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Refactor common functions for tflite detector implementations

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This commit is contained in:
Jimmy Hon 2025-05-20 04:46:09 +00:00
parent 5dd30b273a
commit a78518bd94
2 changed files with 41 additions and 31 deletions
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36
frigate/detectors/detector_utils.py Normal file
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@ -0,0 +1,36 @@
import numpy as np
def tflite_init(self, interpreter):
self.interpreter = interpreter
self.interpreter.allocate_tensors()
self.tensor_input_details = self.interpreter.get_input_details()
self.tensor_output_details = self.interpreter.get_output_details()
def tflite_detect_raw(self, tensor_input):
self.interpreter.set_tensor(self.tensor_input_details[0]["index"], tensor_input)
self.interpreter.invoke()
boxes = self.interpreter.tensor(self.tensor_output_details[0]["index"])()[0]
class_ids = self.interpreter.tensor(self.tensor_output_details[1]["index"])()[0]
scores = self.interpreter.tensor(self.tensor_output_details[2]["index"])()[0]
count = int(self.interpreter.tensor(self.tensor_output_details[3]["index"])()[0])
detections = np.zeros((20, 6), np.float32)
for i in range(count):
if scores[i] < 0.4 or i == 20:
break
detections[i] = [
class_ids[i],
float(scores[i]),
boxes[i][0],
boxes[i][1],
boxes[i][2],
boxes[i][3],
]
return detections

36
frigate/detectors/plugins/cpu_tfl.py
View File

@ -1,12 +1,13 @@
import logging import logging
import numpy as np
from pydantic import Field from pydantic import Field
from typing_extensions import Literal from typing_extensions import Literal
from frigate.detectors.detection_api import DetectionApi from frigate.detectors.detection_api import DetectionApi
from frigate.detectors.detector_config import BaseDetectorConfig from frigate.detectors.detector_config import BaseDetectorConfig
from ..detector_utils import tflite_detect_raw, tflite_init
try: try:
from tflite_runtime.interpreter import Interpreter from tflite_runtime.interpreter import Interpreter
except ModuleNotFoundError: except ModuleNotFoundError:
@ -27,39 +28,12 @@ class CpuTfl(DetectionApi):
type_key = DETECTOR_KEY type_key = DETECTOR_KEY
def __init__(self, detector_config: CpuDetectorConfig): def __init__(self, detector_config: CpuDetectorConfig):
self.interpreter = Interpreter( interpreter = Interpreter(
model_path=detector_config.model.path, model_path=detector_config.model.path,
num_threads=detector_config.num_threads or 3, num_threads=detector_config.num_threads or 3,
) )
self.interpreter.allocate_tensors() tflite_init(self, interpreter)
self.tensor_input_details = self.interpreter.get_input_details()
self.tensor_output_details = self.interpreter.get_output_details()
def detect_raw(self, tensor_input): def detect_raw(self, tensor_input):
self.interpreter.set_tensor(self.tensor_input_details[0]["index"], tensor_input) return tflite_detect_raw(self, tensor_input)
self.interpreter.invoke()
boxes = self.interpreter.tensor(self.tensor_output_details[0]["index"])()[0]
class_ids = self.interpreter.tensor(self.tensor_output_details[1]["index"])()[0]
scores = self.interpreter.tensor(self.tensor_output_details[2]["index"])()[0]
count = int(
self.interpreter.tensor(self.tensor_output_details[3]["index"])()[0]
)
detections = np.zeros((20, 6), np.float32)
for i in range(count):
if scores[i] < 0.4 or i == 20:
break
detections[i] = [
class_ids[i],
float(scores[i]),
boxes[i][0],
boxes[i][1],
boxes[i][2],
boxes[i][3],
]
return detections