Abstract:
A system and method for determining inflection points in an image of an object includes obtaining the image of the object, performing binary image processing on a border of the image to obtain border points, selecting a predetermined number of the border points to fit a straight line, calculating a vertical distance between each selected border point and the straight line, and obtaining a total distance. The method further includes adding a new border point to the selected border points if the total distance is less than a predetermined value, so as to fit a new straight line and do a loop cycle, otherwise, regarding a last border point of the selected border points as an inflection point, and sequentially selecting the predetermined number of other border points to fit another new straight line.
Abstract:
A focus apparatus comprises a light apparatus emits the light onto an object, an optical apparatus, an image capture apparatus for receiving an image of the object through the optical apparatus, and converting the image into electronic signals, and a adapter. The adapter connects the light apparatus and the optical apparatus. The light apparatus transfers thermal energy generated by the light apparatus to the air of the surrounding environment, and scatters the light to make the light propagate uniformly.
Abstract:
A system and method for positioning a portion of an object to be measured includes installing a digital camera adjacent to a charge coupled device (CCD) lens of an image measuring machine, setting positioning parameters corresponding to different positions of the digital camera on a Z-axis of a world coordinate system, receiving an image of the object captured by the digital camera, and selecting corresponding positioning parameters according to a position of the digital camera. The method further includes selecting a point of the portion of the object in the image, calculating coordinates of the selected point in a plane of the CCD lens, and controlling the CCD lens to move to the calculated coordinates so as to position the CCD lens on the portion of the object.
Abstract:
A measuring device and method is used to select focusing points on an object. A CCD of the measuring device is positioned at the top of an initial focusing range, then moves to the bottom of the initial focusing range at a first speed to capture first images of the object. Image points corresponding to each focusing point in the first images are identified to compute coordinates of a first focal point of each focusing point. The initial focusing range is updated according to Z-coordinates of the first focal points. The CCD is positioned at the bottom of the updated focusing range, then, moves to the top of the updated focusing range at a second speed to capture second images of the object. Image points corresponding to each focusing point in the second images are identified to compute coordinates of a second focal point of each focusing point.
Abstract:
In a precision testing method of an optical lens using a computing device, the computing device is connected to an imaging system. The computing device controls the imaging system to generate an image of an object according to light rays reflected from the object and collected by the optical lens. A dimension of the object is measured from the image. A maximum value and a minimum value of the dimension of the object are determined. A difference between the maximum value and the minimum value is calculated. According to the difference, it is determined whether the optical lens agrees with a precision requirement.
Abstract:
In a method for measurement of flatness of objects on a measuring machine, at least two objects are fixed on a worktable of the measuring machine. The method establishes a first coordinate system for the worktable location, sets two groups of horizontal scanning points for each object, and sets two groups of vertical scanning points for each object. By controlling at least two laser heads of the measuring machine, the objects are measured and coordinate values for each of the points scanned are obtained. The method calibrates a first coordinate system and establishes a second coordinate system based on the first coordinate system. In the second coordinate system, the at least two laser heads measure the objects and obtain data, and an indication of the flatness of each object is calculated and displayed on a display device.
Abstract:
A light source is configured to be mounted to a vision measuring instrument that includes a primary image capture unit capturing an image of an object to be measured, and an auxiliary image capture unit providing a means to aim the primary image capture unit at a determined position. The light source includes a main body defining a through hole for receiving the primary image capture unit, and a mounting hole for readily mounting an auxiliary image capture unit. A luminescent surface is formed on an inner wall bounding the through hole of the main body. A number of light-emitting diodes (LEDs) is disposed on the luminescent surface.
Abstract:
A measurement apparatus includes a lamp mount including a first mount and a second mount. The first mount has a first cavity to mount an observation module. The second mount has a second cavity to mount an image capture module. The measurement apparatus further includes a plurality of light modules mounted on an undersurface of the lamp mount. The second mount is disposed with an included angle relative to a first axis of the first cavity so that a second axis of the second cavity and the first axis converge on a point. The undersurface of the lamp mount is concave so that light from the light modules tilts toward the first axis, and the light and the first axis also converge on the point.
Abstract:
A positioning system and method for focusing a charge coupled device (CCD) lens on a selected surface of an object to be measured is provided. The positioning system and method moves the CCD lens downwards to approximate an estimate Z-axis coordinate of the CCD lens, and moves the CCD lens upwards to find an accurate Z-axis coordinate of the CCD lens according to the selected surface of the object. The system and method further moves the CCD lens to a position corresponding to the accurate Z-axis coordinate to focus the CCD lens on the selected surface.
Abstract:
A system and method for determining inflection points in an image of an object includes obtaining the image of the object, performing binary image processing on a border of the image to obtain border points, selecting a predetermined number of the border points to fit a straight line, calculating a vertical distance between each selected border point and the straight line, and obtaining a total distance. The method further includes adding a new border point to the selected border points if the total distance is less than a predetermined value, so as to fit a new straight line and do a loop cycle, otherwise, regarding a last border point of the selected border points as an inflection point, and sequentially selecting the predetermined number of other border points to fit another new straight line.