PixelAccess Class

The PixelAccess class provides read and write access toPIL.Image data at a pixel level.

注解

Accessing individual pixels is fairly slow. If you are looping over all of the pixels in an image, there is likely a faster way using other parts of the Pillow API.

Example

The following script loads an image, accesses one pixel from it, thenchanges it.

from PIL import Image
im = Image.open('hopper.jpg')
px = im.load()
print (px[4,4])
px[4,4] = (0,0,0)
print (px[4,4])

Results in the following:

(23, 24, 68)
(0, 0, 0)

PixelAccess Class

• class PixelAccess
• • setitem(self, xy, color):
  • Modifies the pixel at x,y. The color is given as a singlenumerical value for single band images, and a tuple formulti-band images

参数:

- **xy** – The pixel coordinate, given as (x, y).
- **value** – The pixel value.

• getitem(self, xy):
• • Returns the pixel at x,y. The pixel is returned as a single
  • value for single band images or a tuple for multiple bandimages

param xy:The pixel coordinate, given as (x, y).returns:a pixel value for single band images, a tuple ofpixel values for multiband images.

• putpixel(self, xy, color):
• Modifies the pixel at x,y. The color is given as a singlenumerical value for single band images, and a tuple formulti-band images

参数:

- **xy** – The pixel coordinate, given as (x, y).
- **value** – The pixel value.

• getpixel(self, xy):
• • Returns the pixel at x,y. The pixel is returned as a single
  • value for single band images or a tuple for multiple bandimages

param xy:The pixel coordinate, given as (x, y).returns:a pixel value for single band images, a tuple ofpixel values for multiband images.