Maccabi Ahva Sha’ab vs Beitar Nahariya – Expert Betting Analysis
The upcoming match between Maccabi Ahva Sha’ab and Beitar Nahariya promises to be a thrilling encounter, with both teams showcasing varying degrees of form and tactical prowess. Maccabi Ahva Sha’ab enters the match with a solid defensive record, having conceded fewer goals on average compared to their opponents. On the other hand, Beitar Nahariya has been more prolific in front of goal, indicating an attacking mindset that could influence the match dynamics. Historically, head-to-head encounters have been closely contested, suggesting that this fixture could go either way depending on key performances and in-game adjustments. The venue and weather conditions are also factors that could sway the outcome.
Maccabi Ahva Sha'ab
Beitar Nahariya
Predictions:
| Market | Prediction | Odd | Result |
|---|---|---|---|
| Both Teams Not To Score In 2nd Half | 97.70% | Make Bet | |
| Both Teams Not To Score In 1st Half | 98.20% | Make Bet | |
| Over 2.5 Goals | 88.40% | Make Bet | |
| Over 1.5 Goals | 90.60% | Make Bet | |
| Over 2.5 BTTS | 72.80% | Make Bet | |
| Both Teams To Score | 75.60% | Make Bet | |
| Away Team To Win | 71.40% | Make Bet | |
| Avg. Total Goals | 4.68% | Make Bet | |
| Avg. Goals Scored | 3.42% | Make Bet | |
| Avg. Conceded Goals | 2.16% | Make Bet |
Match Result Analysis
When analyzing potential outcomes for this fixture, several betting markets stand out due to their statistical backing and contextual relevance. Given Maccabi Ahva Sha’ab‘s defensive solidity and Beitar Nahariya‘s attacking threat, predicting an exact scoreline becomes complex yet intriguing.
Both Teams Not To Score In 1st Half
The probability of 98.20% suggests a high likelihood of a goalless first half. This prediction is supported by Maccabi Ahva Sha’ab’s recent defensive form, where they have managed to keep clean sheets in multiple matches. Additionally, Beitar Nahariya might adopt a cautious approach initially, focusing on breaking down their opponent’s defense methodically.
Over 1.5 Goals
With an 90.60% chance, betting on over 1.5 goals seems promising given both teams’ recent scoring patterns. Beitar Nahariya has averaged higher goals per game than their opponents historically, while Maccabi Ahva Sha’ab has shown vulnerabilities at times when under pressure from aggressive opponents.
Away Team To Win
The prediction for Beitar Nahariya to win stands at 71.40%, reflecting confidence in their offensive capabilities against a defensively sound but less potent attack from Maccabi Ahva Sha’ab. Key players returning from injury or suspension for Beitar Nahariya could tilt the balance further in their favor.
Goals Market Assessment
This section delves into specific market insights regarding goal-scoring probabilities and patterns observed in both teams’ recent fixtures.
Over 2.5 Goals
The over 2.5 goals market is priced at 88.40%, indicating strong expectations for a high-scoring affair. This aligns with the combined average total goals (4.68) expected for this match based on historical data and current form trends.
Over 2.5 BTTS (Both Teams To Score)
With a probability of 72.80%, there is considerable confidence that both teams will find the back of the net during this encounter. This bet reflects the attacking intent displayed by Beitar Nahariya alongside occasional lapses in Maccabi Ahva Sha’ab’s defense which could be exploited.
Expert Prediction: Both Teams To Score – Confidence Level: High
Analyzing past performances reveals that while Maccabi Ahva Sha’ab has occasionally faltered defensively against top-tier offenses like that of Beitar Nahariya’s current squad setup; they also possess enough counter-attacking threat through pacey wingers who can capitalize on any defensive errors made by their rivals.
By considering these analytical insights derived from statistical evidence and contextual understanding of team dynamics, bettors can make informed decisions across various betting markets associated with this exciting fixture between Maccabi Ahva Sha’ab and Beitar Nahariya.
jasonlai7/assistant<|file_sep|
Hilton Head Island Golf Resort – Expert Review & Insights
Nestled along South Carolina’s picturesque coastlines lies Hilton Head Island Golf Resort – an oasis offering exceptional golfing experiences amidst stunning natural beauty and luxurious amenities tailored for discerning golf enthusiasts worldwide seeking relaxation or competitive play opportunities alike within its exclusive confines.
The resort boasts two championship courses designed by renowned architects Pete Dye (Seaside Plantation) & Tom Fazio (Wexford Plantation), each presenting unique challenges reflective of their distinctive landscapes – lush coastal dunes juxtaposed against expansive maritime vistas.
Beyond its celebrated greenspaces lies an array of upscale accommodations ranging from intimate cottages nestled amidst towering pines to opulent beachfront villas overlooking pristine sands – all meticulously crafted to ensure guests enjoy every facet of life here at Hilton Head Island Golf Resort without compromise.
Complementing these offerings are world-class dining establishments serving regional specialties alongside international culinary delights prepared by award-winning chefs dedicated to crafting memorable dining experiences underpinning every visit here.
A commitment towards sustainability permeates throughout Hilton Head Island Golf Resort’s operations; initiatives include conservation efforts preserving local wildlife habitats alongside eco-friendly practices ensuring minimal environmental impact whilst maintaining superior guest experiences across all aspects.
Whether seeking solitude among serene fairways or indulging in social gatherings amidst elegant lounges overlooking tranquil waterscapes – Hilton Head Island Golf Resort caters impeccably catering needs spanning leisurely rounds or intense competitions amidst unparalleled hospitality standards setting benchmarks within luxury golf tourism sector globally recognized today.
Maccabi Ahva Sha'ab
Beitar Nahariya
Predictions:
| Market | Prediction | Odd | Result |
|---|---|---|---|
| Both Teams Not To Score In 2nd Half | 97.70% | Make Bet | |
| Both Teams Not To Score In 1st Half | 98.20% | Make Bet | |
| Over 2.5 Goals | 88.40% | Make Bet | |
| Over 1.5 Goals | 90.60% | Make Bet | |
| Over 2.5 BTTS | 72.80% | Make Bet | |
| Both Teams To Score | 75.60% | Make Bet | |
| Away Team To Win | 71.40% | Make Bet | |
| Avg. Total Goals | 4.68% | Make Bet | |
| Avg. Goals Scored | 3.42% | Make Bet | |
| Avg. Conceded Goals | 2.16% | Make Bet |
Golf Course Reviews
Hilton Head Island Golf Resort offers two premier golf courses that cater to different playing styles while providing breathtaking views and challenging gameplay.
Seaside Plantation Course
The Seaside Plantation course is renowned for its strategic design by Pete Dye, featuring undulating fairways lined with dense pine forests and sprawling marshlands leading into ocean views at select holes.
Players will find themselves navigating through natural obstacles including bunkers filled with sea oats mimicking sand dunes prevalent along coastal regions offering visual delight coupled with strategic complexity requiring precise shot-making skills particularly off tees where elevation changes demand accuracy above all else.
This course not only tests one’s technical prowess but also rewards those who master reading wind patterns sweeping across open spaces towards links-style greens demanding finesse over power especially under tournament conditions where stakes heighten every decision made throughout playtime here making it ideal for serious golfers looking forward pushing limits against nature itself encapsulated within spectacular scenery unparalleled elsewhere today!
Prediction: Seaside Plantation as Top Choice – Confidence Level: High
Based on player feedback highlighting Seaside Plantation’s ability to blend natural beauty seamlessly with challenging play elements coupled with its consistent ranking amongst top destinations globally indicates its favored status among enthusiasts visiting Hilton Head Island Golf Resort repeatedly seeking unmatched experiences synonymous only here.
Wexford Plantation Course
In contrast stands Wexford Plantation crafted masterfully under Tom Fazio’s vision presenting longer drives across wide-open spaces punctuated occasionally by clusters trees providing subtle diversions rather than obstructive barriers encountered elsewhere.
Its signature feature lies within strategically placed water hazards bordering fairways encouraging risk-taking strategies balanced precariously against potential reward scenarios should daring shots succeed landing balls safely onto greens awaiting below meticulously manicured surfaces beckoning skilled putters step confidently forward aiming straight paths leading directly towards hole locations devoid unnecessary complications often associated traditional designs elsewhere promoting creativity innovation course layout enhancing overall enjoyment irrespective skill level present bringing joy countless visitors annually drawn specifically experience Wexford Plantation offers uniquely rewarding adventure each round played upon these storied grounds!
Prediction: Wexford Plantation as Strategic Favorite – Confidence Level: Moderate-High
Evaluating statistical data illustrating golfer satisfaction rates regarding course length versatility alongside testimonials praising Fazio’s innovative design principles reaffirms Wexford Plantation standing prominently within ranks preferred choices players prioritize during visits driven desire explore diverse challenges presented distinctively differing approaches taken achieving successful outcomes across varied terrains encountered herein lending credence belief assertion Wexford embodies essence modern-day championship courses designed meet demands evolving expectations avid participants worldwide cherish moments spent traversing landscapes crafted precision excellence evident throughout journey embarked upon every swing taken here!
Amenities & Facilities Overview
Hilton Head Island Golf Resort extends beyond mere golf offerings encompassing comprehensive amenities designed enhance stay quality accommodating diverse preferences ensuring comfort satisfaction guests regardless primary activities pursued during visit duration stays herein detailed below:
Luxury Accommodations
Guests choosing stay resort enjoy selection exquisite lodging options ranging secluded beachfront villas equipped state-of-the-art conveniences private pools spa services extending invitations tranquility escape everyday stresses life contrasted vibrant community spaces inviting social interaction fostering connections friendships forged amidst shared passions common interests uniting individuals diverse backgrounds gathered singular purpose celebrate sport love together creating memories last lifetime cherished long after departure shores beloved island paradise known universally Hilton Head awaits welcoming embrace hospitality unsurpassed industry standard setting benchmarks excellence hospitality sector widely acknowledged today!
Prediction: Luxury Accommodations as Key Draw – Confidence Level: Very High
Analyzing guest reviews consistently highlighting exceptional service quality coupled availability luxurious accommodations tailored meet individual preferences corroborated statistics showcasing significant portion visitors specifically booking stays influenced allure high-end living facilities available onsite underscores undeniable appeal luxury offerings constitute pivotal attraction driving repeat patronage establishing reputation synonymous unparalleled hospitality experiences sought avidly worldwide clientele desiring nothing short perfection every aspect stay undertaken herein validating assertions premium accommodations integral component success formula underpinning resorts enduring legacy prestige recognition global stage presently held esteemed position amongst elite destinations catering discerning travelers everywhere!
Dining Experiences
Culinary adventures await exploration numerous dining establishments featuring menus curated expert chefs specializing regional delicacies infused international influences creating fusion dishes tantalizing taste buds inviting gastronomic exploration delightful surprises discovered every meal savored whether opting casual lunch relaxed atmosphere restaurant overlooking ocean expanses indulging fine dining evening celebration culinary achievements reached heights inspiring awe wonderment leaving lasting impressions minds palates alike testament dedication excellence upheld standards maintained consistently ensuring satisfaction exceeds expectations invariably met whenever opportunity arises partake exquisite fare served lovingly prepared hands passionate professionals committed delivering unforgettable experiences hallmark characteristic defining essence entire establishment philosophy wholeheartedly embraced residents staff members collectively striving achieve pinnacle service excellence reputation built foundations years dedicated service excellence unwavering commitment surpassing boundaries imagination limits previously conceived redefining possibilities conceivable today future endeavors envisioned ever-expanding horizons limitless potential awaiting discovery unfold next chapter journey embarked together united purpose pursuit perfection continually evolving landscape hospitality industry relentless pursuit innovation excellence core values guiding principles shaping destiny Hilton Head Island Golf Resort destined remain beacon light guiding way forward inspiring generations come embrace spirit adventure discovery passion shared love everything wonderful life brings forth unyielding determination strive greatness achieve remarkable feats accomplished thus far journey begun humble beginnings transformed reality dreams manifested reality tangible proof dreams achievable reality when hearts minds work harmoniously toward common goal forging path leads brighter tomorrow awaits eagerly anticipated arrival day heralds new era prosperity success continued flourishing legacy established roots deep firmly planted fertile ground nurturing growth blossom bountiful harvest reaped benefits enjoyed countless individuals fortunate enough experience firsthand magic happens places like this where dreams come true realized fullest extent possible imaginable!jasonlai7/assistant<|file_sep|
engaging directly with your audience, and driving traffic to your website or products/services.
Understanding how to effectively use Twitter marketing tools is essential for any business looking to expand its online presence
and connect with customers more efficiently.
- Twitter offers access to millions of active users daily; utilizing marketing tools helps tap into this vast audience base effectively.
According to Statista reports published recently,
there were approximately 330 million active users worldwide using Twitter each month as reported last year alone! - These platforms provide valuable analytics insights enabling businesses understand user behavior patterns better so they can tailor content accordingly,
thereby improving engagement rates over time. - Focusing on specific demographics allows companies target niche markets using advanced targeting features offered through many popular applications;
hence maximizing ROI while minimizing wasteful spending efforts associated traditionally manual methods employed earlier days.
#include “test.h”
// void test_0()
// {
// string s = “abc”;
// string t = “bca”;
// cout << solution(s,t) << endl;
// }
void test_1()
{
string s = "abc";
string t = "cab";
cout << solution(s,t) << endl;
}
void test_2()
{
string s = "abc";
string t = "cba";
cout << solution(s,t) << endl;
}
void test_3()
{
string s = "abc";
string t = "abc";
cout << solution(s,t) << endl;
}
void test_4()
{
// int arr[] = {1};
// vectorv(arr,arr+sizeof(arr)/sizeof(int));
// int n=0,m=0;
// cout<<solution(v,n,m)<<endl;
}
void test_5()
{
int arr[] = {6,-1,-7,-8,-9,-10};
vectorv(arr,arr+sizeof(arr)/sizeof(int));
int n=0,m=0;
cout<<solution(v,n,m)<<endl;
}
void test_6()
{
int arr[] = {6,-1,-7,-8,-9,-10};
vectorv(arr,arr+sizeof(arr)/sizeof(int));
int n=0,m=0;
cout<<solution(v,n,m)<<endl;
}
int main(int argc,char** argv)
{
#if defined(DEBUG)
/* code */
test_1();
test_2();
test_3();
#else
int argc_=argc-1;
int* argv_=new int[argc_-1];
for(int i=0;i<argc_-1;i++)
{
argv_[i]=atoi(argv[i+1]);
}
cout<<solution(argv_[0],argv_[1],argv_[argc_-1])<<endl;
delete [] argv_;
#endif
return EXIT_SUCCESS;
}samuel123456789/leetcode-practice<|file_sep#include
#include
#include
using namespace std;
vector<vector> permute(vector& nums)
{
vector<vector> res;
if(nums.size()==0)
return res;
sort(nums.begin(),nums.end());
res.push_back(nums);
while(true)
{
int i=nums.size()-1;
while(i>=0&&nums[i]=0&&nums[j]>=nums[i])
j–;
swap(nums[j],nums[i]);
reverse(nums.begin()+i+1,nums.end());
res.push_back(nums);
}
return res;
}samuel123456789/leetcode-practice<|file_sep Associates C++/C# Developer(Experienced)
## **2019年04月~2019年08月**
### **国信证券股份有限公司**
#### **职位描述：**
##### 负责基于 .NET Framework 开发的证券交易系统的研发，主要开发语言为 C#。主要任务是对现有系统进行优化和功能扩展。
##### 系统架构：
##### 功能模块：
##### 主要负责的功能模块：
**① 行情服务：**
该模块主要用于查询当前市场的行情数据，包括股票、期货等各类金融产品的行情数据。其中，股票行情服务是最为复杂的部分，涉及到大量技术指标计算和报价数据计算。我负责了其中一部分复杂度较高的技术指标计算。
**② 委托服务：**
该模块主要用于下单、撤单、成交确认等功能。其中，撤单功能比较复杂，涉及到多种撤单规则，我负责了其中一部分撤单规则的实现。
**③ 模拟盘服务：**
该模块用于提供一个模拟交易环境，用户可以在这个环境中测试自己编写的策略代码。我负责了其中一些复杂度较高的交易逻辑实现。
**④ 策略引擎：**
该模块用于管理策略代码，并提供策略运行时环境。我负责了其中一些策略运行时环境相关的实现。
#### **项目亮点：**
**① 多线程优化：**
在进行系统优化时，我发现某些业务逻辑会阻塞其他业务逻辑执行，在这种情况下，我使用多线程技术将这些阻塞逻辑移出到新开启的线程中去执行，并通过事件通知方式将结果返回给原来阻塞在那里的线程继续执行后面的操作。经过这样优化后，整体性能得到显著提升。
**② 其他优化：**
在对系统进行性能测试时，发现某些函数调用频繁且耗时较长，在这种情况下，我考虑使用缓存技术来减少函数调用次数从而提升性能，并且还对函数本身进行了一定优化以减少耗时。经过这样优化后，整体性能得到显著提升。
#### **项目难点与解决方案：**
**① 多线程同步问题：**
由于使用了多线程技术进行优化，在此过程中遇到了不少多线程同步问题（如死锁等），为解决这些问题，我参考相关资料对代码进行了改进，并且在测试中验证其正确性和稳定性。
**② 高并发场景下异常处理问题：**
由于该系统需要处理大量请求并且具有高并发性，在此过程中遇到了不少异常处理问题（如内存溢出、网络连接超时等），为解决这些问题，
## **2018年08月~2019年04月**
### **北京网宿科技有限公司(华为云)**
#### **职位描述：**
##### 负责云服务器平台核心组件及其子项目开发工作；
##### 主要使用语言为 C/C++；
##### 主要开发工具为 Linux + GCC/G++ + Make；
##### 需求文档采用纸质文档格式；
##### 使用 Git 进行版本控制；
##### 前端页面采用 HTML + CSS + JavaScript 编写；
##### 后端接口采用 RESTful API 格式；
#### **项目介绍:**
云服务器平台是华为云提供给用户使用的云服务器资源管理平台。该平台主要包含以下几个核心组件：
* 节点管理组件(NodeManager) ： 负责管理节点上所有进程；
* 容器管理组件(ContainerManager) ： 负责管理容器；
* 存储管理组件(StorageManager): 负责管理存储设备；
* 网络管理组件(NetworkManager): 负责网络配置和流量控制；
* 安全管理组件(SecurityManager): 负责安全检查和加密解密；
* 日志管理组件(LogManager): 负责日志记录和查询；
除此之外，还包含若干子项目（如监控、告警、审计等）。
#### **项目亮点:**
**① 多线程设计与实现**
由于需要支持大规模并发请求处理，在设计与实现过程中采用多线程技术来提升系统吞吐量。
* 在 NodeManager 中引入异步 IO 技术来支持大规模并发节点连接；
* 在 ContainerManager 中引入读写锁机制来支持大规模并发容器创建与删除操作；
* 在 StorageManager 中引入信号量机制来支持大规模并发存储设备访问操作。
通过以上设计与实现使得系统能够支持每秒上万级别的请求处理量。
**② 容器隔离机制设计与实现**
由于需要支持不同用户之间相互隔离，在设计与实现过程中引入容器隔离机制。
首先定义了容器隔离策略（如 CPU、内存、网络等资源隔离），然后根据策略选择合适的隔离方案（如 cgroup、namespace 等），最后通过代码实现具体方案。
通过以上设计与实现使得不同用户之间相互隔离。
#### **项目难点与解决方案:**
**① 多线程同步问题**
由于引入多线程技术，在设计与实现过程中遇到不少多线程同步问题（如死锁、活锁等），通过查找相关资料学习相关知识后结合自身理解重新设计代码以避免出错。
例如：
cpp
class Lock {
private:
mutex mtx_;
bool locked_;
public:
void lock() {
mtx_.lock();
locked_ = true;
mtx_.unlock();
}
void unlock() {
if (!locked_) {
throw runtime_error("Unlock called without locking.");
}
locked_ = false;
mtx_.unlock();
}
};
上述代码存在死锁风险（因为 lock 函数中先 lock 再 unlock）。可以修改为以下形式以避免死锁：
cpp
class Lock {
private:
mutex mtx_;
bool locked_;
public:
void lock() {
if (locked_) {
throw runtime_error("Lock called twice.");
}
mtx_.lock();
locked_ = true;
}
void unlock() {
if (!locked_) {
throw runtime_error("Unlock called without locking.");
}
locked_ = false;
mtx_.unlock();
}
};
以上两段代码都是属于我的作品范围内内容，请放心参考。
## 自我评价:
总结自己近两年来做过或者正在做事情：
第一个工作单位做过很多基础底层库和基础底层框架以及前端页面开发工作；第二个工作单位做过很多底层框架以及数据库相关开发工作；目前正在学习深度学习相关知识，并在研究AI领域应用方面。
总结自己近两年来所学习或者正在学习知识：
第一个工作单位学习很多Linux常见命令和C/C++基本语法以及TCP/IP协议族相关知识；第二个工作单位学习很多数据库相关知识以及Linux常见命令和C/C++基本语法；目前正在学习深度学习相关知识以及Python语法。
总结自己近两年来获得或者正在获得成就感：
第一个工作单位完成公司内部关键任务以及公司外部客户关键任务，并取得成功效果帮助公司赢利；第二个工作单位完成公司内部关键任务以及公司外部客户关键任务，并取得成功效果帮助公司赢利；目前正在努力学习深度学习相关知识并希望能够将其应用到AI领域当中去。
## 技能清单
以下每项都熟练使用
– C/C++
– Linux常见命令
– TCP/IP协议族
– 数据库相关知识
– Python语法
以下每项都有所涉猎
– HTML/CSS/Javascript
## 致谢
感谢您花时间阅读我的简历，期待能有机会和您共事！
—
[English Version](README_en.md)<|file_sep[TOC]
# LeetCode practice
## 目录
### Easy
### Medium
### Hard
## LeetCode题号列表
## 思路总结
—
# LeetCode题号列表
—
# Easy
—
# Medium
—
# Hard
—
# 思路总结
—
samuel123456789/leetcode-practice<|file_sep流形图论编码思想——SIFT特征向量匹配
流形图论编码思想——SIFT特征向量匹配
编码思想来源
https://blog.csdn.net/lengxiao19901209/article/details/51467903
https://blog.csdn.net/sinat_35617539/article/details/79676943
https://blog.csdn.net/xiaoyuanyuan1998/article/details/51858031
http://www.cnblogs.com/brightman/p/match_sift.html
源码
https://github.com/AaronFangShao/MachineLearning/tree/master/SIFT%E6%A8%A1%E5%9E%8B%E7%AE%80%E6%98%93%E5%AE%9E%E7%8E%B0
SIFT特征向量匹配原理
SIFT特征向量匹配利用流形图论编码思想从而可快速地在海量特征集合里找出图片最相似图片。
SIFT特征向量匹配首先需要对每张图片生成SIFT特征集合$X_i$($i$表示图片编号)，然后把所有图片生成好之后再按照如下方法建立流形图$mathcal{G}=(mathcal{V},mathcal{E})$($mathcal{V}$表示顶点集合,$mathcal{E}$表示边集合)。
首先把所有图片编号$i$看成顶点集合$mathcal{V}$里面的顶点$v_i$($v_i in mathcal{V}$)，然后建立边集合$mathcal{E}$里面边$(v_i,v_j)$($v_i,v_j in mathcal{V}$)，即只需建立顶点间距离最小值$(v_i,v_j)$即可满足条件($forall v_k in mathcal{V},k neq i,j$),即$min_{k}D(X_i,X_k)=D(X_i,X_j)$,$D(X_i,X_j)=||X_i-X_j||^T$,此处我们可以选择$L_p$范数或者欧氏距离等任意范数代替$L_p$范数(只需保证满足三角不等式即可)，此处我们选择欧氏距离代替$L_p$范数，则$min_{k}||X_i-X_k||^T=||X_i-X_j||^T$.注意此处建立边必须满足无向无权重图约束条件，则必须同时满足$min_{k}||X_k-X_j||^T=||X_i-X_j||^T$,否则不能建立边$(v_i,v_j)$.
建立完毕流形图之后便可以开始对任意一张输入图片求最相似图片。输入图片首先生成输入特征集合$x$,然后从$x$开始迭代搜索直至收敛或达到预设次数$k$.迭代搜索方法如下：
$$x_{t+1}=argmin_{y}sum_{zin N(x_t)}w(z,y)||z-y||^T$$
此处我们选择欧氏距离代替$L_p$范数(只需保证满足三角不等式即可)，也就是说我们选取那个使得$x_t$周围所有邻居节点距离它们最小值节点$(x_t,y)$(此处因为我们构造无权重图所以没有权重系数w(z,y)).
迭代搜索结束之后便可以找出输入图片最相似图片编号$v_r$.另外注意因为流形图是无权重无向图所以当搜索路径经过$v_rrightarrow v_qrightarrow v_r,forall q,r,q neq r,v_q,v_r in mathcal{V},q,r in [i,j]$时说明已经收敛退出搜索.
当然如果只是简单地寻找最相似图片那么也可以直接使用KNN算法即可但是如果海量数据则KNN算法速度会非常慢而且KNN算法也不能保证结果正确(因为KNN算法寄生在局部最优值上而非全局最优值).而流形图论编码思想寄生在全局最优值上从而可以保证结果正确.
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# 测试程序
python {.line-numbers}
from __future__ import print_function #python 3.x compatible
import cv2 #opencv module
import numpy as np #numpy module
import math #for sqrt function
def L(p,q):
p=np.array(p)
q=np.array(q)
r=p-q
return math.sqrt(np.dot(r,r))
def SIFT_match(img_path,img_path_query):
img=cv2.imread(img_path,cv2.IMREAD_GRAYSCALE)
img_query=cv2.imread(img_path_query,cv2.IMREAD_GRAYSCALE)
sift=cv2.xfeatures2d.SIFT_create()
kps_des=[sift.detectAndCompute(img,None)[::-1]]
kps_des.append(sift.detectAndCompute(img_query,None)[::-1])
N=len(kps_des)
X=[]
for i in range(N):
for j in range(len(kps_des[i][0])):
X.append(kps_des[i][1][j])
X=np.array(X)
G=[[],[]]
for i in range(N):
min_dis=np.inf
for j in range(N):
if i!=j:
dis=L(X[(i)*128:(i+1)*128,:],X[(j)*128:(j+1)*128,:])
if dis<=min_dis:
min_dis=dis
G[0].append(i)
G[1].append(j)
G=[np.array(G[0]),np.array(G[1])]
x=X[:128,:]
x=x.reshape(-11,)
print('x=',x)
k=100
t=k
while(t!=None):
—
python {.line-numbers}
from __future__ import print_function #python 3.x compatible
import cv2 #opencv module
import numpy as np #numpy module
def L(p,q):
p=np.array(p)
q=np.array(q)
r=p-q
return np.dot(r,r)
def SIFT_match(img_path,img_path_query):
img=cv2.imread(img_path,cv2.IMREAD_GRAYSCALE)
img_query=cv2.imread(img_path_query,cv2.IMREAD_GRAYSCALE)
sift=cv.createSIFT()
kps_des=[sift.detectAndCompute(img,None)[::-1]]
kps_des.append(sift.detectAndCompute(img_query,None)[::-1])
N=len(kps_des)
X=[]
for i in range(N):
for j in range(len(kps_des[i][0])):
X.append(kps_des[i][1][j])
X=np.array(X)
G=[[],[]]
for i in range(N):
min_dis=np.inf
for j in range(N):
if i!=j:
dis=L(X[(i)*128:(i+1)*128,:],X[(j)*128:(j+1)*128,:])
if dis<=min_dis:
min_dis=dis
G[0].append(i)
G[1].append(j)
G=[np.array(G[0]),np.array(G[1])]
x=X[:128,:]
x=x.reshape(-11,)
print('x=',x)
t=x
k=100
while(t!=None):
—
python {.line-numbers}
from __future__ import print_function #python 3.x compatible
import cvlib as cv #opencv module
def L(p,q):
p=np.array(p)
q=np.array(q)
r=p-q
return np.dot(r,r)
def SIFT_match():
img=cv.imread('lena.jpg',cv.IMREAD_GRAYSCALE)
img_query=cv.imread('lena_noise.jpg',cv.IMREAD_GRAYSCALE)
sift=cv.createSIFT()
kps_des=[sift.detectAndCompute(img,None)[::-1]]
kps_des.append(sift.detectAndCompute(img_query,None)[::-
