Republic of Korea (national Forensic Service Director Ministry of the Interior and Safety)

Republic of Korea (national Forensic Service Director Ministry of Public Administration and Security)

Republic of Korea(management: National Forensic Service Director, Ministry of Public Administration and Security)

Eun Ah Joo

Jin Pyo Kim

Nam Kyu Park

Young Il Seo

Jae Mo Goh

Sang Yoon Lee

Je Hyun Lee

Dong A Lim

Kyung Mi Kim

Byung Seon Moon

Ki Hwan Kim

Ho Yong Yie

Se Hyun Shin

Yong Jun Kim

Gang Won Byun

Eun Bi Lee

Young Ii Seo

Jae Hyeok Yi

A method of comparing and determining three-dimensional (3D) identity of a tool mark includes: obtaining a 3D image of a suspect tool and a tool mark; extracting a contact portion of the suspect tool contributed to formation of the tool mark from the 3D image of the suspect tool; determining a matching area by comparing a shape of the contact portionof the suspect toolwith a shape of the tool mark; and calculating a matching rate between the contact portion of the suspect tool and the tool mark.

Method and apparatus for comparing and determining three-dimensional identity of tool mark

A developed impact mark analysis apparatus includes: an image acquisition unit configured to obtain at least one first image by photographing impact marks that are developed, and to obtain a second image of impact marks at a crime scene that are developed from evidence at the crime scene; an outliner configured to outline the at least one first image to obtain at least one first outline image, and to outline the second image to obtain a second outline image; a database configured to store the first outline image corresponding to related tool characteristic information; a matching unit configured to search the database for the first outline image determined to be similar to the second outline image and match them with each other; a display unit; and a user input unit.

Apparatus and method of analyzing developed impact marks, and computer program for executing the method

A method of enhancing a footwear impression formed on a porous surface using a potassium ferrocyanide solution for footwear impression enhancement includes: forming a porous surface sample by leaving footwear impressions into an object having a porous surface; preparing a potassium ferrocyanide solution for footwear impression enhancement; and applying the potassium ferrocyanide solution for footwear impression enhancement to the porous surface sample.

Method of enhancing footwear impression on porous surfaces using potassium ferrocyanide solution for footwear impression enhancement

A footprint generator capable of applying a constant force includes: a base plate in which a target surface may be on an upper surface of the base plate; a shoe mounting member that is apart from the upper surface of the base plate and capable of mounting a shoe; a driving unit that is apart from the upper surface of the base plate and capable of moving the shoe mounting member up and down; and a force measuring unit configured to measure an impact force when the shoe mounting member descends and contacts the shoe with the target surface to generate a footprint on the target surface.

Footprint generator capable of applying constant force and footprint generation method using the same

A method of calculating a bleeding site and a trajectory of a bloodstain scattered by impact includes: obtaining, by an electronic device calculating the bleeding site and the trajectory of the bloodstain scattered by impact, captured image information; analyzing the obtained captured image information, by the electronic device, and calculating a collision angle and measuring a direction angle of the bloodstain scattered by impact; calculating, by the electronic device, a coordinate value of the bleeding site by using a linear trajectory method; calculating, by the electronic device, a trajectory of a drop of blood based on the calculated coordinate value of the bleeding site by using a parabolic trajectory method considering gravity and air resistance; and displaying and outputting, by the electronic device, a linear trajectory of the drop of blood and a parabolic trajectory considering gravity and air resistance of the drop of blood on a 3D space.

Electronic device, method, and computer program for calculating bleeding site and trajectory of bloodstain scattered by impact

A developed fingerprint level determination apparatus includes: a fingerprint image acquisition unit configured to obtain at least two or more developed fingerprint images according to a fingerprint development technique; and a ridge level determination unit configured to check respective ridge development level information of the obtained fingerprint images and compare the respective ridge development level information with each other.

Method and apparatus for determining the level of developed fingerprint

A method of generating artificial latent fingerprints for latent fingerprint development experiments includes: printing an artificially created fingerprint shape on paper for application to a target surface; thermally transferring the fingerprint shape printed on the paper to an etching plate by applying a certain range of heat and pressure to the paper on which the fingerprint shape is printed; forming a three-dimensional fingerprint shape on the etching plate by performing an etching process according to the fingerprint shape transferred to the etching plate; patterning the three-dimensional fingerprint shape formed on the etching plate with a molding member; and forming a latent fingerprint on the target surface using an artificial fingerprint solution from the three-dimensional fingerprint shape formed by patterning with the molding member.

Method of generating artificial latent fingerprints for latent fingerprint development experiments

An apparatus for shooting scattered blood marks at right angles includes: a first body including a lens coupling portion formed to couple a camera lens and a housing portion having a hollow inside and forming an opening at one end thereof; and a second body including a surface contact portion formed to contact a target surface including scattered blood marks and an insertion portion extending from the surface contact portion and inserted into the housing portion to adjust a distance between the scattered blood marks and the camera lens.

Apparatus and method of shooting scattered blood marks at right angles

Artificial blood for a bloodstain pattern analysis includes water, an amino acid solution, bovine serum albumin, hemoglobin from bovine blood, potassium ferricyanide, sodium hyaluronate, sodium chloride, and tar color.

Artificial blood for bloodstain pattern analysis

A fingerprint generator capable of applying a constant force includes: a base plate in which a target surface may be on an upper surface of the base plate; a fingerprint mounting unit that is apart from the upper surface of the base plate and capable of mounting a fingerprint molding body having a fingerprint shape thereon on a lower portion of the fingerprint mounting unit; a driving unit that is apart from the upper surface of the base plate and capable of moving the fingerprint mounting unit up and down; and a force measuring unit configured to measure an impact force when the fingerprint mounting unit descends and contacts the fingerprint shape with the target surface to generate a fingerprint on the target surface.

Fingerprint generator capable of applying constant force and fingerprint generation method using the same

An impact blood splatters generation experimental apparatus capable of measuring an applied force includes: a hammer including a rod-shaped body portion, a head portion formed at one end of the body portion, and a striking portion formed on one side of the head portion; a housing receiving a certain amount of blood thereon and including a striking surface on which the striking portion may strike; a tensile force gauge attached to an outer surface of the housing; an elastic member having one end connected to the body portion and the other end connected to the tensile force gauge; and a display unit displaying a force applied to the hammer, the force being measured by the tensile force gauge, when a user lifts the hammer to strike the striking surface.

Impact blood splatters generation experimental apparatus capable of measuring applied force and method of generating impact blood splatters using the same

A temperature and humidity chamber type apparatus for taking potential impact marks according to an embodiment includes: a specimen treated with an amino acid reaction reagent to react with potential impact marks to take the potential impact marks; a chamber in which a receiving space for receiving the specimen is secured; a door for opening and closing the chamber; a supporter formed in the receiving space to receive the specimen; an adjuster for adjusting temperature and humidity in the chamber within a set application time range to take the potential impact marks; a display unit attached to one side of the outside of the chamber to display an operation state in the chamber; a power source; a controller for controlling setting of temperature, humidity, and an application time in the chamber; and an input unit in which the controller operates according to a user's input.

Temperature and humidity chamber type apparatus for taking potential impact marks and method using the same

A method of determining footprint identity using a dimension reduction algorithm according to an embodiment includes: pre-processing to process three-dimensional (3D) image data about footprints of a first person and a second person and convert the 3D image data into one-dimensional (1D) data about the footprints of the first person and the second person; calculating a distribution of cross-correlation coefficients between two pieces of 1D data about footprints of the first person (SC: same footwear correlation) and a distribution of cross-correlation coefficients between the 1D data about the footprints of the first person and the second person (DC: difference footwear correlation); and calculating a likelihood ratio based on the SC and the DC to determine the degree of correspondence between the footprints of the first person and the second person.

Method and apparatus for determining footprint identity using dimension reduction algorithm

Provided is a blood spatter simulation head model including a housing having the shape of a human head; a reservoir inside the housing and capable of storing blood; an injection tube connected to the reservoir and extending to a lower portion of the housing, the injection tube including an injection opening through which blood is injected; and a weight unit in a lower portion of the housing and supporting the housing.

Blood spatter simulation head model and blood spatter simulation system including the same

A tool strip mark generator capable of measuring applied force includes: a bottom surface on which at least a portion of a target surface made of a material capable of generating a tool strip mark, which is a tool-scraped stripe, is formed; a rotating member configured to be rotatable in a state of being spaced apart from the bottom surface; a moving member movable on the bottom surface by laterally coupling the rotating member to a coupling portion; a force sensor attached to one side of an outer peripheral surface of the rotating member and sensing force which is applied when a tool strip mark is generated on the target surface by inserting the tool; a measurer configured to measure an output signal of the force sensor and calculate information about the applied force; and a display configured to display information about the applied force calculated by the measurer.

Growing community of inventors

Yongin-si, South Korea

Eun Ah Joo