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1–30 of 903
This group is read-only (used for announcements only).
All questions should be asked at
answers.opencv.org
All bugs should be reported to
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OpenCV for And
roid home page:
opencv.org/android
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Alexander Smorkalov
11/3/13
OpenCV Manager 2.4.7 beta test
Hi All! Last time we introduce OpenCV Manager beta testing step before public release. We deside to
unread,
OpenCV Manager 2.4.7 beta test
Hi All! Last time we introduce OpenCV Manager beta testing step before public release. We deside to
11/3/13
Alexander Smorkalov
,
Mohamed Gad-elrab
2
9/13/13
Announcement
OpenCV Manager 2.4.6.2 beta test
I allowed beta testing but I am facing a problem with latest update dated 8th Sept. It stuck in
unread,
Announcement
OpenCV Manager 2.4.6.2 beta test
I allowed beta testing but I am facing a problem with latest update dated 8th Sept. It stuck in
9/13/13
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
Aleksey Odynochenko
3/14/13
Q&A
What i'm doing wrong, using cv::Rodrigues?
I have two rotation matrices R1 R2 R3 1 0 0 0 0 0 0 0 1 0 0 -1 X 0 1 0 = 1 0 0 0 1 0 -1 0 0 0 1 0 R1
unread,
Q&A
What i'm doing wrong, using cv::Rodrigues?
I have two rotation matrices R1 R2 R3 1 0 0 0 0 0 0 0 1 0 0 -1 X 0 1 0 = 1 0 0 0 1 0 -1 0 0 0 1 0 R1
3/14/13
Philip
, …
Linda Li
18
3/7/13
Grabbing speed using OpenCV2.3.1
This is an old post. But I happen to meet a similar problem. I need to process the video frame, and
unread,
Grabbing speed using OpenCV2.3.1
This is an old post. But I happen to meet a similar problem. I need to process the video frame, and
3/7/13
Andrey Pavlenko
1/17/13
Q&A
Re: Problems with equalizeHist function
what OpenCV version do you use? I've checked the latest 2.4.3.2 and the code works OK with
unread,
equalization
histogram
java
Q&A
Re: Problems with equalizeHist function
what OpenCV version do you use? I've checked the latest 2.4.3.2 and the code works OK with
1/17/13
Andrey Pavlenko
1/17/13
Q&A
Re: Android NDK: Unsupported host architecture:
what host OS do you use?
unread,
OpenCV4Android
android
android-opencv
ndk
Q&A
Re: Android NDK: Unsupported host architecture:
what host OS do you use?
1/17/13
Andrey Pavlenko
1/17/13
Q&A
Re: after import opencv library, Error won't go away!
In my system these errors disappear after right click on the 'OpenCV Library' project and
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android
eclipse
java
Q&A
Re: after import opencv library, Error won't go away!
In my system these errors disappear after right click on the 'OpenCV Library' project and
1/17/13
Andrey Pavlenko
1/17/13
Q&A
Re: OpenCV4Android conversion from MatOfKeyPoint to MatOfPoint2f
We have in plans the creation of docs for Java-specific OpenCV classes. For now let me share a short
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OpenCV4Android
Optical-Flow
android
keypoints
tracking
Q&A
Re: OpenCV4Android conversion from MatOfKeyPoint to MatOfPoint2f
We have in plans the creation of docs for Java-specific OpenCV classes. For now let me share a short
1/17/13
Kirill Kornyakov
1/17/13
Announcement
OpenCV4Android group will be blocked starting from Jan 21
Dear community! As you all know, half a year ago OpenCV project got a new Q&A forum: http://www.
unread,
Announcement
OpenCV4Android group will be blocked starting from Jan 21
Dear community! As you all know, half a year ago OpenCV project got a new Q&A forum: http://www.
1/17/13
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
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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
srikanta mondal
1/10/13
apk file has stopped
Dear all, I am Srikanta Mondal, a niewbie in this forum. I am using NDK platform with opencv and
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apk file has stopped
Dear all, I am Srikanta Mondal, a niewbie in this forum. I am using NDK platform with opencv and
1/10/13
He Jibo
,
Andrey Pavlenko
3
1/8/13
use facetime camera with OpenCV4Android 2.4.3
Thanks, Andrey, This solution is easier than the previous version I used. I just need to change any
unread,
use facetime camera with OpenCV4Android 2.4.3
Thanks, Andrey, This solution is easier than the previous version I used. I just need to change any
1/8/13
Andrey Pavlenko
1/8/13
Q&A
Re: Mat.inv() doesnt work
I can't catch what you mean saying 'to invert a bitmap', read here what the inverted
unread,
Q&A
Re: Mat.inv() doesnt work
I can't catch what you mean saying 'to invert a bitmap', read here what the inverted
1/8/13
He Jibo
,
Andrey Pavlenko
2
1/8/13
unable to run Face detection example in OpenCV4Android 2.4.3.2
The log says you forgot to include the sample native library to the APK. Make sure you have the ndk-
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unable to run Face detection example in OpenCV4Android 2.4.3.2
The log says you forgot to include the sample native library to the APK. Make sure you have the ndk-
1/8/13
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
Linda Li
12/31/12
Q&A
Why is it recommended not to use Mat put method, but Mat.setTo() instead.
The OpenCV for Android tutorial recommends to use Mat put method, but Mat.setTo() instead to improve
unread,
Q&A
Why is it recommended not to use Mat put method, but Mat.setTo() instead.
The OpenCV for Android tutorial recommends to use Mat put method, but Mat.setTo() instead to improve
12/31/12
Alexander Smorkalov
12/29/12
Q&A
Re: [OpenCV4Android] Not able to read an image using imread() in Highgui
You try to use OpenCV library before initialization. See this page for details.
unread,
Q&A
Re: [OpenCV4Android] Not able to read an image using imread() in Highgui
You try to use OpenCV library before initialization. See this page for details.
12/29/12
Jim Graham
12/26/12
OpenCV panorama - tracking camera movement
Quick question: when working with OpenCV and the Android camera to create a panorama, how would you
unread,
OpenCV panorama - tracking camera movement
Quick question: when working with OpenCV and the Android camera to create a panorama, how would you
12/26/12
Linda Li
12/26/12
Q&A
The Android app using OpenCV sometimes crashes. Is it because memory is used too much?
I developed one Android app using OpenCV and tesseract-android. We press a button to takes one photo
unread,
Q&A
The Android app using OpenCV sometimes crashes. Is it because memory is used too much?
I developed one Android app using OpenCV and tesseract-android. We press a button to takes one photo
12/26/12
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
Alexander Smorkalov
,
Andrey Pavlenko
2
12/18/12
Q&A
Re: [OpenCV4Android] What is a better way to read an image in a downsampling way, and then get the brightness value based
Mat imread(const string& filename, int flags=1); function can automatically convert the image to
unread,
Q&A
Re: [OpenCV4Android] What is a better way to read an image in a downsampling way, and then get the brightness value based
Mat imread(const string& filename, int flags=1); function can automatically convert the image to
12/18/12
Alexander Smorkalov
,
Andrey Pavlenko
2
12/18/12
Q&A
Re: [OpenCV4Android] What are good ways to debug OpenCV in Android app?
the methods Mat.toString() and Mat.dump() exist in Java API only to produce a string containing info
unread,
Q&A
Re: [OpenCV4Android] What are good ways to debug OpenCV in Android app?
the methods Mat.toString() and Mat.dump() exist in Java API only to produce a string containing info
12/18/12
Andrey Pavlenko
,
Alexander Smorkalov
4
12/18/12
Q&A
Re: using OpenCV4Android 2.4.9, "The import org.opencv.android cannot be resolved"
I am just curious, why the instruction does not mention it, if it is necessary? Looks like the
unread,
Q&A
Re: using OpenCV4Android 2.4.9, "The import org.opencv.android cannot be resolved"
I am just curious, why the instruction does not mention it, if it is necessary? Looks like the
12/18/12
mw18888
, …
Andrey Pavlenko
9
12/17/12
How to read a avi file from Android Opencv?
Sure, eg you can load a cascade classifier with a code like this: new CascadeClassifier(mCascadeFile.
unread,
How to read a avi file from Android Opencv?
Sure, eg you can load a cascade classifier with a code like this: new CascadeClassifier(mCascadeFile.
12/17/12
Andrey Pavlenko
12/17/12
Q&A
Re: error when building sample project
This is fixed in the 2.4.3.1 SDK package. On your side just open the corresponding Application.mk and
unread,
Q&A
Re: error when building sample project
This is fixed in the 2.4.3.1 SDK package. On your side just open the corresponding Application.mk and
12/17/12
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
Jim Graham
3
12/14/12
terrain-following fog filter using OpenCV (?)
On Tue, Dec 11, 2012 at 01:08:17PM -0600, Jim Graham wrote: > bump Never mind...the more I think
unread,
terrain-following fog filter using OpenCV (?)
On Tue, Dec 11, 2012 at 01:08:17PM -0600, Jim Graham wrote: > bump Never mind...the more I think
12/14/12
brigit
,
Andrey Pavlenko
5
12/14/12
frame differencing
thank you! this makes a lot of sense. I will let you know how it turns out. brigit/ On Fri, Dec 14,
unread,
frame differencing
thank you! this makes a lot of sense. I will let you know how it turns out. brigit/ On Fri, Dec 14,
12/14/12
Andrey Pavlenko
12/14/12
Q&A
Re: onCameraFrame gives a mat without a height value?
This is weird, never faced this, what does Mat::size() return in this case?
unread,
Q&A
Re: onCameraFrame gives a mat without a height value?
This is weird, never faced this, what does Mat::size() return in this case?
12/14/12