A METHOD FOR INTERACTING WITH VOLUMETRIC IMAGES BY GESTURES AND A SYSTEM FOR INTERACTING WITH VOLUMETRIC IMAGES BY GESTURES

摘要

A method for interacting with volumetric images by gestures, comprising: processing the volumetric images, in a processing unit (110) provided with a processor (111) and a memory (112), in response to user's hand gestures received by a camera (130), connected to the processing unit (110) and configured to measure image depth; and displaying the processed images on a display unit (120) connected to the processing unit (110). The following steps are performed in the processing unit (110): receiving, from the camera (130), a signal representing a series of depth maps in a form of bitmaps for an empty area, calculating an averaged depth map (ADM) and storing the averaged depth map (ADM) in the memory (112); receiving, from the camera (130), a signal representing a current depth map (CDM) in a form of a bitmap; calculating a differential depth map (DDP) representing a difference between the current depth map (CDM) and the averaged depth map (ADM); selecting, in the differential depth map (DDM), a pixel that is the nearest to a camera eye and pixels distant from it by a predetermined threshold value range, and storing the selected pixels as a selected depth map (SDM); determining a value of an average inequality of a manipulating plane (MP) located between the points of the selected depth map (SDM); determining a type of the user's hand gesture: as a grab gesture, when the average inequality of the manipulating plane (MP) is higher than a predetermined upper threshold value of a gesture; and as a flat hand gesture, when the average inequality of the manipulating plane (MP) is lower than a predetermined lower threshold value of a gesture; determining a section plane having four vertices (W1, W2, W3, W4) and superimposing the section plane over the volumetric image; changing the position of the section plane depending on the received user's hand gestures; and displaying, on the display unit, the volumetric image in a section corresponding to the current position of the section plane.