![]() The first image is captured on a high resolution analog CCTV camera recording to a 4CIF DVR. You take a still from the image and then paste it onto a piece of paper and print it out to try and identify the people involved.īelow are two possible scenarios for what information those still images will provide. You go back to through the surveillance footage history and find the point in time when the parcel in question was collected. Imagine there is a query on who picked up a parcel from your workshop. So how will an HD image be an advantage in a practical scenario? Note the difference in clarity between the CIF and 1.3 MP in the yellow callout boxes which show a zoomed-in view of part of the image. Not only are the IP images much bigger but the level of detail they capture is much higher. The image below shows the difference in picture quality between analog (CIF and 4CIF) and IP (1.3 and 3 MP) security cameras looking at the same workshop view. So what does that mean for a CCTV image captured on a IP security camera? If these cables are close to a mains electrical cable such as power or lighting, or pass close to “noisy” electrical devices such as extractor fans or machinery the video signal can be affected as the signal voltage is only around 1v. Analog security cameras send their video signal over a coax cable or twisted pair of copper cables. IP CCTV cameras are also less prone to picture interference as the transmitted video is in IP or digital format rather than an analog signal in a conventional CCTV system. IP or megapixel cameras can go up to 8 megapixel already and our most popular model is a 4MP IP camera.ĭue to the way video is transmitted and stored on the NVR in an IP security camera system there is no loss in picture quality between what is seen “live” from the camera and what is seen when playing back the recorded image. In comparison a low megapixel format of 1280X1024 pixels gives a 1.3 megapixel resolution which is more than three times the resolution of a good analogue system. The most commonly used is 4CIF which has a resolution of 704X576 pixels or 0.4 megapixel. ![]() The maximum resolution that an analog surveillance system can provide is D1 resolution. This benefit is an important consideration with surveillance systems. Being able to see more detail in the picture means there is more potential to identify people and objects or to view a larger area of a scene. The more pixels the image has, the greater detail it captures, producing a higher quality image. Megapixel resolution uses a megapixel sensor to deliver an image with one million or more pixels. The quality of the picture captured from an HD security cameras is probably the single biggest advantage IP CCTV systems have when compared with traditional analog systems.
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