How to figure out which photos on my iPhone 4 were taken in HD?

I recently found out that the reason why all of my photos from my iPhone were not uploading to iPhoto is because some of them were taken in HD, and those (for some reason) can't be imported to iPhoto.

Added (1). I don't know which pictures are in HD because the import stops all of a sudden and says that an error occurred. It doesn't tell me which photos are in HD, which are the ones that stopped the import.

Go gallery find the picture press option and change the type of picture then you can easily upload

Well the ones that don't upload will be the hd ones Correct? You can also right click photo hit properties then it will show you a higher resolution than the ones that did upload.

The photos you have taken can't show on iPhone are taken in HD