What group determined that 1000 pixels per inch is the minimum resolution for 1:1 photography?

The group that determined that 1000 pixels per inch is the minimum resolution for 1:1 photography is the National Institute of Standards and Technology (NIST). NIST is a federal agency that develops and promotes measurement standards and technologies in various fields, including imaging and photography. Their research and standards often inform best practices for digital imaging, ensuring high-quality outputs and consistency across different systems.

The significance of the 1000 pixels per inch resolution lies in its ability to maintain detail and clarity when reproducing images at a 1:1 scale. This threshold helps in achieving sharp and clear images that are suitable for professional applications. Other organizations such as ISO (International Organization for Standardization) focus on establishing international standards across a broader range of industries, whereas groups like ANSI (American National Standards Institute) and FIA (Film Industry Association) have different focuses that do not specifically address digital photography resolution standards in the same manner. Therefore, NIST's specific recommendation relates directly to the requirements needed for high-resolution photography.