Created
September 3, 2021 19:21
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""" | |
Make a program that takes an image and classifies it as either "a goat" or "not a goat" | |
""" | |
# load the image and convert it to grayscale | |
image = cv2.imread("images/goat.png") | |
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY) | |
# initialize the list of class labels and the image | |
CLASSES = ["background", "aeroplane", "bicycle", "bird", | |
"boat", "bottle", "bus", "car", | |
"cat", "chair", "cow", | |
"diningtable", "dog", "horse", | |
"motorbike", "person", "pottedplant", | |
"sheep", "sofa", "train", | |
"tvmonitor"] | |
COLORS = np.random.uniform(0, 255, size=(len(CLASSES), 3)) | |
# define the model parameters | |
model = cv2.dnn.readNetFromCaffe("models/goat.prototxt", "models/goat.caffemodel") | |
# create the blob with the image | |
blob = cv2.dnn.blobFromImage(image, 0.007843, (W, H), 127.5) | |
# run the model | |
model.setInput(blob) | |
detections = model.forward() | |
# loop over the detections | |
for i in np.arange(0, detections.shape[2]): | |
# extract the confidence (i.e., probability) associated with | |
# the prediction | |
confidence = detections[0, 0, i, 2] | |
# filter out weak detections by ensuring the `confidence` is | |
# greater than the minimum confidence | |
if confidence > args["confidence"]: | |
# extract the index of the class label from the `detections`, | |
# then compute the (x, y)-coordinates of the bounding box for | |
# the object | |
idx = int(detections[0, 0, i, 1]) | |
box = detections[0, 0, i, 3:7] * np.array([W, H, W, H]) | |
(startX, startY, endX, endY) = box.astype("int") | |
# display the prediction | |
label = "{}: {:.2f}%".format(CLASSES[idx], confidence * 100) | |
print("[INFO] {}".format(label)) | |
cv2.rectangle(image, (startX, startY), (endX, endY), | |
COLORS[idx], 2) | |
y = startY - 15 if startY - 15 > 15 else startY + 15 | |
cv2.putText(image, label, (startX, y), | |
cv2.FONT_HERSHEY_SIMPLEX, 0.5, COLORS[idx], 2) | |
# show the output image | |
cv2.imshow("Output", image) | |
cv2.waitKey(0) |
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