Hi John,
If you're using i.MX53 you have 2 options. You can use IOCTLs as made on example I mentioned or you can use the ipulib. (see the imx5x_IPU_LIB_UG.pdf, located at linux documentation package.
You can check the ipu unit test, located at your rootfs /unit_tests/mxc_ipudev_test.out
The source code can be extracted using LTIB using the command:
./ltib -p imx-test -m prep
The source code will be located at ltib/rpm/BUILD/imx-test-12.09.01/test
Rgds
Rogerio