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How to calculate absolute difference between two images using opencv and python?
Thanks in advance.
We'll assume that the two images are of the same size. Then, you can try this:
import cv2
import numpy as np
img1 = cv2.imread('path/to/img1')
img2 = cv2.imread('path/to/img2')
np.abs(img1, img2)
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How do I read an image file and decode it using Python?
The word "read" is vague, but here is an example which reads a jpeg file using the Image class, and prints information about it.
from PIL import Image
jpgfile = Image.open("picture.jpg")
print(jpgfile.bits, jpgfile.size, jpgfile.format)
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I used machine learning to cut out a portrait, but the result was a portrait, not a grayscale map, how do I convert it to a grayscale map? I want background is black and portrait is white
You can use skimage library to simply convert RGB to GrayScale image.
from skimage import color
from skimage import io
origImage = io.imread('your_image_path')
gsImage = color.rgb2gray(origImage)
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I am created some chess program and want to detect who have move white or black. Which objects stores information which pieces will move Board, GameNode?
import chess.pgn
import chess.uci
# ??? Board().is_white_move()?
# ??? GameNode.is_white_move()?
I analysed code but not found good explanation.
I assume that you are looking at python-chess.
There's a turn attribute of the Board instance.
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In Python, how can I rotate an array with 20,40,60,..200 degree? Actually, this array contains fits image and I want to rotate this fits image. I know that I can rotate image, but this image is in form of array.
Thanks in advance!
Cheers,
-Viral
Did you try this?
scipy.ndimage.interpolation.rotate()
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Is there any simple way for converting PNG to PBM?
ocrad requires PBM image, not PNG.
Check out Pillow. According to the docs, it supports PBM, PGM, and PPM formats out of the box. The following code should get you started:
from PIL import Image
im = Image.open("myfile.png")
im.save("myfile.pbm")