Halcon Study notes-(one) IMAGE,REGION,XLD preliminary

3 Ways to read:

Read_image (image, ' filename ')       //image is the output object followed by the path and name of the input file

Read multiple graphs:
1, declare an array, save the path separately

ENDfor

2,for Cycle

3. Read all the files in the directory
Assistant, open image, select Path, insert code

List_files (input file directory address, select the requirements (files specify choose file format, recursive recursion, drill down all, derectories Select folder, follow_links,max_depth 5 ...), List of selected files for output)

Select a tuple that conforms to the rule, where \ \. is an escape character, equivalent to '--'
Tuple_regexp_select (file name, [' \ \ \. ( Bmp|tif) $ ', ' ignore_case ignoring case '], output)
Fabric file path

Two-image variable region
Pretreatment:

Eliminate noise	Mean_image/binomial_filter
Suppresses small spots or thin lines	Median_image
Smooth	Smooth_image
Preserve the smoothing of edges	Anisotropic_diffusion

Variable region:
Region is a subset of some of the required properties of pixels, or some of the selected tile area s,region size is not limited by the image, there are fill and margin two expressions, similar to the run-length encoding, can be used for compression, eg: A2B3C4 represents AABBBCCCC

Region operation:
Select the appropriate area

Select_shape (Regions,output, ' Select Type ',.. Requirements

Calculate the area of the corresponding area, center coordinates:

Area_center (Regions,area,row,column)

Conversion of irregular regions:

Shape_trans (Region,regiontrans,type)

Convex hull convex (surrounded by outward inner)

Outer_circle Outer Circle (capable of including the smallest circle of the object's radius)

Inner_circle Inner Circle

Rectangle1 Positive Rectangle

Rectangle2 Minimum bounding rectangle

Inner_rectangle1 Maximum inner Rectangle

Three-figure variant XLD (eXtended line descriptions)

XLD represents sub-pixel contour or polygon

Threshold_sub_pix (Inputimage, output,requirement)

GEN_CONTOUR_REGION_XLD (Inputregion,output,...)

XLD selection operation (SELECT_SHAPE_XLD/SELET_CONTOURS_XLD):

SELECT_SHAPE_XLD (Xld:selectedxld:features,operation,min,max:)

SELECT_CONTOURS_XLD (contours:selectedcontours:feature,min1,max1,min2,max2:)

Calculate the area of the XLD and the center position:

AREA_CENTER_XLD (Xld:::area,row,column,pointorder)

Xld the merge operation:

UNION_COLLINER_CONTOURS_XLD: Merging xld of the same line

UNION_COCIRCULAR_CONTOURS_XLD: Merging the xld of the same circle

UNION_ADJACENT_CONTOURS_XLD: Merging adjacent xld

The XLD conversion operation is similar to region:

SHAPE_TRANS_XLD (XLD:XLDTrans:Type:)

There are several types above

XLD split operation (SEGMENT_CONTOURS_XLD)

Splits the initial xld into lines, lines and circles, lines and ellipses

Segment_contours_xld (Contours:contourssplit:mode,smoothcont, MaxLineDist1, MaxLineDist2:)

The Xld fitting operation (FIT_***_CONTOUR_XLD) fits the incomplete shape into a complete

Fit_line_contour_xld

Fit_circle_contour_xld

Fit_ellipse_contour_xld

Fit_rectangle2_contour_xld

Summarize:

Image and video, file read

A preliminary introduction to region and XLD

Attention:

The results extracted from the use of Edges_sub_pix are often not complete circles, and a union is required to integrate the complete circle.

Halcon Study notes-(one) IMAGE,REGION,XLD preliminary