MaixPy3 基本使用示例

from maix import display, image   
hello_img = image.new(size = (240, 240), 
                              color = (255, 0, 0), mode = "RGB")     #创建一张红色背景图
hello_img.draw_string(30, 115, "hello world!", scale = 1.0, 
                              color = (255, 255, 255), thickness = 1) #在红色背景图上写下hello world
display.show(hello_img)   #把这张图显示出来

from maix import camera, display, image #引入python模块包

while True:
    img = camera.capture()    #从摄像头中获取一张图像
    display.show(img)         #将图像显示出来

from maix import image, display

img = image.new(size = (240, 240), color = (0, 0, 0), 
                        mode = "RGB")     #创建一张黑色背景图

img.draw_line(0, 0, 100, 100, color = (127, 127, 127), 
                        thickness = 1)  #画一条从（0,0）到（100,100）的白色线段

display.show(img)

from maix import image, display

img = image.new(size = (240, 240), color = (0, 0, 0), 
                        mode = "RGB")     #创建一张黑色背景图

img.draw_rectangle(10, 10, 60, 60, color=(255, 0, 0), 
                       thickness=-1)   #画一个从（10, 10）到（60, 60）的红色实心矩形

img.draw_rectangle(80, 160, 160, 200, color=(0, 0, 255), 
                       thickness=1)   #画一个从（80, 160）到（160, 200）的蓝色矩形外框

display.show(img)

from maix import image, display

img = image.new(size = (240, 240), color = (0, 0, 0), 
                        mode = "RGB")     #创建一张黑色背景图

img.draw_circle(50, 50, 20, color=(0, 0, 255), 
                        thickness=1)   #画一个中心点在（50,50），半径为20的空心蓝圆

img.draw_circle(150, 150, 20, color=(255, 0, 0), 
                        thickness=-1)  #画一个中心点在（150,150），半径为20的实心红圆

display.show(img)

from maix import display, image   #引入python模块包

hello_img = image.new(size = (240, 240), color = (0, 0, 0), 
                              mode = "RGB")     #创建一张黑色背景图

hello_img.draw_string(30, 115, "hello world!", scale = 1.0, color = (255, 255, 255), 
                              thickness = 1) #在黑色背景图上写下hello world

display.show(hello_img)   #把这张图显示出来

from maix import image, display

img = image.new(color=(255, 255, 255))
image.load_freetype("/home/res/sans.ttf")
s = "二进制例程"
x, y = image.get_string_size(s, 3)
img.draw_string(0, 120 - (y + 5), s, 3, (255, 0, 0)) # show left-button

s = "可执行文件示例"
x, y = image.get_string_size(s, 2)
img.draw_string(240 - x, 0, s, 2, (0, 255, 0)) # show right-up # wait fix

image.free_freetype()

s = "bin example"
x, y = image.get_string_size(s, 1)
img.draw_string(0, 240 - (y + 5), s, 1, (0, 0, 255)) # show left-button

display.show(img)

from maix import image, display
img = image.new(size = (240, 240), color = (0, 0, 0), 
                        mode = "RGB")     #创建一张黑色背景图
img.draw_ellipse(120, 40, 20, 50, 90, 0, 360, color=(0,255,0), 
                        thickness = 1)
display.show(img)

from maix import image, display

img = image.new(color=(255, 0, 0))
img.draw_string(100, 100, "hello", 2, color=(0, 0, 255))

mk = img.crop(90, 90, 100, 50) # 截一张图出来, x, y, w, h
imga = image.new(color=(0, 255, 0))
imga.draw_image(mk, 10, 10)
# imga.draw_image(imga) # py no-allow use self but libmaix support
imga.draw_image(mk, 100, 100, alpha=0.5)
display.show(imga)

from maix import image, display

img = image.new(color=(255, 0, 0))
img.draw_string(100, 100, "KL", 2, color=(0, 0, 255))

mk = img.crop(90, 90, 50, 50)

imga = image.new(color=(0, 255, 0))

imga.draw_image(mk, 10, 10) # 原图

imga.draw_image(mk.rotate(-90), 70, 10) # 顺时针 90 旋转

imga.draw_image(mk.flip(1), 130, 10) # 水平翻转 horizontal

imga.draw_image(mk.resize(80, 50), 10, 80) # 缩放到 (80, 50)

imga.draw_image(mk.flip(0), 100, 80) # 垂直翻转 vertical

imga.draw_image(mk.rotate(-135, adjust=0), 10, 150) # 顺时针 135 旋转

imga.draw_image(mk.rotate(+45, adjust=1), 100, 150) # 逆时针 45 旋转

display.show(imga)

from maix import image, display

img = image.new(size=(240, 240), mode="RGB", color=(255, 255, 255))
img.draw_line(0, 0, 240, 240)
img.draw_rectangle(40, 120, 160, 200, color=(255, 0, 0), thickness=16) #
img.draw_circle(120, 120, 20, color=(0, 255, 0))
img.draw_string(40, 40, "dalaoshu", 2, color=(0, 0, 255))

# 保存图片到 test.png 中
img.save("test.png")
# 读取 test.png 中的图片
tmp = image.open("test.png")

# 0.5.0 以后支持导出 jpg 、 bmp 、 png 、 默认 rgb 等格式的图像数据到 bytes 变量中，方便向外传输图像数据。
img_bytes = tmp.resize(size=(160, 120)).tobytes('jpg')
# >>> img_bytes = img.tobytes('jpg')
# >>> img_bytes[:2]
# b'\xff\xd8'
# >>> img_bytes[-2:]
# b'\xff\xd9'
# >>>
# >>> img_bytes = img.tobytes('bmp')
# >>> img_bytes[:2]
# b'BM'
# >>> img_bytes = img.tobytes('rgb')
# >>> img_bytes[:2]
# b'\x00\x00'
# >>> img_bytes = img.tobytes('png')
# >>> img_bytes[:2]
# b'\x89P'
# >>>

# 0.5.2 以后 image.open 支持直接打开上述格式导出的 bytes 编码数据。
tmp = image.open(img_bytes)
print('tmp.png', tmp)

tmp.save("tmp.png")

display.show(tmp)

from maix import image, display, camera
blue = [(34, 100, -38, 3, -128, -28)]  # 0.5.0 以后蓝色的 lab 阈值，0.4.9 之前为 [(13, 11, -91, 54, 48, -28)]
while True:
    img = camera.capture()
    blobs = img.find_blobs(blue, merge=True)    #在图片中查找lab阈值内的颜色色块 merge 合并小框。
    if blobs:
        for i in blobs:
            img.draw_rectangle(i["x"], i["y"], i["x"] + i["w"], i["y"] + i["h"], 
                               color=(0, 0, 255), thickness=1) #将找到的颜色区域画出来
    display.show(img)

from maix import image, display, camera
THRESHOLD = [(34, 100, -38, 3, -128, -28)]
while True:
    img = camera.capture().binary(THRESHOLD, invert=False, zero=False) # invert 取反阈值，zero 是否不填充阈值区域。
    display.show(img)

from maix import camera, display, image
while True:
    img = camera.capture()
    tmp = img.find_lines((0, 0, 240, 240), 2, 1, 1100, 50, 50)
    for l in tmp:
        img.draw_line(l[0], l[1], l[2], l[3], color = (0, 255, 0))
    display.show(img)

from maix import image, display, camera
import time

while True:
  img = camera.capture()
  line = img.find_line()
  img.draw_line(line["rect"][0], line["rect"][1], line["rect"][2],
                line["rect"][3], color=(255, 255, 255), thickness=1)
  img.draw_line(line["rect"][2], line["rect"][3], line["rect"][4],
                line["rect"][5], color=(255, 255, 255), thickness=1)
  img.draw_line(line["rect"][4], line["rect"][5], line["rect"][6],
                line["rect"][7], color=(255, 255, 255), thickness=1)
  img.draw_line(line["rect"][6], line["rect"][7], line["rect"][0],
                line["rect"][1], color=(255, 255, 255), thickness=1)
  img.draw_circle(line["cx"], line["cy"], 4,
                  color=(255, 255, 255), thickness=1)
  display.show(img)

from maix import image, display, camera
import time

while True:
  img = camera.capture()
  colors = img.get_blob_color((100, 100, 10, 10), 0, 0)
  img.draw_rectangle(100, 100, 110, 110, 
                               color=(255, 0, 0), thickness=1) #将找到的颜色区域画出来
  img.draw_rectangle(9, 9, 21, 21, 
                               color=(255, 255, 255), thickness=1) #将找到的颜色区域画出来
  img.draw_rectangle(10, 10, 20, 20, 
                               color=(int(colors[0]), int(colors[1]), int(colors[2])), thickness=-1) #将找到的颜色区域画出来
  display.show(img)

from maix import camera, display, zbar
while True:
    img = camera.capture()
    result = zbar.scan_codes(["qrcode", "code39"], img)
    display.show(img.draw_string(10, 10, str(result), 2.0, (255, 0, 0)))