gmane.comp.web.pel.devel

New to PEL, need simple help

Alex Adams — 2012-04-16T21:39:03

I'm new to PEL and this mailing list.  I hope this is the right place to ask my questions.

I have basic usage questions.  I am making jpeg thumbnails from pages of PDFs.  Each PDF will have one thumbnail.  The thumbnail might be from any page.  I want to store the page number in the user comments of the image's Exif data.  When the thumbnail is created it has no Exif data.

How do I create an Exif data branch containing a user comment entry with my page number in it, save it to file and later retrieve it?

I'm able to access the image file, but of course the Exif is null and I don't know where to go from there.

Can anyone help?

Thanks,

------
Alex Adams
hawkVision - building highly agile worlds of knowledge
alex< at >a2technology.com
haadams< at >nps.edu
www.hawkvision.info

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[ pel-Patches-1911643 ] Sanyo and Pentax test images

SourceForge.net — 2010-12-06T13:43:25

Patches item #1911643, was opened at 2008-03-11 06:24
Message generated for change (Settings changed) made by lsolesen
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https://sourceforge.net/tracker/?func=detail&atid=650324&aid=1911643&group_id=108380

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Category: Test image
Group: None
Resolution: None
Priority: 5
Private: No
Submitted By: Dan Fandrich (dfandrich)
Assigned to: Martin Geisler (gimpster)
Summary: Sanyo and Pentax test images

Initial Comment:
The attached test images may be added to the PEL test images archive under the GPL. The first was taken by a Sanyo VPC-C5. The second by a Pentax Optio 430RS.


----------------------------------------------------------------------

Date: 2010-12-06 13:43

Message:
This will be implemented as soon as I figure out the following.
https://github.com/lsolesen/pel/issues/issue/12

Follow up on https://github.com/lsole

[ pel-Support Requests-1765895 ] New documentation for download

SourceForge.net — 2010-12-06T12:38:39

Support Requests item #1765895, was opened at 2007-08-02 07:17
Message generated for change (Settings changed) made by lsolesen
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Category: None
Group: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: New documentation for download

Initial Comment:
It would be nice to have a place to get the new documentation in a tar-ball or from FTP.  I was downloading it page-by-page from pel.sourceforge.net/doc and apparently the documentation is not complete there either.  This is nice code and I hope to use it to create a batch description GUI for thw web.


1. Server: pel.sourceforge.net
2. URL path: /doc/PEL/Exception/_PelDataWindow.php.html
3. Error notes: File does not exist

[ pel-Support Requests-2993747 ] add/edit orientation tag on jpg?

SourceForge.net — 2010-12-06T12:37:57

Support Requests item #2993747, was opened at 2010-04-28 18:30
Message generated for change (Settings changed) made by lsolesen
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Category: None
Group: None
Priority: 5
Private: No
Submitted By: Matt Gilbert (mattgilbertnet)
Assigned to: Nobody/Anonymous (nobody)
Summary: add/edit orientation tag on jpg?

Initial Comment:
How do I add/edit an orientation tag to a jpg? I've tried editting the edit-description.php example to do this, but no luck so far. Here is my code:

$exif_orientation = 6; // 90CW, tested with in exiftool

drupal_set_message('Reading file "'.$input.'".');
$data = new PelDataWindow(file_get_contents($input));

/* The static isValid methods in PelJpeg and PelTiff will tell us in
 * an efficient maner which kind of data

[ pel-Feature Requests-1210126 ] parsing method

SourceForge.net — 2010-12-06T12:36:29

Feature Requests item #1210126, was opened at 2005-05-27 19:45
Message generated for change (Comment added) made by lsolesen
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https://sourceforge.net/tracker/?func=detail&atid=650325&aid=1210126&group_id=108380

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Category: None
Group: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Martin Geisler (mgeisler)
Summary: parsing method

Initial Comment:
Why does the current implementation require reading the
entire image file into memory? Surely it'd be a lot
less memory intensive if it could read and parse the
tag bit by bit.

----------------------------------------------------------------------

Date: 2010-12-06 12:36

Message:
Reopen at https://github.com/lsolesen/pel/issues if it is still an issue?

----------------------------------------------------------------------

Comment By: Mart

[ pel-Bugs-3017880 ] getEntry(PelTag::IMAGE_UNIQUE_ID) always returnsnull

SourceForge.net — 2010-12-06T12:34:48

Bugs item #3017880, was opened at 2010-06-18 04:28
Message generated for change (Comment added) made by lsolesen
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including the initial issue submission, for this request,
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Category: Parsing
Group: PEL Version 0.9.x
Priority: 5
Private: No
Submitted By: Fred N (fnplus)
Assigned to: Nobody/Anonymous (nobody)
Summary: getEntry(PelTag::IMAGE_UNIQUE_ID) always returns null

Initial Comment:
I clear the Exif data of a jpeg and then add a new entry and this process works properly, except with the PelTag of IMAGE_UNIQUE_ID. Once an image has been processed with it, it should now have a new entry for SOFTWARE, for example, so if I run the script again on the image that was just processed, instead of $software returning null, it will return a value, which means it only needs to be updated using $softw

[ pel-Bugs-2979466 ] endless loop in PelIfd->load

SourceForge.net — 2010-12-06T12:31:54

Bugs item #2979466, was opened at 2010-03-30 15:44
Message generated for change (Comment added) made by lsolesen
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Category: Parsing
Group: PEL Version 0.9.x
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: endless loop in PelIfd->load

Initial Comment:
I get "Fatal error: Allowed memory size of xxx bytes exhausted" while trying to read some images (see attached file) due to an endless loop in PelIfd which repeatedly loads itself (line: 240)

----------------------------------------------------------------------

Date: 2010-12-06 12:31

Message:
https://github.com/lsolesen/pel/issues#issue/11

----------------------------------------------------------------------

Comment B

PEL moved to github

Lars Olesen — 2010-12-01T22:15:40

PEL has now moved entirely to http://github.com/lsolesen/pel. Please
go there to see the new README. If you have outstanding bug reports
please file them there. PEL will not be updated at sourceforge
anymore.

[ pel-Bugs-2979466 ] endless loop in PelIfd->load

SourceForge.net — 2010-12-01T22:03:10

Bugs item #2979466, was opened at 2010-03-30 15:44
Message generated for change (Comment added) made by lsolesen
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=650322&aid=2979466&group_id=108380

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
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Category: Parsing
Group: PEL Version 0.9.x
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: endless loop in PelIfd->load

Initial Comment:
I get "Fatal error: Allowed memory size of xxx bytes exhausted" while trying to read some images (see attached file) due to an endless loop in PelIfd which repeatedly loads itself (line: 240)

----------------------------------------------------------------------

Date: 2010-12-01 22:03

Message:
A test has been added at:
https://github.com/lsolesen/pel/commit/42fff79104fa5f043207b132164b444d150

[ pel-Bugs-3017880 ] getEntry(PelTag::IMAGE_UNIQUE_ID) always returnsnull

SourceForge.net — 2010-12-01T22:01:04

Bugs item #3017880, was opened at 2010-06-18 04:28
Message generated for change (Comment added) made by lsolesen
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=650322&aid=3017880&group_id=108380

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: Parsing
Group: PEL Version 0.9.x
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Fred N (fnplus)
Assigned to: Nobody/Anonymous (nobody)
Summary: getEntry(PelTag::IMAGE_UNIQUE_ID) always returns null

Initial Comment:
I clear the Exif data of a jpeg and then add a new entry and this process works properly, except with the PelTag of IMAGE_UNIQUE_ID. Once an image has been processed with it, it should now have a new entry for SOFTWARE, for example, so if I run the script again on the image that was just processed, instead of $software returning null, it will return a value, which means it only ne

Re: get pel format from pel tag

Martin Geisler — 2010-09-22T08:04:22


It looks nice.


I am actually no longer maintaining PEL. I have stopped using PHP some
years ago, and I have moved on to other projects.

I'm CCing this mail to the PEL devel mailinglist and to the new
maintainer. Hopefully you can get in touch and work on updating the
code.

Re: problem writing UserComment

Pippo Fresta — 2010-09-06T16:20:27

ok, my question has partially resolved becouse now I know is needed

    $ifd0->addEntry($comment);
after
    $comment = new PelEntryUserComment();
    $comment->setValue('Edited by PEL');

but I have a different problem:
I can only edit the field UserComment when it is empty and passed value is 
not recognized by editor like acdsee or Exif Pilot Pro.

is it a known matter? or I mistake in substantial way to write pel php 
commands?




//-------------------------------------------------

MY PRECEDENT QUESTION:

Hi,
I'm trying to write UserComment but pel don't do it..
this is my php code

//-------------------------------------------------

$img = 'my_images_path';
require_once('pel/PelJpeg.php');
$jpeg = new PelJpeg($img);
$ifd0 = $jpeg->getExif()->getTiff()->getIfd();
$artist = $ifd0->getEntry(PelTag::ARTIST);
$artist->setValue('Edited by PEL');
$comment = new PelEntryUserComment();
$comment->setValue('Edited by PEL');
file_put_contents($img, $jpeg->getBytes());

//----------------------------------------

problem writing UserComment

Pippo Fresta — 2010-09-05T23:04:45

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image rotates back to original position

Peter — 2010-08-13T00:11:18

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[ pel-Bugs-3017880 ] getEntry(PelTag::IMAGE_UNIQUE_ID) always returnsnull

SourceForge.net — 2010-07-21T15:40:39

Bugs item #3017880, was opened at 2010-06-18 04:28
Message generated for change (Comment added) made by lsolesen
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=650322&aid=3017880&group_id=108380

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: Parsing
Group: PEL Version 0.9.x
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Fred N (fnplus)
Assigned to: Nobody/Anonymous (nobody)
Summary: getEntry(PelTag::IMAGE_UNIQUE_ID) always returns null

Initial Comment:
I clear the Exif data of a jpeg and then add a new entry and this process works properly, except with the PelTag of IMAGE_UNIQUE_ID. Once an image has been processed with it, it should now have a new entry for SOFTWARE, for example, so if I run the script again on the image that was just processed, instead of $software returning null, it will return a value, which means it only ne

[ pel-Bugs-3017880 ] getEntry(PelTag::IMAGE_UNIQUE_ID) always returnsnull

SourceForge.net — 2010-06-18T04:28:16

Bugs item #3017880, was opened at 2010-06-18 00:28
Message generated for change (Tracker Item Submitted) made by fnplus
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=650322&aid=3017880&group_id=108380

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: Parsing
Group: PEL Version 0.9.x
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Fred N (fnplus)
Assigned to: Nobody/Anonymous (nobody)
Summary: getEntry(PelTag::IMAGE_UNIQUE_ID) always returns null

Initial Comment:
I clear the Exif data of a jpeg and then add a new entry and this process works properly, except with the PelTag of IMAGE_UNIQUE_ID. Once an image has been processed with it, it should now have a new entry for SOFTWARE, for example, so if I run the script again on the image that was just processed, instead of $software returning null, it will return a value, which means it

[ pel-Support Requests-2993747 ] add/edit orientation tag on jpg?

SourceForge.net — 2010-04-28T18:30:11

Support Requests item #2993747, was opened at 2010-04-28 14:30
Message generated for change (Tracker Item Submitted) made by mattgilbertnet
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https://sourceforge.net/tracker/?func=detail&atid=650323&aid=2993747&group_id=108380

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including the initial issue submission, for this request,
not just the latest update.
Category: None
Group: None
Status: Open
Priority: 5
Private: No
Submitted By: Matt Gilbert (mattgilbertnet)
Assigned to: Nobody/Anonymous (nobody)
Summary: add/edit orientation tag on jpg?

Initial Comment:
How do I add/edit an orientation tag to a jpg? I've tried editting the edit-description.php example to do this, but no luck so far. Here is my code:

$exif_orientation = 6; // 90CW, tested with in exiftool

drupal_set_message('Reading file "'.$input.'".');
$data = new PelDataWindow(file_get_contents($input));

/* The static isValid methods in PelJpeg and PelTiff will tell us in
 * an efficient

[ pel-Bugs-2979466 ] endless loop in PelIfd->load

SourceForge.net — 2010-03-30T15:44:31

Bugs item #2979466, was opened at 2010-03-30 15:44
Message generated for change (Tracker Item Submitted) made by nobody
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=650322&aid=2979466&group_id=108380

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: Parsing
Group: PEL Version 0.9.x
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: endless loop in PelIfd->load

Initial Comment:
I get "Fatal error: Allowed memory size of xxx bytes exhausted" while trying to read some images (see attached file) due to an endless loop in PelIfd which repeatedly loads itself (line: 240)

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=650322&aid=2979466&group_id=108380

----------

[ pel-Support Requests-1741348 ] ASCII fields truncated by 1 character

SourceForge.net — 2010-03-17T23:11:31

Support Requests item #1741348, was opened at 2007-06-22 18:25
Message generated for change (Settings changed) made by grahamshepherd
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Category: None
Group: None
Priority: 5
Private: No
Submitted By: Graham Shepherd (grahamshepherd)
Assigned to: Nobody/Anonymous (nobody)
Summary: ASCII fields truncated by 1 character

Initial Comment:
I use PEL within Drupal Exif module.
I enter ASCII fields into jpeg files using Exifer:
Exif Description, Artist, Copyright (author and editor) and User comment.
All fields show correctly on the uploaded image using Irfanview, Opanda and Exifer. 
However, the Drupal displayed fields Description and Artist are always truncated by one character. 
Sometimes, but not always, the Comment field is also truncat

[ pel-Feature Requests-2906207 ] GIF and PNG Support

SourceForge.net — 2010-03-11T02:20:18

Feature Requests item #2906207, was opened at 2009-11-30 19:16
Message generated for change (Settings changed) made by sf-robot
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Category: None
Group: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: GIF and PNG Support

Initial Comment:
Hello
I would to request a way to support GIF and PNG comment entries, since GD lacks the hability to do that.
Attached its some code which shows how to do it in PHP for GIF support but it is still very much incomplete, since it only supports incremental comment adds onto the file, and the modified file becames corrupted so that windows preview can't view the file properly. The browsers (ff and ie) view the changed file correctly.

[ pel-Feature Requests-1462964 ] example of read / display

SourceForge.net — 2010-02-24T10:46:17

Feature Requests item #1462964, was opened at 2006-04-02 10:00
Message generated for change (Comment added) made by lsolesen
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Category: None
Group: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Martin Geisler (mgeisler)
Summary: example of read / display

Initial Comment:
I found it very hard to get started with this library.
 It looks really useful, but there's no generic example
of reading the header info.

It should be pretty simple for those who know the
library to produce an example that opens an image and
lists all the header information pel can see.   I tried
to do this and got unexpected errors and found the API
very confusing.

I strongly expected to be able to do something like:

foreach (