用halcon算子写一个车牌识别程序
时间: 2023-09-16 09:08:52 浏览: 123
车牌识别是一个比较复杂的问题,需要使用多个算子和技术才能实现。以下是一个基本的车牌识别程序,供参考:
1. 读取图像
```
read_image(Image, '车牌图像.jpg')
```
2. 灰度化
```
gray_image(Image, GrayImage)
```
3. 预处理
```
gauss_filter(GrayImage, GaussImage, 5)
dyn_threshold(GaussImage, Region, 15, 'dark')
```
4. 区域筛选
```
select_shape(Region, SelectedRegions, 'area', 'and', [500, 5000])
```
5. 区域分割
```
connection(SelectedRegions, ConnectedRegions)
```
6. 区域合并
```
select_shape(ConnectedRegions, SelectedRegions, 'height', 'and', [30, 100])
select_shape(SelectedRegions, SelectedRegions, 'width', 'and', [100, 500])
select_shape(SelectedRegions, SelectedRegions, 'compactness', 'and', [1.5, 3.0])
union1(SelectedRegions, PlateRegion)
```
7. 字符分割
```
gen_contours_xld(PlateRegion, Contours, 'border')
select_shape(Contours, SelectedContours, 'height', 'and', [10, 100])
select_shape(SelectedContours, SelectedContours, 'width', 'and', [5, 50])
select_shape(SelectedContours, SelectedContours, 'compactness', 'and', [1.5, 3.0])
```
8. 字符识别
```
read_string(OCRHandle, 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789')
do_ocr_word(SelectedContours, OCRResults, OCRHandle, [], [], [])
```
这是一个简单的车牌识别程序,具体的实现方式可能因场景和需求不同而有所调整。
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