Blob分析实现缺陷检测

检测饼干的缺陷，blob+特征

1、正常的图

2、有缺陷的图

3、代码

* This example demonstrates a quality inspection on hazelnut wavers.
* Using the morphology tools the waver is extracted and examined
* according to a few shape features like Rectangularity and AreaHoles.
* This program also shows the use of the operator area_holes.
* 
read_image (Image, 'food/hazelnut_wafer_01')
dev_close_window ()
dev_open_window_fit_image (Image, 0, 0, -1, -1, WindowHandle)
dev_update_window ('off')
dev_set_line_width (3)
dev_set_draw ('margin')
set_display_font (WindowHandle, 20, 'mono', 'true', 'false')
* 
for Index := 1 to 24 by 1
    read_image (Image, 'food/hazelnut_wafer_' + Index$'.02')
    binary_threshold (Image, Foreground, 'smooth_histo', 'light', UsedThreshold)
    opening_circle (Foreground, FinalRegion, 8.5)
    area_holes (FinalRegion, AreaHoles)
    rectangularity (FinalRegion, Rectangularity)
    dev_display (Image)
    if (AreaHoles > 300 or Rectangularity < 0.92)
        dev_set_color ('red')
        Text := 'Not OK'
    else
        dev_set_color ('forest green')
        Text := 'OK'
    endif
    dev_display (FinalRegion)
    disp_message (WindowHandle, Text, 'window', -1, -1, '', 'false')
    if (Index < 24)
        disp_continue_message (WindowHandle, 'black', 'true')
        stop ()
    endif
endfor