问题描述
我有一些数据,它由几个2D图像,我想具体[X,Y,Z]渲染的位置相对于利用彼此 mayavi2(V4.3.0)
。
从文档似乎我应该能够与 mlab.imshow做到这一点()
。不幸的是,Mayavi中抛出当我打电话异常 imshow
指定范围
参数( AttributeError异常: ImageActor'对象有没有属性'演员'
)。
我还试图通过修改 im.mlab_source.x,Y,Z ...
直接设置x,y和z数据。古怪,而这正确地改变x和y的范围,它什么都不做的z位置,即使 im.mlab_source.z
明确改变。
下面是一个可运行的例子:
进口numpy的为NP
从scipy.misc进口莉娜
从Mayavi的进口MLAB
高清normal_imshow(IMG =莉娜()):
返回mlab.imshow(IMG,颜色表=灰色)
高清set_extent(IMG =莉娜()):
返回mlab.imshow(IMG,程度= [0,100,0,100,50,50],颜色表=酷)
高清set_xyz(IMG =莉娜()):
IM = mlab.imshow(IMG,颜色表=热)
SRC = im.mlab_source
打印老Z:,src.z
src.x = 100 *(src.x - src.x.min())/(src.x.max() - src.x.min())
src.y = 100 *(src.y - src.y.min())/(src.x.max() - src.y.min())
src.z [:] = 50
打印新的z:,src.z
回报IM
如果__name__ =='__main__':
#这个工程
normal_imshow()
##失败(AttributeError异常)
#set_extent()
#古怪,这似乎工作的x和y轴,但不改变
#在Z-现在的位置,即使data.z不改变
set_xyz()
好吧,事实证明,这是一个的。然而,这是可以改变的 ImageActor
对象的方向,位置和比例,已经创建后:
OBJ = mlab.imshow(IMG)
obj.actor.orientation = [0,0,0]#所需方向
obj.actor.position = [0,0,0]#所需位置
obj.actor.scale = [0,0,0]#所需规模
I have some data that consists of several 2D images that I would like to render in specific [x,y,z] positions relative to one another using mayavi2 (v4.3.0)
.
From the documentation it seems that I should just be able to do this with mlab.imshow()
. Unfortunately, mayavi throws an exception when I call imshow
specifying the extent
parameter (AttributeError: 'ImageActor' object has no attribute 'actor'
).
I also tried setting the x,y and z data directly by modifying im.mlab_source.x,y,z...
. Weirdly, whilst this correctly changes the x and y extents, it does nothing to the z-position even though im.mlab_source.z
clearly changes.
Here's a runnable example:
import numpy as np
from scipy.misc import lena
from mayavi import mlab
def normal_imshow(img=lena()):
return mlab.imshow(img,colormap='gray')
def set_extent(img=lena()):
return mlab.imshow(img,extent=[0,100,0,100,50,50],colormap='cool')
def set_xyz(img=lena()):
im = mlab.imshow(img,colormap='hot')
src = im.mlab_source
print 'Old z :',src.z
src.x = 100*(src.x - src.x.min())/(src.x.max() - src.x.min())
src.y = 100*(src.y - src.y.min())/(src.x.max() - src.y.min())
src.z[:] = 50
print 'New z :',src.z
return im
if __name__ == '__main__':
# this works
normal_imshow()
# # this fails (AttributeError)
# set_extent()
# weirdly, this seems to work for the x and y axes, but does not change
# the z-postion even though data.z does change
set_xyz()
Ok, it turns out that this is a known bug in mayavi. However, it is possible to change the orientation, position and scale of an ImageActor
object after it has been created:
obj = mlab.imshow(img)
obj.actor.orientation = [0, 0, 0] # the required orientation
obj.actor.position = [0, 0, 0] # the required position
obj.actor.scale = [0, 0, 0] # the required scale
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