import numpy as np
from scipy import signal
from opencv import adaptors
class scipyFromOpenCV(object):
"""This decorator can be used to wrap a function that takes
and returns a numpy array into one that takes and retuns an
opencv CvMat.
"""
def __init__(self, f):
self.f = f
def __call__(self, image):
# Convert CvMat to ndarray
np_image = adaptors.Ipl2NumPy(image)
# Call the original function
np_image_filtered = self.f(np_image)
# Convert back to CvMat
return adaptors.NumPy2Ipl(np_image_filtered)
@scipyFromOpenCV
def slowGaussianBlur(matrix):
"""Manual gaussian blur - Very very very slow!"""
filterSize = 3
filt = gauss_kern(filterSize)
r = signal.convolve(matrix[:,:,0],filt,'same')
g = signal.convolve(matrix[:,:,1],filt,'same')
b = signal.convolve(matrix[:,:,2],filt,'same')
result = array([r,b,g]).astype(uint8).transpose((1,2,0))
return result
The official django tutorial is very good, it stops short of displaying
data with matplotlib - which could be very handy for dsp or automated
testing. This is an extension to the tutorial. So first you must do the
official tutorial!
Complete the tutorial (as of writing this up to part 4).
Adding an image to a view
To start with we will take a static image from the hard drive and
display it on the polls index page.
Usually if it really is a static image this would be managed by the
webserver eg apache. For introduction purposes we will get django to
serve the static image. To do this we first need to change the
template.
Change the template
At the moment poll_list.html probably looks something like this:
<h1>Django test app - Polls</h1> {% if object_list %} <ul> {% for object in object_list %} <li><a href="/polls/{{object.id}}">{{ object.question }}</a></li> {% endfor %} </ul> {% else %} <p>No polls are available.</p> …
data with matplotlib - which could be very handy for dsp or automated
testing. This is an extension to the tutorial. So first you must do the
official tutorial!
Complete the tutorial (as of writing this up to part 4).
Adding an image to a view
To start with we will take a static image from the hard drive and
display it on the polls index page.
Usually if it really is a static image this would be managed by the
webserver eg apache. For introduction purposes we will get django to
serve the static image. To do this we first need to change the
template.
Change the template
At the moment poll_list.html probably looks something like this:
<h1>Django test app - Polls</h1> {% if object_list %} <ul> {% for object in object_list %} <li><a href="/polls/{{object.id}}">{{ object.question }}</a></li> {% endfor %} </ul> {% else %} <p>No polls are available.</p> …
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