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RSS订阅原创 如何使用pytorch建立逻辑回归模型
-- coding:utf-8 --import torchimport torch.nn as nnimport torchvision.datasets as dsetsimport torchvision.transforms as transformsfrom torch.autograd import Variable模型参数单个图像大小28*28=784input_si...
2019-06-23 14:20:50
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原创 用pytorch写一个简单的线性回归模型
import torchimport torch.nn as nnimport numpy as npimport matplotlib.pyplot as pltfrom torch.autograd import Variable定义超参数input_size = 1output_size = 1num_epochs = 1000 # 训练次数learning_rate =...
2019-06-16 14:52:39
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原创 opencv使用Harr级联创建一个人脸识别器
-- coding:utf-8 --import cv2import numpy as np加载人脸检测级联文件face_cascade = cv2.CascadeClassifier(‘cascade_files/haarcascade_frontalface_alt.xml’)确认级联文件是否正确加载if face_cascade.empty():raise IOError(‘U...
2019-06-02 15:56:46
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原创 opencv算法，直方图均衡化
import sysimport cv2import numpy as np加载彩色图像，日落照片为例input_file = “sunset.jpg”img = cv2.imread(input_file)转化为灰度图像img_gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)cv2.imshow(‘Input grayscale image...
2019-06-02 15:12:10
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原创 opencv边缘检测算法示例
-- coding:utf-8 --import sysimport cv2import numpy as np图片文件名称，和代码放在了同一文件夹下input_file = “mychair.jpg”opencv读取灰度图像img = cv2.imread(input_file, cv2.IMREAD_GRAYSCALE)opencv读取彩色图像img = cv2.imread...
2019-06-02 14:44:42
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转载 如何使用python调用电脑麦克录音
import waveimport pyaudio定义数据流块CHUNK = 1024FORMAT = pyaudio.paInt16CHANNELS = 2RATE = 44100录音时间RECORD_SECONDS = 5要写入的文件名WAVE_OUTPUT_FILENAME = “output.wav”创建PyAudio对象p = pyaudio.PyAudio()...
2019-06-02 14:02:04
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原创 python如何爬取猫眼电影排行榜
-- coding:utf-8 --import jsonimport requestsfrom requests.exceptions import RequestExceptionimport reimport timedef get_one_page(url):try:#伪装浏览器headers = {‘User-Agent’: ‘Mozilla/5.0 (Macinto...
2019-06-02 10:40:26
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转载 如何使用opencv调用笔记本摄像头拍照
-- coding:utf-8 --from os import mkdirfrom os.path import isdirimport datetimefrom time import sleepimport cv2调用笔记本主摄像头cap = cv2.VideoCapture(0)拍摄5张照片for i in range(5):now = str(datetime.dat...
2019-05-26 15:26:36
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原创 使用tensorflow解决XOR问题示例
导入包：import tensorflow as tfimport numpy as np#定义输入与目标值X = np.array([[0, 0], [0, 1], [1, 0], [1, 1]])Y = np.array([[0], [1], [1], [0]])设置tensorflow神经网络（包含一层隐藏网络）#定义占位符，从输入或目标中按行取数据x = tf....
2018-11-11 22:00:46
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翻译 python语音识别基于hmmlearn库（隐马尔科夫模型）
import os import numpy as np from scipy.io import wavfile # 仅限于wav音频文件 from hmmlearn import hmm from python_speech_features import mfcc创建HMM类详见：https://www.cnblogs.com/pinard/p/7001397.html...
2018-08-26 23:28:22
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