SLARToolkit - Silverlight and Windows Phone Augmented Reality Toolkit

Closed Feature: GenericMarkerDetector [5559]

teichgraf — Thu, 16 May 2013 10:39:17 GMT

Implement a GenericMarkerDetector which is using the new IXrgbReader interface in his DetectAllMarkers(IXrgbReader) method:

interface IXrgbReader
{
int Width { get; }
int Height { get; }

int GetPixel(int, int);

// Get XRGB color for a set of x and y coordinates, only the RGB part will actually be used.
int[] GetPixels(int[], int[]);

int[] GetAllPixels();
}

Closed Feature: Windows Phone support + sample [5687]

teichgraf — Thu, 16 May 2013 10:39:17 GMT

Support for Windows Phone 7 as soon as real time camera access is possible. And a nice sample.

Closed Issue: jittering the image when projected onto the marker [6368]

teichgraf — Thu, 16 May 2013 10:39:17 GMT

I've opened a discussion over the jittering of the image (http://slartoolkit.codeplex.com/Thread/View.aspx?ThreadId=217564)
saying that there seems to be a jittering on the projected image on a marker (that's possible to see in the video in here http://vimeo.com/9713000 if anyone is interested)
teichgraf has answered that the solutions has to be fast.

I suggest the usage of the Kalman Filter (http://en.wikipedia.org/wiki/Kalman_filter) since it is contained on the original ARToolkit and it has not been implemented on the jARToolkit (java one, that has the same problem as seen in this SLARToolkit)

I Think this links can help you understand the filter: (It's a bit complex from what I heard, however the complexity lies in understanding the algorithim not on running it):
http://www.roninworks.com/?p=218

Hope it helps

New Post: SLARToolkitWinPhoneSample doesn't recognizes different pats

jaumec — Fri, 08 Feb 2013 12:37:15 GMT

Solverd! Everything is working fine right now.
Thanks.

New Post: SLARToolkitWinPhoneSample doesn't recognizes different pats

jaumec — Thu, 07 Feb 2013 09:36:21 GMT

Yes I know. But I'm interested on the WP sample. I would prefer not porting the SL solution to WP.

New Post: SLARToolkitWinPhoneSample doesn't recognizes different pats

teichgraf — Thu, 07 Feb 2013 08:42:13 GMT

Please see the samples. The puzzle sample for Silverlight supports multiple markers.

New Post: SLARToolkitWinPhoneSample doesn't recognizes different pats

jaumec — Wed, 06 Feb 2013 18:06:35 GMT

Hi,
I’m trying to modify the SLARToolkitWinPhoneSample to recognize multiple pats. The problem is that all detected markers have the same name… it seems that it can only recognize that is a valid square but nothing else… any ideas?

Thanks in advance,
Jaume

New Post: Multiple Marker Detection Windows Phone 7.5

pauldpaul — Tue, 29 Jan 2013 15:07:24 GMT

Thanks for the reply.

I added in the confidence check and now it doesn't display the image at all however it is recognizing the marker as the SLAR marker with a confidence of over 0.5 it seems to always want to use the same image if there is only one marker in view. I think it has something to do with the list and the L marker being stored in both 0 and 1 index.

Where i think the problem is:

private void ApplyTransformations(DetectionResults detectedResults)
        {
           

            //Find L marker in results and transform object 
            var resultL = detectedResults.Where(r => r.Marker == markerL).FirstOrDefault();
            if (resultL == null)
            {
                resultL = detectedResults[0];
            }
            else if (resultL.Confidence > 0.5)
            {
                ApplyTransformation(NeedleImg, resultL.Transformation);
                this.NeedleImg.Visibility = System.Windows.Visibility.Visible;
            }
            // Find SLAR marker in results and apply transformation
            if (detectedResults.Count > 1)
            {
                var resultSlar = detectedResults.Where(r => r.Marker == markerSlar).FirstOrDefault();
                if (resultSlar == null)
                {
                    resultSlar = detectedResults[1];
                }
                else if (resultSlar.Confidence > 0.4)
                {
                    ApplyTransformation(LungsImg, resultSlar.Transformation);
                    this.LungsImg.Visibility = System.Windows.Visibility.Visible;
                }
            }

Thanks for the help

New Post: Multiple Marker Detection Windows Phone 7.5

teichgraf — Tue, 29 Jan 2013 14:37:52 GMT

You need to check the Confidence property of the DetectionResult class, it'll how good the pattern detection is. See the XML comment of the property and also 3rd my reply here: http://slartoolkit.codeplex.com/discussions/243160

- Rene

New Post: Multiple Marker Detection Windows Phone 7.5

pauldpaul — Tue, 29 Jan 2013 13:30:08 GMT

Hi Guys,

I have multiple marker detection working on windows phone 7.5 using the projection sample as a reference. The problem i am having is if there is only one marker in view it will always default to the same image no matter what marker is being detected.

Other then that it works perfectly, can anyone give me any hints?

Thanks

Paul

New Post: slar toolkit for win 8 and wp8

tinabplex — Sat, 15 Dec 2012 19:19:54 GMT

can slar be used in wp8 and win 8 ar projects?

New Post: SLARToolkit and similarity images

lderiu86 — Mon, 19 Nov 2012 11:48:48 GMT

Hi,

is it possible, with this library, calculate the similarity between two images?

Someone can show me a documentation about this feature?

Thanks in advance

Luca

New Comment on "Beginner's Guide"

jpxgen — Wed, 03 Oct 2012 22:56:32 GMT

Getting the error "Object Null reference error" while initializing the markers in the step 9 var marker = Marker.LoadFromResource("Marker_SLAR_16x16segments_80width.pat", 16, 16, 80); Any help could be highly appreciated. Thanks, JP

Source code checked in, #79962

Project Collection Service Accounts — Mon, 01 Oct 2012 21:14:48 GMT

Upgrade: New Version of LabDefaultTemplate.xaml. To upgrade your build definitions, please visit the following link: http://go.microsoft.com/fwlink/?LinkId=254563

Source code checked in, #79961

Project Collection Service Accounts — Mon, 01 Oct 2012 21:08:39 GMT

Checked in by server upgrade

New Post: Videos instead of images/text

zul110 — Mon, 03 Sep 2012 07:08:44 GMT

Alright, thanks :)

Zul

New Post: Videos instead of images/text

zul110 — Mon, 03 Sep 2012 07:08:44 GMT

Alright, thanks :)

Zul

New Post: Videos instead of images/text

teichgraf — Mon, 03 Sep 2012 06:50:27 GMT

If you look at the Silverlight samples / videos you will actually see that there's video overlaid. However, that feature does not work in WP7 due to it's limitation that the camera preview can't be used together with a video.

You can create custom markers, but they need to be b/w and framed by a black square. Here's how to: http://slartoolkit.codeplex.com/documentation

- Rene

New Post: Videos instead of images/text

zul110 — Sun, 02 Sep 2012 09:57:05 GMT

Hi,

Is there a way to use videos instead of images/text in AR apps? I was going through the "Getting started" guide, and also checked the samples, and theres nothing on using videos...

eg. scenario: when the app detects the marker, a video should start playing

Also, is there a way to use custom "images" instead of plain markers for detection? For example, when a user points at, say, a poster (eg: TGIF's poster), then the AR should do its magic...

Thanks :),

Zul

New Post: Cannot Run Windows Phone Sample

sha8wn — Wed, 22 Aug 2012 09:13:03 GMT

Hello all ... i am a bit new to programming but how can i run the windows phone sample. i keep getting the error the namespace greybuffermarkerdetector could not be found.

I really do not know what to do.

Thank You.