mirror of
https://github.com/tinygrad/tinygrad.git
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799b3f185a
* Refactor getenv into helpers * Remove unused os * Fix default value * Fix more defaults for CI * Fix bracket * Revert changes to openpilot/compile.py * Use getenv from helpers when possible
91 lines
2.8 KiB
Python
91 lines
2.8 KiB
Python
# load weights from
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# https://github.com/lukemelas/EfficientNet-PyTorch/releases/download/1.0/efficientnet-b0-355c32eb.pth
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# a rough copy of
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# https://github.com/lukemelas/EfficientNet-PyTorch/blob/master/efficientnet_pytorch/model.py
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import os
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import sys
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import io
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import time
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import numpy as np
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np.set_printoptions(suppress=True)
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from tinygrad.tensor import Tensor
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from tinygrad.helpers import getenv
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from extra.utils import fetch, get_parameters
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from models.efficientnet import EfficientNet
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def infer(model, img):
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# preprocess image
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aspect_ratio = img.size[0] / img.size[1]
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img = img.resize((int(224*max(aspect_ratio,1.0)), int(224*max(1.0/aspect_ratio,1.0))))
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img = np.array(img)
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y0,x0=(np.asarray(img.shape)[:2]-224)//2
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retimg = img = img[y0:y0+224, x0:x0+224]
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# if you want to look at the image
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"""
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import matplotlib.pyplot as plt
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plt.imshow(img)
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plt.show()
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"""
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# low level preprocess
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img = np.moveaxis(img, [2,0,1], [0,1,2])
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img = img.astype(np.float32)[:3].reshape(1,3,224,224)
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img /= 255.0
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img -= np.array([0.485, 0.456, 0.406]).reshape((1,-1,1,1))
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img /= np.array([0.229, 0.224, 0.225]).reshape((1,-1,1,1))
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# run the net
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out = model.forward(Tensor(img)).cpu()
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# if you want to look at the outputs
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"""
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import matplotlib.pyplot as plt
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plt.plot(out.data[0])
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plt.show()
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"""
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return out, retimg
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if __name__ == "__main__":
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# instantiate my net
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model = EfficientNet(getenv("NUM", 0))
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model.load_from_pretrained()
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# category labels
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import ast
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lbls = fetch("https://gist.githubusercontent.com/yrevar/942d3a0ac09ec9e5eb3a/raw/238f720ff059c1f82f368259d1ca4ffa5dd8f9f5/imagenet1000_clsidx_to_labels.txt")
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lbls = ast.literal_eval(lbls.decode('utf-8'))
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# load image and preprocess
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from PIL import Image
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url = sys.argv[1]
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if url == 'webcam':
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import cv2
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cap = cv2.VideoCapture(0)
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cap.set(cv2.CAP_PROP_BUFFERSIZE, 1)
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while 1:
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_ = cap.grab() # discard one frame to circumvent capture buffering
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ret, frame = cap.read()
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img = Image.fromarray(frame[:, :, [2,1,0]])
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out, retimg = infer(model, img)
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print(np.argmax(out.data), np.max(out.data), lbls[np.argmax(out.data)])
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SCALE = 3
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simg = cv2.resize(retimg, (224*SCALE, 224*SCALE))
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retimg = cv2.cvtColor(simg, cv2.COLOR_RGB2BGR)
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cv2.imshow('capture', retimg)
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if cv2.waitKey(1) & 0xFF == ord('q'):
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break
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cap.release()
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cv2.destroyAllWindows()
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else:
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if url.startswith('http'):
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img = Image.open(io.BytesIO(fetch(url)))
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else:
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img = Image.open(url)
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st = time.time()
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out, _ = infer(model, img)
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print(np.argmax(out.data), np.max(out.data), lbls[np.argmax(out.data)])
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print("did inference in %.2f s" % (time.time()-st))
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#print("NOT", np.argmin(out.data), np.min(out.data), lbls[np.argmin(out.data)])
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