```python
import paddle
from ppdiffusers import DiffusionPipeline, ControlNetModel
from ppdiffusers.utils import load_image, image_grid
import numpy as np
from PIL import Image
import cv2

class CannyDetector:
    def __call__(self, img, low_threshold, high_threshold):
        return cv2.Canny(img, low_threshold, high_threshold)
apply_canny = CannyDetector()

# 加载模型
controlnet = ControlNetModel.from_pretrained("lllyasviel/sd-controlnet-canny", paddle_dtype=paddle.float16)
pipe = DiffusionPipeline.from_pretrained("runwayml/stable-diffusion-v1-5", 
                                         controlnet=controlnet,
                                         safety_checker=None,
                                         feature_extractor=None,
                                         requires_safety_checker=False,
                                         paddle_dtype=paddle.float16, 
                                         custom_pipeline="webui_stable_diffusion_controlnet", 
                                         custom_revision="9aa0fcae034d99a796c3077ec6fea84808fc5875")

# 或者 # custom_pipeline="junnyu/webui_controlnet_ppdiffusers")

# 加载图片
raw_image = load_image("https://paddlenlp.bj.bcebos.com/models/community/junnyu/develop/control_bird_canny_demo.png")
canny_image = Image.fromarray(apply_canny(np.array(raw_image), low_threshold=100, high_threshold=200))

# 选择sampler
# Please choose in ['pndm', 'lms', 'euler', 'euler-ancestral', 'dpm-multi', 'dpm-single', 'unipc-multi', 'ddim', 'ddpm', 'deis-multi', 'heun', 'kdpm2-ancestral', 'kdpm2']!
pipe.switch_scheduler('euler-ancestral')

# propmpt 和 negative_prompt
prompt = "a (blue:1.5) bird"
negative_prompt = ""
# 想要返回多少张图片
num = 4
clip_skip = 2
controlnet_conditioning_scale = 1.
num_inference_steps = 50

all_images = []
print("raw_image vs canny_image")
display(image_grid([raw_image, canny_image], 1, 2))
for i in range(num):
    img = pipe(
        prompt=prompt,
        negative_prompt = negative_prompt,
        image=canny_image,
        num_inference_steps=num_inference_steps,
        controlnet_conditioning_scale=controlnet_conditioning_scale,
        clip_skip= clip_skip,
    ).images[0]
    all_images.append(img)
display(image_grid(all_images, 1, num))
```

![image](https://user-images.githubusercontent.com/50394665/231669030-ae9302f0-3110-4021-83a9-66a7218dfcc9.png)
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