Multimedia Instruction (image binarization)

It is mainly used to learn multimedia commands, or I will not be so troublesome to use Win32 SDK programming.

Sure enough, we only need to learn image algorithms, or we recommend Matlab.

The pcmpgtb command is used here.

Format: pcmpgtb mm0, MM1;

Explanation: when the corresponding byte in mm0 is greater than the corresponding byte in MM1, the corresponding position of mm0 is set to 0xff; otherwise, the value is set to 0x00.

Of course, there are also pcmpgtw and so on.

For details, see here.

// This program is a simple framework that can be used to process images. // It is mainly used to learn the MMX/SSE related multimedia commands. # Include <windows. h> # include <gdiplus. h> # pragma comment (Lib, "gdiplus. lib ") using namespace gdiplus; typedef Union {argb color; struct {byte blue; byte green; byte red; byte Alpha ;};} pix; void asmgray2bw (bitmapdata * Data) {uint Height = data-> height; uint width = data-> width; pix * P = (pix *) Data-> scan0; uint n = height * width/2; // It is very strange that I have clearly defined the unsigned byte. I should use 0x80, but here I can only use 0 as the threshold value, which is equivalent to 128 of CPP. // 0x80808080 is used, the unsigned single byte is 128. It is clearly a signed-128, which is really strange. // You can only consider the MMX register as signed by default. Pix cp [] = {0 x percentile, 0x00000000}; _ ASM {push ESI; MoV ECx, N; MoV ESI, [p]; movq mm2, [Cp]; LP: movq MM1, mm2; movq mm0, [esi]; pcmpgtb MM1, mm0; movq [esi], MM1; add ESI, 8; Dec ECx; jnz LP; pop ESI; emms ;}} void cppgray2bw (bitmapdata * Data) {pix * P = (pix *) Data-> scan0; For (uint h = 0; H <data-> height; ++ h) {for (uint W = 0; W <data-> width; ++ W) {If (p-> Red> 128) {P-> Red = 0xff; P-> Blue = 0xff; P-> Green = 0xff;} else {P-> Red = 0; P-> Blue = 0; p-> Green = 0 ;}++ P ;}}void onpaint (HDC) {graphics (HDC); bitmap srcbitmap (L "lena.jpg", 0 ); bitmap * dstbitmap = srcbitmap. clone (0, 0, srcbitmap. getwidth (), srcbitmap. getheight (), srcbitmap. getpixelformat (); bitmapdata data; rect (0, 0, dstbitmap-> getwidth (), dstbitmap-> getheight (); dstbitmap-> lockbits (& rect, cursor | imagelockmodewrite, pixelformat32bppargb, & data); asmgray2bw (& data); // cppgray2bw (& data); dstbitmap-> unlockbits (& data); graphics. drawimage (& srcbitmap, 0, 0); graphics. drawimage (dstbitmap, 0); Delete dstbitmap;} lresult callback wndproc (hwnd, uint, wparam, lparam); int winapi winmain (hinstance, hinstance, pstr, int icmdshow) {hwnd; MSG; wndclass; gdiplusstartupinput; ulong_ptr gdiplustoken; // initialize GDI +. gdiplusstartup (& gdiplustoken, & gdiplusstartupinput, null); wndclass. style = cs_hredraw | cs_vredraw; wndclass. lpfnwndproc = wndproc; wndclass. cbclsextra = 0; wndclass. cbwndextra = 0; wndclass. hinstance = hinstance; wndclass. hicon = loadicon (null, idi_application); wndclass. hcursor = loadcursor (null, idc_arrow); wndclass. hbrbackground = (hbrush) getstockobject (white_brush); wndclass. lpszmenuname = NULL; wndclass. lpszclassname = text ("dip"); registerclass (& wndclass); hwnd = createwindow (text ("dip"), // window class name text ("dip "), // window caption ws_overlappedwindow, // window style cw_usedefault, // initial X position cw_usedefault, // initial y position 600, // initial X size 400, // initial y size null, // parent window handle null, // Window menu handle hinstance, // program instance handle null); // creation parameters/* hwnd button = createwindow ("button ", "processing", ws_child, 200,300,100, 30, hwnd, null, hinstance, 0); */showwindow (hwnd, icmdshow); // showwindow (button, icmdshow ); updatewindow (hwnd); While (getmessage (& MSG, null, 0, 0) {translatemessage (& MSG); dispatchmessage (& MSG);} gdiplusshutdown (gdiplustoken ); return MSG. wparam;} lresult callback wndproc (hwnd, uint message, wparam, lparam) {HDC; paintstruct pS; Switch (Message) {// case wm_command: Case wm_paint: HDC = beginpaint (hwnd, & PS); onpaint (HDC); endpaint (hwnd, & PS); Return 0; Case wm_destroy: postquitmessage (0); Return 0; default: return defwindowproc (hwnd, message, wparam, lparam );}}

Effect: