Megapixel technology enables network cameras to provide higher resolution of video images than analog CCTV, i.e. the ability to see more details or have a wider coverage – a key consideration in video surveillance applications. With megapixel network camera’s, the resolution is usually 4x better than an analog CCTV camera and often times 15-20 times better. For example, the highest resolution typically found in analog cameras is 640×480 or 307K pixels (.3 megapixels). The baseline megapixel camera is 1.3 megapixels or 4x that of analog. Take a 4 megapixel camera registering a 2032×1920 resolution. It has roughly 13x the resolution of a standard analog camera.
Combining megapixel network cameras with a selection of non-megapixel network cameras that are optimized for other needs (such as powerful optical zoom, extreme light sensitivity or low cost) creates video surveillance installations that are effective, reliable and cost-efficient.
Megapixel surveillance: megapixel network cameras have an important role to play in video surveillance applications. They can provide images that are more useful, with more image detail and with wider coverage than standard resolution cameras. Depending on your requirements, ACTi network cameras can bring the advantages of megapixel and network technology to your surveillance application. The variation of requirements within video surveillance is enormous. However, it can be boiled down to a choice between two different priorities:
General overview: In this case, the aim is to obtain a general overview of a scene. In a shopping mall, for instance, your primary goal of a camera installation may be to watch for the presence of people and view their movements – not the identification of individuals. Or you may want to see whether a parking lot is full or has empty spaces, rather than identify individual cars or read license plates. For overview applications, sufficient resolution and coverage of a scene may be achieved with a single megapixel network camera or a number of non-megapixel network cameras.
High detail: These are the demanding situations where you need to be able to identify persons or objects in a scene. This could be point-of-sales monitoring where it is necessary to clearly see every item a customer is purchasing, or situations where you need to be able to identify a face. High detail images can be achieved by installing a network camera with an optical zoom (not digital) to enable a closer view of the area of interest, or by placing the camera close to the area to be monitored. Using a megapixel network camera in all such cases will provide even higher resolution images with more details than a non-megapixel network camera.