Your iPhone Solves a 1,000-Year-Old Problem From the Islamic Golden Age
Modern smartphone cameras like Portrait Mode and LiDAR are algorithmic solutions to a depth-perception problem first articulated by Ibn al-Haytham in the 10th century.
When Apple introduced Portrait Mode on the iPhone 7 Plus in 2016, it wasn't solving a new problem—it was algorithmically fulfilling a question Ibn al-Haytham posed in the 10th century: how do shadows falling on a flat surface convey depth? The LiDAR sensor on the iPhone 12 Pro adds more dots to the same ancient puzzle, but the tension between a two-dimensional image and the brain's demand for three-dimensional space remains exactly where the medieval scholar left it—a problem articulated, not resolved, across a thousand years of optics.
When Apple introduced Portrait Mode on the iPhone 7 Plus in 2016, it wasn't solving a new problem—it was algorithmically fulfilling a question Ibn al-Haytham posed in the 10th century: how do shadows falling on a flat surface convey depth? The LiDAR sensor on the iPhone 12 Pro adds more dots to the same ancient puzzle, but the tension between a two-dimensional image and the brain's demand for three-dimensional space remains exactly where the medieval scholar left it—a problem articulated, not resolved, across a thousand years of optics.