参考了HALCON例程和其他网友的思路, 简单地去除周期性噪声方法如下. 因是初学者,所以有错误的地方还请多多指正.
素材图片：
程序：
read_image (Image1, 'C:/Users/Administrator/Desktop/a1.png')
get_image_size (Image1, Width, Height)
fft_generic (Image1, ImageFFT, 'to_freq', -1, 'sqrt', 'dc_center', 'complex')
dev_set_draw ('margin')
power_real (ImageFFT, ImageResult)
binomial_filter (ImageResult, ImageBinomial, 5, 5)
threshold (ImageBinomial, Region, 100, 10000)
connection (Region, ConnectedRegions)
select_shape (ConnectedRegions, SelectedRegions, 'area', 'and', 5, 200)
union1 (SelectedRegions, RegionUnion)
reduce_domain (ImageBinomial, RegionUnion, ImageReduced)
local_max (ImageReduced, LocalMaxima)
shape_trans (LocalMaxima, RegionTrans, 'convex')
dilation_circle (RegionUnion, RegionDilation, 3)
paint_region(RegionDilation,ImageFFT,ImageResult1,0,'fill')
fft_generic (ImageResult1, ImageFFT1, 'from_freq', 1, 'sqrt', 'dc_center', 'byte')
dev_display (ImageFFT1)结果如下：
大部分处理了,但还有四周少量的未能处理掉, 不知哪位指点一二