[英]Display image in Grayscale using vispy
i'm working with a spatial light modulator (SLM) which is connected as a second monbitor.我正在使用作为第二个监视器连接的空间光调制器 (SLM)。 The SLM has tzo recive 8-bit grayscale images.
SLM 具有 tzo 接收 8 位灰度图像。 I am currently working with vispy to display the images on the SLM, but i'm not shore if they are diplayed correctly.
我目前正在使用 vispy 在 SLM 上显示图像,但如果它们正确显示,我就不会支持。 Is there any possibility to display an image on grayscale using vispy?
是否有可能使用 vispy 以灰度显示图像?
I disply the images using this code我使用此代码显示图像
import sys
from vispy import scene
from vispy import app
import numpy as np
canvas = scene.SceneCanvas(keys='interactive')
canvas.size = 800, 600
canvas.show()
# Set up a viewbox to display the image with interactive pan/zoom
view = canvas.central_widget.add_view()
# Create the image
img_data = *my image*
image = scene.visuals.Image(img_data, parent=view.scene)
# Set 2D camera (the camera will scale to the contents in the scene)
view.camera = scene.PanZoomCamera(aspect=1)
if __name__ == '__main__' and sys.flags.interactive == 0:
app.run()
from http://vispy.readthedocs.io/en/stable/examples/basics/scene/image.html来自http://vispy.readthedocs.io/en/stable/examples/basics/scene/image.html
thanks for your help, and sorry for bad english感谢您的帮助,抱歉英语不好
You can transform your picture from RGB to gray (see this post ) and then use the 'grays' colormap.您可以将图片从 RGB 转换为灰色(请参阅此帖子),然后使用“灰色”颜色图。
import sys
from vispy import scene
from vispy import app
import numpy as np
from vispy.io import load_data_file, read_png
canvas = scene.SceneCanvas(keys='interactive')
canvas.size = 800, 600
canvas.show()
# Set up a viewbox to display the image with interactive pan/zoom
view = canvas.central_widget.add_view()
# Define a function to tranform a picture to gray
def rgb2gray(rgb):
return np.dot(rgb[...,:3], [0.299, 0.587, 0.114])
# Load the image
img_data = read_png(load_data_file('mona_lisa/mona_lisa_sm.png'))
# Apply transformation
img_data = rgb2gray(img_data)
# Image visual
image = scene.visuals.Image(img_data, cmap='grays', parent=view.scene)
# Set 2D camera (the camera will scale to the contents in the scene)
view.camera = scene.PanZoomCamera(aspect=1)
view.camera.set_range()
view.camera.flip = (0, 1, 0)
if __name__ == '__main__' and sys.flags.interactive == 0:
app.run()
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