HalftoningShades of gray can be generated by using a similar method of black dot placement. Thistechnique is known as halftoning and gives rise to what we perceive as a continuous toneimage.The entire printing area is split into sections known as cells (much like a grid). The patternswithin the cell are then altered to obtain the required amount of grayscale. An area of an imagecontaining 50% gray will contain cells that have half of the dots within the cell printed with blackand the other half left empty.The Electromagnetic SpectrumVisible LightVisible light comprises a minute portion of the electromagnetic (EM) spectrum. Although we are"blind" to the rest of the EM spectrum, the part we do see has a significant impact on our338
