First, you need to connect your iPad to the computer and launch iTunes. Then, open the pictures folder under "My Documents" on your computer. Click on the pictures button and highlight the pictures that you want to transfer and click "Ok" to transfer the pictures to your "Photos" app library. See more details at http://www.ehow.com/how_8149174_put-pictures-ipad.html.
If you want to transfer photo from iPad to computer,you can use iStonsoft iPad/iPhone/iPod to Computer Transfer tools,Believe you can quickly transfer pictures from iPad to your computer. http://goo.gl/EKamb