Python list与与NumPy array 区分详解区分详解
1. 数据类型数据类型 type()
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Yongqiang Cheng
from __future__ import absolute_import
from __future__ import print_function
from __future__ import division
import os
import sys
sys.path.append(os.path.dirname(os.path.abspath(__file__)) + '/..')
current_directory = os.path.dirname(os.path.abspath(__file__))
import numpy as np
# import tensorflow as tf
import cv2
import time
print(16 * "++--")
print("current_directory:", current_directory)
PIXEL_MEAN = [123.68, 116.779, 103.939] # R, G, B. In TensorFlow, channel is RGB. In OpenCV, channel is BGR.
print("Python list")
print("PIXEL_MEAN:", PIXEL_MEAN)
print("type(PIXEL_MEAN):", type(PIXEL_MEAN))
print("type(PIXEL_MEAN[0]):", type(PIXEL_MEAN[0]), "")
PIXEL_MEAN_array = np.array(PIXEL_MEAN)
print("NumPy array")
print("PIXEL_MEAN_array:", PIXEL_MEAN_array)
print("type(PIXEL_MEAN_array):", type(PIXEL_MEAN_array))
print("type(PIXEL_MEAN_array[0]):", type(PIXEL_MEAN_array[0]))
print("PIXEL_MEAN_array.dtype:", PIXEL_MEAN_array.dtype)
/usr/bin/python2.7 /home/strong/tensorflow_work/R2CNN_Faster-RCNN_Tensorflow/yongqiang.py --gpu=0
++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--++--
current_directory: /home/strong/tensorflow_work/R2CNN_Faster-RCNN_Tensorflow
Python list
PIXEL_MEAN: [123.68, 116.779, 103.939] type(PIXEL_MEAN): <type 'list'>
type(PIXEL_MEAN[0]): <type 'float'>
NumPy array
PIXEL_MEAN_array: [123.68 116.779 103.939] type(PIXEL_MEAN_array): <type 'numpy.ndarray'>
type(PIXEL_MEAN_array[0]): <type 'numpy.float64'>
PIXEL_MEAN_array.dtype: float64
Process finished with exit code 0
2. 数据融合数据融合 (data fusion)
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Yongqiang Cheng
from __future__ import absolute_import
from __future__ import print_function
from __future__ import division
import os
import sys
sys.path.append(os.path.dirname(os.path.abspath(__file__)) + '/..')
current_directory = os.path.dirname(os.path.abspath(__file__))
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