Study on the Method of the Accuracy Evaluation of Sub-Pixel Location Operators

Guodong, 刘国栋 Liu; Bingguo, 刘炳国 Liu; Fengdong, 陈凤东 Chen; Tao, 胡涛 Hu

doi:10.3788/aos20092912.3446

Cited by 7 publications

(2 citation statements)

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“…x y (4) Note that equation (4) is second-order curve to x, which can be fit using the value after the function had been taken logarithm. The calculation can be simplify greatly after the top point location is determined.…”

Section: Introductionmentioning

confidence: 99%

“…People can get the shape size data of ceramic tile using the technique of computer visualize measurement with the method of sub-pixel image measurement processing algorithm. This method avoid the human impact towards data and also increase its measurement accuracy and degree of automation [2] [4][5] [6] . Edge are shown in the image as a gray scale distribution.…”

Section: Introductionmentioning

confidence: 99%

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Application Research for Online Quick Location Algorithm for Ceramic Tile Edge

Zhang¹,

Liu²

2013

2013 Third International Conference on Instrumentation, Measurement, Computer, Communication and Control

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Target the online size measurement of ceramic tile, author came up with a new online measuring method towards image fast sub-pixel edge. First, using the standard Sobel operator to rough locate the edge point. Make sure the sub-pixel location and the direction of the edge. Then expend the pixel along the edge direction of the edge point in order to get more accurate location of the edge. Experiment shows that this method can increase the accuracy of edge measurement. Error of the linear portion measurement is less than 0.04mm.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%