Benjamin recently posted a diagram with the results of my FocalApp application applied to all his images. Here’re the results with my images:
Obviously I only posess the 18-55mm Kit lens and I use smaller focal lenths more often. The Google chart API is quite handy for such simple statistics.
I changed my FocalApp java application a little bit. First, there was sometimes a memory exception as the old version did a “new File()” in each loop iteration and apparently the garbage collector couldn’t catch up. I moved the file-open operation into an own class method and now the GC seems to get its job done. Second, I added some more command line parameters for specifying the camera model, the file extensions and the file name pattern – which all filter the resulting image file list used for the focal length count. Hence one can now say “Only count the images whose EXIF data’s camera model is a Canon 300D, but only the CRW files and only the files starting with CRW_50”. In addition I added a little help screen:
Build:
javac -Xlint:unchecked -classpath .;metadata-extractor-2.4.0-beta-1.jar FocalApp.java
jar cfm FocalApp.jar Manifest.txt *.class
Usage:
java -jar FocalApp.jar [Options]
Description:
For all images in the given directory and its subdirectories read the
lenses' focal length from the exif data and print a summary of how
often the particular focal lengths are used.
Currently this program works with the following image types:
* JPEG
* CRW - Canon Raw
* CR2 - Canon Raw v2
* NEF - Nikon Raw
* ARW - Sony Raw
* TIF/TIFF
Options:
-imagepath path for the images to work on (required)
-camera string with the name of the camera, the program will (optional)
only count the images containing that camera name
-fileext only count images with that file extension(s) (optional)
-filename only count images matching this regular expression (optional)
Examples:
java -jar FocalApp.jar -imagedir "D:testimages"
java -jar FocalApp.jar -imagedir "D:testimages" -camera "Canon EOS 30D"
-fileext "jpg,crw" -filename "^CRW(.*)"
Feel free to get the new version here. You can find the original blog post to the FocalApp here.
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