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OpenCV4Android
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Aleksey Odinochenko
7/19/13
Q&A
Conversation focal distance from mm to pixels
For my calculations i need the local length in pixels(opencv format). The andriod API
unread,
android
camera
focallength
opencv
Q&A
Conversation focal distance from mm to pixels
For my calculations i need the local length in pixels(opencv format). The andriod API
7/19/13
Kirill Kornyakov
1/17/13
Q&A
Re: Tegra 3 + OpenCV for Android + with neon only 12% faster
Hello, There might be several reasons of why you don't see the speedup. Let's discuss them
unread,
android
opencv
tegra
Q&A
Re: Tegra 3 + OpenCV for Android + with neon only 12% faster
Hello, There might be several reasons of why you don't see the speedup. Let's discuss them
1/17/13
jiapei100
, …
Andrey Pavlenko
8
12/19/12
Q&A
Which apk(s) to be installed?
Problem has been solved. I should have installed some orther apk(s)... Suggestions: if the users like
unread,
android
apk
opencv
Q&A
Which apk(s) to be installed?
Problem has been solved. I should have installed some orther apk(s)... Suggestions: if the users like
12/19/12
Andrey Pavlenko
12/17/12
Q&A
Re: templateMatching mattoBitmap opencv for android
The problem is that the `matchTemplate()` result is a float point single channel Mat (CV_32FC1) that
unread,
Mat
android
bitmap
opencv
templateMatching
Q&A
Re: templateMatching mattoBitmap opencv for android
The problem is that the `matchTemplate()` result is a float point single channel Mat (CV_32FC1) that
12/17/12
Alexander Smorkalov
11/20/12
Q&A
Re: [OpenCV4Android] OpenCV 2.4.3 tutorial 2 does not work on Android 4.2
Hello pranith kumar, It is problem with native camera on Android 4.2. The problem has been already
unread,
opecv-camera-native
opencv
Q&A
Re: [OpenCV4Android] OpenCV 2.4.3 tutorial 2 does not work on Android 4.2
Hello pranith kumar, It is problem with native camera on Android 4.2. The problem has been already
11/20/12
Khawar khan
,
Alexander Smorkalov
3
11/9/12
Q&A
Rotated image is not centralized in opencv4android
Thanks for your help.. what I'm doing is that I've rotated an image so its edges were cut off
unread,
OpenCV4Android
android
image
opencv
Q&A
Rotated image is not centralized in opencv4android
Thanks for your help.. what I'm doing is that I've rotated an image so its edges were cut off
11/9/12
Alexander Smorkalov
11/12/12
Q&A
Re: [OpenCV4Android] Are there any guides that walkthrough building an app using native C++ from the ground up?
Hi Roger Lam, It is not OpenCV related question. Use official Android documentation and samples. Also
unread,
JNI
android
java
native
opencv
Q&A
Re: [OpenCV4Android] Are there any guides that walkthrough building an app using native C++ from the ground up?
Hi Roger Lam, It is not OpenCV related question. Use official Android documentation and samples. Also
11/12/12
srikanta mondal
,
Andrey Pavlenko
3
1/4/13
Q&A
Re: Is cvCreateFileCapture supported on android?
Yes, That is right. Now I am able to open the video file using ffmpeg library. However I have faced a
unread,
android
opencv
Q&A
Re: Is cvCreateFileCapture supported on android?
Yes, That is right. Now I am able to open the video file using ffmpeg library. However I have faced a
1/4/13
Andrei Zaharescu
2
10/22/12
create a 3rd party android library using opencv and cmake toolchain
I've reduced the problem to a very simple toy example that can be reduced to the following: if I
unread,
library
ndk
opencv
shared
create a 3rd party android library using opencv and cmake toolchain
I've reduced the problem to a very simple toy example that can be reduced to the following: if I
10/22/12
Droidkie
,
Andrey Pavlenko
3
9/27/12
Q&A
Static Initialization Problem
i did what you posted but it still doesn't work. here is the log: Trying to get library list
unread,
OpenCV4Android
android
java
opencv
Q&A
Static Initialization Problem
i did what you posted but it still doesn't work. here is the log: Trying to get library list
9/27/12
Alexander Smorkalov
, …
Andrey Pavlenko
3
9/27/12
Q&A
Re: [OpenCV4Android] OpenCV Tutorial 1 - Add OpenCV on API 8
As Alexander stated above, you should build the sample for API 11 target, but if it has MinSdkVersion
unread,
android
camera
canny
java
opencv
Q&A
Re: [OpenCV4Android] OpenCV Tutorial 1 - Add OpenCV on API 8
As Alexander stated above, you should build the sample for API 11 target, but if it has MinSdkVersion
9/27/12
Putria Febriana
,
Andrey Pavlenko
3
9/19/12
Q&A
erorr cannot find class org.opencv.samples.tutorial2.Sample2NativeCamera$
i do it, but still get error 2012/9/18 Andrey Pavlenko <andrey....@itseez.com> if you need
unread,
android
cvFindCornerSubPix
native-code
opencv
samples
Q&A
erorr cannot find class org.opencv.samples.tutorial2.Sample2NativeCamera$
i do it, but still get error 2012/9/18 Andrey Pavlenko <andrey....@itseez.com> if you need
9/19/12
Duminda Rajitha
, …
Thilina Yapa Bandara
4
9/19/12
Q&A
Re: [OpenCV4Android] Heap memory error + sigsegv
Thanx a lot. I used length devided by 4 and it's working fine. env->SetIntArrayRegion(rgbaData
unread,
NDK
Native-code
OpenCV4Android
ocr
opencv
Q&A
Re: [OpenCV4Android] Heap memory error + sigsegv
Thanx a lot. I used length devided by 4 and it's working fine. env->SetIntArrayRegion(rgbaData
9/19/12
Andrey Kamaev
, …
Andrey Pavlenko
3
9/10/12
Q&A
Re: [OpenCV4Android] openCV support for mobiles lesser than 2.4.2 version
BTW, SIFT is not included into OpenCV4Android SDK v 2.4.2 since it's patented. You need to use
unread,
NDK
android
camera
native-code
opencv
Q&A
Re: [OpenCV4Android] openCV support for mobiles lesser than 2.4.2 version
BTW, SIFT is not included into OpenCV4Android SDK v 2.4.2 since it's patented. You need to use
9/10/12
Rui Marques
,
Kirill Kornyakov
2
8/31/12
Q&A
Re: how to use C++ openCV on android
You can beta-test this new tutorial: http://docs.opencv.org/trunk/doc/tutorials/introduction/
unread,
NDK
c
opencv
Q&A
Re: how to use C++ openCV on android
You can beta-test this new tutorial: http://docs.opencv.org/trunk/doc/tutorials/introduction/
8/31/12
Andrey Kamaev
, …
Alex
6
9/25/12
Q&A
Re: Android samples crashing on HTC One X
The samples built from the trunk are still crashing the same way in dlmalloc. Is there any plan to
unread,
android
opencv
samples
Q&A
Re: Android samples crashing on HTC One X
The samples built from the trunk are still crashing the same way in dlmalloc. Is there any plan to
9/25/12
Rui Marques
,
Andrey Kamaev
2
8/22/12
Q&A
Re: Does OpenCV for Android have the same functions than the "standard" OpenCV?
There are only two real cuts in OpenCV for Android: * no GUI functionality (imshow, namedWindow, etc)
unread,
OpenCV4Android
java
matching
opencv
project
Q&A
Re: Does OpenCV for Android have the same functions than the "standard" OpenCV?
There are only two real cuts in OpenCV for Android: * no GUI functionality (imshow, namedWindow, etc)
8/22/12
Karthik
,
Rui Marques
2
8/17/12
Q&A
opencv samples - face detection StrictMode Error
By turning off the StrictMode (joking) :P Now seriously, sorry for my ignorance, but why do you want
unread,
android
opencv
Q&A
opencv samples - face detection StrictMode Error
By turning off the StrictMode (joking) :P Now seriously, sorry for my ignorance, but why do you want
8/17/12
AlexT
8/16/12
Q&A
Re: Unable to build OpenCV 2.4.2 android native samples
In case anyone is interested, I solved the problem. Here's how: 1. I ran eclipse from Cygwin:
unread,
android
opencv
samples
Q&A
Re: Unable to build OpenCV 2.4.2 android native samples
In case anyone is interested, I solved the problem. Here's how: 1. I ran eclipse from Cygwin:
8/16/12
Shishir
,
Andrey Pavlenko
3
8/8/12
Q&A
App crashes because of a cvAddWeighted(...) statement
Checked, all the images have the same depth, number of channels and all images are BGR images.
unread,
native
native-code
opencv
Q&A
App crashes because of a cvAddWeighted(...) statement
Checked, all the images have the same depth, number of channels and all images are BGR images.
8/8/12
Dmitry
, …
Andrey Pavlenko
4
8/4/12
Q&A
Problems compiling opencv for android from source (Android 4.1.1)
In the end it turned out to be a problem with "ADB install" command. I can no longer use
unread,
android
opencv
source
Q&A
Problems compiling opencv for android from source (Android 4.1.1)
In the end it turned out to be a problem with "ADB install" command. I can no longer use
8/4/12
Philip Lamb
2
7/15/12
New linker error when moving to OpenCV 2.4.2 for Android (NDK, static linking)
OK, another topic on a similar question elsewhere suggested that mbstowcs and wcstombs weren't
unread,
android
link
ndk
opencv
New linker error when moving to OpenCV 2.4.2 for Android (NDK, static linking)
OK, another topic on a similar question elsewhere suggested that mbstowcs and wcstombs weren't
7/15/12
Shishir
, …
He Jibo
12
7/24/12
Q&A
Need help to make my face detection application faster
it looks for the largest connected area of skin color pixels. So whether there is false positives,
unread,
android
opencv
Q&A
Need help to make my face detection application faster
it looks for the largest connected area of skin color pixels. So whether there is false positives,
7/24/12
Andrey Pavlenko
7/12/12
Q&A
Re: which one is better between "opencv android binary package" or "android NDK and JNI"???
OpenCV team delivers OpenCV SDK packages for Android that allow use of OpenCV library in Android
unread,
OpenCV4Android
android
androidcv
binary
opencv
Q&A
Re: which one is better between "opencv android binary package" or "android NDK and JNI"???
OpenCV team delivers OpenCV SDK packages for Android that allow use of OpenCV library in Android
7/12/12
Andrey Pavlenko
, …
Niko Niko
5
7/30/12
Q&A
Re: Errors running builder 'CDT Builder' when trying to build OpenCV for android samples
Finally I decide to uninstall the CDT 8.1 and change it to 8.02 and it works! thanks all!
unread,
android
opencv
Q&A
Re: Errors running builder 'CDT Builder' when trying to build OpenCV for android samples
Finally I decide to uninstall the CDT 8.1 and change it to 8.02 and it works! thanks all!
7/30/12
Kirill Kornyakov
7/9/12
Q&A
Re: Getting extrinsic parameters 3d points corresponds
You should rather use answers.opencv.org for general OpenCV questions. There are a lot of 3D guys...
unread,
FindExtrinsicCameraParams2
opencv
Q&A
Re: Getting extrinsic parameters 3d points corresponds
You should rather use answers.opencv.org for general OpenCV questions. There are a lot of 3D guys...
7/9/12
Andrey Pavlenko
,
Phenom
3
7/25/12
Announcement
OpenCV 2.4.2 is out!
Hey Don't know if this was answered yet but if you want to compile and use an application without
unread,
Manager
opencv
service
Announcement
OpenCV 2.4.2 is out!
Hey Don't know if this was answered yet but if you want to compile and use an application without
7/25/12
Shishir
,
Andrey Pavlenko
2
7/3/12
Q&A
Currently using OpenCV 2.4.0's C apis, will C apis of OpenCV 2.1 and below be faster?
I wouldn't say that the legacy C API in OpenCV is faster than the modern C++ one: both C and C++
unread,
android
native-code
opencv
video
Q&A
Currently using OpenCV 2.4.0's C apis, will C apis of OpenCV 2.1 and below be faster?
I wouldn't say that the legacy C API in OpenCV is faster than the modern C++ one: both C and C++
7/3/12
Andrey Pavlenko
,
Shervin Emami
3
7/2/12
Q&A
Re: error with eclipse&opencv
It means that samples need Android 3.0 platform from Android SDK to be built, but they will run on
unread,
android
opencv
Q&A
Re: error with eclipse&opencv
It means that samples need Android 3.0 platform from Android SDK to be built, but they will run on
7/2/12
Shishir
, …
Alexander Smorkalov
5
6/29/12
Q&A
Can I use highgui to render a video after on the screen after processing it in native code?
Hello! Higui functions for UI manipulations are not supported on Android. You need to use system API.
unread,
ndk
opencv
video
Q&A
Can I use highgui to render a video after on the screen after processing it in native code?
Hello! Higui functions for UI manipulations are not supported on Android. You need to use system API.
6/29/12