ABSTRACT
One of the key factors attributed to Photoshop’s success has been theprogram’s support for plug-in filters. A huge industry of third-party com-panies has grown in response to the needs of users wanting extra features within Photoshop. John Knoll, who together with his brother Thomas Knoll originally wrote the Photoshop program, was responsible for creating many of the plug-ins that shipped with the earlier versions of Photoshop (plug-ins that still survive today). The open door development policy has enabled many independent software companies to add creative tools and functionality to the Photoshop program. In turn this ongoing development has boosted the status of Photoshop as a professional image manipulation program. Even high-end retouching systems cannot match this versatility and will rely on accessing Photoshop for its plug-in rich features.
