On some systems, it may be neededĬhange the first line of the program to point to your own copy of Perl. Only use exifcleaner on copies ofĬopy the file to a suitable directory, for example /usr/local/bin Solaris on SPARC, but have had image files thrashed on a little-endianĬomputer (Linux on x86). I have sucessfully runĮxifcleaner on big-endian platforms like MacOSX on PowerPC and I have not fully investigated when this happens, but I Back up important files first.Įxifcleaner has been reported to corrupt image files on someĬomputers. Programs can also alter the structure of the files and insert unexpectedĭata fields.
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Photo editing software and camera-to-computer image transfer EachĬamera model stores the meta data and the image data a little bitĭifferently, and the files may contain sections that the program can't Of your files, for example when preparing them for web publishing.Īlso note that this software may not work with your images. Sharpening etc, that will be lost after processing. Typically contains settings like digital zoom ratio, autofocus position, Some of your camera's proprietary metadata. Note that while removing the blank sections doesn't make you loseĪnything, removing the MakerNotes actually has the effect that you lose The MakerNote after the image already is imported. Unfortunately it doesn't seem possible to erase A solution to this is to strip the MakerNote before importing If you have say 6000 photos, andĮach has a 40KB MakerNote included, this makes "Library.iPhoto" expand to The MakerNote and any blank sections, from all your photos into one singleĬombined file called "Library.iPhoto". Apparently, iPhoto 5 stores the Exif data, including IPhoto version 5 and experience that the program takes a long time both to Up to 55 kbytes depending on camera model.Īnother reason for reducing the Exif data size is if you're using Apple Sections from the files while keeping the rest of the Exif data, saving This program will remove the MakerNote section and the blank At the same time it mayīe desired to keep the basic metadata such as timestamp, aperture, shutter
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Visitors and it just makes download times longer. Large MakerNotes is of no use to the web page Quite silly to keep a metadata section in the file that even may be larger Pixels in width, and with image file sizes of 20 to 60 kbytes, it feels
When publishing digicam pictures on the web, downscaled to 500 or 600 (consisting of NUL characters) in them that are totally a waste of space. Image, but larger than the Exif integral thumbnail that is present too.Īlso, files from some cameras have several kilobytes of blank sections JPEG picture for preview purposes, with lower resolution than the main The larger MakerNotes often contain a whole The MakerNote sections from different cameras usually are between 400Īnd 1600 bytes in length, but some cameras have MakerNote sections in theĢ5,000 to 55,000 byte range. Values that are not part of the standard in a special "MakerNote" section. Standardized, like aperture value, shutter time, focal length, whether theįlash fired etc, but it also is possible for the camera maker to store Metadata about the picture, like the date and time the picture was takenĪnd all the settings that the camera used. Is an extension to the JPEG file format, that makes it possible to store Most digital still cameras save the pictures in the Exif file format. You can check the names of the tags you want to remove with It has severe endian problems, and probably won't work on little-endian computers, so be very careful! I just keep this online for reference purposes, and if someone wants to see an early implementation of EXIF manipulation code. Since I wrote this in 20 things have changed, and there now are much better tools available. MakerNote section and any blank sections in the files.ĭo not use this program. Exifcleaner exifcleaner will make Exif image files smaller by removing both any
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