After using Avfoundation to complete the scan code, there are 2 problems:
1, how to limit the scan range?
2. How is the barcode scanned?
A friend's article helped me, specially transferred, can help the needy friend.
Original: http://www.2cto.com/kf/201411/356046.html
The main reason for writing this article is not to show how to use avfoundation for QR code scanning, but also to limit th
The main reason for writing this article is not to show how to use avfoundation for QR code scanning, but also to limit the scope of scanning QR code. (Because the default is full screen scanning)The project encountered the function of scanning QR code, here I gave up the use of the three-party library, and the introduction of Apple native scan. The advantage of native is that the scan is particularly fast
The author of this article is original, reproduced please indicate the source: http://www.cnblogs.com/further-further-further/p/7717331.htmlSolve the problemThe business logic Bean is registered into the spring container through Component-scan automatic scanning, and the XML configuration file bean is removed from the manual registration process, which reduces the complexity of XML configuration file.Content Description 1. When registering a
Use index quick full scan (indexffs) to avoid full table scan reference: IndexFastFullScanUsageToAvoidFullTableScans (DocID70135.1) applicable to: OracleDatabase
Use index quick Full Scan (Index ffs) To Avoid Full Table Scan reference: index Fast Full Scan Usage To Avoid Ful
[Translated from mos] Using index quick full scan (index ffs) to avoid full table scan, mosffs
Using index quick full scan (index ffs) to avoid full table Scan
Reference Original:Index Fast Full Scan Usage To Avoid Full Table Scans (Doc ID 70135.1)
Applicable:Oracle Database
Error: When connecting to the database: SQL Server detected consistency-based logical I/O error checksum is incorrectC:\Documents and settings\administrator> "C:\Program Files\Microsoft SQL Server\100\setup Bootstrap\release\ Setup.exe "/q/action=rebuilddatabase/instancename=mssqlserver/sqlsysadminaccounts=administrator/sapwd=passwordAfter execution is OK, more details, see:MS SQL Server R2 installed on the local computer may cause the SQL Server service to fail to start due to hard disk causes,
How to configure Nessus and Nessus vulnerability scan in the nessus vulnerability scan tutorialHow to configure Nessus In the Nessus vulnerability scan tutorial
After the Nessus tool is successfully installed, you can use it to perform vulnerability scanning. To better use the tool, we will introduce the related settings of the tool, such as service start, softwa
In the use of QQ scan two-dimensional code before we want to ensure that our QQ is the latest version of the QQ, so as to ensure that the function of scanning two-dimensional code.
First step
We install QQ software on our mobile phone.
Second Step
After opening QQ Click "Message", then we want to scan the function is in "contact", so select contact person.
Third Step
Then we click on "Cont
[Translated from mos] SYS_OP_ C2C full table scan (fts)/full index scan, sys_op_c2cfts
SYS_OP_ C2C full table scan (fts)/full index Scan
Reference Original:SYS_OP_ C2C Causing Full Table/Index Scans (Doc ID 732666.1)
Applicable:Oracle Database-Enterprise Edition-Version 10.1.0.2 to 12.1.0.1 [Release 10.1 to 12.1]Inform
Port Scan path:What is a scanner?A scanner automatically detects remote or local host security vulnerabilities.ProgramBy using a scanner, you can discover the distribution of various TCP ports on the remote server and the services provided and their software versions! This allows us to indirectly or intuitively understand the security problems of remote hosts.
Working PrincipleThe scanner collects a lot of useful information about the target host (f
The earlier interview was asked what the scanning use of the Zbar, and then asked why not the original, more efficient ah, saying that just started to achieve, do not seek efficiency, also do not know how to answer. Now in retrospect, the best answer is: Need to scan the album, the original implementation is not AH.Zbar Advantages: You can achieve photo scanning of albums But the efficiency is a little low.Native: High efficiency, but unable to do pho
When we are in the zxing framework to scan the QR code, we will find that now the mobile phone with the resolution of the addition. The scanning box will be smaller, the 1920*1280 and 1280*720 are relatively normal. But Samsung's several mobile phone note4,5. S6, such as several mobile phone resolution up to 2560*1440, even some phones up to 3660 of the bar can't remember.When these phones scan, pop-up
There is a need to scan the QR code on the project, and the more mature framework is zbar,zxing. But each has the superiority, the individual thinks still is zbar to the scanning package efficiency is relatively higher, at that time I do is scans some zbar, recognizes this map library
There are some zxing, Later found that zbar in the android5.0 above causes the project to crash directly, because of the lack of the cpu64 bit of so file, due to lack
Label:0. ReferencesTable Scan, Index Scan, index Seek SQL Server–index Seek vs. Index Scan–diffefence and Usage–a simple Note How Oracle tables are accessed Difference between index seek and index scan and where applicableHow to access tables in 1.oracleIn Oracle, where table access is described, the data in the Access
ID scan recognition, mobile ID card OCR scan recognitionFirst, Product descriptionWen Tong ID card scanning recognition system is a platform-based ID scan recognition application developed by our company, which supports Android,iOS, Linux,windows And many other mainstream mobile operating systems. This product uses the mobile phone, the tablet computer camera to
The index unique scan, which is a scan of a unique index, applies only to the target SQL that is the equivalent query in the WHERE condition. Because the scanned object is a unique index, the results of the index uniqueness scan will return at most one record. Empno is primary key in the EMP table, corresponding to a unique index [Email protected]> SELECT * from
The mac uses the masscan scan port. I think the scan effect is between nmap and zmap, And the masscannmap
Address: https://github.com/robertdavidgraham/masscan
Download, decompress, cd, and make. Then, copy the executable file masscan in the bin to/usr/local/bin for convenient calling.
Root permission execution
Masscan-p 80 8/16 ..-oX mas. log
The scan
Use ZBar in iOS to scan the QR code and customize the scan interfaceZXing has been used in Android to identify QR codes. ZXing also has the corresponding iOS version. After understanding it, ZBar is also a common QR code recognition software, the sdks for iOS and Android are provided for use. Finally, I chose ZBar for QR code identification. The annotations are clear and easy to use.ZBar provides two usage
oracle| Index
In oracle9i we know that we can use the Jump Index Scan (index Skip Scan). However, there are some limitations to the use of jumping index scans.
From Oracle's documentation we can find this:
Index Skip Scans
Index skip scans improve index scans by Nonprefix columns.
Often, scanning index blocks is faster than scanning table data blocks.
Skip scanning lets a composite index is split logical
1, the method is very simple, only need you to click on Micro bo, open after we click on the upper right corner of the "sweep" on it Oh, specific as follows.
2, then we click on the "Allow" button in the pop-up permission reminder (must click Allow OH).
3, and then you can like the micro-letter of the same recruit, using a camera to the two-dimensional code can be scanned.
Mobile micro-blog Scan
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