JPS6470028A - Shading system of three-dimensional image - Google Patents

Shading system of three-dimensional image

Info

Publication number
JPS6470028A
JPS6470028A JP62226313A JP22631387A JPS6470028A JP S6470028 A JPS6470028 A JP S6470028A JP 62226313 A JP62226313 A JP 62226313A JP 22631387 A JP22631387 A JP 22631387A JP S6470028 A JPS6470028 A JP S6470028A
Authority
JP
Japan
Prior art keywords
inclination
adjacent point
normal line
dimensional image
size
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62226313A
Other languages
Japanese (ja)
Inventor
Koichi Morishita
Tetsuo Yokoyama
Hiroshi Takagi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Hitachi Healthcare Manufacturing Ltd
Original Assignee
Hitachi Ltd
Hitachi Medical Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd, Hitachi Medical Corp filed Critical Hitachi Ltd
Priority to JP62226313A priority Critical patent/JPS6470028A/en
Publication of JPS6470028A publication Critical patent/JPS6470028A/en
Pending legal-status Critical Current

Links

Landscapes

  • Analysing Materials By The Use Of Radiation (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Image Generation (AREA)

Abstract

PURPOSE:To enhance the image quality of a three-dimensional image by remov ing an artifact, by extracting the inclination of the adjacent point of a distance image becoming a basis and adaptably changing the size of the surface bonded to a surface for calculating a normal line vector corresponding to said inclina tion. CONSTITUTION:The inclination of the adjacent point of a distance image formed of the triangle surface 112 bonded to a surface 11 for calculating a normal line vector 111 is suitably changed corresponding to said inclination. When the inclination of the aforementioned adjacent point is small, the inclination with a further separated point is calculated and the size of the triangle surface is widened until exceeds a threshold value set beforehand. For example, when the inclination with the just adjacent point exceeds the threshold value, the triangle surface of the min. size set beforehand is supposed. Since change of the normal line vector 111 determining shading can be made smooth, the image quality of an obtained three-dimensional image is enhanced.
JP62226313A 1987-09-11 1987-09-11 Shading system of three-dimensional image Pending JPS6470028A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62226313A JPS6470028A (en) 1987-09-11 1987-09-11 Shading system of three-dimensional image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62226313A JPS6470028A (en) 1987-09-11 1987-09-11 Shading system of three-dimensional image

Publications (1)

Publication Number Publication Date
JPS6470028A true JPS6470028A (en) 1989-03-15

Family

ID=16843242

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62226313A Pending JPS6470028A (en) 1987-09-11 1987-09-11 Shading system of three-dimensional image

Country Status (1)

Country Link
JP (1) JPS6470028A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007020873A (en) * 2005-07-15 2007-02-01 Hitachi Medical Corp Medical image processing device and image processing program

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007020873A (en) * 2005-07-15 2007-02-01 Hitachi Medical Corp Medical image processing device and image processing program

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