"You lied" a momentary expression testifies to you

<Anchor> You

've probably seen police use a lie detector in a movie or drama.

After attaching multiple sensors to a person's body, when the person responds, it analyzes the pulse, breathing, and changes in skin to determine whether it is a lie or not.

However, it costs quite a bit and the method is complicated.

So, the police are examining the use of a technique to determine whether or not a lie is a lie with only facial images.

First of all, reporter Jang Hoon-kyung will explain how this is possible.

<Reporter> This

is the lie detection room of the Seoul Metropolitan Police Agency.

Although the ability of evidence is not recognized at trial, more than 1,500 tests are carried out each year in the Seoul Police alone to secure circumstantial evidence.

The accuracy exceeds 90% by measuring various variables including skin and peripheral nerve responses, chest and abdominal breathing, and cardiovascular conditions.

The reporter secretly wrote down 5 of the three numbers, 3, 4, and 5, kept it and experimented with a lie detector.

[Lee Jae-seok/Seoul Police Agency Lie Detection Team Leader: Did you write it 5 times a while ago?

(No.) Did you write it 3 times a while ago?

(No.)]

I answered'No' to all the questions, but the inspector answered correctly as soon as the measurement was completed.

[You are talking?

How many times did you write it?

Am I talking about it?

(Did you know?) Didn't you write it 5 times?

(Miraculous.)]

When you answered No. 5, there was a large current response through the skin, which revealed that it was a lie.

This time, I did an experiment to detect lies with nothing attached to the body and only by taking a facial image.

[Wed, Thurs, or Friday, you used one of them, right?] What I

secretly

wrote down is

Friday, and only facial movements are used to determine lies.

[Video for Lie Detection Analysis: Did you write Thursday a while ago?

(No.) Did you write Friday a while ago?

(No.)] It

analyzes energy metabolism, sensitivity, excitement, etc. with only minute movements, and I quickly guess that I wrote down Friday.

[Choi Jin tube / image analysis business owner: sensitivity degrees (normal state) and listed above the dotted excitement also because most high during the three us and we will judge on Friday to false signs -

Police conventional polygraph and image analysis lies We look forward to using the detectors together to help you collect circumstantial evidence or verify the authenticity of your statements.

[Lee Jae-seok/Seoul Police Agency Lie Detection Team Leader: I think it is very useful in terms of anxiety or discomfort in contact.

Compared with the existing (lie detector), the (match rate) is over 90%...

.] The

police are also reviewing plans to expand operation so that video lie detection can be used for investigation at front line police stations.

(Video coverage: Gong Jin-gu, video editing: Park Jin-hoon)

---

<Anchor>

Reporter Jang Hoon-kyung, who participated in the experiment you just saw, is here.

[Reporter Jang Hoon-kyung: Yes, that's right.

The Supreme Court does not recognize the ability of evidence, so it is now used as a reference material for

.]

[Reporter Hoon-Kyeong Jang: Yes, the technology is already being used in a pilot to analyze CCTV, especially in the security field, and I will explain it while watching the video.

In April 2016, I entered CCTV into the video analysis program at Gwanak Police Station in Seoul, and unlike other people displayed in green, that woman, a woman in her 30s with a shopping bag, is displayed in red.

As a result of the analysis of fine movements, it means that you are sensitive, excited, and highly aggressive.

Actually, this woman sprinkled sulfuric acid prepared in advance on four police officers, saying that she would not listen to her.]

[Reporter Hoonkyung Jang: Of course, this video analysis technology should not infringe or limit the physical freedom of citizens.

However, in places like airports and ports that always need to be prepared for terrorism, it would be good to review them in terms of supplementing the existing response posture, but foreign countries have actually introduced and used this technology, and I will explain it while watching the video together.

It is a CCTV analysis program installed at Guangzhou Airport, China.

It was April 2017, and unlike other people, it was marked in red, but the degree of suspicion was high at around 90.

In fact, the man was caught trying to enter the country illegally with 100,000 USD.

Also, this video is from the Malaysian port customs.

The male's suspicion of passing through the security checkpoint exceeds 64 and turns red.

In fact, it was a man who made and used a counterfeit passport such as Korea.

It is not actually used in Korea because of concerns about human rights violations, but it would be good to consider using it very limitedly in such places as in the crime zone.]