Gamma curve adjustment picture

        Private voidForm1_Load (Objectsender, EventArgs e) {img= pictureBox1.Image = Image.FromFile ("8.jpg");        } Image img; Private voidButton1_Click (Objectsender, EventArgs e) {            using(Graphics g =Picturebox2.creategraphics ())                {g.clear (Picturebox2.backcolor); using(Image tmp = SetGamma (IMG). Clone () asImage, Hsbred.value, Hsbgreen.value, Hsbblue.value)) Picturebox2.image=NewBitmap (TMP); }        }        /// <summary>        ///Gamma curve Adjustment/// </summary>        /// <param name= "img" ></param>        /// <param name= "Red" ></param>        /// <param name= "Green" ></param>        /// <param name= "Blue" ></param>         PublicImage SetGamma (Image img,DoubleRedDoubleGreenDoubleBlue) {            using(Bitmap tmp = img asBitmap)                {Color C; byte[] RG =Creategammaarray (red); byte[] GG =Creategammaarray (green); byte[] BG =Creategammaarray (blue);  for(inti =0; I < TMP. Width; i++)                {                     for(intj =0; J < TMP. Height; J + +) {C=tmp.                        GetPixel (i, j); Tmp.                    SetPixel (i, J, Color.FromArgb (RG[C.R], GG[C.G], bg[c.b])); }} RG= GG = BG =NULL; returnTmp. Clone () asBitmap; }        }        /// <summary>        ///get an array of curves/// </summary>        /// <param name= "Color" >Color</param>        /// <returns>Array</returns>        Private byte[] Creategammaarray (Doublecolor) {            byte[] Gammaarray =New byte[ the];  for(inti =1; I < the; i++) Gammaarray[i]= (byte) Math.min (255, (int)((255.0* MATH.POW (I/255.0,1.0/color)) +0.5)); returnGammaarray; }        Private voidHscrollbar1_scroll (Objectsender, ScrollEventArgs e) {Label5. Text=string. Format ("red={0},green={1},blue={2}", Hsbred.value, Hsbgreen.value, Hsbblue.value); Button1.        PerformClick (); }        Private voidHsbgreen_scroll (Objectsender, ScrollEventArgs e) {Label5. Text=string. Format ("red={0},green={1},blue={2}", Hsbred.value, Hsbgreen.value, Hsbblue.value); Button1.        PerformClick (); }        Private voidHsbblue_scroll (Objectsender, ScrollEventArgs e) {Label5. Text=string. Format ("red={0},green={1},blue={2}", Hsbred.value, Hsbgreen.value, Hsbblue.value); Button1.        PerformClick (); }

Gamma curve adjustment picture