초록 ▼

The present invention provides a system for illuminating an object with a special kind of structured light pattern, recording the shape of the reflected points of light by means of a camera, and, by a triangulation technique that does not depend on the fixed direction of the light source relative to

The present invention provides a system for illuminating an object with a special kind of structured light pattern, recording the shape of the reflected points of light by means of a camera, and, by a triangulation technique that does not depend on the fixed direction of the light source relative to the camera, reconstructing the 3D shape of the object through a computer using the data points collected from the reflection of the structured light pattern. The scanning system is portable and does not require data processing contemporaneous with the data collection. The portable system stores in the storage media several images of the objects with different illumination patterns. The data is subsequently processed, by a computer system which applies data processing routines, i.e., the model building algorithms which provide 3D surface generation. The data acquisition according to the present invention is simplified to acquiring of only two or, optionally, four images of the object, thereby significantly increasing the digitization speed over that of laser-based scanners. The light source projects both structured light and uniform illumination light from the same apparent source, and that allows for numerical normalization of the images.

대표청구항 ▼

The present invention provides a system for illuminating an object with a special kind of structured light pattern, recording the shape of the reflected points of light by means of a camera, and, by a triangulation technique that does not depend on the fixed direction of the light source relative to

The present invention provides a system for illuminating an object with a special kind of structured light pattern, recording the shape of the reflected points of light by means of a camera, and, by a triangulation technique that does not depend on the fixed direction of the light source relative to the camera, reconstructing the 3D shape of the object through a computer using the data points collected from the reflection of the structured light pattern. The scanning system is portable and does not require data processing contemporaneous with the data collection. The portable system stores in the storage media several images of the objects with different illumination patterns. The data is subsequently processed, by a computer system which applies data processing routines, i.e., the model building algorithms which provide 3D surface generation. The data acquisition according to the present invention is simplified to acquiring of only two or, optionally, four images of the object, thereby significantly increasing the digitization speed over that of laser-based scanners. The light source projects both structured light and uniform illumination light from the same apparent source, and that allows for numerical normalization of the images. d preceding stage. 5. A liquid crystal display device of claim 2, wherein an opposing area between said protruded spacer and said common electrode wire has a dimension which is narrower than a width of said common electrode wire and which is selected to be within an extent shorter than a distance between both outer sides of said pixel electrode. 6. A liquid crystal display device of claim 3, wherein an opposing area between said protruded spacer and said extended portion of said pixel electrode has a dimension which is narrower than a width of said common electrode wire and which is selected to be within an extent shorter than a length of said connected portion of said pixel electrode. 7. A liquid crystal display device of claim 4, wherein an opposing area between said protruded spacer and said extended portion of said pixel electrode has a dimension which is narrower than a width of said scan line at said preceding stage and which is selected to be within an extent shorter than a distance between both outer sides of said pixel electrode. 8. A liquid crystal display device of claim 1, wherein said second substrate is formed with color filter layers, and said protruded spacer is formed of a lamination of said color filters. 9. A liquid crystal display device of claim 8, wherein said scan line, said common electrode wire and said common electrode are formed on a common plane of said first substrate; said scan line and said common electrode wire extend in parallel with each other with interposing a pixel area therebetween; said data line and said pixel electrode are formed in a common plane on said insulating film; and said protruded spacer has a top contacted with an alignment film formed on said common electrode wire. profile for recording in response to the first signal; a pressure applying member movable in a second direction transverse to the first direction in response to the output signal and cooperating with the imaging member to adjust the pressure profile of the imaging member upon the recording medium, wherein the imaging member is a printhead having a plurality of recording elements, the printhead's recording elements being arranged in the second direction; and wherein the pressure applying member comprises an extension rod, a carriage supporting the extension rod for movement in the second direction to permit adjustment of location of application of pressure to the printhead in said second direction. 7. The apparatus of claim 6 wherein the printhead is a thermal recording printhead and a donor medium having a marking colorant is located between the printhead and the recording medium for transferring marking colorant to the recording medium. 8. The apparatus of claim 7 wherein the operating parameter is temperature of the printhead or a printhead component and the sensor is responsive to temperature of the printhead or the printhead component. 9. The apparatus of claim 7 wherein the operating parameter is one or more of the group of parameters consisting of temperature of the printhead or a component of the printhead, recording medium type and donor medium type, and plural sensors are provided that are responsive to different operating parameters for providing respective signals to the controller for adjusting the pressure profile. 10. The apparatus of claim 6 and including a second extension rod supported by a carriage and movable in said second direction to permit adjustment of location of application of pressure to the printhead by said second extension rod. 11. The apparatus of claim 10 and wherein each extension rod is mounted so as to be able to slide towards and away from the printhead, and a respective spring biased loading rod is associated with a respective extension rod, and wherein a motor is connected to each loading rod so that when the motor is driven there is adjustment to a loading force of the loading rod on its respective extension rod. 12. The apparatus of claim 11 and wherein a rack and pinion is connected to the carriage supporting the extension rod for adjusting position of the carriage and thereby position of the extension rod for movement in the direction that is transverse to the first direction. 13. The apparatus of claim 6 and wherein a rack and pinion is connected to the carriage supporting the extension rod for adjusting position of the carriage and thereby position of the extension rod for movement in the second direction. 14. The apparatus of claim 6 and wherein the extension rod is mounted so as to be able to slide towards and away from the printhead, and a spring biased loading rod is associated which the extension rod, and wherein a motor is connected to the loading rod so that when the motor is driven there is adjustment to a loading force of the loading rod on the extension rod. 15. The apparatus of claim 6 and wherein the controller comprises a microprocessor and including a lookup table that stores data to be used by the microprocessor for controlling the amount of pressure to be applied by the extension rod. 16. The apparatus of claim 15 and wherein a lookup table stores data to be used by the microprocessor for controlling location of pressure of an extension rod. 17. The apparatus of claim 6 and wherein the controller comprises a microprocessor and including a lookup table that stores data to be used by the microprocessor for controlling the location in the second direction for application of pressure to be applied by the pressure applying member. 18. A printing method for recording an image on an image recording medium using a printhead in pressure application with the medium, the method comprising: sensing an operating parameter of a recording operation during recording by the pri nthead; in response to said sensing, adjusting a pressure profile operating on the medium by the printhead to provide an adjusted pressure profile used in recording the image on the medium, wherein the printhead has a plurality of recording elements, the printhead recording elements being arranged in a first direction transverse to a second direction of movement of the recording medium; and wherein a carriage supports a pressure applying member for movement in the first direction and the pressure applying member is moved in the first direction to adjust location of application of pressure to the printhead to adjust pressure profile of the printhead on the image recording medium. 19. The method of claim 18 wherein the printhead is a thermal recording printhead and a donor medium having a marking colorant is located between the printhead and the recording medium for transferring marking colorant to the recording medium. 20. The method of claim 19 wherein the operating parameter is temperature of the printhead or a printhead component. 21. The method of claim 19 wherein the operating parameter is one or more of the group of parameters consisting of pressure, temperature of the printhead or a component of the printhead, recording medium type and donor medium type or a characteristic thereof. 22. The method of claim 21 wherein the recording medium moves while in a nip between the support and the printhead, and plural pressure applying members are moved in the transverse direction during recording of information on the recording medium to adjust the pressure profile. 23. The method of claim 22 wherein the printhead includes a heat sink and the pressure applying members move in a transverse slot formed in the heat sink to locate the pressure applying members at different locations along the printhead to adjust the pressure profile. 24. The method of claim 21 wherein the printhead includes a heat sink and the pressure applying member moves in a transverse slot formed in the heat sink to locate the pressure applying member at a different location along the printhead to adjust the pressure profile. 25. The method of claim 18 and wherein a second pressure applying member is supported by a carriage and is moved in said first direction to adjust location of application of pressure to the printhead by said second pressure applying member. 26. The method of claim 25 and wherein each pressure applying member includes an extension rod that is mounted for movement towards and away from the printhead, and a respective spring biased loading rod is associated with a respective extension rod and a respective motor is associated with its respective extension rod and each motor is respectively actuated for adjusting a respective loading force of each respective loading rod on its respective extension rod. 27. A printing method for recording an image on an image recording medium using a printhead in pressure engagement with the medium, the method comprising: sensing an operating parameter of a recording operation during recording by the printhead; in response to said sensing adjusting a pressure profile operating on the medium by the printhead to provide an adjusted pressure profile used in recording the image on the medium, wherein the printhead has a plurality of recording elements, the printhead's recording elements are arranged in a first direction transverse to a second direction of movement of the recording medium; and wherein the pressure applying member includes an extension rod that is mounted for movement towards and away from the printhead, and a spring biased loading rod is associated with the extension rod and a motor is actuated and adjusts a loading force of the loading rod on the extension rod. 28. The method of claim 27 and wherein the motor is controlled by a microprocessor. 29. The method of claim 28 and wherein a lookup table provides information to the microprocessor for controlling the amount of pressure and location o