cocs78's profile - activity

I converted my 16Bits Mat to an 8CU3 with :

depthMap(x,y) =( 8UC3(x,y)[0] = depthMap(x,y)/256 , 8UC3(x,y)[1] = depthMap(x,y)%256, 8UC3(x,y)[2] = 0)

By this way I'm able to compute my depth with : depth(x,y) = 8UC3(x,y)[1] * 256 + 8UC3(x,y)[1]

It seems to work :)

I'm not interested to watch my video, it's only a way to save my depthMap faster than using imwrite()

Ok so it's one way to process but it can't be done directly. I'll try thx

Hi

Is there a way to record 16U Mat with videoWriter to an avi file ?

After recording, I read my video and the result is CV_8UC3 Mat.

For exemple, I get one pixel before record my Mat and i get this same pixel after recording.

Before : CV_16U, value : 2553

After : CV_8UC3, value 11 11 9

Thx

Ok thx, it's ok now. I tried with a different FOURCC like you said it and it's works :). This is really strange because the video could be played normally with a video player :s

Hi

I recorded some videos (BGR type and avi file) with a camera and when I try to open this file and read it I have a big shift :

i record my video with VideoWriter like this :

outputColorVideo.open(videoPath, CV_FOURCC('I', '4', '2', '0'), 30, Size(640, 480), true); ... //Adding some frames ... outputColorVideo.release();

and I read it with VideoCapture like this :

VideoCapture video(videoPath);

if(video.isOpen()){ video.read(frame); imshow("test", frame); } ...

Furthermore, when i watch my video with a movie player like VLC, everything is ok.

Do you know what can explain this problem ?

Thx a lot !

Ok thank you for your reply, I will try it today. Of course, if you could share your code with me, it will be really helpful. How can we proceed ? GitHub ?

Thank a lot i'll take a look on libfreenect2 and i'll tell you if it's good

First of all thank for helping me.

Secondly, I don't want to compute depth map. I just want to get a 3D point for a pixel on the color map. It's just like the MapColorPointToCameraSpacePoint function in coordinatemapper class

I have recorded some frames (Color and Depth as png type) at 30fps and I didn't saved coordinateMapper. My goal is to post processing these frames and compute 3D points from color map. I understand that the only way to do this is to make a stereoCalibration of the Kinect that I used. Then i'll compute 3D point with depth map and apply rotation and translation matrix.

Did I miss something or this way is a correct way ?

Hi

Did you succeed ?

I'm currently doing the same as you with Kinect v2 but unfortunately , I have problems with the stereocalibration. My rms is really bad. I don't know if I have to calibrate Color and Infrared map separately and then give instrinsics parameters to cv::stereoCalibration or do i have to let's cv::stereocalibration calibrate each camera. Moreover, can you tell me how many frames did you used to make your calibration ?

I think you should take a look at this topic : http://nicolas.burrus.name/index.php/... it will allow you to project your points

Hello,

I'm currently developing an application with openCV for IOS on Ipad. My work is based on the sample call 'Chapter13 : saving video' from 'Instant Opencv for iOS' book. I would like to process each frame from a video using the function findContours. Unfortunately, i have an error call 'No matching function for call to 'findContours'. That's seems really strange because Xcode allow me to auto-complete this function and i have no problem to use other functions like 'inRange' or 'cvtColor'. Also, i have the same error to draw a circle with the function 'circle'.

I'm using opencv2.framework.

below, my code and my error :

Thanks for your help