06 2024 档案

机器学习之logistic回归
摘要：import numpy as np from matplotlib import pyplot as plt def load_dataset(): data_list = [] label_list = [] with open('testSet.txt', 'r') as f: for lin 阅读全文
posted @ 2024-06-30 23:52 NAVYSUMMER 阅读(18) 评论(0) 推荐(0)
机器学习之朴素贝叶斯算法
摘要：import random from numpy import ones, log, array def load_dataset(): words = [ ["my", "dog", "has", "flea", "problems", "help", "please"], ["maybe", " 阅读全文
posted @ 2024-06-29 19:12 NAVYSUMMER 阅读(16) 评论(0) 推荐(0)
机器学习之决策树
摘要：import math import pickle from matplotlib import pyplot as plt def calc_shang(dataset: list): """ 计算给定数据集的香农熵 :param dataset: :return: """ length = le 阅读全文
posted @ 2024-06-09 15:52 NAVYSUMMER 阅读(15) 评论(0) 推荐(0)
机器学习之K近邻算法实现
摘要：import operator from numpy import array, tile def create_dataset(): _dataset = array([[1.0, 1.1], [1.0, 1.0], [0, 0], [0, 0.1]]) _labels = ['A', 'A', 阅读全文
posted @ 2024-06-08 14:26 NAVYSUMMER 阅读(17) 评论(0) 推荐(0)
ffmpeg音频编码之pcm转码aac
摘要：方法1：命令转码 # 转码 ffmpeg -ac 2 -ar 48000 -f s16le -i input.pcm -acodec libfdk_aac output.aac # 播放 ffplay output.aac 方法2：代码转码 main.c #include "libavutil/lo 阅读全文
posted @ 2024-06-08 00:00 NAVYSUMMER 阅读(177) 评论(0) 推荐(0)
ffmpeg音频解码之实现aac转pcm
摘要：方法1：命令解码 # 解码 ffmpeg -i input.aac output.pcm # 播放 ffplay output.pcm 方法2：代码解码 main.c #include "libavutil/log.h" #include "libavutil/avutil.h" #include 阅读全文
posted @ 2024-06-07 22:57 NAVYSUMMER 阅读(365) 评论(0) 推荐(0)
ffmpeg编码之实现YUV转换成H264
摘要：方法1：命令转换 # 转换 ffmpeg -s 720*1280 -pix_fmt yuv420p -i input.yuv -vcodec libx264 -b:v 4096k -bf 0 -g 10 -r 30 output.h264 # 播放 ffplay output.h264 方法2：代码 阅读全文
posted @ 2024-06-01 21:21 NAVYSUMMER 阅读(511) 评论(0) 推荐(0)

交流群 编程书籍