How do you post pictures from LBP. :I
When you take a picture, you gotta go to it in your Popit Menu and hit the Square button to bring up a menu that will have a button called Export to HDD, once it finishes, it will tell you at the top of the screen, then quit the game, go to the Photos folder on your XMB, and if you have the photos sorted by Album, you'll see a album called LittleBigPlanet, go to it, and it'll be in there, then you gotta copy it over to a device that can transfer files over to a PC
Being that i don't have a device like that, i used my MP3 Player which can view photos and have the PS3 transfer photos onto it then onto the laptop/PC