LPR | Android 车牌识别--OCR | Android library
kandi X-RAY | LPR Summary
kandi X-RAY | LPR Summary
Android 车牌识别--OCR
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Top functions reviewed by kandi - BETA
- Analyze image
- Copy assets
- Initializeognizer
- Convert image to image
- Opens camera with given id
- Stops the camera
- Sets the camera preview size
- Initializes the camera preview
- Sets this matrix to the given values
- Complete computing state
- Initializes OpenCV libs
- Convert a vector into a Mat2CV matrix
- Initialize the viewfinder
- On draw
- Calculates the values of a camera matrix
- Calculate the hash code
- Returns a 16 bit hash code
- Convert a vector to a Matcher
- Finds a rectified rectangle
- Set the camera preview size
- Convert vector to mat
- Opens a camera
- Convert a vector to a matrix
- Connects to the camera
- Register a new package
- Called when a view is drawn
LPR Key Features
LPR Examples and Code Snippets
Community Discussions
Trending Discussions on LPR
QUESTION
In CameraX Analysis, setTargetResolution(new Size(2560, 800), but in Analyzer imageProxy.getImage.getWidth=1280 and getHeight=400, and YUVToByte(imageProxy.getImage).length()=768000。In Camera, parameter.setPreviewSize(2560, 800) then byte[].length in onPreviewFrame is 3072000(equales 768000*(2560/1280)*(800/400))。How can I make CameraX Analyzer imageProxy.getImage.getWidth and getHeight = 2560 and 800, and YUVToByte(ImageProxy.getImage).length()=3072000? In CameraX onPreviewFrame(), res always = null, in Camera onPreviewFrame(), res can get currect value, what's the different between CameraX and Camera? And what should I do in CameraX?
CameraX:
...ANSWER
Answered 2021-Jun-13 at 01:15With regards to the image analysis resolution, the documentation of ImageAnalysis.Builder.setTargetResolution() states that:
The maximum available resolution that could be selected for an ImageAnalysis is limited to be under 1080p.
So setting a size of 2560x800 won't work as you expect. In return CameraX seems to be selecting the maximum ImageAnalysis resolution that has the same aspect ratio you requested (2560/800 = 1280/400).
QUESTION
I have migrated from Quasar v1 to Quasar v2, and in doing so have moved to Vue 3. I have the code below that worked in Quasar v1 (Vue v2), but now when running in Quasar v2 (Vue v3) I get the following error message in the console when selecting a filter:
...ANSWER
Answered 2021-May-28 at 22:32The migration guide for vue-router 4 doesn't say explicitly, but you can no longer ref the child component via the tag itself. There is a new paradigm mentioned for handling the child's slots that turns out to work for your use case as well; here's the adjusted code:
QUESTION
ANSWER
Answered 2021-Apr-26 at 05:36For people coming across this Q I was able to solve it by:
QUESTION
I've been working on a little tool the past few days and the functionality itself is fine. I wanted to make the tool a little nicer to work with (at least for me) and included a sound-file (called test.wav) which plays one of my favorite songs.
The idea was that the song constantly repeats itself but after one go through, the music stops. This is my code-snippet for the music-part:
...ANSWER
Answered 2021-Apr-04 at 14:07The PlaySound function is (still) documented
The interesting setting is in the third parameter fdwSound and there what is said about SND_LOOP:
SND_LOOP The sound plays repeatedly until PlaySound is called again with the pszSound parameter set to NULL. If this flag is set, you must also set the SND_ASYNC flag.
Note the last sentence. So the proper call would be:
QUESTION
This ANTLR4 parser grammar errors a 'no viable alternative' error when I try to parse an input. The only rules I know of that matches the part of the input with the error are the rules 'retblock_expr' and 'block_expr'. I have put 'retblock_expr' infront of 'block_expr' and put 'non_assign_expr' infront of 'retblock_expr' but it still throws the error.
input:
print(do { return a[3] })
full error:
line 1:11 no viable alternative at input '(do { return'
parser grammar:
...ANSWER
Answered 2021-Mar-27 at 14:13Your PRINT token can only be matched by the blk_expr rule through this path:
There is no path for retblock_expr to recognize anything that begins with the PRINT token.
As a result, it will not matter which order you have elk_expr or retblock_expr.
There is no parser rule in your grammar that will match a PRINT token followed by a LPR token. a block_expr is matched by the program rule, and it only matches (ignoring wsp) block_expr or retblock_expr. Neither of these have alternatives that begin with an LPR token, so ANTLR can't match that token.
print(...) would normally be matched as a function call expression that accepts 0 or more comma-separated parameters. You have no sure rule/alternative defined. (I'd guess that it should be an alternative on either retblock_expr or block_expr
That's the immediate cause of this error. ANTLR really does not have any rule/alternative that can accept a LPR token in this position.
QUESTION
When I run my grammar (lexer and parser) in powershell, it produces these errors:
...ANSWER
Answered 2021-Mar-23 at 10:50Both global and a are listed in your grammer under kwr rule.
kwr is mentioned in the inl rule which isn't used anywhere. So your parser don't know how to deal with inl and don't know what to do with two inl chained together (global a)
QUESTION
The Software Developer's Manual gives this sequence as a simple example:
...ANSWER
Answered 2021-Mar-23 at 20:37Using java you will have to write the hex representation of the commands you want to send.
Then from java you will need to call lpr -P Brother-TD4750 -l brotherHexVersion.txt
https://explainshell.com/explain/1/lpr
How to run Linux commands in Java?
These answers will give you more insight on other problmens you might encounter:
QUESTION
I am lost with the layout of Quasar and don't understand it, although I've read the documentation of it.
The scaffolder gave me the following code. But this makes the Drawer on the left side. How can I put it to the right side?
...ANSWER
Answered 2021-Feb-16 at 20:35you can set the behavior to side="right"
QUESTION
I am trying to make a calculator using Tkinter in Python. I use a for loop to draw the buttons in, and I'm trying to use lambda functions so the buttons' actions are only called when pressed instead of calling right when the program starts. When I attempt this, however, a "list index out of range" error is thrown.
This is the relevant section which draws the buttons and sets their processes:
...ANSWER
Answered 2021-Feb-10 at 05:05This is a classic case of unwanted closure. Here's a simplified example:
QUESTION
I have a Brother printer with following configuration:
...ANSWER
Answered 2021-Jan-27 at 16:58The issue was my cups.conf file.
Since I was mostly in office so the the cups server of office was configured
I edited /etc/cups/client.conf file with
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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No vulnerabilities reported
Install LPR
You can use LPR 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 LPR 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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