Sure, here’s how I delete photos from Imgur.
First make sure you’re signed in at the upper right of the screen. Then go to your Images view, which is the first option in the drop down menu under your user name, again in the upper right of the screen. The menu pops down when you hover the mouse over your name.
In the Images view when you hover the mouse over one of the picture thumbnails the palette and red X that SubRosa described will appear in the thumbnail’s lower corners, like the third one down in the far right
row column
in this screenshot.
Click on the red X and a new bar will appear directly above the grid of thumbnails showing your options to Hide or Delete the selected ones,
like in this screenshot. Click on the Delete button and the pictures you have selected are deleted.
You have to be in your Images to do this, not in your Albums. From Images you can sort by album from the drop down menu in the upper left so that it’s easier to find a certain picture, but if you go to Albums you can’t delete them, or at least that’s what I’ve found.
Edit: oops, I said row but meant column.