[Image Algorithm] color image segmentation Topic 2: display the color value of any specified point on the screen

[ImageAlgorithm] Color image segmentation Topic 1: display the color value of any point on the screen

Skyseraph may 13rd 2011 hqu

Email: zgzhaobo@gmail.com QQ: 452728574

Latest modified date: May 13rd 2011 hqu

Note:

1. When analyzing a color image, you need to know the color value of a certain point in the image in real time for the selection of different spaces. For more information, see online materials, display the RGB, HSV, and yiq values of any point on the screen in real time. Of course, they can also be values of other color spaces. The principle is similar to none.

2. For more information about color space, see:

Http://www.cnblogs.com/skyseraph/archive/2011/05/03/2035643.html

Http://www.cnblogs.com/skyseraph/archive/2011/05/05/2038317.html

Http://www.cnblogs.com/skyseraph/archive/2011/05/05/2038308.html

3. Similar Software

Http://www.broadhurst-family.co.uk/lefteye/MainPages/Lab.htm RGB/lab/HSV Software

  

Implementation (source code ):

Response Functions

 
//////////////////////////////////////// /// // Void ccolorsegdlg:: onfetchcolor () // obtain the RGB value of any point on the screen and display {m_bsnapflag ^ = true; If (m_bsnapflag) // enable the screen color {m_colorpicker.setwindowtext ("Stop fetch "); setwindowpos (& wndtopmost, 0, 0, 0, 0, swp_nomove | swp_nosize); settimer (1, 80, null ); // trigger a timer for 80 ms} else {m_colorpicker.setwindowtext ("START fetch"); setwindowpos (& wndnotopmost, 0, 0, 0, 0, swp_nomove | swp_nosize ); killtimer (1);} // Note: Another method is not to use bool to mark m_bsnapflag, // If (m_colorpicker.getcheck (), but this method cannot implement Menu Control}
 

Time Function

Void ccolorsegdlg: ontimer (uint nidevent) {If (nidevent! = 1) return; cpoint pt; getcursorpos (& pt); HDC =: getdc (null); colorref CLR =: getpixel (HDC, PT. x, PT. y); int r = getrvalue (CLR); int G = getgvalue (CLR); int B = getbvalue (CLR); // output the RGB value cstring clrtext; clrtext. format ("% d", R); // getrvalue (CLR) m_editred.setwindowtext (clrtext); clrtext. format ("% d", g); // getgvalue (CLR) m_editgreen.setwindowtext (clrtext); clrtext. format ("% d", B); // getbvalue (CLR) m_editblue.setwindowtext (clrtext); cstring Cs; // HSV double HSV H, HSV S, HSV V; pmycolorspace. myrgb2hsv (R, G, B, HSV H, HSV S, HSV V, 1); // output the HSV value CS. format ("%. 3f ", hsv h); getdlgitem (idc_h)-> setwindowtext (CS); CS. format ("%. 3f ", hsv s); getdlgitem (idc_s)-> setwindowtext (CS); CS. format ("%. 3f ", hsv v); getdlgitem (idc_v)-> setwindowtext (CS); // YUV & yiqdouble yuvy, yuvu, yuvv, yiqy, Yiqi, yiqq; pmycolorspace. myrgb2yuv (R, G, B, yuvy, yuvu, yuvv); pmycolorspace. myrgb2yiq (R, G, B, yiqy, Yiqi, yiqq); // int nth = int (atan (FABS (yuvv/yuvu) * 180.0/3.1415926 ); // output the yiq value CS. format ("%. 3f ", yiqq); getdlgitem (idc_yiqq)-> setwindowtext (CS); CS. format ("%. 3f ", Yiqi); getdlgitem (idc_yiqi)-> setwindowtext (CS); CS. format ("%. 3f ", yiqy); getdlgitem (idc_yiqy)-> setwindowtext (CS); // display area crect m_rect; m_color.getclientrect (m_rect); CDC * Dc = m_color.getdc (); cbrush m_brush (RGB (getrvalue (CLR), getgvalue (CLR), getbvalue (CLR); DC-> fillrect (m_rect, & m_brush);: releasedc (null, HDC); cdialog: ontimer (nidevent );}

 

Effect

 

For the complete interface, see:

Http://www.cnblogs.com/skyseraph/archive/2011/05/05/2038308.html

 

 

Author: skyseraph

Email/Gtalk: zgzhaobo@gmail.com QQ: 452728574

From: http://www.cnblogs.com/skyseraph/

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