Halcon-图像视频采集

待我称王封你为后i 2023-01-08 08:24 192阅读 0赞

当相机环境配置好后，就可以进行图像和视频数据的采集了。图像视频的采集是机器视觉的输入项，采集图像的速度和质量会直接影响图像处理的效率。

**1.读取图像文件**

单张和批量读取：read\_image(Image,“xxx.jpg”)

read_image (Image, 'C:/Users/xxx/Pictures/RGB.jpg')
    list_files ('C:/Users/xxx/Pictures',['files','follow_links'],ImageFiles)
    tuple_regexp_select (ImageFiles, ['\\.(tif|png)$','ignore_case'], ImageFiles)
    for Index:=0 to |ImageFiles| -1 by 1
        read_image(Image,ImageFiles[Index])
    endfor

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY0NTI4MQ_size_16_color_FFFFFF_t_70]  
read\_image算子![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY0NTI4MQ_size_16_color_FFFFFF_t_70 1]采集助手中选择文件也可以读取单张或者批量图像。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY0NTI4MQ_size_16_color_FFFFFF_t_70 2]  
**2.读取视频文件**  
采集助手中选择图像获取接口，选择DirectFile，然后在连接中选择媒体文件。

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY0NTI4MQ_size_16_color_FFFFFF_t_70 3]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY0NTI4MQ_size_16_color_FFFFFF_t_70 4]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY0NTI4MQ_size_16_color_FFFFFF_t_70 5]

open_framegrabber ('DirectFile', 1, 1, 0, 0, 0, 0, 'default', -1, 'default', -1, 'false', 'D:/testimage/CXK.avi', 'default', 1, -1, AcqHandle)
    grab_image_start (AcqHandle, -1)
    while (true)
        grab_image_async (Image, AcqHandle, -1)
    endwhile
    close_framegrabber (AcqHandle)

**3.实时采集图像**

open_framegrabber ('DirectShow', 1, 1, 0, 0, 0, 0, 'default', 8, 'rgb', -1, 'false', 'default', '[0] ', 0, -1, AcqHandle)
    grab_image_start (AcqHandle, -1)
    while (true)
        grab_image_async (Image, AcqHandle, -1)
        * Image Acquisition 01: Do something
    endwhile
    close_framegrabber (AcqHandle)

![在这里插入图片描述][20210119174844196.gif_pic_center]

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[20210119174844196.gif_pic_center]: /images/20221119/cf65b4a571374675b09e9f8c54a11856.png