histogram viewer for RGB color space

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histogram viewer for RGB color space #268143 05/27/09 15:46 05/27/09 15:46
Joined: Jul 2001 Posts: 6,904 H HeelX OP Senior Expert
HeelX OP Senior Expert H Joined: Jul 2001 Posts: 6,904	Hi, this is actually not a project or game related. I needed for my current research project a histogram viewer for the RGB color space in which I can render for each histogram bin a presentation through a particle. click for larger image These are actually ~390.000 particles. On my laptop I have ~10 fps. This is very cool, the performance comes through the particle instancing. If you wanna try it out, download the following archive: click here to download the BGR 3D histogram viewer (hisView) Just start the exe and select the .txt file. In fact, I trained on a large database of skin images to retrieve the probability distribution in RGB space for skin color. So, only these "skin-ish" colors are represented in the histogram. Have fun, Christian

Re: histogram viewer for RGB color space [Re: HeelX] #268148 05/27/09 16:52 05/27/09 16:52
Joined: Apr 2005 Posts: 4,506 Germany F fogman Expert
fogman Expert F Joined: Apr 2005 Posts: 4,506 Germany	"390.000" Good to know. Apart from that: It�s really impressive what you get out of the engine. Kudos! no science involved

Re: histogram viewer for RGB color space [Re: fogman] #268150 05/27/09 17:04 05/27/09 17:04
Joined: Aug 2008 Posts: 2,838 take me down to the paradise c... Cowabanga Expert
Cowabanga Expert Joined: Aug 2008 Posts: 2,838 take me down to the paradise c...	Nice one! Good joob HeelX

Re: histogram viewer for RGB color space [Re: Cowabanga] #268166 05/27/09 19:07 05/27/09 19:07
Joined: Nov 2007 Posts: 1,032 Croatia croman Serious User
croman Serious User Joined: Nov 2007 Posts: 1,032 Croatia	cool stuff you got there 390k particles with 10fps on laptop....hm...nice Ubi bene, ibi Patria.

Re: histogram viewer for RGB color space [Re: croman] #268245 05/28/09 10:23 05/28/09 10:23
Joined: Jun 2006 Posts: 2,640 Earth Germanunkol Expert
Germanunkol Expert Joined: Jun 2006 Posts: 2,640 Earth	hm... why does it switch colors when rotating? Is it supposed to do that? Other than that, wow ~"I never let school interfere with my education"~ -Mark Twain

Re: histogram viewer for RGB color space [Re: Germanunkol] #268330 05/28/09 17:12 05/28/09 17:12
Joined: Jul 2001 Posts: 6,904 H HeelX OP Senior Expert
HeelX OP Senior Expert H Joined: Jul 2001 Posts: 6,904	Originally Posted By: Germanunkol hm... why does it switch colors when rotating? Is it supposed to do that? That has to do with alpha-sorting. When you rotate the RGB cube so that the white corner faces the camera, the darker particles are "fighting" against the brighter particles. Has anyone an idea to fix that? Maybe I use a 1-bit alpha DDS image... Best regards (and thanks for the comments), -- Christian

Re: histogram viewer for RGB color space [Re: HeelX] #268364 05/28/09 20:41 05/28/09 20:41
Joined: Dec 2000 Posts: 4,608 mk_1 Expert
mk_1 Expert Joined: Dec 2000 Posts: 4,608	Face detection/tracking based on image histrogram? Looks nice Follow me on twitter

Re: histogram viewer for RGB color space [Re: mk_1] #268376 05/28/09 21:29 05/28/09 21:29
Joined: Jul 2001 Posts: 6,904 H HeelX OP Senior Expert
HeelX OP Senior Expert H Joined: Jul 2001 Posts: 6,904	Sort of. I deal with realtime facial motion capturing. The first step of my work is easy: finding a region of interest, which is actually in my case the face, obviously. I'm currently testing RGB, HSV and LAB color spaces about which is suited best to assign each pixel a probability if it is a skin pixel (research showed HSV is the best). Then I group 'em and together with a motion and a geometry cue I hopefully get the face bounding box. Last edited by HeelX; 05/28/09 21:30.

Re: histogram viewer for RGB color space [Re: HeelX] #268489 05/29/09 16:03 05/29/09 16:03
Joined: Mar 2004 Posts: 92 Dresden Revo Junior Member
Revo Junior Member Joined: Mar 2004 Posts: 92 Dresden	OO - this is realy cool (and its very interesting how much the instancing influences the fps . sry for the offtopic question, but i am searching the last hour after it: can you tell me which way you included this file-select-popup (i remember that i read sth about that .. but can't remember ^^) -----3d Gamestudio Commercial--------- Vers. 7.8 Focus on Gaming

Re: histogram viewer for RGB color space [Re: Revo] #268574
05/30/09 01:52 05/30/09 01:52

Joined: Jul 2001
Posts: 6,904

HeelX

OP
Senior Expert

HeelX

OP
Senior Expert

Joined: Jul 2001
Posts: 6,904

Here you go:

Code:

void openFileDialog (char* filename, char* title, char* filter)
{
     OPENFILENAME o;
     zero(o);

     strcpy(filename, "");

     // Stelle den Dialog ein
     o.lStructSize   = sizeof(OPENFILENAME);
     o.Flags         = OFN_PATHMUSTEXIST | OFN_HIDEREADONLY | OFN_NOCHANGEDIR;
     o.lpstrFilter   = filter;
     o.lpstrTitle    = title;
     o.lpstrFile     = filename;
     o.nMaxFile      = 255;

     GetOpenFileName(&o);
}

// Usage:

void example ()
{
     char file[512];
     
     openFileDialog(file, "open file", "text files (*.txt)\0*.txt\0\0");
     wait_for(openFileDialog);
     
     printf("the file %s has been selected", file);
}

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