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by garik

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43

The key is adding some specific tags every time you import. I use Aperture (which is Mac-only,) but Lightroom has similar capabilities, as does iphoto. What you need to tag depends on what you shoot, and what you think you might be looking for someday, but this works for me: The people in the pictures. I use Apple's "Faces" feature to tag people in the ...


23

Someone referred me once to Exposure Plot. This is a free Windows utility which is very simple. It shows you graphs of different parameters, one of them being focal-length. If you already use image management application like Lightroom or Bibble Pro, then you can also usually see that data in the filter interface. For Lightroom for example, you need to ...


19

Focal length is a measure of the lens's ability to bend light. As such this figure doesn't change when you use a smaller sensor. What actually happens when you use a smaller sensor is that your field of view narrows. Field of view is dependant both on the focal length and the format (the size of your film or sensor). The ubiquity of 35mm film among amateur ...


16

Maybe Photoshop Lightroom is a good answer for this. Especially because of the tagging functionality...


16

Picasa stores faces information in the .picasa.ini files: [test.jpg] faces=rect64(1eb1929f885e),15441a598f9f1866 backuphash=29866 The id numbers can be found in the contacts.xml file which stores all the contacts of your pictures: <contact id="15441a598f9f1866" name="Test Test" display="Test" modified_time="2010-05-13T17:19:46+01:00" ...


15

I sometimes do a little bit of stock photography, where tagging is extremely important to get your images appearing in sales correctly. I aim to tag all of my stock photos by thinking about the following: People - who is in the shot? Places - where was this taken? Include significant places, streets, towns, cities, countries, regions. Alternatively, use ...


14

The values are arbitrary and meaningless, and only serve to confuse people. The EXIF standard seems to imply that if the tag is missing, 72 is the (still-meaningless) default. However, it is apparently mandatory for the TIFF standard, from which the JPEG/EXIF format basically inherits everything. So maybe it has to have some value to properly comply with the ...


13

I used the EXIF tags over thousands of images to determine the focal lengths I tend to use, to try to help me decide which lens I should buy first when I upgrade.


13

It is in the EXIF data, but the info is under Canon tag. For any EXIF-related tasks, I wholeheartedly recommend ExifTool by Phil Harvey. Here's an example of a real file (which coincidentally was shot with Canon 450D) $ exiftool -canon:"WB_RGGB*" -canon:"*temp*" MG_5366.CR2 WB RGGB Levels As Shot : 2270 1024 1024 1520 WB RGGB Levels Auto ...


13

Privacy reasons are certainly the main concern. The second concern is bandwidth. Stripping EXIF information makes images considerably lighter at web-sizes. This makes it a better experience of 99% of viewers who do not care about how the image was made. Lastly, the information may not exist. A lot of images on the web are composites, be it HDR/Exposure ...


12

In addition to the obvious things like keywords, I use a metadata preset in Lightroom to automatically add my name, contact information, website URL, and copyright information to every photo as it is imported. Proving copyright infringement is significantly easier if you have contact info in the metadata, since most infringers aren't savvy enough to remove ...


12

Adobe's XMP metadata standard supports information defined by the Metadata Working Group (MWG), which includes a definition of how to store face tagged data. See: Adobe XMP: http://www.adobe.com/products/xmp/standards.html MWG: http://www.metadataworkinggroup.com/ where you can click on the specifications, download the PDF, and then look at page 51 ...


12

I just found the answer. Lightroom will change the date/time easily by selecting the image you know the proper time for, then select all others to be changed - similar to how develop sync settings works. After the selection is made, click Metadata -> Edit Capture Time Select Change to a specified date and time Enter the proper date and time for that ...


11

There is not. IPTC, another image metadata standard, also does not contain a "People" field. There's a Contact field, but that is used for contact information for the photographer. Most people I know will store people as keywords. The main debate is whether or not to include spaces (would a photo of me be tagged as aaronhockley or as "aaron hockley"?). ...


11

It doesn't make a lot of sense to organize photos by something that is already in the EXIF data, like the date the photos were taken. I organize my photos in folders by event/location. The most important thing is to make sure you tag as much as possible when you import. The chances of going back later to tag are basically nil, so you need to make sure to do ...


11

I think you can do it with ExifTool: exiftool -v "-FileModifyDate>DateTimeOriginal" * Tried on some copies of jpegs and it seems to have worked.


11

I wrote mine up here: http://www.chuqui.com/2010/10/some-thoughts-on-lightroom-keywords/ it's gotten really nice feedback and been pointed to by a good number of bloggers, and it works really well for me.


11

I'm a fan of Adobe Lightroom - its way of working seems to fit my mental model so I find it fairly natural to use. That does depend on you tagging the photos with appropriate metadata of course and not everyone thinks the same as me, so you may not get on with it. Picasa has matured nicely over the years and has a nice "face finder" that does a pretty ...


11

Most of the time you have more use of the position from where you took the photo. If you know from where the picture was taken, you can often from the photo see exactly which direction the camera was pointed. If you know the position of the subject, you might be able to see approximately which direction it was taken from, but seldom the exact position. Of ...


11

This is the inverse of Is there any software which will set the EXIF Dates based on the file's modification date?, and I'm sure all of the programs listed there will apply. jhead is my suggestion. eg the command jhead -ft *.jpg sets a bunch of files so that the file timestamp matches exif — but it doesn't do recursion into subdirectories. (You could ...


10

If you don't want to pay for Adobe Lightroom or Apple Aperture, you could go with Apple's iPhoto or Google's Picasa. I'm most familiar with iPhoto; it does a fair amount of hand-holding when it comes to organizing photos. Smart Albums are really nice; you write the filter logic, and iPhoto shows you the matching photos on an ongoing basis. Works wonders for ...


10

EXIF is a standard that programs such as Photoshop support. Within the standard is a reservation for 'Maker Notes' or custom EXIF fields that camera manufacturers use for a variety of reasons (such as shutter count in Canon 1D series). Many of these Maker Notes are used by the camera manufacturer for internal purposes, and while exposed within the image, are ...


10

Picasa Web Albums work best. It meets the following of your requirements: You can catalog a large number of photos (you may need to purchase additional storage from Google based on image resolution, but its relatively cheap) You can tag individuals and add categories. You can customize your privacy settings and sharing options. It's really easy to set-up, ...


10

It is sadly impossible to to prove when an image (or any file for that matter) originated. It is possible (if the author wants to) to prove that a file existed prior to a given time by signing the file from a third party time stamping server (through which the third party proves that the file existed at the time of the signing) but such information is not ...


9

ExifTool can do that for you. Example from the linked page: exiftool -AllDates-=1 DIR This would set all date fields in image in the directory DIR back one hour. ExifTool is very powerful when it comes to manipulating meta data in images. I would recommend to practice on copies of the files to get the command to do what you want, before unleashing it on ...


9

This article claims to provide a method for getting the shutter count for the 7D. In short, you install gPhoto2 and run the command: photo2 --get-config /main/status/shuttercounter Version 2.4.11 (released on Apr 17th, 2011) has been tested and works with 500D. A little warning: under Ubuntu Linux, my first attempts failed because of the following error: ...


9

You can do setting, incrementing, decrementing Exif-Date (and File-Dates) with following tools: XnView (W32): [mark pictures to be adjusted], Tools -> Change Timestamp exfitool (Multi): exiftool "-AllDates+=1:12:28 14:54:32" -overwrite_original_in_place -verbose ./ (+1 year, 12 month, 28 days, 14 hours, 54 minutes, 32 seconds) either list them, if-them ...


9

Yes, this capability exists to some extent, but not through "signing" the image in the normal sense. It's based on the sensor noise patterns. Jan Lukáš, Jessica Fridrich, and Miroslav Golja (and a few others) at SUNY Binghamton have done work relating to two fields - identification of digital cameras using sensor noise patterns and identification of digital ...


9

The most important are the ones that are needed to help the decision at hand. This will depends on the context and who looking at images. For everyone: Date & Time - Are probably most important. They are often different than the file-data since that may reflect when the files were copied, shared, sent, edited, etc. To look for a photo of an event or ...


9

The first thing I did not know from the beginning was that keywords are hierarchical. Based on your question, I see you know that so you are already ahead of where I started. Other than that: Make clear a hierarchy that has an unambiguous meaning even at the expense of being redundant. For example, city hall can be anywhere but montreal city hall has to ...



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