I want to try view the image using spyder python as in:
skydrive share the image is:
- uint16 (10-bit)
- width:1376 pixel, height: 960 pixel
- no header
- bayer pattern blue-green, green-red
What python script is suitable?
Thanks.
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Please have a try on this first and post the code snippet or error if you are facing some issueRinoTom– RinoTom2013-02-25 14:35:00 +00:00Commented Feb 25, 2013 at 14:35
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Look herewill– will2013-02-25 15:22:29 +00:00Commented Feb 25, 2013 at 15:22
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also note that this is about "image processing" not about the "processing" programming language.Mike 'Pomax' Kamermans– Mike 'Pomax' Kamermans2013-02-25 16:25:19 +00:00Commented Feb 25, 2013 at 16:25
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You could split this into 3 or 4 steps and each would be a question on its own. 1) How to read the image. 2) Bayer demosaicing. 3) Converting from a linear colorspace to something gamma corrected such as sRGB. 4) Applying white balance or color correction.Mark Ransom– Mark Ransom2013-02-25 18:10:27 +00:00Commented Feb 25, 2013 at 18:10
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this is what I get from [link]kyb.tuebingen.mpg.de/?id=227 <!-- language: lang-none --> fin = open('001.raw', 'rb') s = fin.read() fin.close() arr = array.array('H', s) arr.byteswap() img = numpy.array(arr, dtype='uint16').reshape(960,1376) imshow(img, gray());bahgia minhat– bahgia minhat2013-02-26 15:58:16 +00:00Commented Feb 26, 2013 at 15:58
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1 Answer
Here is one way.
Start with imports
from matplotlib import pyplot as plt
import numpy as np
Now allocate the space
image = np.empty((1376,960), np.uint16)
Read the image into your array:
image.data[:] = open('20_1-20ms.raw').read()
Display it:
plt.imshow(image)
2 Comments
KDN
As far as I can tell, this doesn't work on color data (i.e., a stack of 3 images, one for each color). Matplotlib's imshow requires either floats or int8s to produce a reasonable RGB image. Attempting to call it with int16s will produce garbled noise. You must either bitshift your 10 bit data to 8 bit data, or convert to float e.g., im_float = im_int / (2**10 - 1.).
Raiyan Chowdhury
I tried this out to read a .raw file but I'm getting this error: NotImplementedError: memoryview slice assignments are currently restricted to ndim = 1.