How to delete imported pictures from an old computer off of my iPhone 4S?

I used to have a Windows 7 PC, but it became really slow and my phone wouldn't work with the iTunes on my computer so I got a new Mac for christmas. My old computer automatically imported TONS of pictures onto my phone (without me wanting them) and it's taking up most of the memory on my iPhone. I really just want to get rid of these pictures. I can't delete it from my phone, my phone still doesn't work with my old computer, and now I can only use iTunes on my Mac. What do I do? Thanks!

Added (1). That doesn't help at all I don't think you understand. There are 7 separate albums of picture that were my albums from my old computer imported into my photos on my phone. It's not in the camera roll, they are separate albums. There's NO way to delete them on my phone. The only way I have found online to solve this problem is to delete the pics from my old computer but I can't do that.

Why can't you delete them from your phone, you don't need to use a computer to do that just highlight it on the phone and choose delete it will work if your phone is working properly.

If you mean you want to move them to your new computer just put itunes on your new computer and sign into your existing account.

Or download a free app called bump it allows you to bump things from your phone to your computer easily and also to other devices back and forth that have it loaded it even lets you bump from the apple operating system to and from the android operating system.

It's an amazing program.

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