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I'm guessing that you are envisioning that the information displayed by metadata viewers is extracted by analyzing the image in some way, creating descriptive information from the pixels which make up the image. That's not the case. It's written to the files by the digital cameras (or scanners) that create them, according to several standards, including the ...


You could use python and one of a number of libraries, (such as SciPy/Numpy), to get a measure of the noise in the image as shown in the answer to this Stack Overflow question. Some of the same libraries and also perform image scaling and denoise e.g. SciKit Image has both denoise and scale image functions. You could also take a look at the python ...


Most of the OSX GUI applications for manipulating exif information rely on Phil Harvey's exiftool, an open source perl library and cross-platform command-line tool for manipulating EXIF information. HoudahGPS, Geotagger, and GPSPhotoLinker all rely on exiftool to write EXIF tags. And since exiftool can write to Canon RAW files, these apps are likely to be ...


I have had quite good success with houdahGeo, in particular with Aperture. For this you open the photos you want to geotag from houdahGeo (you can open photos already in your Aperture Library) select them and then geotag them using either a map or a GPX file. Then you can reverse geocode and write the data back to the original Raw files. HoudahGeo then ...


Lightroom uses a SQLite database to hold its keyword information. SQLite does have size limits, but they are so high that it simply isn't worth worrying about them. You can have zillions of keywords in your catalog. HOWEVER. It is not only possible to make Lightroom slow to a crawl, I can do it at will. Heavy keyword use is one of the easiest and most ...

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