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High definition video on IP cameras is usually mentioned as either 720p or 1080p. 1080p, or full HD resolution, records images that measure 1920 x 1080 pixels; 720p HD images measure 1280 x 720 pixels. The “p” in 720p and 1080p stands for “progressive scan,” which helps minimize blur caused by movement. Older-style analog CCTV cameras measure image resolution in horizontal lines, called TVL. the upper the amount of lines in a picture , the upper the resolution. New IP cameras use different technology, and measure resolution through pixels. IP cameras can fit more pixels into a picture than CCTV cameras can fit horizontal lines, supplying you with a better quality image. HD IP cameras use even more pixels than non-HD cameras, supplying you with the simplest image quality available. cctv camera price in bangladesh To use an HD camera for face recognition , the face often must measure a particular pixel size. you'll also got to consider the lighting and therefore the angle the person is at while facing the camera—bad lighting or too sharp of an angle can make it hard to spot people. For more information on pixel count and face recognition , speak with our surveillance experts for specific recommendations for your project. HD cameras record images during a widescreen ratio of 16:9, which suggests the image is larger and wider than a non-HD camera. This wider image is what allows you to potentially monitor an equivalent area with fewer HD cameras, also allowing you to save lots of money on and time on installation. Non-HD IP cameras often have a facet ratio of 4:3. By recording video with more pixels during a wider ratio , high definition cameras offer you detailed images not available with CCTV analog or non-HD IP cameras.