C # Digital Image processing (ix) Image mirroring

        Private voidMirror_click (Objectsender, EventArgs e) {            if(curbitmap!=NULL) {Mirror Mirform=NewMirror (); if(Mirform.showdialog () = =DialogResult.OK) {Rectangle rect=NewRectangle (0,0, Curbitmap.width, curbitmap.height); BitmapData Bmpdata=curbitmap.lockbits (Rect, Imagelockmode.readwrite, Curbitmap.pixelformat); IntPtr ptr=Bmpdata.scan0; intbytes =0; ////Determine whether the grayscale image or color image, to the corresponding size                    if(curbitmap.pixelformat==pixelformat.format8bppindexed) {bytes= Curbitmap.width *Curbitmap.height; }                    Else if(Curbitmap.pixelformat = =pixelformat.format24bpprgb) {bytes= Curbitmap.width * Curbitmap.height *3; }                    byte[] Pixelvalues =New byte[bytes]; Marshal.Copy (PTR, pixelvalues,0, bytes); //Horizontal Middle Axis                    intHalfwidth = curbitmap.width/2; //Vertical Middle Axis                    intHalfheight = curbitmap.height/2; bytetemp; byteTemp1; byteTemp2; byteTemp3; if(Curbitmap.pixelformat = =pixelformat.format8bppindexed) {if(mirform.getmirror) { for(inti =0; i < curbitmap.height; i++)                                 for(intj =0; J < Halfwidth; J + +) {Temp= Pixelvalues[i * Curbitmap.width +J]; Pixelvalues[i* Curbitmap.width + j] = pixelvalues[(i +1) * Curbitmap.width-j-1]; pixelvalues[(i+1) * Curbitmap.width-j-1] =temp; }                        }                        Else                        {                             for(intj =0; J < Curbitmap.width; J + +)                            {                                 for(inti =0; i < halfheight; i++) {Temp= Pixelvalues[i * Curbitmap.width +J]; Pixelvalues[i* Curbitmap.width + j] = pixelvalues[(Curbitmap.height-i-1) * Curbitmap.width +J]; pixelvalues[(Curbitmap.heightI1) * Curbitmap.width + j] =temp; }                            }                        }                    }                    Else if(Curbitmap.pixelformat = =Pixelformat.format24bpprgb) {if(mirform.getmirror) {//Horizontal Mirroring processing                             for(inti =0; i < curbitmap.height; i++)                            {                                //The order of three bytes per pixel cannot be changed when mirroring horizontally, so this method cannot be used//For (int j = 0; J < Halfwidth; J + +)//{                                //    //The horizontal axis is symmetrical and the pixel value is exchanged on both sides.//temp = pixelvalues[i * Curbitmap.width * 3 + J * 3]; //pixelvalues[i * Curbitmap.width * 3 + J * 3] = pixelvalues[(i + 1) * Curbitmap.width * 3-1-J * 3]; //pixelvalues[(i + 1) * Curbitmap.width * 3-1-J * 3] = temp; //}                                 for(intj =0; J < Halfwidth; J + +)                                {//every three bytes to form a pixel, order can not be chaotictemp = pixelvalues[0+ I * curbitmap.width *3+ J *3]; Temp1= pixelvalues[1+ I * curbitmap.width *3+ J *3]; Temp2= pixelvalues[2+ I * curbitmap.width *3+ J *3]; pixelvalues[0+ I * curbitmap.width *3+ J *3] = pixelvalues[0+ (i +1) * Curbitmap.width *3-(J +1) *3]; pixelvalues[1+ I * curbitmap.width *3+ J *3] = pixelvalues[1+ (i +1) * Curbitmap.width *3-(J +1) *3]; pixelvalues[2+ I * curbitmap.width *3+ J *3] = pixelvalues[2+ (i +1) * Curbitmap.width *3-(J +1) *3]; pixelvalues[0+ (i +1) * Curbitmap.width *3-(J +1) *3] =temp; pixelvalues[1+ (i +1) * Curbitmap.width *3-(J +1) *3] =Temp1; pixelvalues[2+ (i +1) * Curbitmap.width *3-(J +1) *3] =Temp2; }                            }                        }                        Else                        {                            //Vertical Mirroring processing                             for(inti =0; I < Curbitmap.width *3; i++)                            {                                 for(intj =0; J < Halfheight; J + +)                                {                                    //The axis of symmetry is perpendicular to the axes. Interchangeable pixel values on both sidestemp = pixelvalues[j * Curbitmap.width *3+i]; Pixelvalues[j* Curbitmap.width *3+ i] = pixelvalues[(Curbitmap.height-j-1) * Curbitmap.width *3+i]; pixelvalues[(Curbitmap.height-J-1) * Curbitmap.width *3+ i] =temp; }}}} marshal.copy (Pixelvalu ES,0, ptr, bytes);                Curbitmap.unlockbits (Bmpdata);            } Invalidate (); }        }

Original:

Horizontal mirroring:

Vertical mirroring:

C # Digital Image processing (ix) Image mirroring