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POnumpy array is shown incorrect with pyglet
 

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  1. POnumpy array is shown incorrect with pyglet
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    <p>I have problems with displaying a numpy array with pyglet. I have found a very similar topic (<a href="https://stackoverflow.com/questions/3165379/how-to-display-a-numpy-array-with-pyglet">how to display a numpy array with pyglet?</a>) that I used. I want to display the array in greyscale, but pyglet displays it with colours see the image: <a href="https://i.stack.imgur.com/pL6Yr.jpg" rel="nofollow noreferrer">http://i.stack.imgur.com/pL6Yr.jpg</a></p> <pre><code>def create(self, X,Y): IMG = random((X,Y)) * 255 self.IMG = dstack((IMG,IMG,IMG)) return self.IMG def image(self): self.img_data = self.create(X,Y).data.__str__() self.image = pyglet.image.ImageData(X,Y, 'RGB', self.img_data, pitch = -X*3) return self.image </code></pre> <p>If I save and load the array instead it works (but it is horrobly slower):</p> <pre><code>def image(self): self.im_save=scipy.misc.toimage(self.create(X,Y),cmin=0, cmax=255) self.im_save.save('outfile.png') self.image = pyglet.image.load('outfile.png') return self.image </code></pre> <p>And I get what I wanted:</p> <p>i.stack.imgur.com/FCY1v.jpg</p> <p>I can't find the mistake in the first code example :(</p> <p><strong>EDIT:</strong></p> <p>Many thanks for your answers. With the hint from Bago I got this to code to work :) And indeed nfirvine suggestion is reasonable, since I only want to display the matrix in greyscale.</p> <pre><code>def create(self, X,Y): self.IMG = (random((X,Y)) * 255).astype('uint8') return self.IMG def image(self): self.img_data = self.create(X,Y).data.__str__() self.image = pyglet.image.ImageData(X,Y, 'L', self.img_data) return self.image </code></pre>
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    1. COIn the `create` method, `X` and `Y` are local variables, but in image they are globals that are not defined in your listing.
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    2. COYour methods should not set an instance variable and then return it. If it's returning something, it shouldn't be an instance variable, since that variable is accessible through `self` anyway.
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