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The cameras don't automatically recognize all faces yet, but the ability to selectively analyze faces on specific recordings is already available. If necessary, you can use hardware (if you have a high-quality recording) to select an identifiable face from the crowd when shooting a mass event where there are hundreds of faces in the frame. But the hardware power and high-quality equipment for full identification of everything "on the fly" is still not enough, and many cameras are not able to give the desired picture.
A silicone face mask does not provide protection from identification when an expert takes a responsible approach to performing his task.
Professional equipment
The Dallmeier system.
It costs very little where.
Standard security cameras
They stand in the metro, at gas stations, and so on.
Simplest cameras
They stand on entrances and similar places.
ATM cameras
They stand on ATMs.
Who can study video recordings and how
Cop - in most cases, the first law enforcement officer finds video recordings, his interest lies in determining" by eye "the main signs and distinguishing features for searching through the database of previously convicted persons and for performing a search "on the ground". They won't go into too much detail about anything, but will simply view the recording, make a copy of it, and print out the most successful shots. The recording is then handed over to the investigator.
Having received a recording from the operator or from other sources, the investigator studies it and forms it out in a procedural way: attaches it as evidence, reviews and enters the main noteworthy aspects in the inspection report. Now there is a verbal description of the events and persons from the video on paper. If everything is clear on the video, then the recording remains attached to the case file with all the procedural documents (including the protocol of face identification by one of the participants in the process).
On behalf of the investigator, the expert examines the video with the use of special knowledge, can do a lot, but not a wizard.
What external signs most help identify a person
Complex signs of appearance. Well-deserved first place in terms of the number of identifications and ease of perception: height, build, gender, age, etc. In one way or another, they appear on almost all the videos.
Traffic features. Here, such signs as gait, repetitive movements, involuntary and arbitrary gestures and other features of movements are comfortably located - these signs are present on almost all recordings of wide-view cameras (street, metro, etc.) because there is coverage of a long distance when a person is in the camera's field of view.
Facial features. Yes, they are in the third of the three places in terms of the frequency of appearing on videos. They are often found on limited-view cameras (for example, ATM cameras), where the main identifiable features are the cut of the eyes, mouth, special signs (moles, scars, etc.), mouth width, facial expressions, ear shape, hair (their presence or absence, color), etc. Only this type of identification can be protected by a mask, balaclava, scarf, or glasses.
Automatic face recognition in video recordings
The features used by the algorithm use the summation of pixels from rectangular regions. The features themselves are somewhat similar to Haar features, which were also previously used to search for objects in images. However, the features used by Viola and Jones contain more than one rectangular area and are somewhat more complex. The illustration on the right shows 4 different types of attributes. The value of each feature is calculated as the sum of pixels in white rectangles, from which the sum of pixels in black areas is subtracted.
Project of the Russian company VOCORD.
A face recognition system based on the specified algorithm.
It may soon be integrated with the "Portrait-Search" system of the Ministry of Internal Affairs, as today it is the only one that meets the unexpectedly similar GOST ISO/IEC19794-5-2006 standard.
It can recognize faces in automatic mode and compare them with the card file for matches (in search mode). It can passively index video recordings with marking which face was detected on which frame for subsequent convenient search.
When used with the recommended parameters of street surveillance equipment, recognition accuracy reaches 30% in the stream and 50% when specifically searching for a specific face (the second option uses more power per face and allows you to achieve better results). According to official documents, automatic recognition rates are about 95%, but this is nonsense.
Face identification in "manual" mode when trying to hide the face + unmasking features
Without considering the cases of open T-shirts with tattoos on the shoulders and other nonsense: our movie hero was captured on a good clear camera at the moment when he was in outerwear that hides most of his body and there is something on his head from the means of disguise.
Identification of a person when viewing video camera recordings (we do not take into account dynamics - gait, etc.) occurs according to the following points:
Wearing a full head mask or tight stockings (on the head)
Height and anthropological data - some things can be hidden by clothing, but height can hardly be changed.
The shape of the skull (oblong, spherical, etc.).
Neck (length, thickness, presence of marks and scars) - protects a high collar or turtleneck.
The shape and color of the eyes and their presence, the position of the eyelids, and other special signs are corrected with glasses.
Hands (marks, tattoos, scars - protect quite appropriate gloves.
Eyebrows (location, presence, monobrow).
Mouth, lips and teeth - do not wear a mask with a slit for the mouth, unless it will only interfere with intimate conversations with the arrived PSC and the police.
The mask is only applied to the face or part of the face.
The above is a plus:
The shape of the auricle and its parts - a hat with earflaps to help.
The presence or absence of hair on the head (including facial hair at some length), their color and shape.
All these signs will disappear when using a full-head mask, so the ideas of hiding the above are just pathetic crutches instead of the normal means of hiding the face.
Wearing a hat or baseball cap
Listed above (minus the amount of hair on your head) plus:
General outline of the face.
Portrait of a face with all the details.
Identification complication
Since you can never be sure that there are no cameras or they can't see anything, you should always think about protecting your appearance.
Quick tips
We completely hide the face (balaclava, mask, glasses, hood-all together or emphasize the necessary), wear a headdress (so that the sun does not bake the head).
We put on clothes that are not typical for us (we do not take our favorite school backpack to the campaign).
We change our gait by changing the insole of one of our shoes or putting on an orthopedic bandage for the lower leg or knee with minimal restriction of movement, but with a change in gait.
We put on things that are spacious and hide the figure as much as possible.
Under the promotion, we select the appropriate attributes that will be appropriate for the season, environment, needs, and so on.
Offtop
Paint over the camera with a spray can
+ Easily and quickly implemented
+ Requires minimal expenses ($ 20)
+ Guarantees the result
- Not suitable for high-hanging cameras
- There is a real risk of getting caught in the last frames when painting over
Paintball marker
+ Perfectly paints over any camera with sufficient accuracy
+ Publicly Available
+/- Costs from $ 70
- Standard paint balls should be refilled with enamel or other paint
- Marker sizes are close to small arms (corrected by purchasing a paintball gun)
Shoot the camera
+ Guarantee of the result in case of a hit
- Noisy
- Extra traces during damage assessment
- Need a weapon
Physical wire cutting
+ Guarantee of the result (with the correct choice of wires)
- You need access to the wiring and an understanding of what goes where
Flashing the camera with an IR light
+ Almost imperceptibly for others with proper skill (as far as you can imperceptibly shine a "non-luminous" flashlight through the peephole of a video camera
- It is necessary to constantly shine the light on the camera
- It does not affect all cameras and it is difficult to predict it
- We need powerful IR diodes and shamanism with the assembly of the device
Unpromising methods
Burning out the matrix with a powerful laser-it doesn't work even when working from a tripod and hitting the lens for a long time (I didn't take an industrial laser, so I just used the strongest laser pointer available).
Shocker disconnection-does not work for any contact, except for contact with exposed residential wiring (and if you have access to it, just cut it).
A silicone face mask does not provide protection from identification when an expert takes a responsible approach to performing his task.
Professional equipment
The Dallmeier system.
It costs very little where.
Standard security cameras
They stand in the metro, at gas stations, and so on.
Simplest cameras
They stand on entrances and similar places.
ATM cameras
They stand on ATMs.
Who can study video recordings and how
Cop - in most cases, the first law enforcement officer finds video recordings, his interest lies in determining" by eye "the main signs and distinguishing features for searching through the database of previously convicted persons and for performing a search "on the ground". They won't go into too much detail about anything, but will simply view the recording, make a copy of it, and print out the most successful shots. The recording is then handed over to the investigator.
Having received a recording from the operator or from other sources, the investigator studies it and forms it out in a procedural way: attaches it as evidence, reviews and enters the main noteworthy aspects in the inspection report. Now there is a verbal description of the events and persons from the video on paper. If everything is clear on the video, then the recording remains attached to the case file with all the procedural documents (including the protocol of face identification by one of the participants in the process).
On behalf of the investigator, the expert examines the video with the use of special knowledge, can do a lot, but not a wizard.
What external signs most help identify a person
Complex signs of appearance. Well-deserved first place in terms of the number of identifications and ease of perception: height, build, gender, age, etc. In one way or another, they appear on almost all the videos.
Traffic features. Here, such signs as gait, repetitive movements, involuntary and arbitrary gestures and other features of movements are comfortably located - these signs are present on almost all recordings of wide-view cameras (street, metro, etc.) because there is coverage of a long distance when a person is in the camera's field of view.
Facial features. Yes, they are in the third of the three places in terms of the frequency of appearing on videos. They are often found on limited-view cameras (for example, ATM cameras), where the main identifiable features are the cut of the eyes, mouth, special signs (moles, scars, etc.), mouth width, facial expressions, ear shape, hair (their presence or absence, color), etc. Only this type of identification can be protected by a mask, balaclava, scarf, or glasses.
Automatic face recognition in video recordings
The features used by the algorithm use the summation of pixels from rectangular regions. The features themselves are somewhat similar to Haar features, which were also previously used to search for objects in images. However, the features used by Viola and Jones contain more than one rectangular area and are somewhat more complex. The illustration on the right shows 4 different types of attributes. The value of each feature is calculated as the sum of pixels in white rectangles, from which the sum of pixels in black areas is subtracted.
Project of the Russian company VOCORD.
A face recognition system based on the specified algorithm.
It may soon be integrated with the "Portrait-Search" system of the Ministry of Internal Affairs, as today it is the only one that meets the unexpectedly similar GOST ISO/IEC19794-5-2006 standard.
It can recognize faces in automatic mode and compare them with the card file for matches (in search mode). It can passively index video recordings with marking which face was detected on which frame for subsequent convenient search.
When used with the recommended parameters of street surveillance equipment, recognition accuracy reaches 30% in the stream and 50% when specifically searching for a specific face (the second option uses more power per face and allows you to achieve better results). According to official documents, automatic recognition rates are about 95%, but this is nonsense.
Face identification in "manual" mode when trying to hide the face + unmasking features
Without considering the cases of open T-shirts with tattoos on the shoulders and other nonsense: our movie hero was captured on a good clear camera at the moment when he was in outerwear that hides most of his body and there is something on his head from the means of disguise.
Identification of a person when viewing video camera recordings (we do not take into account dynamics - gait, etc.) occurs according to the following points:
Wearing a full head mask or tight stockings (on the head)
Height and anthropological data - some things can be hidden by clothing, but height can hardly be changed.
The shape of the skull (oblong, spherical, etc.).
Neck (length, thickness, presence of marks and scars) - protects a high collar or turtleneck.
The shape and color of the eyes and their presence, the position of the eyelids, and other special signs are corrected with glasses.
Hands (marks, tattoos, scars - protect quite appropriate gloves.
Eyebrows (location, presence, monobrow).
Mouth, lips and teeth - do not wear a mask with a slit for the mouth, unless it will only interfere with intimate conversations with the arrived PSC and the police.
The mask is only applied to the face or part of the face.
The above is a plus:
The shape of the auricle and its parts - a hat with earflaps to help.
The presence or absence of hair on the head (including facial hair at some length), their color and shape.
All these signs will disappear when using a full-head mask, so the ideas of hiding the above are just pathetic crutches instead of the normal means of hiding the face.
Wearing a hat or baseball cap
Listed above (minus the amount of hair on your head) plus:
General outline of the face.
Portrait of a face with all the details.
Identification complication
Since you can never be sure that there are no cameras or they can't see anything, you should always think about protecting your appearance.
Quick tips
We completely hide the face (balaclava, mask, glasses, hood-all together or emphasize the necessary), wear a headdress (so that the sun does not bake the head).
We put on clothes that are not typical for us (we do not take our favorite school backpack to the campaign).
We change our gait by changing the insole of one of our shoes or putting on an orthopedic bandage for the lower leg or knee with minimal restriction of movement, but with a change in gait.
We put on things that are spacious and hide the figure as much as possible.
Under the promotion, we select the appropriate attributes that will be appropriate for the season, environment, needs, and so on.
Offtop
Paint over the camera with a spray can
+ Easily and quickly implemented
+ Requires minimal expenses ($ 20)
+ Guarantees the result
- Not suitable for high-hanging cameras
- There is a real risk of getting caught in the last frames when painting over
Paintball marker
+ Perfectly paints over any camera with sufficient accuracy
+ Publicly Available
+/- Costs from $ 70
- Standard paint balls should be refilled with enamel or other paint
- Marker sizes are close to small arms (corrected by purchasing a paintball gun)
Shoot the camera
+ Guarantee of the result in case of a hit
- Noisy
- Extra traces during damage assessment
- Need a weapon
Physical wire cutting
+ Guarantee of the result (with the correct choice of wires)
- You need access to the wiring and an understanding of what goes where
Flashing the camera with an IR light
+ Almost imperceptibly for others with proper skill (as far as you can imperceptibly shine a "non-luminous" flashlight through the peephole of a video camera
- It is necessary to constantly shine the light on the camera
- It does not affect all cameras and it is difficult to predict it
- We need powerful IR diodes and shamanism with the assembly of the device
Unpromising methods
Burning out the matrix with a powerful laser-it doesn't work even when working from a tripod and hitting the lens for a long time (I didn't take an industrial laser, so I just used the strongest laser pointer available).
Shocker disconnection-does not work for any contact, except for contact with exposed residential wiring (and if you have access to it, just cut it).
