英文:
Convert Fingerprint Image to Template with Java
问题
我正在尝试将一个格式为jpg的指纹图像转换为模板，使用的是SourceAFIS库https://sourceafis.machinezoo.com/。但我收到了一些看起来不像模板（Minutiae数据）的字节，有什么建议可以实现这个目标？
File[] images = directory.listFiles();
File desiredfile = null;
for (File file : images) {
if (file.getName().equals("images.jpg")) {
desiredfile = file;
break;
}
}
FingerprintTemplate template = null;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
template = new FingerprintTemplate(
new FingerprintImage(
Files.readAllBytes(desiredfile.toPath()),
new FingerprintImageOptions().dpi(500)));
}
fileLogger.log("template " + template.toByteArray());
结论：
似乎Minutiae数据是隐藏的，我们无法看到实际的字节，该库旨在使用模板对象进行匹配过程。
英文:
I am trying to convert a fingerprint image with format jpg to a template using the library
SourceAFIS
https://sourceafis.machinezoo.com/
But I am receiving a few bytes that doesn't look like template (Minutiae data), any suggestions to achieve this goal?
File[] images = directory.listFiles();
File desiredfile = null;
for (File file : images) {
if (file.getName().equals("images.jpg")) {
desiredfile = file;
break;
}
}
FingerprintTemplate template = null;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
template = new FingerprintTemplate(
new FingerprintImage(
Files.readAllBytes(desiredfile.toPath()),
new FingerprintImageOptions()
.dpi(500)));
}
fileLogger.log("template " + template.toByteArray());
Conclusion:
It seems the minutiae data is hidden and we can not see the actual bytes, the library aims to use the template object for matching process.
答案1
得分: 1
请确保代码如下所示。
public class FingerprintConverter {
public static void main(String[] args) {
// 用实际的图像文件路径替换 "path/to/fingerprint/images.jpg"
String imagePath = "path/to/fingerprint/images.jpg";
Path imagePath = Paths.get(imagePath);
if (!Files.exists(imagePath) || !Files.isRegularFile(imagePath) || !Files.isReadable(imagePath)) {
System.err.println("无效的图像文件: " + imagePath);
return;
}
try {
byte[] imageBytes = Files.readAllBytes(imagePath);
// 步骤 3: 提取指纹模板
FingerprintImage fingerprintImage = new FingerprintImage(
imageBytes,
new FingerprintImageOptions().dpi(500)
);
FingerprintTemplate template = new FingerprintTemplate(fingerprintImage);
// 记录模板信息
System.out.println("模板大小: " + template.toByteArray().length + " 字节");
} catch (IOException e) {
System.err.println("读取图像文件时出错: " + e.getMessage());
}
}
}
英文:
Code should be like this.
Make sure to replace "path/to/fingerprint/images.jpg" with the actual path to your fingerprint image. The code now includes error handling for file-related operations and logs the template size to the console.
public class FingerprintConverter {
public static void main(String[] args) {
// Replace "path/to/fingerprint/images.jpg" with the actual image file path
String imagePath = "path/to/fingerprint/images.jpg";
Path imagePath = Paths.get(imagePath);
if (!Files.exists(imagePath) || !Files.isRegularFile(imagePath) || !Files.isReadable(imagePath)) {
System.err.println("Invalid image file: " + imagePath);
return;
}
try {
byte[] imageBytes = Files.readAllBytes(imagePath);
// Step 3: Extract the fingerprint template
FingerprintImage fingerprintImage = new FingerprintImage(
imageBytes,
new FingerprintImageOptions().dpi(500)
);
FingerprintTemplate template = new FingerprintTemplate(fingerprintImage);
// Logging template information
System.out.println("Template size: " + template.toByteArray().length + " bytes");
} catch (IOException e) {
System.err.println("Error reading image file: " + e.getMessage());
}
}
}
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