《机器视觉与机器学习应用》课件-二维码识别应用

机器视觉与机器学习应用ApplicationsofMachineVisionandMachineLearning二维码识别应用ApplicationsofQRCode

Recognition购物支付Shoppingpayment信息获取Informationacquisition产品追溯Producttraceability课

程

导

入CourseIntroduction陈

雨ChenYU课

程

导

入CourseIntroduction二维码是如何被识别的呢?

How

isQRcode

recognized?二维码识别应用ApplicationsofQRCode

Recognition二维码识别应用Applications

of

QR

Code

Recognition*

二维码：生产日期、批次号等重要信息

QRcode:productiondate,batchnumberand

other

important

information.快速准确地识别，以确保产品质量和追

溯

效

率

。Fastandaccurate

identificationtoensure

productquality

andtraceability

efficiency.案例导入Case

introduction实际任务——利用视觉套件采集牛奶盒

图像并识别二维码Practical

task-using

the

vision

kit

to

capture

milk

carton

imagesandidentify

QR

code.*

二维码识别的原理和操作步骤Principlesandsteps

ofQR

code

recognition案例导入Case

introduction二维码概念ConceptofQR

Code*

二维码是特定几何图形按照一定规律在二维方

向上组合排列构成的黑白相间的能记录数字符

号等的信息图案。AQRcode

isa

black

and

white

pattern

composed

ofspecific

geometric

shapes

arranged

in

two

dimensions

according

to

a

certain

pattern,which

can

record

information

such

as

digital

symbols.在代码编制上巧妙地利用构成计算机内部逻辑

基础的“O”、“1”比特流的概念，使用若干个与二进制相对应的几何形体来表示文字数值信息，

通过图象输入设备或光电扫描设备自动识读以

实现信息自动处理。In

code

compilation,the

QR

code

cleverly

utilizes

the

conceptof

"O"and"1"bit

streams

that

constitute

the

internal

logic

basisof

the

computer,uses

several

geometric

shapes

corresponding

to

binary

to

represent

textual

numerical

information,and

isautomatically

read

by

image

input

devices

or

photoelectricscanning

devices

to

realize

automatic

information

processing.二

维

码QR

code打开手机微信/支付宝，扫描二维码Open

WeChat/Alipay

to

scan

the

QR

code二维码的种类和特点

TypesandCharacteristics

ofQR

Codes*

矩阵式二维码也即棋盘式二维码是指将深色小方块、浅色小方块分布在矩形中并通过方块

见的不同组合方式来表示符号信息的二维码，主要有QR

码、Data

Matrix、Maxi

Code、

Vericode码等码制。MatrixQR

code,also

known

as

a

checkerboard

QR

code,is

aQR

code

that

distributes

dark

and

light

small

squares

ina

rectangle

and

uses

different

combinations

of

squares

to

represent

symbolicinformation.The

main

code

systemsinclude

QR

code,Data

Matrix,Maxi

Code,Vericode,etc.根据结构进行划分，二维码可分为两种类型：矩阵式二维码和排列式二维码。

Basedonthestructure,QRcodescanbe

divided

intotwotypes:matrixQR

codes

and

array

QR

codes.二维码的种类和特点TypesandCharacteristicsofQR

Codes矩阵式二维码MariQBsodeQR

码QR

codeQR码是在一个矩形空间通过黑、白像素在矩阵中

的不同分布进行编码。在矩阵相应元素位置上，用

点(方点、圆点或其他形状)的出现表示二进制“7”,点的不出现表示二进制的“O”,

点的排列组

合确定了矩阵式二维条码所代表的意义。A

QR

code

is

encodedwithin

arectangularspacethroughthe

varying

distribution

of

black

and

white

pixels

within

amatrix.

The

presence

of

a

dot(square,round,or

other

shape)at

thecorresponding

element

in

the

matrix

represents

a

binary

"1,"while

the

absence

of

a

dot

represents

a

binary"O."Thearrangement

and

combination

of

the

dots

determines

the

meaning

of

the

matrix-like

two-dimensional

barcode.条形码的种类和特点TypesandCharacteristicsofBarcodesQR

码OR

code排列式二维码*

排列式二维码又称行排式二维码或堆积式二维码，是一种在一维码编码组成的基础上，按

需要将条码堆积成多行的二维码，因此其编码原理、校验方式以及适度原理都承继于一维

码，主要有PDF417、Code

16K码、CODE49等码制。The

array

QR

code

is

also

called

row-typeQR

code

orstacked

QR

code.It

is

atwo-dimensional

codethat

stacksbarcodes

into

multiple

rows

as

needed

based

on

the

one-dimensional

code

encoding

composition.Therefore,itsencoding

principle,verification

method

and

appropriate

principle

are

inherited

from

the

one-dimensional

code.Themain

code

systems

include

PDF417,Code

16K,CODE49,etc.PDF417码Code

16K码

Code49码PDF417code

Code

16K

Code49二维码识别系统QRCode

RecognitionSystem*二维码随传送带高速移动，经过工

业相机读取二维码信息后将数据存

入云端，系统将各个条码背景信息

与二维码信息一一对应，对二维码

进行分类与处理。The

QR

code

moves

at

high

speed

along

theconveyor

belt.After

the

industrial

camera

readsthe

QR

code

information,the

data

is

stored

inthe

cloud.The

system

matches

the

backgroundinformation

of

each

barcode

with

the

QR

codeinformation

one

by

one,and

classifies

andprocesses

the

QR

code.工业相机光源二维码分类及信息云存储

二维码

二维码

二维码传送带二维码的种类和特点TypesandCharacteristics

ofQR

Codes典型的二维码识别系统TypicalQRcoderecognitionsystem*

针对二维码背景复杂、背景动态变

化快、噪声多等特点，利用高速CCD

工业相机在条码高速运动时，

迅速捕捉条码图像，并同时进行条

码背景信息采集与信息云存储。The

systemtargetsthe

characteristics

of

QR

codessuchascomplex

background,Fastdynamic

changes

and

high

noise.and

uses

ahigh-speed

CCD

industrialcameratoquickly

capture

barcode

imageswhenthe

barcode

is

moving

at

high

speed,and

simultaneouslycollects

barcode

background

information

andstores

it

in

the

cloud.工业相机光源二维码分类及信息云存储

二维码

二维码

二维码传送带二维码的种类和特点TypesandCharacteristics

ofQR

Codes典型的二维码识别系统TypicalQRcoderecognitionsystem条形码识别流程Barcode

Recognition

Process图像预处理Imagepreprocessing二维码识别的图像预处理一般采取的

操作有：灰度变换、

二值化

、

滤波去噪

、

几

何

变

换

等

。QRcoderecognitioninclude:grayscaletransformation,binarization,Filteringand二维码识别QR

coderecognition二维码经图像处理后得到的图像，便可以对图像中信息进行译码，即二维码识别。Theimage

obtained

aftertheQRcode

is

processedcanbe

usedto

decode

the获取图像Imageacquisition工业相机采集包含

待检测外观信息的图

像

。Industrial

camerascontaining

appearanceinformation

tobedetected.图像分析Imageanalysis图像分析主要是进

行ROI分割。Imageanalysismainly

involves

ROIsegmentation.information

inthe

image,whichis

called

QR

codedenoising,geometrictransformation,etc.captureimagesrecognition.操作演示Qperation

Demonstration步骤1Step1打开DobotVisionStudio1.4.2,选择通用方案。

Open

DobotVisionStudio1.4.2andselecttheGeneralOption.在工具箱的“采集”模块选择“相机图像”,拖拽

到流程编辑区。Select"Camera

Image"inthe"Acquisition"moduleof

thetoolboxanddragitto

the

process

editing

area.本地图像相机图像

存储图像0相机图像相机图像Camera

image任务实施Task

Implementation步骤2Step

2任务实施Task

Implementation双击“相机图像”模块，进行参数设置。Double-clickthe"CameraImage"moduletosettheparameters.相机图像基本参数设置Camera

image

basic

parameter

settings相机图像触发参数设置Camera

imagetriggerparametersettings相机采集到的图形Graphics

captured

by

the

camera触发字符串字符触发过滤IO

控制IO

选择项IO模式触发设置相机连接选择相机断线重连时间0图像参数图像宽度图像高度像素格式帧率实际帧率25921944MONO831.00012.156触发设置触发延迟LINEOInput0.000任务实施Task

Implementation0相机图像1二维码识别方案流程Program

process在工具栏的识别模块，将“二维码识别”拖拽到

流程编辑区，并与“相机图像”相连。In

the

Identification

Module

on

the

toolbar,drag

"QR

CodeRecognition"totheprocesseditingarea,and

connect

it

with

"Camera

Image".步骤3Step3任务实施TaskImplementation*

双击“1二维码识别”进行参数设置。Double-click"1QRcoderecognition"toset

parameters.执行

确定运行参数Operating

parameters运行参数QR

码DataMatrix码二维码个数极

性边缘类型任意连续型高级参数任务实施Task

Implementation*

点击“执行”按钮，得到二维码识别结果。Click

the“Execute”to

get

the

QR

code

recognition

result.二维码识别结果QRcode

recognition

results二维码的应用ApplicationofQRCode读取数据模式Datareading

mode是指通过手机或二维码识别设备，扫描二维码，解码软件解码后显示数据信息，以较少用户的输入，

直接可以存入。最常见的应用有电子名片、信息溯源

追踪等。ItmeansscanningtheQRcodethroughamobile

phone

or

a

QR

coderecognitiondevice.Thedecodingsoftwarewilldisplaythedatainformationafterdecoding,whichcanbedirectlystoredwith

less

user

input.Themostcommonapplicationsincludeelectronic

business

cardsand

information

traceability.解码验证模式Decodingverificationmode*

是指手机或二维码识别设备扫面二维码，将数据提交与验证服务器，服务器将反馈结果发送回手机，核实产品或服务的有效性。ItmeansthatamobilephoneorQRcode

recognition

device

scans

theQRcodeandsubmitsthedatatotheverificationserver.Theserverwilloftheproductor

service.解码上网模式Decoding

Internet

access

mode是指手机或条码识读设备扫面二维码，显示相关的URL

的链接，用户可以访问这一链接，进行数据浏览或数据下载的活动。Itmeansthatamobilephoneor

barcode

readingdevice

scans

the

QR

codeanddisplaystherelevant

URLlink.Userscan

access

this

link

tobrowseordownloaddata.3解码通信模式Decoding

communication

mode近两年由于媒体的宣传，消费者日趋理性，选择做某项目的人越来越多。Inthepasttwoyears,duetomedia

publicity,consumers

have

become

morerational,andmoreand

more

peoplechooseto

do

a

certainproject.2二维码的应用Applicati