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Assignee4D Sensor Inc.
InventorsYoshiharu MORIMOTO, Yoshiyuki KUSUNOKI, Masaki UEKI, Akihiro MASAYA, Akifumi TAKAGI
Estimating the term…
A measurement method according to which: an image of a grid projected on a reference plane is taken; the optical system is adjusted so that the phase of the projected grid is gained by dividing 2mπ (m is an integer) by Mx×Ny (=M) (Mx and Ny are an integer of 2 or greater) within a rectangle made up of Mx pixels in the x direction and Ny pixels in the y direction of the image gained by taking an image of the grid projected on the above-described reference plane; an image is taken of a grid pattern projected on an object placed on the above-described reference plane; the brightness value is found by dividing 2mπ by Mx×Ny in a rectangular region of Mx×Ny pixels made up of Mx pixels in the x direction and Ny pixels in the y direction of the image gained by taking an image of the grid pattern projected on said object; a phase is found using said brightness value; an image is taken of the grid pattern projected on the object placed on the above-described reference plane; the above-described phase is found by shifting the grid pattern projected on the above-described object for each pixel of the image; and location of the surface of the object is found on the basis of the phase.
A measurement method for selecting a rectangle made up of Mx pixels in the x direction and Ny pixels in the y direction (Mx and Ny are an integer of 2 or greater) from a grid image that has been projected on a surface of an object or that has been gained by taking an image of a grid drawn on the surface of an object, inputting an image in a state where the optical system has been adjusted in such a manner that the grid phase of said projected grid image or said drawn grid is gained by dividing 2mπ (m is an integer) by Mx×Ny within the rectangle, sampling a rectangular region made up of Mx pixels in the x direction and Ny pixels in the y direction of said grid image or an image of said grid from said inputted image, and finding a phase on the basis of the brightness of pixels in said rectangular region.
A measurement method, comprising the steps of:
A measurement method, comprising the steps of:
Dependencies are inferred from the claim text.