Using mirrors, it is possible to reverse the image so that it can be projected right-side-up. With an angled mirror projecting onto a glass top, the image can be traced onto tracing paper.
The earliest written record of camera obscura is found in the writings of Mozi (470 to 390 BC). This Chinese philosopher correctly asserted that the image transmitted in a camera obscura is flipped upside down because light travels in straight lines from its source. Hie and his disciples developed the theory of optics.
The Greek philosopher Aristotle (384 to 322 BCE) was familiar with the principle of the camera obscura. He viewed the crescent shape of a partially eclipsed sun projected on the ground through the holes in the leaves of a tree.
An Italian military manuscript from the 1700s had the following image.
2. The second thing that French inventor Joseph Nicéphore Niépce used in his invention of the camera is the fact that some substances are visibly altered by exposure to light. Although various scientists had failed attempts, the French inventor was the first to use a camera and chemical substances to reproduce a permanent photographic image, although the exposure took several days. People who worked with Niépce continued his work and improved the process to require only minutes of exposure. In 1839 the first commercial camera was made available for sale.
In 2014 humans took over one trillion photos. In fact, ten percent of all the photos ever taken were taken in the past year. Due to digital technology the number of photos people are taking is increasing exponentially. This growth is demonstrated by the upload statistics on the Internet.