Scanner | QR code/barcode recognition | Computer Vision library
kandi X-RAY | Scanner Summary
kandi X-RAY | Scanner Summary
QR code/barcode recognition, ID card recognition, bank card recognition, license plate recognition, picture text recognition, yellow image recognition, driver's license (driver's license) recognition
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Top functions reviewed by kandi - BETA
- Display preview frames
- Get scaled rectangle
- Get MultiFormatReader reader
- Compute NV21
- Initializes the View
- Stops camera
- Parses data
- Set auto focus area
- Get display orientation
- Click on btn2
- Decode id card
- Convert a byte array to a Bitmap
- Detect licensePlate
- Returns the state of the given integer
- Region > measure
- Called when a sensor has changed
- Enables flash mode
- Method to initialize the registizer
- Returns list of faces
- Load a bitmap code
- Rotate an NV21 curve
- Decode IdCard2
- Create QR Code
- Decodes bank card
- Creates a bitmap from the supplied contents
- Returns the driving license string
Scanner Key Features
Scanner Examples and Code Snippets
Lines of Code : 53License : Permissive (MIT License)
Copypublic static void main(String[] args) {
Scanner in = new Scanner(System.in);
final int width;
final int height;
final int octaveCount;
final float persistence;
final long seed;
final String ch public static int getTotalNumberOfLinesUsingScanner(String fileName) {
int lines = 0;
try (Scanner scanner = new Scanner(new FileReader(fileName))) {
while (scanner.hasNextLine()) {
scanner.nextLine();
Community Discussions
Trending Discussions on Scanner
QUESTION
I'm writing a word-guessing game code. The main calls the inputTake method, which asks for input of a word consisting 5 English letters only, and returns is. Before returning the word, it calls another method, checkInput, to make sure the input is valid. If the input isn't valid, the checkInput method prints an error message and calls inputTake to let the user try again.
But when the first input is invalid, checkInput calls inputTake and then the second input is valid everything seems to work alright. The problem is that the method returns the first, invalid input, and not the valid input.
I tried initializing Scanner in the main and giving it to the method as parameter, but that doesn't help.
Below is the code I wrote, any thoughts? Any help is welcome
Main:
...ANSWER
Answered 2022-Apr-04 at 08:51As mentioned in the comments, the problem is that your inputTake() call inside checkInput() doesn't do what you want. You can try this:
QUESTION
I'm experimenting with Chaum's blind signature, and what I'm trying to do is have the blinding and un-blinding done in JavaScript, and signing and verifying in Java (with bouncy castle). For the Java side, my source is this, and for JavaScript, I found blind-signatures. I've created two small codes to play with, for the Java side:
...ANSWER
Answered 2021-Dec-13 at 14:56The blind-signature library used in the NodeJS code for blind signing implements the process described here:
BlindSignature.blind()generates the SHA256 hash of the message and determines the blind message m' = m * re mod N.BlindSignature.sign()calculates the blind signature s' = (m')d mod N.BlindSignature.unblind()determines the unblind signature s = s' * r-1 mod N.BlindSignature.verify()decrypts the unblind signature (se) and compares the result with the hashed message. If both are the same, the verification is successful.
No padding takes place in this process.
In the Java code, the implementation of signing the blind message in signConcealedMessage() is functionally identical to BlindSignature.sign().
In contrast, the verification in the Java code is incompatible with the above process because the Java code uses PSS as padding during verification.
A compatible Java code would be for instance:
QUESTION
It was working fine before I have done nothing, no packages update, no gradle update no nothing just created new build and this error occurs. but for some team members the error occur after gradle sync.
The issue is that build is generating successfully without any error but when opens the app it suddenly gets crash (in both debug and release mode)
Error
...ANSWER
Answered 2022-Feb-25 at 23:22We have fixed the issue by replacing
QUESTION
I tried to check a String input that is a valid date using the format dd/MM/yyyy like this:
ANSWER
Answered 2022-Feb-10 at 21:28There are two things you need to change in your formatter:
- Use
uuuuinstead ofyyyy. It's easy to try the latter, butymeans "year within ERA". It doesn't know whether it's BC or AD.umeans "year" including ERA information. - The default resolver style is
SMART. Use.withResolverStyle(ResolverStyle.STRICT)to return a strict copy of the formatter.
QUESTION
I have recently upgraded my app from SDK 40 to SDK 44 and came across this error App.js: [BABEL]: Unexpected token '.' (While processing: /Users/user/path/to/project/node_modules/babel-preset-expo/index.js)
Error Stack Trace:
...ANSWER
Answered 2021-Dec-21 at 05:52can you give your
- package.json
- node version
I think that's because of the babel issue / your node version, because it cannot transpile the optional chaining https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Optional_chaining
maybe tried using latest LTS node version? because as far as I know, the latest LTS node version already support optional chaining
QUESTION
After updating my npm packages, some of the imports from the 'vue' module started showing errors:
TS2305: Module '"../../node_modules/vue/dist/vue"' has no exported member 'X'
where X is nextTick, onMounted, ref, watch etc. When serving the project, Vue says it's "failed to compile". WebStorm actually recognizes the exports, suggests them and shows types, but the error is shown regardless. Some exports like computed and defineComponent work just fine.
What I've tried:
- Rollback to the previously used Vue version "3.2.2" > "3.0.11". It makes the abovementioned type errors disappear, but the app stops working entirely, showing lots of
TypeError: Object(...) is not a functionerrors in console and not rendering the app at all. In the terminal, some new warnings are introduced:"export 'X' (imported as '_X') was not found in 'vue'where X is createElementBlock, createElementVNode, normalizeClass and normalizeStyle. - Rollback other dependencies. None of the ones that I tried helped fix the problem, unfortunately.
- Manually declare the entirety of 'vue' module. We can declare the 'vue' module exports in shims-vue.d.ts, and it actually makes the errors disappear, however, this seems like a terrible, time-consuming workaround, so I would opt out for a better solution if possible.
My full list of dependencies:
...ANSWER
Answered 2021-Aug-15 at 13:53That named exports from composition API are unavailable means that vue is Vue 2 at some place which has only default export. Since Vue 3 is in dependencies and both lock file and node_modules were refreshed, this means that Vue 2 is nested dependency of some direct dependency.
The problem needs to be investigated in lock file. It shows that @vue/cli-plugin-unit-jest@4.5.13 depends on vue-jest@3 which depends on vue@2.
A possible solution is to upgrade @vue/cli-plugin-unit-jest to the latest version, next. The same likely applies to other @vue/cli-* packages because they have matching versions.
QUESTION
I'm using FileSystemWatcher to monitor a folder where documents are scanned to. When a new file is detected, it will send an email to notify someone. It's working as is, but sometimes (not every file) it will trigger 2 or 3 times on a new file and send the email 2-3 times for the same file. I'm guessing it has to do with the way the file is created by the scanner or something like that.
I'm trying to figure out a way to protect against this happening, to ensure it only sends one email per file. Any suggestions would be greatly appreciated.
...ANSWER
Answered 2021-Dec-01 at 14:00This may be because you listen too many notifications. The default is LastWrite, FileName, and DirectoryName
FileName is sufficient for your need and may prevent your issue.
QUESTION
I have written a method which asks user to press enter to continue and timeouts after some time. I am facing difficulty in writing Junit tests for this method use Mockito. Below is the method.
...ANSWER
Answered 2022-Jan-14 at 11:58I would say you need to slightly change your method, take the callable object out of method and pass it as a parameter, this should solve your problem with mocking.
QUESTION
Because of Google Play, I had to update an old project of mine to the latest expo versions (version 43.0.0 to be exact). The idea is for the app to scan a QRCode and process the data, simply. However, expo-barcode-scanner only works once and after that I need to close and open the app again to work. Has anyone encountered this problem and (or) knows how to solve it? Below is my code:
...ANSWER
Answered 2021-Nov-12 at 21:14Welcome @Backup Gov18,
This is a documented issue.
Note: Only one active BarCodeScanner preview is supported currently. When using navigation, the best practice is to unmount any previously rendered BarCodeScanner component so the following screens can use without issues.
There is a workaround.
Instead of conditionally rendering the component, you could render it inside another dedicated screen component.
This way, after this new screen reads the barcode, you could navigate back to your first screen. Navigating back may unmount this new screen. You can force unmount if you need to.
As you are using react-navigation, you had better use .pop() instead of goBack().
You can also use expo-camera instead of expo-barcode-scanner. expo-camera does not have this issue. It also offers more options like flashlight/torch and switching cameras.
QUESTION
beginner here I have searched anywhere but I can't seem to find any solution or problems related to mine. I've just started learning java and Here is my problem:
I have a working code where the input is split by "/":
...ANSWER
Answered 2022-Jan-10 at 14:33The problem is caused by d.next(), you should use d.nextLine() insted.
to understand why you should check this quesiton What's the difference between next() and nextLine() methods from Scanner class?
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install Scanner
You can use Scanner like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the Scanner component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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