Comment by guan
14 years ago
The user does explicitly either take the photo inside the Instagram app or select it. Note that the final button that published the photo to the user’s stream is labeled Done, not Upload. They don’t just arbitrarily upload photos from the camera roll or from the camera before the user has tapped the camera shutter button.
EDIT: And as others have pointed out, photos are only uploaded after the user has selected a filter and tapped the green check mark, not as soon as they are taken.
On the Android version it says Upload instead of Done. I can't tell what point it starts uploading but it seems to appear pretty quick on my page.