Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!
Comments¶
PIL.ImageGrab works on macOS and Windows only.
You can further crop a screenshot image using the method
Image.crop.
import numpy as np
from PIL import Image, ImageFilterimg = Image.open("../../home/media/poker/4h.png")
img
ImageFilter.BLUR¶
The BLUR filter blurs an image.
img.filter(ImageFilter.BLUR)
ImageFilter.MinFilter¶
The MinFilter takes the minimum value of the specified neighborhood for each pixle. The direct effect is to make lines thicker in an image. The MaxFilter is also refer to as erosion.
img.filter(ImageFilter.MinFilter(3))
Or equivalently,
img.filter(ImageFilter.MinFilter)ImageFilter.MaxFilter¶
The MaxFilter takes the maximum value of the specified neighborhood for each pixle. The direct effect is to make lines thinner in an image. The MaxFilter is also refer to as dilation.
img.filter(ImageFilter.MaxFilter)
ImageFilter.ModeFilter¶
The ModeFilter takes the mode value of the specified neighborhood for each pixle. The direct effect is to makes thin lines disappear.
img.filter(ImageFilter.ModeFilter)
ImageFilter.CONTOUR¶
The CONTOUR filter gets contours of objects in an image.
img.filter(ImageFilter.CONTOUR)
ImageFilter.DETAIL¶
img.filter(ImageFilter.DETAIL)
ImageFilter.EDGE_ENHANCE¶
img.filter(ImageFilter.EDGE_ENHANCE)
ImageFilter.EDGE_ENHANCE_MORE¶
img.filter(ImageFilter.EDGE_ENHANCE_MORE)
ImageFilter.EMBOSS¶
img.filter(ImageFilter.EMBOSS)
ImageFilter.FIND_EDGES¶
img.filter(ImageFilter.FIND_EDGES)
ImageFilter.SHARPEN¶
img.filter(ImageFilter.SHARPEN)
ImageFilter.SMOOTH¶
img.filter(ImageFilter.SMOOTH)
ImageFilter.SMOOTH_MORE¶
img.filter(ImageFilter.SMOOTH_MORE)