Embodiments of the present invention comprise methods and systems for image complexity estimation and selective complexity-based image processing. The APSM includes first and second phase shifting areas and a first opaque pattern. The compositions of the subject invention can be used to achieve a number of advantageous results including: enhancing the growth rates of young animals, osteogenic stimulation, strengthening the skeletal structure, and treating osteoporosis. One method includes forming a hole through one of the panes of an IG unit, flowing gas through the hole, and sealing the hole with an optically clear sealant. The apparatus includes a pressure-generating device for generating pressure for conveying the fluid, a plurality of processing areas for processing the fluid, a valve which is disposed between the processing areas and controls the fluid flow, and a pressure-relieving device for relieving the pressure in the channel.