private void negativoToolStripMenuItem_Click(object sender, EventArgs e)
 {
     LogicBasicOperations basicOperations = new LogicBasicOperations((Bitmap)this.PBImagen.Image);
     basicOperations.decomposeRGB();
     basicOperations.negative();
     basicOperations.composeRGB();
     PBImagen.Image = basicOperations.getImageMap();
 }