Day-Night CCTV cameras must have reasonable light to show a picture. Low light BW is always better, then BW, then EXVIEW colour followed by colour. Night view cameras with IR will show pictures in no light using the range of IR. The picture will be BW under of range of IR.
IR Cameras are an excellent way of providing a picture in poor light. These can be supplemented by the use of extra IR lights.
At all times cameras will work in colour if WHITE light is used, ie a light activated by use of PIR sensor.
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What are OSD, NR, WDR, ATR, HLC? | ||||||
a, OSD: On-Screen Display. It is a menu showing all functions on the screen | ||||||
b, NR: Noise Reduction. When it is night, NR can make the snow point on the screen less to make the image clear. | ||||||
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c, WDR: Wide Dynamic Range. When the camera faces the strong light area, WDR can make those very dark areas lighter and make those very light areas clear. | ||||||
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d, ATR: Adaptive Tone-curve Reproduction(Digital Wide Dynamic Range). | ||||||
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e, HLC: High Light Compensation. | ||||||
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IP (or "Ingress Protection") ratings are defined in international standard EN 60529 (British BS EN 60529:1992, European IEC 60509:1989). They are used to define levels of sealing effectiveness of electrical enclosures against intrusion from foreign bodies (tools, dirt etc) and moisture.
The numbers that follow IP each have a specific meaning. The first indicates the degree of protection (of people) from moving parts, as well as the protection of enclosed equipment from foreign bodies. The second defines the protection level that the enclosure enjoys from various forms of moisture (drips, sprays, submersion etc). The tables below should help make sense of it:
First Digit (intrusion protection) | |
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0 | No special protection |
1 | Protection from a large part of the body such as a hand (but no protection from deliberate access); from solid objects greater than 50mm in diameter. |
2 | Protection against fingers or other object not greater than 80mm in length and 12mm in diameter. |
3 | Protection from entry by tools, wires etc, with a diameter of 2.5 mm or more. |
4 | Protection against solid bodies larger than 1mm (eg fine tools/small etc). |
5 | Protected against dust that may harm equipment. |
6 | Totally dust tight. |
Second Digit (moisture protection) | |
0 | No protection. |
1 | Protection against condensation. |
2 | Protection against water droplets deflected up to 15° from vertical |
3 | Protected against spray up to 60° from vertical. |
4 | Protected against water spray from all directions. |
5 | Protection against low pressure water jets (all directions) |
6 | Protection against string water jets and waves. |
7 | Protected against temporary immersion. |
8 | Protected against prolonged effects of immersion under pressure. |
So for quick reference, these are defined below:
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