cmake VTK:<\/strong><\/p>\n To develop a filter plugin, you must have a version of VTK is compiled and source code available.<\/p>\n Install the package libvtk5-dev (Ubuntu: Go to “System-Administration” and start “Synaptic” and select the package) or download the source and compile VTK (do not use version 5.6.1):<\/p>\n http:\/\/www.vtk.org\/files\/release\/5.4\/vtkdata-5.4.2.tar.gz Press the letter C (“Press [c] to configure”) until the following screen options appear:<\/p>\n After, you need to change the value of some compilation variables: place the cursor over the option and enable editing of the value by pressing “enter”:<\/p>\n BUILD_EXAMPLES OFF After, you need to change the value of some compilation variables: place the cursor over the option and enable editing of the value by pressing “enter”.<\/p>\n Then, press the letter “g” to generate makefiles (the control will return to the terminal command)<\/p>\n To compile the VTK: make or make-j2 (compilation generates two threads – the optimal number of threads is based on the number of process colors).<\/p>\n Depending on the configuration of the machine, the compilation may take a while.<\/p>\n <\/p>\n Programming the filter Plugin<\/strong><\/p>\n Download the package with the auxiliary files to build the filter plugin:<\/p>\n http:\/\/hemo01a.lncc.br\/software\/ImageLab_dev\/imPluginFilter.tar.gz<\/em><\/a><\/p>\n In this file there are implementations of the following classes:<\/p>\n imPluginBaseFilter<\/strong>: class “father” of the class that implements the filter plugin;<\/p>\n imPluginFilter<\/strong>: class in which the code that manipulates the pixels to be described – Update method.<\/p>\n This class contains a reference to an object of type vtkImageData (this-> image) that is the image itself.<\/p>\n Other class methods vtkImageData: <\/p>\n Commands to compile the filter plugin:<\/strong><\/p>\n cd imPluginFilter Within the environment of the CCMAKE, manually point the directory path where the compiled VTK (example: home \/ user \/ VTK \/ BUILD) VTK_DIR the variable – if the VTK has been installed packet, the path will be filled automatically.<\/p>\n Generate the\u00a0makefiles\u00a0(using\u00a0the “g”).<\/p>\n Compile the library containing the objects of the filter plugin with the command make.<\/p>\n A library is generated with the following name:\u00a0libImageLabPluginFilter.so<\/strong><\/p>\n <\/p>\n To incorporate the library in ImageLab plugin, type the following command before starting the ImageLab<\/p>\n export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:\/path<\/p>\n Path is the path where the generated file. Is located so.<\/p>\n Methods to be used in programming the filter:<\/strong><\/p>\n Basically, the parameters are passed in vectors of integers and real values for the filter.<\/p>\n Inside the filter class, access to parameters is done through the following methods:<\/p>\n Returns reference to an array of type double with three positions (x, y, z) containing the coordinates of a given seed – returns NULL if the seed is not found: Returns the value of a pixel assigned to a particular seed: Returns the integer parameter (defined in the filter plugin interface) with index given by the parameter paramNumber: Returns the actual parameter (defined in the filter plugin interface) with index given by the parameter paramNumber: Interface filter plugin:<\/strong><\/p>\n The interface is pretty generic and it is intended that in future versions, in addition to the code, the user can also specify interfaces. Examples of codes<\/strong><\/p>\n Example 1:”Hello World”<\/strong><\/p>\n <\/p>\n Example 2: Threshold in terms of pixel value obtained from a seed<\/strong><\/p>\n double<\/span> PixelValue =<\/span> this<\/span>-><\/span>GetSeedPixelValue(<\/span>0<\/span>);<\/span><\/p>\n cout <<<\/span> “Value associated with pixel Seed 0 “<\/span><<<\/span> PixelValue <<<\/span> endl;<\/span><\/p>\n double limiteInf=<\/span> PixelValue;<\/span> \/\/ value obtained from the interface – that lower values are reset<\/span><\/p>\n cout <<<\/span> “Pixel values that are less than “<\/span> <<<\/span> limiteInf <<<\/span> ” will be cleared ” <<\/span><<<\/span> endl;<\/span><\/p>\n for<\/span> (<\/span>int<\/span> y=<\/span>0<\/span>;<\/span> y<<\/span>dims[<\/span>1<\/span>];<\/span> y++)<\/span><\/p>\n {<\/p>\n for<\/span> (<\/span>int<\/span> x=<\/span>0<\/span>;<\/span> x<<\/span>dims[<\/span>0<\/span>];<\/span> x++)<\/span><\/p>\n {<\/p>\n for<\/span> (<\/span>int<\/span> z=<\/span>0<\/span>;<\/span> z<<\/span>dims[<\/span>2<\/span>];<\/span> z++)<\/span><\/p>\n {<\/p>\n double<\/span> CurrentPixelValue =<\/span> image-><\/span>GetScalarComponentAsDouble(<\/span>x,<\/span>y,<\/span>z,<\/span>0<\/span>);<\/span><\/p>\n \/\/ Comparing the current pixel with the first real value<\/p>\n \/\/ Placed at the interface of real parameters<\/p>\n if<\/span> (<\/span>CurrentPixelValue ><\/span> limiteInf)<\/span><\/p>\n image-><\/span>SetScalarComponentFromDouble(<\/span>x,<\/span>y,<\/span>z,<\/span>0<\/span>,<\/span>CurrentPixelValue);<\/span><\/p>\n else<\/p>\n image-><\/span>SetScalarComponentFromDouble(<\/span>x,<\/span>y,<\/span>z,<\/span>0<\/span>,<\/span>0.0<\/span>);<\/span><\/p>\n }<\/p>\n }<\/p>\n }<\/p><\/blockquote>\n
\nccmake
\ng++
\ngcc
\nlibqt4-dev
\nlibqt4-gui
\nlibqtcore4<\/em><\/p><\/blockquote>\n
\ntar -zxvf vtk-5.4.2.tar.gz
\nmkdir VTK_build
\ncd VTK_build
\nccmake ..\/VTK<\/em><\/p><\/blockquote>\n![\"\"](\"..\/wp-content\/uploads\/2014\/10\/plugin_1.jpg\")
<\/p>\n![\"\"](\"..\/wp-content\/uploads\/2014\/10\/plugin_2.jpg\")
<\/p>\n
\nBUILD_SHARED_LIBS ON
\nBUILD_TESTING OFF<\/em><\/p><\/blockquote>\n
\nhttp:\/\/www.vtk.org\/doc\/nightly\/html\/classvtkImageData.html<\/a><\/p>\n
\nmkdir build
\ncd build
\nccmake ..\/<\/em><\/p><\/blockquote>\n
\ndouble *GetSeed(int seedNumber);<\/strong><\/p>\n
\ndouble GetSeedPixelValue(int seedNumber);<\/strong><\/p>\n
\nint GetIntParam(int paramNumber);<\/strong><\/p>\n
\ndouble GetDoubleParam(int paramNumber);<\/strong><\/p>\n
\nIn the figure below, one can see that there are basically three parameter fields:
\nThe first field is for integer parameters (these must be separated by a semicolon);
\nThe second field is for real and these parameters should also be separated by a semicolon;
\nThe last field specifies the seeds (seeds) “placed” in the image.<\/p>\n![\"\"](\"..\/wp-content\/uploads\/2014\/10\/plugin_3.jpg\")
<\/strong><\/p>\ncout << \"Image with the following characteristics: \" << endl; \r\ncout << \"Number of dimensions of the image \"<< image->GetDataDimension() << endl;\r\n\r\ndouble* spacing = image->GetSpacing();\r\n\r\ncout << \"width -x: \"<< spacing[0] << endl;\r\ncout << \"height -y: \"<< spacing[1] << endl;\r\ncout << \"length -z: \"<< spacing[2] << endl;\r\n\r\nint* dims = image->GetDimensions(); \/\/ get the size of the image array, x, y, z\r\n\r\ncout << \"planos em x: \"<< dims[0] << endl;\r\ncout << \"planos em y: \"<< dims[1] << endl;\r\ncout << \"planos em z: \"<< dims[2] << endl;<\/pre>\n
![\"\"](\"..\/wp-content\/uploads\/2014\/10\/TUT_PDF1.png\")
<\/a><\/p>\n![\"\"](\"..\/wp-content\/uploads\/2014\/08\/back.gif\")
<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"