Does PhotoPost Pro Gallery Strip MetaData?

420 · January 22nd, 2011, 09:39 PM

Got this question from a member today, can you answer it?

Quote:

Quick question, does your gallery automatically strip photos of metadata? Asking because I accidentally uploaded a few that had metadata (with my name in it among other things).

Thank you.

Chuck S · January 23rd, 2011, 08:46 AM

An image processor will strip data sure. jpegtran will also strip meta info from an image if you use that as well. Any image created using an image processor will destroy the info. jhead is used to extract exif data.

The only way an image will not be touched is if the full large image is under your max image height width thresholds.

420 · September 7th, 2012, 08:07 PM

Got this today from another member, is it true that your software does not strip this data after all?

Quote:

Meta data included in the header information on the picture file is stripped, that's a great start. unfortunately the US Government required manufacturers to include code in their software and the actual pixels of the camera store the make model and serial of the camera taking the picture. Further if your camera has date and time then it's included. It would be absolutely amazing to see this information stripped in pictures.

But even local law enforcement and state agencies are not even close to sophisticated enough to utilize... But if the FBI starts looking into you, they'll have the make and model of your phone or camera in the search warrant and then they will print out photos that were actually taken on your camera without the flash card... imagine that... get your pictures without having the memory stick...

Chuck S · September 7th, 2012, 08:11 PM

If a photo is resized sure this information is stripped as we posted when you last asked this question.

Camera's do include exif information on photos taken by them and you can extract exif information from a photo when it is uploaded that is a totally separate option you can setup.

But as previously posted any photo that is resized whether you use GD2 or Imagemagick when an image processor resized a photo down in size that info would not be retained.

420 · September 7th, 2012, 08:31 PM

Let me see if I understand you properly.

1. Are you saying there are two types of information gathered, meta and exif, is that correct?

2. Does PhotoPost Pro strip the meta AND exif data when uploaded to the gallery or only the meta data?

3. When you say, "you can extract exif information from a photo when it is uploaded that is a totally separate option you can setup", can you please be a little more specific? Are you saying there is a way to get rid of this exif data and if so, can you please explain how to do so?

4. When you say, "But as previously posted any photo that is resized whether you use GD2 or Imagemagick when an image processor resized a photo down in size that info would not be retained". Are you saying that as long as the photo is resized, both meta and exif data are stripped or only meta data?

Thank you.

Quote:

If a photo is resized sure this information is stripped as we posted when you last asked this question.

Camera's do include exif information on photos taken by them and you can extract exif information from a photo when it is uploaded that is a totally separate option you can setup.

But as previously posted any photo that is resized whether you use GD2 or Imagemagick when an image processor resized a photo down in size that info would not be retained.

Chuck S · September 7th, 2012, 08:40 PM

1. What you are referring to as meta data is exif information.

2. If an image is resized any exif data is stripped sure.

3. You can set the path to jhead on your server if you have that installed and then you can set the option to extract exif informtion to yes. then when you upload a photo the exif information will be extracted. You can see here as an example click the show exif information on this photo.

http://www.reeftalk.com/gallery/Memb...p1661-021.html

4. I mean just what I said that any header info on a photo no matter what name you give it that it is stripped. Usually when dealing with photos we call it EXIF and IPTC information. It is all the same stuff. What I have said is that resizing a photo will destroy photo headers.

420 · September 7th, 2012, 09:36 PM

What if the photo being uploaded is smaller than the re-size setting, allowing it to upload, however not re-size? Does the data remain in the photo?

Chuck S · September 7th, 2012, 10:10 PM

If a photo is smaller than your resize dimensions nothing happens to it it is uploaded as it is.

Now of course we also go back to what I have said before as well. If you have set the path to jpegtran in your global options which is used to clean the header info to any image then every image is stripped of this info. I covered this on my initial response as well.

420 · September 16th, 2012, 08:44 PM

Does this require your latest version or will it work with the previous version as well?

Quote:

If you have set the path to jpegtran in your global options which is used to clean the header info to any image then every image is stripped of this info.

420 · September 16th, 2012, 08:47 PM

Also, if we do this, will it strip all existing images of exif data?

If not, how can we achieve this?

Thank you.

Chuck S · September 16th, 2012, 09:02 PM

jpegtran is ran when you upload an image so you can not strip headers of existing images there is no such functionality for that in the program.

If you want to strip header info for new images you upload just set the proper path to jpegtran on your server.

420 · September 16th, 2012, 10:49 PM

Have you ever developed, or heard of a script, that converts/strips exif data from existing images?

Quote:

jpegtran is ran when you upload an image so you can not strip headers of existing images there is no such functionality for that in the program.

Chuck S · September 16th, 2012, 11:09 PM

I have never heard of such a hack or mod. You would have to develop such a thing as stated all the actions we do with files happen when they are uploaded. The only thing you can do once a file is uploaded is rebuild a medium or thumbnail or extract exif if it has not been extracted yet.

420 · November 8th, 2012, 09:16 PM

A member just posted this in the forums.

Quote:

hi im trying to upload a pic keeps comin up with error 2 problem with jpegtran

Any idea what it could be?

Chuck S · November 9th, 2012, 08:17 AM

Well to be honest in my 8 years here I have never heard of an error code 2 nor do I see anything on the net.

If he is only having an issue with a specific file then maybe try another file see what happens. If you and everyone else can upload then it is related specifically to him. That has to be a bad file or maybe his uploads directory has a bad file.

You can delete any numeric directory under the uploads folder or delete directly the uploads/ NUMERIC USERID folder of the specific user.