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Coordinate conversion method and device

A technology of coordinate transformation and coordinate transformation matrix, which is applied in graphics and image transformation, image data processing, instruments, etc., can solve the problems of affecting machine accuracy, inaccurate mapping relationship, affecting the quality and efficiency of image processing algorithms, etc., to improve quality and efficiency. Efficiency, the effect of improving accuracy

Active Publication Date: 2014-03-19
CETC BEIJING ELECTRONICS EQUIP
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a coordinate conversion method and device to solve the problem that the mapping relationship is inaccurate, affects the quality and efficiency of the image processing algorithm, and affects the accuracy of the machine

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Embodiment Construction

[0054] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0055] The invention provides a coordinate conversion method and device, which determines pixels by non-unidirectional movement of a dicing machine workbench, solves the problem of mapping between image pixel coordinates and workbench coordinates, and improves the accuracy of mapping.

[0056] likefigure 1 As shown, the coordinate transformation method provided by the embodiment of the present invention includes:

[0057] Step 1, taking one point as the origin of the coordinate system, obtaining the first worktable coordinate difference vector of the worktable moving from the origin to the first target position and the image of the workpiece loaded on the workbench moving from the origin a first image coordinate difference vector to the first target posi...

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Abstract

The invention provides a coordinate conversion method and device, relating to the field of a wafer scriber and solving the problems of inexact mapping relationship, influence to quality and efficiency of an image processing algorithm and influence to precision of a machine. The coordinate conversion method comprises the steps of: regarding one point as an original point of a coordinate system, and obtaining a first workbench coordinate difference vector of a workbench from the original point to a first target position and a first image coordinate difference vector of an image of a processing object on the workbench from the original point to the first target position; obtaining a coordinate conversion matrix based on the first workbench coordinate difference vector and the first image coordinate difference vector; performing conversion between the coordinate of the workbench and the coordinate of the image of the processing object based on the coordinate conversion matrix. Pixels are determined through non-single-direction movement of the workbench of the wafer scriber, so that the problem of mapping between the image pixel coordinate and the workbench coordinate is solved, and the mapping precision is improved.

Description

technical field [0001] The invention relates to the field of dicing machines, in particular to a coordinate conversion method and device. Background technique [0002] The visual recognition system of the dicing machine is a computer-based real-time image processing system. The operator or computer recognizes and analyzes the wafer image displayed on the screen, and then performs corresponding operations. The accurate operation of the wafer requires that the corresponding position of the actual wafer can be accurately located through a certain point in the image, that is, the precise mapping between the image pixel coordinate system and the workbench coordinate system is realized. important. The following technical problems exist in the prior art. The mapping relationship is inaccurate, which affects the quality and efficiency of the image processing algorithm and affects the accuracy of the machine. Contents of the invention [0003] The technical problem to be solved b...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/00
Inventor 刘晓斌孟繁滨刘婷婷
Owner CETC BEIJING ELECTRONICS EQUIP
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