Open Source Interface

TouchKit from NORTD

2008-09-04T20:55:41-05:00

If y’all didn’t know that the new touchkit SDK is out you are in for a surprise. It’s an addon for openFrameworks and is quite simple to develop for. There are a few examples and an active community. There are also a few examples on the forum which I have written. There are a few more in production and maybe even a physics engine for fast development. (Verlet baby!)

touchKit

Problems with barrel distortion correction filter

2008-08-28T14:58:53-05:00

Hey Guys,

having problems with the plugin. I can start it and a video source appears (curiously it appears only if i select the USB option - but i am using a fire-i camera???). If i press “g” the calculation seems to start, but it never ends. I should see 10 steps, but it does not finishes even the first. I am using this settings in the .bat file:

touchlib_barreldistortion_tool.exe -w 6 -h 8 -s 2 -n 10 -b 20

I have attached an image how that looks…

Can one of you please give a helping hand?

Tank you in advance!

Touchlib compiled libraries, revision 348 (19 dec 2007)

2007-12-25T08:33:07-05:00

The latest SVN version of touchlib (rev 348) is now available from:
http://www.multigesture.net/downloads/

What’s new:
- This version includes the new barrel distortion correction filter.

Examples:
- see attached pictures.

To calculate the barrel distortion correction parameters, please use this tool:
- http://www.multigesture.net/wp-content/uploads/2007/12/touchlib_barreldistortion_tool.zip

Required:
- the image from pattern.pdf (from the zipfile) printed on a piece of paper (perhaps glued on some cardboard)

Usage:
1. Connect a usb camera or firewire cam (using CMU)
2. Start the touchlib_barreldistortion_tool.bat
3. Select your camera type and press enter
4. start the calibration by pressing g
5. Put the pattern on the table
- After each snapshot (the screen will blink) you should move the pattern to another corner or side.
- You should also vary in rotation.
- Don’t forget to put the patter in the middle aswell
6. After 10 snapshots the tool will calculate the correction values and save them to camera.yml
7. By pressing u it is possible to preview the correction.

If the tool has cropped the result too much, add this argument: -b
Example: -w 6 -h 8 -s 2 -n 10 -b 20
20 seems to be good for a F 2.5 mm lens

In touchlib:
8. the camera.yml should be in the same directory as config.xml
9. add this line to your config.xml

<barreldistortioncorrection label="barreldistortioncorrection1">
    <border_size value="20" />
</barreldistortioncorrection>

The border size is a value you need to experiment it. It will add a black border of xx pixels.
Try using it with the value 0 first. If it resulting image is cropped too much, try increasing this value.

Touch Tracer v0.2 release

2007-05-12T17:28:20-05:00

Project description:
Name: Touch Tracer
Version: 0.2
Purpose: To display recognized blob’s and for debugging purpose

Changelist:
- Added tracelines
- Added funky blob colours
- Made the source linux compatible
- General code cleanup

Touch Tracer v0.2 video

> Touch Tracer v0.2 example video

Install instructions:
(windows)
1. Put all files (touch_tracer.exe and *.bat files) in the same dir as touchlib.dll
2. Either run the bat files or edit them.
touch_tracer.exe requires 4 arguments: width height bitdepth refreshrate
example: touch_tracer.exe 1024 768 32 60

(linux)
1. I guess linux users are smart enough to compile it with the included
Makefile. (Change touchlib home dir)
2. Don’t forget to run the applications with the 4 arguments for
display.

General note, as the readme.txt states, this application needs libraries of visual studio 2005.
If you don’t have those, you will be prompt with an error message.

When running the following shortcuts are available:
ESC = exit
g = enable/disable grid
s = enable/disable antialias for lines (nicer)

Todo:
1. Nothing? Suggestions? PM me.

Download:
I’ve included a windows binary and the source code of touch tracer for linux users.
By using the included Makefile you should be able to get it up running in notime.

Touch Tracer v0.2
Touch Tracer v0.2 source code

Optional downloads
msvcr80.dll and msvcp80.rar - Required if no vs2k5 runtime dlls are installed
Visual Studio 2005 sp1 redist. package - Entire package if the one above fails

(Touchlib) Adding Calibration Points to config application

2008-09-03T10:59:36-05:00

Hi!
I’ve been trying to add calibration points to the Touchlib configapp.
After modifying ITouchScreen.h and successfully compiling, they still show up the same number of points as default (20 points) but distributed on the new grid I defined at ITouchScreen.h. (See attached pictures)
A part of that, at the config.xml the application writes the correct amount of points.

How can I get the correct number of points to calibrate?

ITouchScreen.h (modified)

#ifndef __TOUCHLIB_ITOUCHSCREEN__
#define __TOUCHLIB_ITOUCHSCREEN__

#include "ITouchListener.h"
#include "ITouchEvent.h"
#include "IBlobTracker.h"

#include "Image.h"
#include "vector2d.h"
#include "mesh2d.h"
#include <list>

namespace touchlib
{
    #define GRID_X     8 //[b]CHANGE [/b]
    #define GRID_Y     6 //[b]CHANGE [/b]
    #define GRID_POINTS ((GRID_X+1) * (GRID_Y+1))
    #define GRID_INDICES (GRID_X * GRID_Y * 3 * 2)

    class TOUCHLIB_EXPORT ITouchScreen
    {
    public:
        //! A client registers itself as a listener for touch events
        virtual void registerListener(ITouchListener *listener) = 0;

        //! capture the frame and do the detection
        virtual bool process() = 0;

        //! Gets the raw camera output
        virtual void getRawImage(char **img, int &width, int &height) = 0;

        //! add a new filter on the end of the chain
        virtual std::string pushFilter(const char *type, const char * label = 0) = 0;

        //! find instances of filters in the chain
        virtual std::list<std::string> findFilters(const char *type) = 0;

        //! find first instance of a filter in the chain
        virtual std::string findFirstFilter(const char * type) = 0;

        //! load the filter graph from file
        virtual bool loadConfig(const char* filename) = 0;

        //! save the filter graph to file
        virtual void saveConfig(const char* filename) = 0;

        //! set a filter parameter
        virtual void setParameter(std::string & label, char *param, char *value) = 0;

        // get an image from the filter chain
        virtual IplImage* getFilterImage(std::string & label) = 0;
        virtual IplImage* getFilterImage(int step) = 0;


        //! start the processing and video capturing
        virtual void beginProcessing() = 0;

        //! toggles displaying of debug info.
        virtual void setDebugMode(bool m) = 0;

        //! get events
        virtual void getEvents() = 0;

        //! starts calibration
        virtual void beginCalibration() = 0;

        //! goes to the next step
        virtual void nextCalibrationStep() = 0;

        //! return to the last step
        virtual void revertCalibrationStep() = 0;

        //!
        virtual float getScreenScale() = 0;
        virtual rect2df getScreenBBox() = 0;

        //! access calibration data.. this may get refactored.
        virtual void setScreenScale(float s) = 0;
        virtual void setScreenBBox(rect2df & bbox) = 0;

        virtual vector2df *getScreenPoints() = 0;
        virtual vector2df *getCameraPoints() = 0;

        // start the processing and video capturing
        virtual void beginTracking() = 0;

        /**
         * Sets the blob tracker.
         */
        virtual void setBlobTracker(IBlobTracker* blobTracker) = 0;
    };

}

#endif  // __TOUCHLIB_ITOUCHSCREEN__

Thank you!!

MT Mouse Driver—MultiMouse

2008-07-16T15:18:46-05:00

Hi everyone,

I’ve been promising to release this software for a very long time, but I’ve been slacking off, so here it is:

http://www.risenparadigm.com/multimouse

***************************************************************************
FEATURE LIST AND USAGE:
***************************************************************************
One Finger:

-Left-click: tap finger.
-Move cursor: hold and move the finger.

Two Fingers:

-Left-click: place first finger as cursor and tap second finger to the left of it.
-Right-click: place first finger as cursor and tap second finger to the right of it.
-Drag-and-drop: place first finger as cursor, press and hold second finger to the left of it, move around, and release second finger to drop.

Three Fingers:

-Scrolling: move up to scroll up and down to scroll down.
-Alt-tabbing: move left to ‘alt-tab’ left, and right to ‘alt-tab’ right.

***************************************************************************

I would really appreciate some suggestions/feedback. I have only tried it on a few setups so it’s bound to have some hiccups.

I’ll post the source code soon for those who are interested. I’m leaving for Japan in two days and things are a bit hectic right now, but I will get to it as soon as possible.

Thanks,
risenparadigm

Coldnt find IAMStream Interface

2008-09-01T03:16:13-05:00

Greetings, lets get started on my issue.

I am unable to get this working because whenever I run config.bat i recieve an error. The error is titled “Coldnt find IAMStream Interface” and contains the message “No such interface supported”.

I am running Windows Vista 64bit, as well as Visual Studio Redistributable 2005 (x64).

My camera is a Logitech QuickCam Communicate STX, and installed alongside it is its QuickCam 10.5.1 software.

This exact same setup works on a seperate computer, save that computer is running regular vista. So i am assuming that the issue lies between touchlib and 64bit vista/Visual Studio

Anyone got an idea?

HELP NEED TO SETUP THE CONFIGBAT.EXE

2008-05-18T20:27:41-05:00

Hi,

This is my first post and my veryfirst attempt in multitouch pad stuff. I have done as to what the youtube video had shown, i took a carboard box, taped my webcamera in the center, i didnt have a glass slab, so i took a transparent file cover i guess its acrylic, anyways, and stuck paper to it and stuck thing over the carboard box, paper facing up. (Picture 001)

Now the thing is that when i run the software, i can chose upto 640x480 resolution only… and when i tried adjusting for like 4 -5 hours , i only get as in picture 2 (MULTITOUCH PAD WRONG CONFIG).

I can never get the tips of my fingure to be like bulbs and the background black. I have tried to swtich on every single light in the room with a tourch light as well and study lamp… no help, it is that when i put my hand on top of the paper, either i get my shadows on it, or changing the contrast and brigthness and the rectify slide, cause the thing to go black, and then when i put my hand over it it causes like a patch of light to be seen on the camera…

I can not get the bulb effect which is required. I have still tried to go to the arrow thing to setup the red arrows spots, it just keeps thinking that there is some touch when i have not even touched it and finishes the setup automatically.

Then i have tried using the smoke thing, just useless, the thing is all over the place.

The only thing worked was if i try to put a lase pointer in a dark room it iwll detect it and work 70% fine, that too not 100%.

Could anyone help me out here? I am so lost.

Thanks in advance.

Touchlib HelloWorld

2008-02-17T09:22:49-05:00

I am new to Touchlib. I’ve read a little about it, bu I can’t make it work. I’ve seen the demos and they work just fine but I want to create a “Hello World” app.
What is the simplest way to do that?

Ogre3d & Visual C++ 2008 (v9) Compiling

2008-07-31T21:56:13-05:00

Hi everyone i going post my experiments with ogre3d and opencv of curse all those things in touchlib integration.

The problems :
-Many libs and headers files
-Hard configuration
-No integration

Target
Wizard for VS 9
Simple lib and headers path for easy integration.
Both configuration ogre and opencv

Well go ahead....

first problem : typedef unsigned char uchar twice declaration in ogreprerequisites.h and cxtypes.h mmm…
link headers and libs problems i suppose.

I coming soon with my advances, any suggestion welcome.