12/31/2022 0 Comments Cctv pixel density calculator![]() ![]() Your static camera will have a specific fixed lens size determining the focal length (f number). If you calibrate the camera you could do these calculations theoretically, since you could know the width of the field of view in advance, but it is a little bit more complicated. ![]() Each line of your image will have a different pixel density. Note that this measure will not be constant across the vertical axis of your camera. The easiest way to calculate ppm for an specific scene is to point the camera where you want to calculate ppm, and then divide the number of pixels of your image by the distance in meters of the field of view of you camera in that specific point. Ppm = ImageWidth (in pixels) / Field of view (in meters) To calculate pixel density (pixel per meter) you need the number of horizontal pixels of the image or video source and the width in meters of the scene where you are looking at. For instance, you need around 130 ppm to have enough detail to accurately recognize facial detail and indentify license plates. Many manufacturers use the pixels per meter measure as a metric of video surveillance image quality. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
January 2023
Categories |