According to the actual requirements

a scheme of image focusing system based on OMAP processor was proposed

and the hardware design of interface with touch-LCD was introduced in detail. Then

the relevant Linux drivers were analyzed and two key problems in the application

the transform of image resolution and the form of touch-dot window

were discussed. Therefore

the inputting image data and focusing window could be displayed on the LCD proportionally. When the auto-selecting focusing window didnt meet the needs

touch screen could be used to readjust it. As a result

the quick manual selection and adjustment of focusing window was implemented

which met the special need of image focusing system in special field.