively larger than they used to be just a week or so ago. Where I used to go almost a week to need to archive to DVD a bunch of saved images, I've now got to save to DVD almost daily.
For example, a 300x300 pixel image which shoud be about 32 Kb reads 383 Kb in the finder. I'm not doing anything to these images, just draging and droping.
Where I used to get 7 K files on a DVD, I'm now getting less than 2 K files to each disc.
Any thoughts on what's changed and how to fix it?

What App & JPEG compression rating are you using, some apps can reduce file size by dropping colors for instance...

Compressed XMP in JPEG files?

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