1
我试图把一个或三个通道的2D图像,并使用vtkImageActor
在VTK中显示它们。据我所知,要显示的当前帧可通过调用SetImageData
vtkImageActor
并提供vtkImageData
的实例来更新。numpy uint8_t数组到vtkImageData
我已经设置了我的visualiser,如下所示。但是,我不确定如何从numpy数组构建vtkImageData
对象(这将在updateFrames
方法中进行)。我numpy阵列的类型是np.uint8_t
。
我使用VTK8.0,Python的3.6和numpy的1.13.1
class VTKStreamVisualiser:
def __init__(self, displayRGB):
self.__displayRGB = displayRGB
self.__started = False
#Setup window.
self.__renderWindow = vtk.vtkRenderWindow()
self.__renderWindowInteractor = vtk.vtkRenderWindowInteractor()
self.__renderWindowInteractor.SetRenderWindow(self.__renderWindow)
#To store renderers and actors.
self.__renderers = []
self.__actors = []
#Initialise to None to check if ready when invoking start()
self.__depthImageData = None
self.__rgbImageData = None
#Determine viewport ranges for depth and setup renderer.
xMinDepth = 0.0
xMaxDepth = 0.5 if displayRGB else 1.0
yMin = 0.0
yMax = 1.0
self.__setupRenderer(xMinDepth, yMin, xMaxDepth, yMax)
#Determine viewport ranges for rgb and setup renderer.
if self.__displayRGB:
xMinRGB = xMaxDepth
xMaxRGB = 2.0 * xMinRGB
self.__setupRenderer(xMinRGB, yMin, xMaxRGB, yMax)
def __setupRenderer(self, xMin, yMin, xMax, yMax):
#Setup renderer.
self.__renderers.append(vtk.vtkRenderer())
idx = len(self.__renderers) - 1
self.__renderWindow.AddRenderer(self.__renderers[idx])
self.__renderers[idx].SetViewport(xMin, yMin, xMax, yMax)
self.__actors.append(vtk.vtkImageActor())
self.__renderers[idx].AddActor(self.__actors[idx])
self.__renderers[idx].ResetCamera()
def start(self):
self.__depthImageData is None or (self.__rgbImageData is None and self.__displayRGB):
return None
if self.__started:
return
self.__renderWindowInteractor.Initialize()
self.__renderWindow.Render()
self.__renderWindowInteractor.Start()
self.__started = True
def stop(self):
if not self.__started:
return
self.__renderWindowInteractor.Stop()
self.__renderWindow.Finalize()
self.__renderWindowInteractor.TerminateApp()
self.__started = False
def updateFrames(self, depthFrame, rgbFrame=None):
#Build vtkImageData here from the given numpy uint8_t arrays.
pass
编辑:我知道我可以手动复制了作为证明here数据,这将不会是太坏使用Cython(假设我能够在Cython中使用vtkImageData
),但是最好直接使用numpy数组。
非常感谢你的工作示例。 –