halcon学习 预处理

图像增强

HALCON Operator Reference / Filters / Enhancement

直方图归一化

1. equ_histo_image
   

read_image (Image, 'mvtec_logo')
* 直方图归一化
equ_histo_image (Image, ImageEquHisto)

增强图像对比度

1. emphasize
   

read_image (Image, 'mvtec_logo')
* 增强对比度
emphasize (Image, ImageEmphasize, 7, 7, 1)

2. illuminate
   

read_image (Image, 'mvtec_logo')
* 增强对比度
illuminate (Image, ImageIlluminate, 40, 40, 0.55)

边缘增强

1. shock_filter
   冲击滤波器，对于边缘模糊的很有用，缺点速度慢
   

read_image (Image, 'mvtec_logo')
* 增强边缘
shock_filter  (Image, SharpenedImage, 0.5, 10, 'canny', 1)

灰度值拉伸

1. scale_image_max
   灰度值拉伸到0-255
   

read_image (Image, 'mvtec_logo')
* 灰度值拉伸到0-255
scale_image_max (Image, ImageScaleMax)

图像平滑去噪

HALCON Operator Reference / Filters / Smoothing

均值滤波

1. mean_image
   

read_image (Image, 'mvtec_logo')
* 均值滤波
mean_image (Image, ImageMean, 9, 9)

中值滤波

1. median_image
   

read_image (Image, 'mvtec_logo'