Tag Archives: photo

New Year’s Eve Light Painting

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During the first (cold) hours of 2010, I’ve done some light painting compositions with a friend. Discovering he was into this stuff and having my Canon 7D DSLR at hand, we decided to improvise a little session of long exposure shots. Here is a sample of photos we’ve took:

If you liked it, do not forget to visit the whole gallery on Maomium website and leave a comment !

Image Processing commands

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  • Convert several files from a format to another:
    convert img_*.bmp img_%04d.png
  • Resize images of the current folder to progressive jpeg. Resized images will not be greater than 600×600, but the aspect ratio will be respected:
    convert -resize 600x600 -sharpen 1 -interlace Line * pict%04d.jpg
  • Remove all metadata of a JPEG file:
    exiftool -all= image.jpg
  • Remove recursively (and in-place) the color profile and comments embedded in all PNG images:
    mogrify -verbose -monitor -strip ./*.png
  • Massive in-place optimization of all PNG images available in sub-directories:
    find ./ -iname "*.png" -exec pngcrush "{}" "{}.crushed" \; -exec mv "{}.crushed" "{}" \;
  • Same as above, but remove all known chunks, those encoding color profiles, gamma and text, and only keeps transparency chunks:

    find ./ -iname "*.png" -exec pngcrush -rem alla "{}" "{}.crushed" \; -exec mv "{}.crushed" "{}" \;
  • Lossless optimization of JPEG files:

    find . -iname "*.jpg" -exec jpegtran -optimize -outfile "{}.optimized.jpeg" "{}" \;