这篇文章给大家分享的是有关HTML5中Canvas图像模糊的示例分析的内容。小编觉得挺实用的，因此分享给大家做个参考，一起跟随小编过来看看吧。
最近在用h6的canvas画动画，发现图像特别模糊。后来终于找到罪魁祸首是<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />这个代码，因为这行代码进行了伸缩
模糊图像的效果：
将压缩去掉后的效果
可以将代码改成
<!DOCTYPE html><html><head> <meta charset="utf-8" /> <meta name="viewport" content="user-scalable=no" /> <title>赛事详细页</title> <script src="js/rem.js" type="text/javascript" charset="utf-8"></script> <link rel="stylesheet" type="text/css" href="css/m_reset.css" /> <link rel="stylesheet" type="text/css" href="css/gameListsNew.css" /> <link href="css/mask.css" rel="stylesheet" /></head><body> <div class="tipMask"> <div class="tipBox"> <img src="img/faileTip.png" class="tipsImg" /> <div class="fileBtn"> <img src="img/fileBtn.png" /> <span class="tryAgain">再试一次</span> </div> </div> </div> <div> <img src="img/whiteBack.png" class="titleImg" /> <div class="bgEvent" id="contentbody"> <div id="eventDetail" v-cloak> <!--标题--> <div class="detailevent"> <div class="titlevs"> <img class="teamFlagLogo" onerror="nofind(this);" :src="'img/teamlogonew/'+eventDetail.HomeTeamID+'.png'" /> <div class="countryName"> {{eventDetail.HomeTeamName}} </div> </div> <div class="titlevs" style="padding-top:0.3rem ;"> <div> <!--未开赛--> <!--<p class="theWorldCup">世界杯</p>--> <p class="theGameNowDataTime">{{eventDetail.TimeFormat }}</p> <p class="gameBeginTime">{{getScoreOrVs(eventDetail.HomeTeamScore,eventDetail.AwayTeamScore)}}</p> </div> <!--开赛时长--> <!--<div> <p>73:40</p> </div>--> </div> <div class="titlevs"> <img class="teamFlagLogo" onerror="nofind(this);" :src="'img/teamlogonew/'+eventDetail.AwayTeamID+'.png'" /> <div class="countryName"> {{eventDetail.AwayTeamName}} </div> </div> </div> <div id="ordersuccess" class="ordersuccess"> <div style="text-align:right;padding-top:0.2rem;padding-left:0.2rem;"> <img src="img/ordersuccess/close.png" style="width:0.45rem;height:0.45rem;" id="closesuccess" onclick="closesuccess();" /> </div> <div class="teamname"> <div class="teamnameitem"><p class="teamnameitemtop">{{eventDetail.HomeTeamName}}</p><br /><p class="teamnameitembottom">HOME</p></div> <div class="teamnameitem "><p class="teamnameitemmiddle">VS</p></div> <div class="teamnameitem"><p class="teamnameitemtop">{{eventDetail.AwayTeamName}}</p><br /><p class="teamnameitembottom">AWAY</p></div> </div> <div class="teamdetail"> <div class="teamdate"><span>{{eventDetail.CompetitionName}}</span><span>/</span><span>{{eventDetail.DateFormat}}</span></div> <div class="teamplaysselection"> <table style="width:100%;text-align:left;height:100%;"> <tr> <td class="teamplaysselectiontop" style="width:50%;">玩法</td> <td class="teamplaysselectiontop" style="width:50%;">选项</td> </tr> <tr> <td class="teamplaysselectionbottom" style="width:50%;" id="rulename">Match Odds</td> <td class="teamplaysselectionbottom" style="width:50%;" id="selectionname">Home</td> </tr> </table> </div> <div class="teamwinmoney"> <table style="width:90%;text-align:left;height:100%;"> <tr> <td class="teamwinmoneytop" style="width:50%;"> 本金 </td> <td class="teamwinmoneytop" style="width:50%;"> 赔率 </td> <td class="teamwinmoneytop" style="width:50%;"> 预赢 </td> </tr> <tr> <td class="teamwinmoneybottom" style="width:50%;" id="betmoneysuc">1000</td> <td class="teamwinmoneybottom" style="width:50%;" id="betodds">12.54</td> <td class="teamwinmoneybottom" style="width:50%;" id="betwin">12540</td> </tr> </table> </div> </div> </div> </div> <div> <div class="square" id="square"> <canvas id="courtCaseNew" width="980" height="765"></canvas> </div> <img src="img/balllittle.png" style="width:20px;height:20px;display:none;" id="imgballNew" /> </div> <div class="middlechat"> <div class="middleitem" id="jcc"> <p class="tabActive">竞猜场</p> </div> <div class="middleitem" id="jcjl"> <p class="tabCommon">竞猜记录</p> </div> <div class="middleitem" id="sssj"> <p class="tabCommon">赛事事件</p> </div> <div class="middleitem" id="jstj"> <p class="tabCommon">技术统计</p> </div> </div> <div class="downChangrTab quizGames" style="display: block;"> <div id="ruleTypeItems" v-cloak> <!--胜平负--> <div class="diffPlaysTetx" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==100"> <span class="speciesName">赛果</span> <span class="rotary" v-if="item.State!=1">(已封盘)</span> <span class="speciesExp">猜90分钟(含补时)两队的比赛结果</span> </div> <div v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==100" id="result" name="selectionItems" class="result"> <div v-bind:class="[(select.BackOdds<1.01 || item.State!=1) ? 'resutitemGray commonBorderGray':'resutitem commonBorder']" v-for="(select,index) in item.Selection" v-on:click="select.BackOdds>=1.01 &&clickFun($event,item.State,select.BackOdds,item.MarketId,select.SelectionId,'赛果',select.SelectionName);" name="itemSelection"> <p class="winEquLose" v-bind:name="'item'+item.MarketId">{{select.SelectionName}}</p> <p class="winEquLoseOdds " v-bind:name="'item'+item.MarketId"> <span v-bind:id="item.MarketId+select.SelectionId" v-bind:maxlimit="select.MaxStakeLimit">{{select.BackOdds}}</span> <img src="img/upIng.png" style="width:0.2rem;display:none;" v-bind:id="'redOne'+item.MarketId+select.SelectionId" /> <img src="img/downIng.png" style="width:0.2rem;display:none;" v-bind:id="'greenOne'+item.MarketId+select.SelectionId" /> </p> </div> </div> <!--单双--> <div class="diffPlaysTetx" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==130"> <span class="speciesName">单双</span> <span class="rotary" v-if="item.State!=1">(已封盘)</span> <span class="speciesExp">猜90分钟(含补时)比赛总进球的单双</span> </div> <div id="oddeven" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==130" name="selectionItems" class="oddeven"> <div v-bind:class="[(select.BackOdds<1.01 || item.State!=1) ? 'oddevenitemGray commonBorderGray':'oddevenitem commonBorder']" v-for="(select,index) in item.Selection" v-on:click="select.BackOdds>=1.01 &&clickFun($event,item.State,select.BackOdds,item.MarketId,select.SelectionId,'单双',select.SelectionName)" name="itemSelection"> <p class="winEquLose" v-bind:name="'item'+item.MarketId" v-bind:id="'selectionname'+item.MarketId+select.SelectionId">{{select.SelectionName}}</p> <p class="winEquLoseOdds" v-bind:name="'item'+item.MarketId"> <span v-bind:id="item.MarketId+select.SelectionId" v-bind:maxlimit="select.MaxStakeLimit">{{select.BackOdds}}</span> <img src="img/upIng.png" style="width:0.2rem;display:none;" v-bind:id="'redOne'+item.MarketId+select.SelectionId" /> <img src="img/downIng.png" style="width:0.2rem;display:none;" v-bind:id="'greenOne'+item.MarketId+select.SelectionId" /> </p> </div> </div> <!--总进球--> <div class="diffPlaysTetx" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==410"> <span class="speciesName">总进球 </span> <span class="rotary" v-if="item.State!=1">(已封盘)</span> <span class="speciesExp">猜90分钟(含补时)比赛总进球的数 </span> </div> <div id="totalGoals" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==410" name="selectionItems" class="totalGoals"> <div v-bind:class="[(select.BackOdds<1.01 || item.State!=1) ? 'totalGoalitemGray commonBorderGray':'totalGoalitem commonBorder']" v-for="(select,index) in item.Selection" v-on:click="select.BackOdds>=1.01 &&clickFun($event,item.State,select.BackOdds,item.MarketId,select.SelectionId,'总进球',select.SelectionName)" name="itemSelection"> <p class="winEquLose" v-bind:name="'item'+item.MarketId" v-bind:id="'selectionname'+item.MarketId+select.SelectionId">{{select.SelectionName}}</p> <p class="winEquLoseOdds" v-bind:name="'item'+item.MarketId"> <span v-bind:id="item.MarketId+select.SelectionId" v-bind:maxlimit="select.MaxStakeLimit">{{select.BackOdds}}</span> <img src="img/upIng.png" style="width:0.2rem;display:none;" v-bind:id="'redOne'+item.MarketId+select.SelectionId" /> <img src="img/downIng.png" style="width:0.2rem;display:none;" v-bind:id="'greenOne'+item.MarketId+select.SelectionId" /> </p> </div> </div> <!--全场比分--> <div class="diffPlaysTetx" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==140"> <span class="speciesName">全场比分</span> <span class="rotary" v-if="item.State!=1">(已封盘)</span> <span class="speciesExp">猜90分钟(含补时)全场比分</span> </div> <div id="correctScoreHome" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==140" name="selectionItems" class="correctScoreHomeAway"> <div v-bind:class="[(select.BackOdds<1.01 || item.State!=1) ? 'correctScoreitemGray commonBorderGray':'correctScoreitem commonBorder']" v-for="(select,index) in item.Selection" v-on:click="select.BackOdds>=1.01 &&clickFun($event,item.State,select.BackOdds,item.MarketId,select.SelectionId,'全场比分',select.SelectionName)" name="itemSelection"> <p class="winEquLose" v-bind:name="'item'+item.MarketId" v-bind:id="'selectionname'+item.MarketId+select.SelectionId">{{select.SelectionName}}</p> <p class="winEquLoseOdds" v-bind:name="'item'+item.MarketId"> <span v-bind:id="item.MarketId+select.SelectionId" v-bind:maxlimit="select.MaxStakeLimit">{{select.BackOdds}}</span> <img src="img/upIng.png" style="width:0.2rem;display:none;" v-bind:id="'redOne'+item.MarketId+select.SelectionId" /> <img src="img/downIng.png" style="width:0.2rem;display:none;" v-bind:id="'greenOne'+item.MarketId+select.SelectionId" /> </p> </div> </div> <div class="downImg" onclick="clickImg()"> <img src="img/toDown.png" /> </div> <!--下一进球--> <div class="diffPlaysTetx" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==350"> <span class="speciesName">下一进球</span> <span class="rotary" v-if="item.State!=1">(已封盘)</span> <span class="speciesExp">猜90分钟(含补时)下一进球的球队</span> </div> <div id="nextgoal" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==350" name="selectionItems" class="result"> <div v-bind:class="[(select.BackOdds<1.01 || item.State!=1) ? 'resutitemGray commonBorderGray':'resutitem commonBorder']" v-for="(select,index) in item.Selection" v-on:click="select.BackOdds>=1.01 &&clickFun($event,item.State,select.BackOdds,item.MarketId,select.SelectionId,'下一进球',select.SelectionName)" name="itemSelection"> <p class="winEquLose" v-bind:name="'item'+item.MarketId" v-bind:id="'selectionname'+item.MarketId+select.SelectionId">{{select.SelectionName}}</p> <p class="winEquLoseOdds" v-bind:name="'item'+item.MarketId"> <span v-bind:id="item.MarketId+select.SelectionId" v-bind:maxlimit="select.MaxStakeLimit">{{select.BackOdds}}</span> <img src="img/upIng.png" style="width:0.2rem;display:none;" v-bind:id="'redOne'+item.MarketId+select.SelectionId" /> <img src="img/downIng.png" style="width:0.2rem;display:none;" v-bind:id="'greenOne'+item.MarketId+select.SelectionId" /> </p> </div> <div class="" style="width: 100%;height:0.45rem;"></div> </div> <div class="perchDiv" style="width: 100%;height:3rem;"></div> </div> </div> <!--竞猜记录--> <div class="downChangrTab guessRecord"> <div class="hide-body" id="dialogorders"> <div class="tableNameGuess"> <li>玩法</li> <li>选项</li> <li>赔率</li> <li>本金</li> <li>结果</li> </div> <ul style="background:#FFFFFF;height:4.79rem;overflow: scroll;"> <div class="guessedLists" id="contentOrders" v-for="(item,index) in orders"> <li> {{item.MarketName}} </li> <li> {{item.SelectionName}} </li> <li> {{item.FillPrice}} </li> <li> {{item.FillAmount}} </li> <li> <p v-if="item.Status == '0'"> 待确认</p> <p v-else-if="item.Status == '1'">订单正常</p> <p v-else-if="item.Status == '2'">{{item.NetReturn}}</p> <p v-else-if="item.Status == '3'">订单已被取消</p> <p v-else-if="item.Status == '4'">订单无效</p> <p v-else="item.Status == '5'">订单被拒绝，投注延迟期间发生重要事件等原因</p> </li> </div> </ul> </div> </div> <!--赛事事件--> <div class="downChangrTab" style="display: none;" v-if=""> <div class="login-body" id="contentCases"> <table class="whatHappen" v-if="cases.length >0"> <tr> <td></td> <td class="happenedMiddle"> <div class="happenedMiddle_top" style="margin-top: 0.4rem;"></div> </td> <td></td> </tr> </table> <table class="whatHappen" style="" v-for="(item,index) in cases" border="0" cellspacing="0" cellpadding="0"> <tr> <td></td> <td class="happenedMiddle"> <div class="happenedMiddle_line"></div> </td> <td></td> </tr> <tr v-if="item.CaseDescription.indexOf('主')>-1"> <td class="eventsHappendLeft_things"> <div class="eventsText"> <p class="eventsTextLeft_time">{{item.CaseMinutes}}'</p> <p class="eventsTextLeft_Country">{{item.CaseDescription}}</p> </div> </td> <td class="happenedMiddle"> <div class="eventsHappend_img"> <img :src="GetMatchEventImg(item.CaseDescription)" /> </div> </td> <td></td> </tr> <tr v-if="item.CaseDescription.indexOf('客')>-1"> <td></td> <td class="happenedMiddle"> <div class="eventsHappend_img"> <img :src="GetMatchEventImg(item.CaseDescription)" /> </div> </td> <td class="eventsHappendRight_things"> <div class="eventsText"> <p class="eventsTextRight_Country">{{item.CaseDescription}}</p> <p class="eventsTextRight_time">{{item.CaseMinutes}}'</p> </div> </td> </tr> <tr v-if="item.CaseDescription.indexOf('主')<0 && item.CaseDescription.indexOf('主')<0"> <td></td> <td> <a class="ti tlefoc">{{item.CaseMinutes}}'</a> <a class="titlefoc">{{item.DesChina}}</a> </td> <td></td> </tr> </table> <table class="whatHappen" v-if="cases.length >0"> <tr> <td></td> <td class="happenedMiddle"> <div class="happenedMiddle_line"></div> <div class="happenedMiddle_top"></div> </td> <td></td> </tr> </table> <!--<div style="width: 100%; height: 2.7rem;"></div>--> </div> </div> <!--技术统计--> <div class="downChangrTab" style="display: none;"> <div class="skillInfoGaryBg" id="stutsskillsData"> <div class="skillInfo" v-for="(item, index) in skillsData"> <li class="shotsOnTargets"> <div class="shotsOnTargets_left"> <p class="skillsTextFonts">{{item.AwayTeamValue}}</p> <div class="sotl_bg"> <div class="sotl_bgProgress"></div> </div> </div> <div class="shotsOnTargets_middle"> <img :src="GetMatchStatsImage(item.StatsType)" /> <p class="shills_name">{{item.StatsType}}</p> </div> <div class="shotsOnTargets_right"> <p class="skillsTextFonts">{{item.HomeTeamValue}}</p> <div class="sotl_bg"> <div class="sotl_bgProgress"></div> </div> </div> </li> </div> </div> </div> </div> <!--底部下单--> <div class="buttomOrder"> <!--金额输入--> <!--竞猜金额--> <div class="aboutMoney"> <input type="text" name="" id="betmoney" class="gussMoney" value="竞猜金额" placeholder="" readonly="readonly" v-model="gussMoney" /> <img src="img/clearBetMoney.png" class="clearGussMoney" id="clearGussMoney" /> <!--余额--> <span class="balanceMoney" id="minemoney">我的余额：888</span> <!--下注金额--> <div class="diffGussMoney" style="text-align:center;"> <ul> <li name="bettingmoney" class="difGuMonCom" val="100">+100</li> <li name="bettingmoney" class="difGuMonCom" val="500">+500</li> <li name="bettingmoney" class="difGuMonCom" val="1000">+1000</li> <li class="difGuMonCom" id="allin" style="line-height: 0.5rem;"> <p style="height: 0.3rem;">All <span style="margin-left: 0.05rem;">in</span></p> <p id="allinvalue" style="height: 0.3rem;">100</p> </li> </ul> </div> <!--确定--> <p class="subSure subSureRed" style="text-align:center;" onclick="CreateOrder();" id="subSure"> 确定 </p> </div> </div> <!--下单成功后遮罩层--> <div id="overlay" class="overlay"></div> </div> <div> <img src="img/goal/goalball.png" /> <img src="img/goal/goal.png" /> <img src="img/goal/fireworks.png" /> </div> <script src="js/jquery-1.10.2.min.js" type="text/javascript" charset="utf-8"></script> <script src="js/vue.min.js" type="text/javascript" charset="utf-8"></script> <script src="js/common.js?ver=012902" type="text/javascript" charset="utf-8"></script> <script src="js/jquery.cookie.min.js"></script> <script src="js/mask.js?ver=012901"></script> <script type="text/javascript" src="js/eventDetailsNew.js?ver=012908"></script> <script src="../js/animation.js"></script></body></html>感谢各位的阅读！关于“HTML5中Canvas图像模糊的示例分析”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，让大家可以学到更多知识，如果觉得文章不错，可以把它分享出去让更多的人看到吧！
