fingerprint

问题 I wonder if we can change the fingerprint in the google console developper without deleting the application? My problem is that in debug mode the keystore is different so the sha1 too. I'm on eclipse Thx 回答1: ok I found it is possible on Developers console, Project => API & Auth => IDs 来源： https://stackoverflow.com/questions/26123517/how-to-change-fingerprint-in-google-console

问题 I am trying to determine the core and delta points of a fingerprint. I'm using the Poincaré index method, but I am unable to successfully detect this points and I can't figure out why. First I divide the image in 15x15 blocks, then I calculate the x and y gradients which i use in obtaining the orientation map. After getting the mean orientation for each block then i apply the Poincaré index method, described in the image below (credits: Handbook of Fingerprint Recognition, Davide Maltoni):

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . I am starting my final year project and need an SDK for a fingerprint reader. I have a microsoft fingerprint scanner. I am planning to use Java & Eclipse under Windows 8 to develop the project. If anybody has heard / uses a free SDK I would like to hear from you ! 回答1: I know only VeriFinger Embedded SDK it's

问题 I want find out, if two audio files are same or one contains the other. For this I use Fingerprint of musicg byte[] firstAudio = readAudioFileData("first.mp3"); byte[] secondAudio = readAudioFileData("second.mp3"); FingerprintSimilarityComputer fingerprint = new FingerprintSimilarityComputer(firstAudio, secondAudio); FingerprintSimilarity fingerprintSimilarity = fingerprint.getFingerprintsSimilarity(); System.out.println("clip is found at " + fingerprintSimilarity.getScore()); to convert

问题 if i wanted to perform an iris scan, would i need any additional api's or can i just use whats readily available? 回答1: You don't need any new APIs to do biometrics as such, but specialized biometric APIs do exist. They're typically most helpful if you want to make inter-platform information sharing easier, skip some of the boring parts of writing image acquisition/storing programs, that sort of thing. Writing code that's compatible with all the relevant biometric standards can get pretty gory

问题 I am implementing a custom 'swipe to unlock' screen. If the 'Screen lock' in settings is 'Swipe', my app work properly. In my custom 'swipe to unlock' screen -> User swipe to unlock -> it unlocks phone and go to home screen directly by adding the code below in my activity: activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD); activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED); The problem arises when the 'Screen lock' in settings is 'PIN

问题 I'm capturing fingerprints using a device called Secugen Pro 20, it has its own SDK for Linux, and i want to capture the fingerprint image and save it as any image format . They have this typedef unsigned char BYTE; I declared my imageBuffer BYTE *CurrentImageBuffer; Then i allocate memory to it using the devices specs CurrentImageBuffer = malloc(device_info.ImageWidth*device_info.ImageHeight); And at some point at my code i capture image and pass CurrentImageBuffer as argument to the capture

问题 On my fingerprint scanner, the fingerprints are stored in the device itself. I'm sure that this is the same as most of them. How do the scanners protect/encrypt the fingerprint data, so that someone can't extract this information directly from the scanner and use it to authenticate? I know that this would require serious skill, but I'm sure that I'm not the only one who has thought of the possibility. 回答1: Fingerprint devices typically do not encrypt or store your fingerprint data. What

问题 I'm want to encrypt and decrypt files from SD-card using AES. In order to do it we always need a seed (usually a string which is inserted by user as a password): public static byte[] generateKey(String password) throws Exception{ byte[] keyStart = password.getBytes("UTF-8"); KeyGenerator kgen = KeyGenerator.getInstance("AES"); SecureRandom sr = SecureRandom.getInstance("SHA1PRNG", "Crypto"); sr.setSeed(keyStart); kgen.init(128, sr); SecretKey skey = kgen.generateKey(); return skey.getEncoded(

问题 We want to create a unique machine id - key fingerprint, in order to use it to identify a PC(s) over a secure network (probably ssl/tls), so that we are sure that the server delivers to the certain PC , and not to someone who has stolen the license. The pc(s) will be on Linux OS. How should we do it? 回答1: Couple of suggestions. Create a unique hashing algorithm that hashes the computer name and MAC address together, sends the hash back to the secure server, and stores it in a binary file on