this image above contains three of my photographs that i edited with photoshop by adjusting the threshold of each of them.
This photograph is about a pink rose bush with a rose in the middle which is sharply focused and the background is mostly the green part of the bush alongside with the clear blue sky background, it was taken using the AV settings on the camera so that it focuses on the rose and the background is unfocused.
After using the threshold adjustment i put the threshold on almost midway to the left so that only the focused part which is the flower is white and the background is black.
this photograph above was taken indoors using a phones camera and the natural light from the window was used to create the shadows around the paper, the paper was made into a zigzag shape by hand to create that shadow effect.
the photo was already edited by phone quick photo editing, then it was downloaded on the computer and was edited with photoshop in which the threshold was adjusted to create an effect in which the shadows where black and the paper is white.