Bullet-Proof Mesh function: impact-resisting, anti-theft, bullet-proof and mosquito-preventing
Bullet-proof mesh: Transparent without any sense of vertigo, it is like a layer of transparent colored glass when looked from inside to the outside of the room, and hazy and blurred from outside to the inside of the room
Bullet-proof mesh features:
1. smooth surface, standard meshes, consistently-bent latitude and longitude.
2. being as hard as iron plate
3. the preferred product for anti-theft, bullet-proof, and home office security protection
Bullet-proof mesh specification:
material: stainless steel 304, 316, 316L Wire
Common size: 10mesh*1.0mm, 11mesh*0.9mm, 11mesh*0.55mm 14mesh*0.5mm
size: 75mm*1200/1500/2000/2400mm, 910mm*1200/1500/2000/2400mm, 1200mm*1500/2000/2400mm
Color: Black, Grey, White, Yellow, Natual color etc.
Market area: Australia, America, Europe
Bullet-proof mesh Stainless Steel Bullet-Proof Mesh,Security Screen Mesh,Safety Glass Wire Mesh,Window Screen Bulletproof Mesh Anping Deming Metal Net Co.,Ltd , https://www.wovenfence.nl
The signal-to-noise ratio of the image should be equal to the ratio of the power spectrum of the signal to the noise, but usually the power spectrum is difficult to calculate. There is a way to approximately estimate the signal-to-noise ratio of the image, that is, the ratio of the variance of the signal to the noise. First calculate the local variance of all the pixels in the image, consider the maximum value of the local variance as the signal variance, the minimum value as the noise variance, find their ratios, convert them to dB, and finally correct them with empirical formulas. For specific parameters, please refer to Deconvolution and signal recovery s/n is called signal-to-noise ratio.Because the ratio of S and N is too large in actual use, it often takes its decibel number (db). The relationship between decibel and signal to noise ratio is: db=10lgs/n .
The signal-to-noise ratio of the image of the general surveillance camera is 50dB. The signal-to-noise ratio is the ratio of the signal voltage to the noise voltage and is usually expressed by the symbol s/n. Since the signal voltage is generally much higher than the noise voltage, the ratio is very large, and the unit of SNR is expressed by db. The signal-to-noise ratio given by the general camera is the value when the AGC (automatic gain control) is turned off, because when the agc is turned on, the small signal is boosted, so that the noise level is also increased accordingly. The typical signal-to-noise ratio is 45~55db. If it is 50db, there is a little noise in the image, but the image quality is good. If it is 60db, the image quality is good and no noise occurs.
What is the camera signal to noise ratio
Signal-to-noise ratio (SNR), also known as signal to noise ratio (SNR), is also known as signal to noise ratio. Reflect the anti-jamming ability of the camera imaging, the reaction is in the picture quality is whether the picture is clean and no noise; narrow sense is the ratio of the power of the output signal of the amplifier and the noise power output at the same time, often expressed in decibels.