Question

halcon怎样显示图像的直方图

Answer 1

有例子啊！
比如下面的例子代码
* Calculate the gray value distribution of two regions of an image
*
read_image (Image, 'fabrik')
dev_close_window ()
get_image_size (Image, Width, Height)
dev_open_window (0, 0, Width, Height, 'black', WindowID)
dev_display (Image)
dev_set_draw ('margin')
dev_set_color ('red')
* Create two rectangles parallel to the coordinate axes
gen_rectangle1 (Rectangle1, 351, 289, 407, 340)
dev_set_color ('green')
gen_rectangle1 (Rectangle2, 78, 178, 144, 244)
gray_histo (Rectangle1, Image, AbsoluteHisto1, RelativeHisto1)
gray_histo (Rectangle2, Image, AbsoluteHisto2, RelativeHisto2)
dev_set_color ('red')
* Convert a histogram created with gray_histo into a region
gen_region_histo (Histo1, AbsoluteHisto1, 255, 255, 1)
dev_set_color ('green')
gen_region_histo (Histo2, AbsoluteHisto2, 255, 255, 1)