HDevelop User's Manual

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6 CHAPTER 1. INTRODUCING HDEVELOP Figure 1.3: The displayed image is the threshold operation result. indicated person in shape and size. For this you have to call the operator ×ÐØ ×Ô in menu ÇÔÖØÓÖ× º ÊÓÒ× º ØÙÖ×. The first call is used to obtain a preselection with the estimated object size given in pixels. With an estimated size of ½ ¢ ½ pixels you will get approximately ¾¾ pixels. After choosing ×ÐØ ×Ô you specify the parameters as follows: 1. The input region will be ÓÒÒØÊÓÒ×ÝÒÌÖ×, 2. the output variable name remains unchanged, 3. values ³Ö³ and ³Ò³ remain unchanged. 4. The region’s minimum size should be ½¼ (ÅÒ) and 5. the region’s maximum size should not exceed ¼¼ (ÅÜ). 6. The mean intensity should be between ½¾¼ and ¾. In figure 1.4 the extended program can be seen. Now you have to extract from the remaining regions the regions that match the objects to look for. As you can see, the regions representing the marks have a circular shape — contrary to all others. This is expressed by a compactness value close to ½. For this you have to choose the operator ×ÐØ ×Ô once again. Use the combo box of the parameter text <strong>HDevelop</strong> / 2000-11-16
1.3. ADDITIONAL SOURCES OF INFORMATION 7 Figure 1.4: Region selection based on shape features. field ØÙÖ× to specify the value ÓÑÔØÒ××. As a range of values you may specify the parameters ÅÒ and ÅÜ with the values ½¼ and ½, respectively. The output regions of the first call (ËÐØÊÓÒ×) are the input regions for the second call of operator ×ÐØ ×Ô. The output parameter’s name ËÐØÊÓÒ× is replaced by the name ËÐØÊÓÒ×ÝÒÌÖ×. The last step to make the application stable is to add a selection of regions based on gray value features. This is done by using the operator ×ÐØ ÖÝ. In this case, the mean gray value is used to discriminate the objects. Finally, we want to obtain some numerical information about the matched marks. For example, we might want to compute three shape features of the marks. They are derived from the regions’ geometric moments. The calculation is done by the operator ÒØÖØÝ. The input parameters are all regions of the variable ÅÖ×. The computed values Ò×ÓÑØÖÝ, ÙÐÒ××, and ËØÖÙØÙÖØÓÖ are displayed as a list (a tuple in HALCON terminology) in the variable window. Figure 1.5 shows the example session’s result. As you can see in figure 1.5 and 1.4 it is possible to combine the two successive calls of ×ÐØ ×Ô into one call. This reduces the length of the program and saves runtime. 1.3 Additional Sources of Information Further information can be found in the following manuals: ¯ Getting Started with HALCON An introduction to HALCON in general, including how to install and configure HALCON. HALCON 6.0
Page 1 and 2: HALCON Version 6.0 MVTec Software G
Page 3 and 4: About This Manual This manual is a
Page 5 and 6: Contents 1 Introducing HDevelop 1 1
Page 7 and 8: Contents iii comment . . . . . . .
Page 9 and 10: Chapter 1 Introducing HDevelop In f
Page 11 and 12: 1.2. EXAMPLE SESSION 3 Figure 1.1:
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Page 27 and 28: 2.3. MAIN WINDOW 19 and not HDevelo
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Page 35 and 36: 2.3. MAIN WINDOW 27 in a graphics w
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Page 47 and 48: 2.3. MAIN WINDOW 39 output paramete
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Page 51 and 52: 2.3. MAIN WINDOW 43 ËÙ×ØÓÒ×
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2.7. GRAPHICS WINDOW 57 Figure 2.38
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Chapter 3 Language The following ch
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3.2. CONTROL TYPES AND CONSTANTS 61
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3.4. OPERATIONS ON ICONIC OBJECTS 6
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3.5. EXPRESSIONS FOR INPUT CONTROL
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3.6. RESERVED WORDS 77 ÓÖ, ÜÓÖ
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3.8. LIMITATIONS 79 In the followin
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Chapter 4 Code Generation The idea
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4.1. CODE GENERATION FOR C++ 83 Ì
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4.1. CODE GENERATION FOR C++ 85 tha
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4.2. CODE GENERATION FOR VISUAL BAS
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4.3. CODE GENERATION FOR C 89 4.3 C
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4.4. GENERAL ASPECTS OF CODE GENERA
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Chapter 5 Program Examples This cha
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5.2. CAPILLARY VESSEL 95 ÚÐÓ×Û
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5.2. CAPILLARY VESSEL 97 Figure 5.3
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5.3. PARTICLES 99 each. Now it is e
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5.4. ANNUAL RINGS 101 ÚÐÖÛÒÓ
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5.5. BONDING 103 Figure 5.9: Exampl
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5.7. DEVICES 105 Figure 5.11: Calib
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5.7. DEVICES 107 Figure 5.13: Resis
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5.8. CELL WALLS 109 Figure 5.15: Mi
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5.10. EXCEPTION HANDLING 111 Figure
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5.11. ROAD SCENE 113 any case. All
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5.11. ROAD SCENE 115 tures. Hence a
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Chapter 6 Miscellaneous This chapte
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6.5. RESTRICTIONS 119 Figure 6.1: E
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2 APPENDIX A. CONTROL ÌÙÔÐ½
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4 APPENDIX A. CONTROL Attention For
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6 APPENDIX A. CONTROL Result retur
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8 APPENDIX A. CONTROL ÚÙÔØÛÒ
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10 APPENDIX A. CONTROL HDevelop / 2
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12 APPENDIX B. DEVELOP Attention If
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14 APPENDIX B. DEVELOP Ú ÓÔÒ Û
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16 APPENDIX B. DEVELOP Ú Ò×ÔØ
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18 APPENDIX B. DEVELOP Parallelizat
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20 APPENDIX B. DEVELOP º ÀØ (inp
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22 APPENDIX B. DEVELOP ’black’
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24 APPENDIX B. DEVELOP Parameter º
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26 APPENDIX B. DEVELOP Parameter º
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28 APPENDIX B. DEVELOP If ÊÓÛ½
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30 APPENDIX B. DEVELOP Ú ×Ø ÛÒ
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32 APPENDIX B. DEVELOP Possible Suc
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34 APPENDIX B. DEVELOP See Also Ú
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36 APPENDIX B. DEVELOP HDevelop / 2
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38 APPENDIX C. GLOSSARY Operator wi
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40 Index Ú ×Ø ÔÖØ, 27, 39 Ú
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42 Index Operator Data base, 37 Nam
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44 Index HDevelop / 2000-11-16
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HDevelop User's Manual

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