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Description: 极大值抑制与双阈值门限得到图像边缘
* hysthresh.m code for performing hysteresis thresholding.
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Size: 1412 |
Author: asdasdasd |
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Description: 极大值抑制与双阈值门限得到图像边缘
* hysthresh.m code for performing hysteresis thresholding.
-Maxima suppression and dual-threshold threshold obtained Edge* hysthresh.m code for performing hysteresis thresholding.
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Size: 1024 |
Author: asdasdasd |
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Description: matlab code-Function performs hysteresis thresholding of an image.
All pixels with values above threshold T1 are marked as edges
All pixels that are adjacent to points that have been marked as edges
and with values above threshold T2 are also marked as edges. Eight
connectivity is used.-matlab code-Function performs hysteresis thresholding of an image.
All pixels with values above threshold T1 are marked as edges
All pixels that are adjacent to points that have been marked as edges
and with values above threshold T2 are also marked as edges. Eight
connectivity is used.
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Size: 2048 |
Author: mahmood |
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Description: Edge detection result should be enhanced using linear method like Median filter to
remove the garbage around the pupil to gain clear pupil to determine perfect centre. Get the
centre of the pupil by counting the number of black pixels (zero value) of each column and
row. Then get each row and column that has the maximum number of these black pixels.
Then determine the center by simple calculation according to the image coordinate to set it
correct on the image, consequently we can determine the radius of the pupil. Thus we can find
the pupillary boundary (inner). A similar procedure is extended by using a coarse scale to
locate the outer boundary (limbus) which can be apparent by using the mid-point algorithms
of circle and ellipse.
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Size: 2048 |
Author: boss |
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Description: Hysteresis thresholding
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Size: 1024 |
Author: Joã o Manuel |
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Description: nonmaxsup——非最大值抑制
hysthresh——设定阈值区间，返回一个二值化图像
canny——边缘探测，图像边缘增强
adjgamma——调整图像的伽马值
findline——利用线性Hough变换和Canny边缘探测得到的线上各点的坐标
circlecoords——返回由圆的半径和圆心坐标决定的圆上各点像素的坐标
houghcircle——取一幅经过canny变换的图像，利用hough变换找到图像中的一个圆
findcircle——计算所得线上各点的坐标归纳出一个圆的半径和圆心，确定该圆的各点坐标
gaborconvolve——利用一维盖伯滤波器对图像进行处理
gethammingdistance ——返回两幅虹膜图像提取的特征码之间的海明距离
linecoords——返回一条线的上各点的x,y坐标值-nonmaxsup- non-maximum suppression hysthresh- set the threshold range, returns a binary image canny- edge detection, image edge enhancement adjgamma- adjust the image' s gamma value findline- linear Hough transform and Canny edge detection get the coordinates of each point circlecoords online- Returns coordinate houghcircle on the circle of the radius and center coordinates of the points decision pixels- After taking a picture canny transformation, using hough transform to find the image of a circle findcircle- the calculated coordinates of each point line summed up a circle of radius and center, to determine the coordinates of each point of the circle gaborconvolve- using a 维盖伯 filter for image processing gethammingdistance- returns two iris images extracted linecoords Hamming distance between the signature- a return line to the points on the x, y coordinate values
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Size: 4573184 |
Author: 廖志伟 |
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