TECHNIQUE FORMING IMAGES AND DEFINING RELIEF OF OBJECTS OF COMPLICATED FORM Russian patent published in 2001 - IPC

FIELD: study and analysis of physical state of objects of complicated form with use of optical means, in particular, definition of relief of such objects as fired cartridges and bullets. SUBSTANCE: technique forming images and defining relief of objects of complicated form consists in placement and movement of optical system relative to object whose observation axis is perpendicular to optical axis of system and in formation of series of images. Images are reduced to single scale and matched in point of optical axis, images are divided into small areas and sharpness of each area is analyzed. Height of relief in each area is found by maximum sharpness, final image is formed from series of images in correspondence with obtained relief and each element of final image is selected from image of series nearest by relief. Thus each point of resulting image is away from object plane by distance less than depth of sharpness. That is why image of object of complicated profile in each point is optimal. Invention makes it possible to define relief of such objects of complicated form as cartridges and bullets and to bring to light characteristic indications of objects to solve problems of forensic ballistics. EFFECT: improved sharpness in definition of relieves of such objects of complicated form as fired cartridges and bullets. 14 cl, 9 dwg