Do you want to transfer photos from laptop to iPad? If so, you can follow the below steps to do that.
You could also try to transfer photos from PC to iPhone Camera Roll via the iTunes Photo Sync. You need to make sure that you've downloaded and installed iTunes on your PC and connected iPhone to PC via the iPhone USB cable. Then, the below steps would show you how to transfer photos from PC to Camera Roll.
1. Click on this icon and you will see some more menu on the left side-bar. Select the Photos menu item to open the Sync Photos screen.
2. Tick on the Sync Photos from checkbox to allow iTunes to sync photos from your desktop. Then from the drop-down next to the checkbox you can select which folder you want to sync from.
3. You can then choose whether you want to sync the whole folder, along with its subfolders, or select individual folders. And you can choose whether videos would need to be synced as well.
4. You can also, instead of choosing a local folder, select to sync from the iPhoto. Here you can then further pick which Albums of Events to be included if you wish not to sync the whole content of your iPhoto.
When you finish your selection click on the Apply button and iTunes will start syncing your photos to your iDevice.
This method of using iTunes to transfer photos/videos are very suitable when you want to transfer a big number of photos and videos. And since it's not using either the Internet or wireless connection, the transfer rate would be pretty fast and reliable and free.
For more methods, check: How to Transfer Photos from PC to iPhone