opencv for android官方教程Word下载.docx

opencv for android官方教程Word下载.docx

《opencv for android官方教程Word下载.docx》由会员分享，可在线阅读，更多相关《opencv for android官方教程Word下载.docx（15页珍藏版）》请在冰豆网上搜索。

ThistutorialalsoassumesyouhaveOpenCV4AndroidSDKalreadyinstalledonyourdevelopmentmachineandOpenCVManageronyourtestingdevicecorrespondingly.Ifyouneedhelpwithanyofthese,youmayconsultourOpenCV4AndroidSDKtutorial.

Ifyouencounteranyerrorafterthoroughlyfollowingthesesteps,feelfreetocontactusviaOpenCV4AndroiddiscussiongrouporOpenCVQ&

Aforum.We’lldoourbesttohelpyouout.

UsingOpenCVLibraryWithinYourAndroidProject

InthissectionwewillexplainhowtomakesomeexistingprojecttouseOpenCV.Startingwith2.4.2releaseforAndroid,OpenCVManagerisusedtoprovideappswiththebestavailableversionofOpenCV.Youcangetmoreinformationhere:

AndroidOpenCVManagerandintheseslides.

Java

ApplicationDevelopmentwithAsyncInitialization

Usingasyncinitializationisarecommendedwayforapplicationdevelopment.ItusestheOpenCVManagertoaccessOpenCVlibrariesexternallyinstalledinthetargetsystem.

1.AddOpenCVlibraryprojecttoyourworkspace.UsemenuFile->

Import->

Existingprojectinyourworkspace.

PressBrowsebuttonandlocateOpenCV4AndroidSDK（OpenCV-2.4.9-android-sdk/sdk）.

2.InapplicationprojectaddareferencetotheOpenCVJavaSDKinProject->

Properties->

Android->

Library->

AddselectOpenCVLibrary-2.4.9.

InmostcasesOpenCVManagermaybeinstalledautomaticallyfromGooglePlay.Forthecase,whenGooglePlayisnotavailable,i.e.emulator,developerboard,etc,youcaninstallitmanuallyusingadbtool.SeeHowtoselecttheproperversionofOpenCVManagerfordetails.

Thereisaverybasecodesnippetimplementingtheasyncinitialization.Itshowsbasicprinciples.Seethe“15-puzzle”OpenCVsamplefordetails.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

publicclassSample1JavaextendsActivityimplementsCvCameraViewListener{

privateBaseLoaderCallbackmLoaderCallback=newBaseLoaderCallback（this）{

@Override

publicvoidonManagerConnected（intstatus）{

switch（status）{

caseLoaderCallbackInterface.SUCCESS:

{

Log.i（TAG,"

OpenCVloadedsuccessfully"

）;

mOpenCvCameraView.enableView（）;

}break;

default:

super.onManagerConnected（status）;

}

};

publicvoidonResume（）

super.onResume（）;

OpenCVLoader.initAsync（OpenCVLoader.OPENCV_VERSION_2_4_6,this,mLoaderCallback）;

...

}

ItthiscaseapplicationworkswithOpenCVManagerinasynchronousfashion.OnManagerConnectedcallbackwillbecalledinUIthread,wheninitializationfinishes.Pleasenote,thatitisnotallowedtouseOpenCVcallsorloadOpenCV-dependentnativelibsbeforeinvokingthiscallback.LoadyourownnativelibrariesthatdependonOpenCVafterthesuccessfulOpenCVinitialization.DefaultBaseLoaderCallbackimplementationtreatapplicationcontextasActivityandcallsActivity.finish（）methodtoexitincaseofinitializationfailure.Tooverridethisbehavioryouneedtooverridefinish（）methodofBaseLoaderCallbackclassandimplementyourownfinalizationmethod.

ApplicationDevelopmentwithStaticInitialization

AccordingtothisapproachallOpenCVbinariesareincludedintoyourapplicationpackage.Itisdesignedmostlyfordevelopmentpurposes.Thisapproachisdeprecatedfortheproductioncode,releasepackageisrecommendedtocommunicatewithOpenCVManagerviatheasyncinitializationdescribedabove.

1.AddtheOpenCVlibraryprojecttoyourworkspacethesamewayasfortheasyncinitializationabove.UsemenuFile->

Existingprojectinyourworkspace,pressBrowsebuttonandselectOpenCVSDKpath（OpenCV-2.4.9-android-sdk/sdk）.

2.IntheapplicationprojectaddareferencetotheOpenCV4AndroidSDKinProject->

AddselectOpenCVLibrary-2.4.9;

3.Ifyourapplicationprojectdoesn’thaveaJNIpart,justcopythecorrespondingOpenCVnativelibsfrom<

OpenCV-2.4.9-android-sdk>

/sdk/native/libs/<

target_arch>

toyourprojectdirectorytofolderlibs/<

.

IncaseoftheapplicationprojectwithaJNIpart,insteadofmanuallibrariescopyingyouneedtomodifyyourAndroid.mkfile:

addthefollowingtwocodelinesafterthe"

include$（CLEAR_VARS）"

andbefore"

includepath_to_OpenCV-2.4.9-android-sdk/sdk/native/jni/OpenCV.mk"

1

2

OPENCV_CAMERA_MODULES:

=on

OP