Morph-M Python - Creation and Deletion » History » Version 3
Serge Koudoro, 10/26/2009 01:57 PM
1 | 2 | Serge Koudoro | h1. *Morph-M Python - Creation and Deletion* |
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2 | 1 | Serge Koudoro | |
3 | h3{color:#8B0000}. +Creation...+ |
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4 | |||
5 | Images can either be created by type and size. |
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6 | |||
7 | <pre><code class="ruby"> |
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8 | im=createImage(dataCategory.dtScalar,scalarDataType.sdtUINT8) |
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9 | im.setSize(256,256) |
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10 | im.allocateImage() |
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11 | </code></pre> |
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12 | |||
13 | which type and size are this following value: |
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14 | |||
15 | * *Type*: _sdtINT8, sdtINT16, sdtINT32, sdtINT64, sdtUINT8, sdtUINT16, sdtUINT32, sdtUINT64, sdtFloat, sdtDouble, sdtBIT, sdtOffset, sdtLabel, sdtSTR, sdtObject, sdtCompound, sdtList, sdtMap, sdtPair_. |
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16 | * *size*: _dtScalar, dtAngular, dtComplex, dtPixel3, dtPixel4, dtOffsetList, dtPointer, dtArray, dtImage, dtNeighborhood, dtVariant, dtCVariant_. |
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17 | |||
18 | h3{color:#8B0000}. +Load from file...+ |
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19 | |||
20 | Images can be loaded from a file, and can be write to a file |
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21 | |||
22 | <pre><code class="ruby"> |
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23 | im2=pngFileRead("foo.png") |
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24 | im2=bmpFileRead("foo.bmp") |
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25 | im2=csvFileRead("foo.csv") |
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26 | im2=jpegFileRead("foo.jpg") |
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27 | pngFileWrite(im2,"foo.png") |
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28 | bmpFileWrite(im2,"foo.bmp") |
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29 | csvFileWrite(im2,"foo.csv") |
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30 | jpegFileWrite(im2,"foo.jpg") |
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31 | #generic function |
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32 | im2=fileRead("foo.png") |
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33 | fileWrite(im2, "foo.jpg") |
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34 | </code></pre> |
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35 | |||
36 | PNG is the best supported format. |
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37 | |||
38 | h3{color:#8B0000}. +Features...+ |
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39 | |||
40 | Images are Python objects and as such are reference-counted and automatically destroyed when leaving the scope. This code does not leak memory: |
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41 | |||
42 | <pre><code class="ruby"> |
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43 | while 1: |
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44 | 3 | Serge Koudoro | im=pngFileRead("hop.png") |
45 | 1 | Serge Koudoro | |
46 | </code></pre> |
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47 | |||
48 | Images are passed and copied by reference: |
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49 | |||
50 | <pre><code class="ruby"> |
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51 | im2=im1 |
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52 | ImSetConstant(im1,255) |
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53 | for pixel in im2: |
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54 | 3 | Serge Koudoro | print pixel |
55 | 1 | Serge Koudoro | </code></pre> |
56 | |||
57 | The second image is also put to 255. A new image can be created by using getSame and ImCopy: |
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58 | |||
59 | <pre><code class="ruby"> |
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60 | im2=im1.getSame() #or im2=ImCreateSame(im1) |
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61 | im3=im1.ImCreateSame(im1, "UINT16") #changing image type |
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62 | ImCopy(im1,im2) |
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63 | ImSetConstant(im1,255) |
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64 | for pixel in im2: |
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65 | 3 | Serge Koudoro | print pixel |
66 | 1 | Serge Koudoro | </code></pre> |
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68 | The second image will have kept its values even while the first is uniformally set to 255. |