Use Thumbnail.aspx ...

PlaceholderResize max dimension to 300

.. /thumbnail.aspx?img=/A/LEGO-2MenShuttle/2MenShuttle21.jpg&maxsize=300

http://aspnot.net/a/thumbnail/thumbnail.aspx?img=/A/LEGO-2MenShuttle/2MenShuttle21.jpg&maxsize=300

PlaceholderResize and crop to square

.. /thumbnail.aspx?img=/A/LEGO-2MenShuttle/2MenShuttle21.jpg&maxsize=300&FSR=1

http://aspnot.net/a/thumbnail/thumbnail.aspx?img=/A/LEGO-2MenShuttle/2MenShuttle21.jpg&maxsize=300&FSR=1

PlaceholderResize, crop and make Black and White

.. /thumbnail.aspx?img=/A/LEGO-2MenShuttle/2MenShuttle21.jpg&maxsize=300&FSR=1&SE=1

http://aspnot.net/a/thumbnail/thumbnail.aspx?img=/A/LEGO-2MenShuttle/2MenShuttle21.jpg&maxsize=300&FSR=1&SE=1

PlaceholderResize, crop and make Grayscale

.. /thumbnail.aspx?img=/A/LEGO-2MenShuttle/2MenShuttle21.jpg&maxsize=300&FSR=1&SE=2

http://aspnot.net/a/thumbnail/thumbnail.aspx?img=/A/LEGO-2MenShuttle/2MenShuttle21.jpg&maxsize=300&FSR=1&SE=2

PlaceholderResize, crop and add sepia effect

.. /thumbnail.aspx?img=/A/LEGO-2MenShuttle/2MenShuttle21.jpg&maxsize=300&FSR=1&SE=3

http://aspnot.net/a/thumbnail/thumbnail.aspx?img=/A/LEGO-2MenShuttle/2MenShuttle21.jpg&maxsize=300&FSR=1&SE=3

PlaceholderResize, create thumb in folder, add _th to filename

.. /thumbnailsave.aspx?img=/A/LEGO-2MenShuttle/2MenShuttle21.jpg&maxsize=300&Save2=_th

http://aspnot.net/a/thumbnail/thumbnailsave.aspx?img=/A/LEGO-2MenShuttle/2MenShuttle21.jpg&maxsize=300&Save2=_th