Convert image to a matrix in python
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Convert image to a matrix in python
提问by hatmatrix
I want to do some image processing using Python.
I want to do some image processing using Python.
Is there a simple way to import .pngimage as a matrix of greyscale/RGB values (possibly using PIL)?
Is there a simple way to import .pngimage as a matrix of greyscale/RGB values (possibly using PIL)?
采纳答案by ptomato
scipy.misc.imread()will return a Numpy array, which is handy for lots of things.
scipy.misc.imread()will return a Numpy array, which is handy for lots of things.
回答by Nikolaus Gradwohl
you can use PyGame imageand use PixelArrayto access the pixeldata
you can use PyGame imageand use PixelArrayto access the pixeldata
回答by Salvador Dali
Up till now no one told about matplotlib.image:
Up till now no one told about matplotlib.image:
import matplotlib.image as img
image = img.imread(file_name)
Now the image would be a 3D numpy array
Now the image would be a 3D numpy array
print image.shape
Would be something like: (317, 504, 3)
Would be something like: (317, 504, 3)
回答by anon
scipy.misc.imread()is deprecated now. We can use imageio.imreadinstead of that to read it as a Numpy array
scipy.misc.imread()is deprecated now. We can use imageio.imreadinstead of that to read it as a Numpy array
回答by FellerRock
Definitely try
Definitely try
from matplotlib.image import imread
image = imread(filename)
The filename preferably has to be an .jpgimage. And then, try
The filename preferably has to be an .jpgimage. And then, try
image.shape
This would return :
This would return :
for a black and white or grayscale imageAn (n,n)matrix where n represents the dimension of the images (pixels) and values inside the matrix range from 0 to 255. Typically 0 is taken to be black, and 255 is taken to be white. 128 tends to be grey!
For color or RGB imageIt will render a tensor of 3 channels. Each channel is an (n,n)matrix where each entry represents the respectively the level of Red, Green or Blue at the actual location inside the image.
for a black and white or grayscale imageAn (n,n)matrix where n represents the dimension of the images (pixels) and values inside the matrix range from 0 to 255. Typically 0 is taken to be black, and 255 is taken to be white. 128 tends to be grey!
For color or RGB imageIt will render a tensor of 3 channels. Each channel is an (n,n)matrix where each entry represents the respectively the level of Red, Green or Blue at the actual location inside the image.
