Pixel peeper is a term that is often used to describe a person who is overly obsessive with the technical details of digital photography. This term is often used in a negative context to describe someone who is more concerned with pixel-level detail than the overall quality of the image.
There are several other synonyms for pixel peeper, including gearhead, tech junkie, pixel peeper, and detail-aholic. Other terms that may be used include pixel phobic, pixel fascist, and pixel purist. These terms are often used in a derogatory way to describe photographers who are more interested in the technical aspects of their craft than the artistic or creative side.
While it's important to understand the technical details of digital photography, it's also important to remember that photography is a creative medium. Photographers should strive to create images that are not only technically proficient but also aesthetically pleasing and emotionally engaging.