DEFINITION:

• pixel: has luminance, rgb
• lum: float --> calcuated by RGB value of a pixel
• brightness: size_t --> each interval of brightness, to determine which ascii char we use

Classes

• AsciiCanvas: Place to put all the char
• AsciiConverter: Convert pixel to char
• PixelBuffer: Place to put all the pixel
• Pixel: RGB value, lum value
• ImageLoader: load image to Pixel