Motion Detection. Introduction Edit One of the nicest features of CHDK is its ability to add motion detection to a Canon "Point & Shoot" camera.
This functionality is provided through special scripting commands which enable flexible implementation of many clever motion detection programs. Two particularly popular uses of motion detection include lightning and fireworks photography. Scripting Functions To use the CHDK motion detection functions, you need to have a suitable script loaded on your camera. Note : the uBASIC and LUA motion detection commands each take as many as 16 input parameters. Key Concepts Edit CHDK motion detection scripting commands is based on the following concepts : Zones : The camera field of view is broken into a grid of zones.
Exclusion Zone : The motion detection zones defined above can be set up so that part of the field of view is ignored. Detection Modes : CHDK can be configured to trigger on different parts of the image. Function : md_detect_motion uBASIC : e : measure_interval. Motion Detection Algorithms. Introduction There are many approaches for motion detection in a continuous video stream.
All of them are based on comparing of the current video frame with one from the previous frames or with something that we'll call background. In this article, I'll try to describe some of the most common approaches.
10 Tips for taking Powerful Motion Blur Pictures. There are two types of motion blur pictures.
The first type is where you keep your surroundings static and bring out motion in the subject. This works pretty well with pictures where only a part of the subject is moving, like the arms or legs. The other type of blur is where you keep the subject mostly in focus and get a motion blur effect on the background. This works well when the entire subject is in motion, just like the bike in the image above. Here are a few quick pointers for taking some cool motion blur shots. 1. The most important tip that you have to remember when shooting a moving object is to be alert and ready to shoot. 2. Concentrate on your surroundings. 3. For the first type of motion blur, keep the camera still so that the subject is blurred. 4.
Motion blur is all about shutter speed. 5. Start tracking the subject before you press the shutter, and don’t stop until the photo has been taken. 6. Set the Focus to S-AF or Servo. 7. Set the ISO to the lowest possible setting.