Abrégé

There are described methods and system for determining a similarity or distance measure between a first ballistic specimen and a second ballistic specimen. The method comprises acquiring topographic data from the first ballistic specimen and the second ballistic specimen of at least one region of interest; computing from the topographic data at least one similarity score s for the first ballistic specimen and the second ballistic specimen; determining a non-match probability measure of the similarity score for at least one parameter characterizing a macroscopic and/or microscopic feature of the topographic data, the non-match probability measure associating the first ballistic specimen and the second ballistic specimen to a different source; and correcting the similarity score by determining a corrected similarity score that yields a same value of the non-match probability measure as the similarity score for a reference value of the at least one parameter.

Classes IPC  ?

• F42B 35/00 - Test ou vérification des munitions
• G01B 11/30 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la rugosité ou l'irrégularité des surfaces

Abrégé

A bullet compressing device for creating marks imparted by a barrel of a gun on a bullet, has: a first member; a second member spaced from the first member by a gap, a dimension of the gap selected to correspond to at least a length of the bullet, the first and second members slidingly receivable within the barrel of the gun; a biasing member in engagement with the first and second members, the biasing member having a compressed configuration in which the first and second members are biased toward one another thereby decreasing the dimension of the gap, one of the first and second members engageable by an actuator, the first and second members and the bullet received therebetween movable relative to the barrel thereby imparting marks on the bullet by the barrel upon actuation of the actuator.

Classes IPC  ?

• F42B 35/00 - Test ou vérification des munitions
• F42B 5/02 - Cartouches, c. à d. projectile et douille avec charge propulsive formant un tout

Abrégé

The present disclosure provides devices, systems, and methods for aligning and securing a projectile. A base defining a receptacle for receiving the projectile comprises a self-centering mechanism for aligning a longitudinal axis of the projectile with a reference axis. An upstanding support projects upwardly from the base. A head member extends from the upstanding support, disposed vertically above the base, and has defined therein an opening aligned with the reference axis. A rod member is slidably mounted in the opening, such that a longitudinal axis of the rod member is aligned with the reference axis. A mounting adapter has a first end configured for adhesively retaining the projectile and a second end defining a coupling mechanism selectively mateable with a distal end of the rod member and with an inspection device used for performing inspection of the projectile.

Classes IPC  ?

• F42B 35/00 - Test ou vérification des munitions
• G01N 21/88 - Recherche de la présence de criques, de défauts ou de souillures
• G01N 21/952 - Inspection de la surface extérieure de corps cylindriques ou de fils

Abrégé

Detection of surface irregularities in coins. Three-dimensional topographic data of at least one surface of a coin, having at least one feature, is acquired and used to determine characteristics of the coin features, based on vector components of normal vectors at various points on the surface of the coin. The feature characteristics are then compared to reference feature characteristics. Based on this comparison, an irregularity indication is provided if differences between the feature characteristics and the reference characteristics are found.

Classes IPC  ?

• G06T 7/00 - Analyse d'image
• G06T 7/586 - Récupération de la profondeur ou de la forme à partir de plusieurs images à partir de plusieurs sources de lumière, p.ex. stéréophotométrie
• G01B 21/20 - Dispositions pour la mesure ou leurs détails, où la technique de mesure n'est pas couverte par les autres groupes de la présente sous-classe, est non spécifiée ou est non significative pour mesurer des contours ou des courbes, p.ex. pour déterminer un profil
• G07D 5/00 - Vérification spécialement adaptée à la détermination de l'identité ou de l'authenticité des pièces de monnaie, p.ex. pour séparer les pièces qui ne peuvent pas être acceptées ou qui sont en monnaie étrangère
• G07D 5/10 - Vérification de la tranche, p.ex. des cannelures de la tranche

Abrégé

There is described a method and 3D image acquisition system for addressing the specular nature of metallic surfaces in general, and ballistic pieces of evidence in particular, using photometric stereo by identifying and solving a plurality of sets of non-linear equations comprising a diffusive term and a specular term to determine a surface normal vector field N(x,y), and using N(x,y) to determine a 3D topography Z(x,y).

Classes IPC  ?

• H04N 7/18 - Systèmes de télévision en circuit fermé [CCTV], c. à d. systèmes dans lesquels le signal vidéo n'est pas diffusé
• G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
• G06T 7/00 - Analyse d'image

Abrégé

There is provided a method for analyzing at least one object under a first microscope and a second microscope concurrently by linking the two microscopes together. Movement of one microscope will result in movement of the other. This is done by computing a transformation to link a first coordinate system and a second coordinate system and generating guidance data when one of the two microscopes is displaced, the guidance data corresponding to a set of operations to be applied to the other microscope to follow movement of the microscope that is displaced.

Classes IPC  ?

• G06K 9/60 - Combinaison de l'obtention de l'image et des fonctions de prétraitement
• F42B 35/00 - Test ou vérification des munitions
• G02B 21/18 - Aménagements avec plus d'un parcours de lumière, p.ex. pour comparer deux échantillons
• G02B 21/36 - Microscopes aménagés pour la photographie ou la projection
• G06T 7/00 - Analyse d'image
• G01N 15/14 - Recherche par des moyens électro-optiques
• G02B 21/00 - Microscopes

Abrégé

There is provided a method for generating a 3D representation of an object, comprising: acquiring 3D topographic data representative of at least one portion of the object having a macroscopic form and microscopic features; separating the 3D topographic data into microscopic data representative of the microscopic features and macroscopic data representative of the macroscopic form; independently scaling one of the microscopic data and the macroscopic data in order to enhance the microscopic features with respect to the macroscopic form, thereby obtaining scaled topographic data; and generating a 3D image using the scaled topographic data, thereby obtaining a modified representation having enhanced microscopic features for the at least one portion of the object.

Classes IPC  ?

• G06T 19/00 - Transformation de modèles ou d'images tridimensionnels [3D] pour infographie
• G06T 3/00 - Transformation géométrique de l'image dans le plan de l'image
• G06T 5/50 - Amélioration ou restauration d'image en utilisant plusieurs images, p.ex. moyenne, soustraction

Abrégé

There is described a method for positioning an object on an optical sensor system for acquiring a surface thereof, the sensor system having a set of motors for rotating the object around a motor axis perpendicular to an optical axis of the sensor system and for translating the object in X, Y and Z directions, the method comprising: (a) acquiring a relief map of an area in a field of view of the sensor system; (b) computing a normal representative of a topography of the relief map of the area; (c) determining an angle difference between the normal and the optical axis of the sensor system; (d) comparing the angle difference to a threshold angle to determine if the surface of the area is perpendicular to the sensor axis; (e) if the angle difference is greater than a threshold angle, rotating the object to obtain a new difference angle less than the threshold angle; and (f) translating the object to reposition the area in the field of view after the rotating has displaced the area.

Classes IPC  ?

• G01B 11/30 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la rugosité ou l'irrégularité des surfaces
• G01B 11/26 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour tester l'alignement des axes
• G01B 11/14 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la distance ou la marge entre des objets ou des ouvertures espacés
• G01C 1/00 - Mesure des angles
• G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales

Abrégé

A method and an apparatus to obtain a surface mapping of a ballistic piece of evidence (BPOE) under examination, such as a bullet or a spent cartridge case, that can be used thereafter as a 3D signature for identifying purpose during ballistic test comparison. The method comprises providing a measurement unit adapted to acquire a relief map of the surface of the BPOE and acquiring with the measurement unit the relief map of the surface to thereby obtain the mapping of the surface of the BPOE. Preferably, the measurement unit of the present invention comprises a confocal sensor such as confocal microscope. Also, the present invention includes acquiring the relief map of the bullet surface or of the cartridge case surface by acquiring and assembling a mosaic of regional reliefs that are partly overlapping with their surroundings regional reliefs.

Classes IPC  ?

• G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales

Abrégé

A method and apparatus for an automated system to extract a high quality signature from an image having areas not relevant for specific identification purposes which can lead to misleading image signatures, the method comprising: identifying at least one region of interest within the image by determining local orientation information at each pixel position in the image, the at least one region of interest comprising elements useful for the specific identification purposes; creating and applying a mask for the image wherein only the at least one region of interest is exposed; extracting a signature for the image taking into account the at least one region of interest exposed by the mask.

Classes IPC  ?

• G06K 9/46 - Extraction d'éléments ou de caractéristiques de l'image

Abrégé

A firearm identification kit is provided including a data storage media bearing ballistics information and other indicia that may be useful in matching a fired spent cartridge case or bullet to the firearm that fired it.

Classes IPC  ?

• G06F 17/00 - TRAITEMENT ÉLECTRIQUE DE DONNÉES NUMÉRIQUES Équipement ou méthodes de traitement de données ou de calcul numérique, spécialement adaptés à des fonctions spécifiques