HDevelop User's Manual

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60 CHAPTER 3. LANGUAGE In the above example the operator Ö Ñ has one output parameter for iconic objects (ÁÑ) and one input control parameter (filename). Ö ÒØÖ accepts regions as input (iconic) and three control parameters as output (Ö, ÊÓÛ, ÓÐÙÑÒ). The filter operator ÑÒ Ñ has one iconic parameter as input and one as output. Its two input control parameters specify the size of the filter mask. Input control parameters can either be variables, constants or even complex expressions. An expression is evaluated before it is passed to a parameter that receives the result of the evaluation. Since iconic objects always are represented by variables all iconic parameters only accept variables. Control output parameters must always contain variables, too, as they store the results of an operator evaluation. 3.2 Control Types and Constants All non-iconic data is represented by so called control data (numerical/string) in HDevelop. The name is derived from their respective functions within HALCON operators where they control the behaviour (the effect) of image processing operators (e.g., thresholds for a segmentation operator). Control parameters in HDevelop may contain arithmetic or logical operations. A control data item can be of one of the following types: ÒØÖ, ÖÐ, ÓÓÐÒ, and×ØÖÒ. ÒØÖ and ÖÐ The types ÒØÖ and ÖÐ are used under the same syntactical rules as in C. Integer numbers can be input in the standard decimal notation, in hexadecimal by prefixing the number with ¼Ü, and in octal by prefixing the number with ¼. For example: ½½ ¹½¾¿ ¼Ü½¾ ¼¿¾½ ¿º½ ¼º¿¾¾½ º ¹½º¿¾¹½¾¾ ¿¾½ Data items of type ÒØÖ or ÖÐ are converted to their machine-internal representations: ÖÐ becomes the C-type ÓÙÐ (8 bytes) and ÒØÖ becomes the C-type ÐÓÒ (4 or 8 bytes). ×ØÖÒ A String (×ØÖÒ) is a sequence of characters that is enclosed in single quotes (³). The maximum string length is limited to 1024 characters. Special characters, like the line feed, are represented in the C-like notation, as you can see in table 3.2 (see the reference of the C language for comparison). Examples of strings are shown in table 3.3. HDevelop / 2000-11-16
3.2. CONTROL TYPES AND CONSTANTS 61 Meaning Abbreviation Notation line feed ÆÄ (Ä) Ò horizontal tabulator ÀÌ Ø vertical tabulator ÎÌ Ú backspace Ë carriage return Ê Ö form feed bell Ä backslash single quote ³ ³ Table 3.2: Surrogates for special characters String ³ÀÙÓ³ ³½¼º³ ³ÌÜØºººÒ³ ³Ø ÌÜØ½ Ø ÌÜØ¾³ ³ËÓÐ³× ¹ÐØÖ³ ³ÈÖÓÖÑ×ÅÎÌÀÐÓÒÑ×³ Meaning letters numbers (not ÖÐ) ÆÄ at the end of the string twotabsinatext single quote within the text Directory Table 3.3: String examples ÓÓÐÒ The constants ØÖÙ and Ð× belong to the type ÓÓÐÒ. ThevalueØÖÙ is internally represented by the number 1 and the value Ð× by 0. This means, that in the expression ÎÐ ØÖÙ the effective value of ÎÐ is set to 1. In general, every integer value 0 means ØÖÙ. Please note that some HALCON operators take logical values for input (e.g., ×Ø ×Ý×ØÑ). In this case the HALCON operators expect string constants like ³ØÖÙ³ or ³Ð×³ rather than the represented values ØÖÙ or Ð×. constants There are constants for the return value (result state) of an operator. The constants can be used together with the operator Ú ÖÖÓÖ ÚÖ and Ú ×Ø . These constants represent the normal return value of an operator, so called messages. For errors no constants are available 1 . Constant Meaning Value ÀÅËÌÊÍ No error; for tests: (ØÖÙ) 2 ÀÅËÄË For tests: Ð× 3 ÀÅËÎÇÁ No result could be computed 4 ÀÅËÁÄ Operator did not succeed 5 Table 3.4: Return values for operators In table 3.4 all return messages can be found. 1 There exist more than 400 error numbers internally (see Extension Package Programmer’s Manual). HALCON 6.0
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HALCON Version 6.0 MVTec Software G
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About This Manual This manual is a
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Contents 1 Introducing HDevelop 1 1
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Contents iii comment . . . . . . .
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Chapter 1 Introducing HDevelop In f
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1.2. EXAMPLE SESSION 3 Figure 1.1:
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1.2. EXAMPLE SESSION 5 Figure 1.2:
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1.3. ADDITIONAL SOURCES OF INFORMAT
Page 17 and 18: Chapter 2 Graphical User Interface
Page 19 and 20: 2.3. MAIN WINDOW 11 Figure 2.1: The
Page 21 and 22: 2.3. MAIN WINDOW 13 A security chec
Page 23 and 24: 2.3. MAIN WINDOW 15 a directory whe
Page 25 and 26: 2.3. MAIN WINDOW 17 Figure 2.7: The
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Page 31 and 32: 2.3. MAIN WINDOW 23 2.3.2.4 The Men
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Page 35 and 36: 2.3. MAIN WINDOW 27 in a graphics w
Page 37 and 38: 2.3. MAIN WINDOW 29 Figure 2.16: On
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Page 43 and 44: 2.3. MAIN WINDOW 35 Figure 2.20: Se
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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×
Page 53 and 54: 2.3. MAIN WINDOW 45 ÏÒÓÛ º ×
Page 55 and 56: 2.3. MAIN WINDOW 47 Figure 2.31: Th
Page 57 and 58: 2.5. OPERATOR WINDOW 49 The program
Page 59 and 60: 2.5. OPERATOR WINDOW 51 Please refe
Page 61 and 62: 2.6. VARIABLE WINDOW 53 operator ha
Page 63 and 64: 2.6. VARIABLE WINDOW 55 aspect rati
Page 65 and 66: 2.7. GRAPHICS WINDOW 57 Figure 2.38
Page 67: Chapter 3 Language The following ch
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Page 85 and 86: 3.6. RESERVED WORDS 77 ÓÖ, ÜÓÖ
Page 87 and 88: 3.8. LIMITATIONS 79 In the followin
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Page 91 and 92: 4.1. CODE GENERATION FOR C++ 83 Ì
Page 93 and 94: 4.1. CODE GENERATION FOR C++ 85 tha
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Page 97 and 98: 4.3. CODE GENERATION FOR C 89 4.3 C
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Page 103 and 104: 5.2. CAPILLARY VESSEL 95 ÚÐÓ×Û
Page 105 and 106: 5.2. CAPILLARY VESSEL 97 Figure 5.3
Page 107 and 108: 5.3. PARTICLES 99 each. Now it is e
Page 109 and 110: 5.4. ANNUAL RINGS 101 ÚÐÖÛÒÓ
Page 111 and 112: 5.5. BONDING 103 Figure 5.9: Exampl
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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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