我开发了一个使用Java的Web应用程序,并在BackEnd中播放框架,在FrontEnd中使用AngularJS。集成指纹U.are.U SDK与Java Web应用程序的错误
我与U.are.U SDK进行了指纹扫描集成,但是在尝试比较两个相同的指纹时出现错误。
这是我在角部位代码:
if(currentFormat == Fingerprint.SampleFormat.PngImage){
localStorage.setItem("imageSrc", "");
var samples = JSON.parse(s.samples); //parse json
var finger = Fingerprint.b64UrlTo64(samples[0]); // convertion to Base64
localStorage.setItem("imageSrc", "data:image/png;base64," + finger);
var vDiv = document.getElementById('imagediv');
vDiv.innerHTML = "";
var image = document.createElement("img");
image.id = "image";
image.src = localStorage.getItem("imageSrc");
vDiv.appendChild(image);
AuthService.fingerValidation(finger, vm.username, function(response){
showMessage("Login biométrico", response);
});
}
我在哪里拍摄的这个SDK的JavaScript API的指纹。
然后,他发出了Base64编码字符串到Web服务,并按照以下步骤进行:
UserFingerPrint print = fingerprintService.getFinderByUser(data.getUsername()); //Db data
if (print != null) {
String equals = "";
//'finger' is the base64 String from JavaScript
//Convert finger to byte[]
byte[] bytesImage = fingerprintService.getFMD(Base64.decodeBase64(finger), "first");
//Convert byte[] to FMD format from SDK with parameters of image example
Fmd fmd = UareUGlobal.GetEngine().CreateFmd(bytesImage, 320, 350, 500, 1, 3407615, Fmd.Format.ANSI_378_2004);
//Image from DB
byte[] imageDB = fingerprintService.resizeImage(print.getImage());
Fmd fmd2 = UareUGlobal.GetEngine().CreateFmd(imageDB, 320, 350, 500, 1, 3407615, Fmd.Format.ANSI_378_2004);
//The error is when comparing with the following method.
//The fingerprint is always different, even if it is the same image.
int falsematch_rate = UareUGlobal.GetEngine().Compare(fmd, 0, fmd2, 0);
int target_falsematch_rate = Engine.PROBABILITY_ONE/100000;
if (falsematch_rate < target_falsematch_rate) {
equals = "match success";
} else {
equals = "No match"
}
}
有没有人转换的图像口蹄疫,可以帮助我吗? 谢谢!
你的输入图像是PNG格式吗?你如何获得这张图片?这张图片是从哪里来的? – LaurentY
是的,它是一个PNG图像,这是通过javascript和相同的Digital Persona API获得的前端。这个图像是在Base64中生成的,我随后建立了一个图像以显示在html –