1. opencv與Image類相互轉換
#OpenCV轉換成PIL.Image格式
image = Image.fromarray(cv2.cvtColor(img,cv2.COLOR_BGR2RGB))
#Image轉換成OpenCV格式
img = cv2.cvtColor(numpy.asarray(image),cv2.COLOR_RGB2BGR)
2. 圖片添加不透明度後合成
from PIL import Image
def blend_two_images():
img1 = Image.open( "bridge.png ")
img1 = img1.convert('RGBA')
img2 = Image.open( "birds.png ")
img2 = img2.convert('RGBA')
img = Image.blend(img1, img2, 0.3)
img.show()
img.save( "blend.png")
return
3.給圖片添加文字
opencv方式
import cv2
import numpy as np
from pylab import *
%matplotlib inline
font=cv2.FONT_HERSHEY_SIMPLEX#使用默認字體
im=np.zeros((50,50,3),np.uint8)#新建圖像,注意一定要是uint8
img=cv2.putText(im,'3',(0,40),font,1.2,(255,255,255),2)#添加文字,1.2表示字體大小,(0,40)是初始的位置,(255,255,255)表示顏色,2表示粗細
PIL方式
import cv2
from PIL import Image, ImageColor, ImageFont, ImageDraw, ImageFilter
font = ImageFont.truetype('../fonts/Aller_Bd.ttf', 50)
im = Image.new("RGB", (50, 50))
draw = ImageDraw.Draw(im)
x, y = (0, 0)
draw.text((x, y), '3', font=font)
offsetx, offsety = font.getoffset('3')
width, height = font.getsize('3')
im = np.array(im)