Python image Processing!

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Third, some basic operation of the image

1. Output picture information (format, size and image type)

4. Rotate the picture

To rotate an image, you can use a counterclockwise representation of the rotation angle, and then call the Rotate () method:

After 45 degrees of rotation, it will be filled with the same size.

Rorate2:

Note: Only choose 90 degrees, 180 degrees and 270 degrees to use Img.transpose (image.rotate_90), other angles with ROTATE

Rorate4:

6. Zoom image

To adjust the size of an image, we can call the Resize () method. The parameter for this method is a tuple that specifies the size of the new image:

After running:

9. Cropping a picture

Use the crop () method to crop a specified area from an image:

1. # coding=utf-8

2. from PIL importImage

4. # 读取图片

5. img =Image.open(‘qq_image.jpg‘)

7. # 裁剪图片 box为裁剪图片的区域范围

8. box =(100,100,250,250)

9. region = img.crop(box)

10. region.show()

Run output:

Note: python specifies that the upper-left corner is a coordinate point (0, 0), and that the box is defined by a 4-tuple (left, top, right, bottom), represented as coordinates: (Ieft, Upper, R, Lower), and the last two digits must be larger than the previous two.

10. Paste the picture

To effect, crop a portion of the picture and rotate it, and finally paste it into the specified area:

Run:

Summarize:

If you need more powerful image manipulation, you can use the Matplotlib class library, which has more powerful drawing capabilities than PIL, such as a powerful bar chart, pie chart, scatter plot, and more.

Python image Processing!