Ordinary people are worried about their privacy being violated, being filmed and shared… …
How to find the hidden micro surveillance cameras, hope to provide you with some help.
Principle & Structure
First of all, we should understand the structure and functional characteristics of this kind of hidden camera, so as to know ourselves and know the enemy, so as to find them better and quickly. Similar to ordinary security cameras, the main structure and function of the hidden camera are shown below:
We can see several key parts of this type of camera: Lens, infrared light, power supply, Wi-Fi (or video cable) transmission, TF card storage. No matter how small the hidden miniature camera is made, these key parts are indispensable (one or several). We can find and distinguish the camera and find them through these key parts. The specific method is analyzed below.
Lens
The camera needs light to image, so no matter how hidden, the camera lens always leaks out. Considering the need for concealment, the smaller the lens, the better. The lens suitable for hidden cameras is mainly like this:
After installation into a finished product, the exposed part is basically the same as the camera on our mobile phone. Because the lens is a convex lens, with strong light irradiation can see the obvious light reflection, refraction. Some high quality of the lens lens will be coated, but also the diffusion of light, showing a colorful effect.
Therefore, if you suspect that a camera is installed somewhere, you can observe first to see if the exposed part is like a lens, and you can also use a flashlight to illuminate the suspected lens part to see if there is light reflection, or diffusion, light spots of various colors. Some tools on the market use this method to distinguish the lens, so as to find out the hidden camera.
Infrared Light (IR Light)
When the light is dark or there is no light at all, the camera needs to fill the light to shoot. Relatively clear the picture. Because of the optical characteristics of the image sensor, the wavelengths of infrared lamps that can generally be used to fill the light are 850nm and 940nm. In the dark environment, the human eye can easily find the 850nm infrared lamp, 940nm infrared lamp concealment is stronger, the human eye is more difficult to find. We can use the mobile phone camera to find the 940nm infrared light in a dark environment (such as closing the curtains and turning off the lights). (Turn off the fill light of the mobile phone camera, the mobile phone camera and the concealed camera use the same type of image sensor).
To a new environment, such as a hotel, we can draw the curtains, turn off all the lights, through the naked eye and with the help of mobile phone cameras to find potential camera fill light, so as to find hidden cameras.
In addition, it should be noted that the infrared supplementary light is not standard for the camera, and the infrared light cannot be found, which does not mean that there must be no camera here.
Power
The camera needs power to work. We can find the hidden camera through the power line. The power supply voltage required for camera work is generally DC12V,DC5V,DC3V, etc. This means that in addition to the regular power supply line, some cameras can be powered by USB, or by charging treasure, 18650 battery or polymer battery commonly used in mobile phones. Of course, the capacity of the battery is limited after all, and it is necessary to replace the battery frequently or there is a plan to charge the battery.
It is more common to use an additional transformer to power the camera separately. When you come to a strange environment and worry about being photographed secretly, you can disconnect the power supply of all electrical equipment, or disconnect the main power switch. The camera has no power supply, so it can’t work naturally. It’s rough and simple, and it’s over!
Video Cable Transmission
If you use a traditional analog camera, you need to use a video cable to transfer the image to a back-end video storage device (video recorder, DVR) to record and store the video. Like the power cord, we can find the corresponding camera and video storage device through the video cable. The appearance of the video line is the same as that of the cable TV signal line, and the appearance color is mostly black.
Wi-Fi Transmission
In addition to the wired video line transmission, the hidden micro camera is more of a Wi-Fi wireless signal transmission video. This kind of camera can be connected to the nearby Wi-Fi router through the Wi-Fi, thus connecting to the Internet. It can be remotely accessed by the mobile phone App at any time, and can monitor or retrieve the historical videos stored in the TF card in real time. Cloud storage can also be implemented to store the video in the cloud so that the video data can be retrieved at any time.
In this way, because this kind of camera needs to use Wi-Fi signals, we can judge whether there is a hidden camera by looking at the access device information in the Wi-Fi router. Of course, this method cannot help find out the specific location of the camera.
The premise of using this method is that we need to be able to log in to the Wi-Fi router and check the access of the equipment in the router. At present, there is an APP on the market that uses this method to detect hidden cameras, which can display abnormal devices connected to the same Wi-Fi more intuitively to help us judge.
SD Card Storage
The purpose of candid shooting is to record video. This kind of camera mostly uses TF card for local storage, or transmits the camera to the back end for storage in a Wired way (using hard disk or TF card), which means that the person who installs this equipment will, within a period of time probably will come back to retrieve the fully stored TF card (may also need to come back to replace the battery for the camera). For this possibility and dangerous personnel, managers in places with high incidence of being secretly photographed, such as hotels and apartments, should be vigilant, pay attention to screening, and put an end to hidden dangers.
Heat
The camera will heat up when it is working, and the temperature is relatively high, so it is suspected that the place where the camera is installed can be detected by thermal imaging equipment to determine whether the temperature is abnormal here. Of course, the general electrical appliances will also have a heating part, be careful not to misjudge.
Type
In order to let everyone better find, find and prevent possible hidden miniature cameras, search and sort out the common miniature cameras and common hidden locations.
Possible Hidden Locations
Ceiling (good View)
Lamp holder, power panel, smoke detector, fire sprinkler head, etc.
Books on shelves (hollowed out), folders
behind the speaker net of TV and stereo
Lower edge of table and chair
Wall-mounted electrical appliances such as clocks, air conditioners, ventilation fans
Alarm clock, decorations, etc. on the bedside table