CN1687970A - Interactive controlling method for selecting 3-D image body reconstructive partial body - Google Patents
Interactive controlling method for selecting 3-D image body reconstructive partial body Download PDFInfo
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- CN1687970A CN1687970A CN 200510042608 CN200510042608A CN1687970A CN 1687970 A CN1687970 A CN 1687970A CN 200510042608 CN200510042608 CN 200510042608 CN 200510042608 A CN200510042608 A CN 200510042608A CN 1687970 A CN1687970 A CN 1687970A
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Abstract
The invention is an interactive controlling method for the reformed part of a 3D medicinal image, using a projection image of the original 3D data on a coordinate plane as a background and polyhedron displaying reference plane for a user to draw an arbitrary 2D polygon on the reference plane, stretching the polygon in the direction of the depth of a computer to compose a polyhedron, and adopting different colors, lines and so on to mark the sides, top points and reference axes of the polyhedron; and using the polyhedron as a selected data body in reforming 3D image so that the user can select the point and reference axes of a local reference frame of the polyhedron and control the selected data body by changing shape, 3D spatial position, and rotating direction of the polyhedron with mouse or keyboard; besides, displaying the change result of position, direction and structure of the polygon on the screen.
Description
Technical field
The present invention relates to Computerized three-dimensional medical image technical field, is the interaction control method that a kind of 3 d medical images volume reconstruction part body is selected.
Background technology
The purpose that 3 d medical images is rebuild is to recover the image of observing from three-dimensional perspective from various Medical Slice Images data, thereby provides more intuitive foundation for diagnosis.The method of three-dimensional image reconstruction comprises face reconstruction and volume reconstruction two big classes.The 3 d medical images raw data is the data point of arranging according to three-dimensional lattice, simple backprojection reconstruction, the user can only see these preceding, on, the projection of right three view directions.Complicated three-dimensional image reconstruction by the imaging process of imitation camera, produces the reconstructed image of simulation human eye observing effect in any direction.In method for reconstructing, it is the most frequently used a kind of that plane projection is rebuild.In order to reach this purpose, need select interested data volume from whole three-dimensional data (is that data are reduced body, because the interested a part of often data of user, if do not remove, the data of other positions can be blocked these data), and tell computing machine to carry out the space position parameter on the plane of image reconstruction.
The user uses for convenience, and the disposal route that can select image of interest data volume and projection plane by mouse, keyboard need be provided.This just need come out the profile on data volume of selecting and reduction plane on computers with diagrammatic representation, offer the user simultaneously by controlling the method that these figures come control data body parameter.The graphic presentation of the parameter of face, above-mentioned object and the pairing computer operation of modification parameter.
Existing volume data system of selection is to use a cube to be used as selecting data cell, be the user the data volume that can select be restricted to cube, this cube is to stretch along depth coordinate axle Z direction by a rectangle at X-Y plane to form, wherein the X-Y coordinate is the screen coordinate of computer graphics, the Z coordinate is a depth coordinate, so this cubical depth coordinate axle that always is parallel to computing machine perpendicular to four facing surfaces of X-Y plane.Interaction control method is: the user controls the position of cube in the middle of volume data by center, direction that mouse changes this rectangle, thereby realizes the selection (data of rectangle inside are interested view data) to data.Because this method has limited this cube and has always had four edges parallel with the depth coordinate axle, therefore, cubical projecting direction can not cover any one direction, and the locus that cube covered also is limited, and so just having limited user institute can observed scope.Though can be based on using this define method to expand the coverage area respectively on preceding, left, last three view directions, the direction of pairing reconstruction projection plane is still limited.
Summary of the invention
Technical matters to be solved by this invention provides the mutual system of selection that a kind of new 3-D image body reconstructive partial body is selected, this method can realize the selection to any direction and position data body, make the user can see interested data in the projection of other directions.
The thinking that addresses the above problem is: a coordinate plane projection image with original three-dimensional data is a background, the one-piece construction of performance three-dimensional data; By drawing a polyhedron shows this polyhedral locus and shape and reconstruction projection at the projection polygon of this coordinate plane projection plane; Method and the corresponding mouse action of definition by designed drawing polygonal realize that in proper order one can cover the polyhedron position on any range and aphylactic map projection plane, the modification of shape.In the present invention, object coordinates system at a part of polyhedron definition, polyhedral all spatial decomposition are the variation of polyhedron in this object coordinates system and two parts of variation of object coordinates system: 1) polyhedral change includes only in the object coordinates system: the variation of reference plane, the change of polyhedral thickness, and polyhedron does not move and rotation in object coordinates system; 2) mobile, the rotation of object coordinates system have determined polyhedral moving and rotation.By defining the corresponding relation of various mouse actions and above-mentioned variation, just generated the system of selection of corresponding 3-D data volume.
The step of the interaction control method that the 3-D image body reconstructive partial body that is provided is selected is as follows:
1) at first, be the reference planes that background and polyhedron show with the image of a plane projection of volume data, the user draws a two-dimentional arbitrary polygon on this plane, perhaps provide a polygon on this plane automatically by computing machine;
2) during original state,, constitute a polyhedron at the depth direction of computer screen this polygon that stretches, with this polyhedron as the selection data volume in the 3-D view volume reconstruction, wherein
2.1) sideline of this polyhedral each face draws with dissimilar line styles or color;
2.2) simultaneously, with the projecting plane of this polyhedral face, with the summit on this projecting plane initial point as the polyhedron local coordinate system as the three-dimensional data backprojection reconstruction; During original state, with a limit crossing this point X-axis as coordinate system, the line of crossing this point and normal to screen is the Z axle, and three coordinate axis of aforesaid local coordinate system are drawn to distinguish with different colours.
2.3) be divided into two kinds of colors or this polyhedral each summit of pictorial symbolization according to distance with user distance;
3) user can select the initial point and the coordinate axis of this polyhedral local coordinate system;
4) user controls selected data volume by mouse or keyboard to the change of this polyhedral shape, three-dimensional space position, sense of rotation, wherein
4.1) polyhedral shape control: select the summit of the nearest face of polyhedron, the mode that changes this vertex position by mouse drag realizes;
4.2) polyhedral position control: the nearest face of selection polyhedron, the mode that changes this face local coordinate system origin position by mouse drag realizes;
4.3) polyhedral direction control: change the coordinate axis of selected polyhedron local coordinate system and the angle between screen coordinate system by rolling mouse;
5) result with polyhedron position, direction, structural change is simultaneously displayed on the screen.
Above-mentioned said this polyhedral each face is drawn with dissimilar line segments: each limit depicted as solid lines of the face that the distance calculation screen is nearest, and each limit with dashed lines of the parallel surface that it is corresponding is drawn, and draw with dot-and-dash line on the limit of other face; Also can be: each limit depicted as solid lines of the face that the distance calculation screen is nearest, see the limit with dashed lines drafting that is blocked from three-dimensional perspective.
Compared with prior art, the present invention uses arbitrary polygon to come the definition of data body, can make the user select interested volume data in any direction with on the position by the control of user interactions ground, the three-dimensional polyhedral mechanism of modification.In addition, adopt polygon, especially the polyhedron of concave polygon generation can reduce and block, and produces better observing effect, and observable zone of user and direction can be more; And adopt different colors, line style to come polyhedral of mark, line, point, and the user is imagined intuitively three-dimensional structure, be convenient to operation and observation.
Description of drawings
Fig. 1 is the polygonal synoptic diagram of setting up of first embodiment of the invention data volume.
Fig. 2 is the synoptic diagram of first embodiment of the invention data volume.
Fig. 3 is the synoptic diagram of second embodiment of the invention.
Embodiment
As shown in Figure 1 and Figure 2: the X-Y coordinate is the planimetric coordinates of computer screen, and Z is a depth coordinate.At first draw a rectangle abcd at the X-Y coordinate plane, rectangle abcd is being stretched along Z-direction, form cube abcd-a ' b ' c ' d ' e ', this cubical coordinate system is identical with screen coordinate system.Selection is the projecting plane from the nearest rectangle abcd of computer screen, its each limit depicted as solid lines, and rectangle a ' b ' c ' d ' e ' with dashed lines in parallel is drawn, and draw with dot-and-dash line on other limit.Summit a, b, c, d mark with circle and redness, the blue mark of summit a ' usefulness.Select the initial point of summit a, select coordinate axis Y as this polyhedral rotatable coordinate axis as this polyhedron three-dimension varying.With above-mentioned definition and the cube that the marked data volume as the 3-D view volume reconstruction, wherein, object coordinates initial point a, rotatable coordinate axis Y, cubical summit b, c, d, a ' are as operational character number.The user selects these control characters by mouse, activates the control corresponding state, just can realize the selection to required direction and position data body.For example: select cube Y coordinate axis arrow, drag mouse, cube is around this coordinate axis rotation.Select summit c, drag mouse then, rectangle abcd changes shape.Select the another one summit a ' of initial point a correspondence, drag mouse, this cubical degree of depth changes.The effect of these changes alternatively shows on screen, and simultaneously the parameter of the said three-dimensional body of correspondence is offered the processing module of volume reconstruction, can make the user can see interested data in the projection of this direction.
The second embodiment of the present invention as shown in Figure 3, selected polygon is a pentagon, this pentagon stretches along the Z axle, forms a pentagonal prism body, wherein three-dimensional visible sideline depicted as solid lines, the sideline with dashed lines drafting that all the other are blocked.
Claims (3)
1, a kind of interaction control method of 3-D image body reconstructive partial body selection, its step is as follows:
1) at first, be the reference planes that background and polyhedron show with the image of a plane projection of volume data, the user draws a two-dimentional arbitrary polygon on this plane, perhaps provide a polygon on this plane automatically by computing machine;
2) during original state,, constitute a polyhedron at the depth direction of computer screen this polygon that stretches, with this polyhedron as the selection data volume in the 3-D view volume reconstruction, wherein
2.1) sideline of this polyhedral each face draws with dissimilar line styles or color;
2.2) simultaneously, with the projecting plane of this polyhedral face, with the summit on this projecting plane initial point as the polyhedron local coordinate system as the three-dimensional data backprojection reconstruction; During original state, with a limit crossing this point X-axis as coordinate system, the line of crossing this point and normal to screen is the Z axle, and three coordinate axis of aforesaid local coordinate system are drawn with different colours;
2.3) be divided into two kinds of colors or this polyhedral each summit of pictorial symbolization according to distance with user distance;
3) user selects the initial point and the coordinate axis of this polyhedral local coordinate system;
4) user controls selected data volume by mouse or keyboard to the change of this polyhedral shape, three-dimensional space position, sense of rotation, wherein
4.1) polyhedral shape control: select the summit of the nearest face of polyhedron, the mode that changes this vertex position by mouse drag realizes;
4.2) polyhedral position control: the nearest face of selection polyhedron, the mode that changes this face local coordinate system origin position by mouse drag realizes;
4.3) polyhedral direction control: change the coordinate axis of selected polyhedron local coordinate system and the angle between screen coordinate system by rolling mouse;
5) result with polyhedron position, direction, structural change is simultaneously displayed on the screen.
2, interaction control method according to claim 1, it is characterized in that said this polyhedral each face with dissimilar line segment draftings is: each limit depicted as solid lines of the face that the distance calculation screen is nearest, each limit with dashed lines of the parallel surface that it is corresponding is drawn, and draw with dot-and-dash line on the limit of other face.
3, interaction control method according to claim 1, it is characterized in that said this polyhedral each face with dissimilar line segment draftings is: each limit depicted as solid lines of the face that the distance calculation screen is nearest, see the limit with dashed lines drafting that is blocked from three-dimensional perspective.
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| CN102004612A (en) * | 2010-12-03 | 2011-04-06 | 深圳市蓝韵实业有限公司 | Method for rotating three-dimensional image |
| CN102169364A (en) * | 2010-02-26 | 2011-08-31 | 原相科技股份有限公司 | Interaction module applied to stereoscopic interaction system and method of interaction module |
| CN101770324B (en) * | 2008-12-31 | 2011-12-28 | 商泰软件(上海)有限公司 | Method for realizing interactive operation of 3D graphical interface |
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| US5297043A (en) * | 1987-11-27 | 1994-03-22 | Picker International, Inc. | Rapid display of rotated and translated three dimensional image representations |
| JP2667944B2 (en) * | 1992-09-28 | 1997-10-27 | 株式会社ナムコ | Pseudo three-dimensional image synthesizing apparatus and image synthesizing method |
| JPH07234927A (en) * | 1994-02-22 | 1995-09-05 | Toshiba Medical Eng Co Ltd | Three-dimensional image display device |
| JP2002133438A (en) * | 2000-10-19 | 2002-05-10 | Mitsubishi Electric Corp | Three-dimensional graphic plotting device, three- dimensional graphic plotting method, and recording medium capable of reading with three-dimensional polygon data recorded computer |
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| CN101770324B (en) * | 2008-12-31 | 2011-12-28 | 商泰软件(上海)有限公司 | Method for realizing interactive operation of 3D graphical interface |
| CN102073438B (en) * | 2009-11-23 | 2013-03-20 | 广达电脑股份有限公司 | Method for turning three-dimensional graphic object by utilizing touch sensing input device |
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