Open source still image camera matching Camera matching Camera matching, or camera calibration, is the process of estimating camera parameters from certain features in an image. fSpy computes the approximate focal length, orientation and position of the camera in 3D space based on user defined control points in still images. The computed camera parameters can […]

Instead of focusing on wattage, which measures power or energy use, many manufacturers are now labelling their energy efficient bulbs according to lumens, which measure light output.

Some spaces just feel good, and you can’t put your finger on why. Chances are, it’s because everything is where it should be: Handles are easy to reach, drawers open unobstructed, there’s light where you need it. The key is knowing the right numbers. Whether you’re starting fresh or just adding a few upgrades, your home is sure to measure up.

This is an online virtual ruler that can be adjusted to actual size, before you use it, please set the pixels per inch to your own device.