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A complementary software method can also generate images that appear hand drawn via PostScript. The paper presents and illustrates both pen-based and software techniques, then analyzes unusual viewer responses and proposes potential applications of machine-generated “sketch” effects. Variables such as pen looseness, pen type, and pen speed are identified to shape drawing character.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/free-hand-plotting-is-it-live-or-is-it-digital-paper/662618/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/free-hand-plotting-is-it-live-or-is-it-digital-paper/662618.png","ImageObject",300,407,{"name":92,"@type":93},"Obex","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-10-28",true,{"@type":102,"interactionType":103,"userInteractionCount":81},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What does free hand plotting aim to achieve?","Question",{"text":112,"@type":113},"It aims to make machine output look like hand-drawn sketches by generating squiggly, imperfect lines.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does the paper generate the effect with hardware?",{"text":117,"@type":113},"It uses a slow Ioline single pen plotter and deliberately introduces wobble by adjusting the pen’s looseness so the pen skips and randomly draws.",{"name":119,"@type":110,"acceptedAnswer":120},"What variables affect the drawing’s character?",{"text":121,"@type":113},"The paper identifies pen looseness, pen type, and pen speed as key variables controlling the resulting sketch-like appearance.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},662618,1793220862,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":81,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":129,"read_time":36},5909898192665,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","CAAD futures Digital Proceedings 1991 567  \n37. Free Hand Plotting Is It Live or Is It Digital?  \nW. Davis van Bakergem, Gen Obata  \nUrban Research and Design Center  \nWashington University  \nSt. Louis, MO 63130 USA  \nFree hand plotting is a technique to create the illusion of hand drawn sketches by means of a CAD system. Utilizing a single pen plotter and altering the holding device, squiggly line drawings can be produced which have a hand made quality and character. In addition , a software technique using postscript can be used to create images that appear to be hand drawn. This paper describes and illustrates both the pen and software technique of creating these squiggly line drawings. It further proposes several explanations for the unusual viewer response and suggests potential applications..  \nFigure 1. The Draughtsman Figure 2. Draughtsman detail Figure 3. The Writer  \nIntroduction  \nThe idea of a machine producing a sketch seems like a contradiction. Making a machine behave like a human and produce human-like creations has been an elusive goal for many inventors. Golems, homunculi, androids, automatons, and robots have fascinated us for  \nCAAD futures Digital Proceedings 1991 568  \ncenturies. Some early efforts in the eighteenth century included a Swiss watchmaker JaquetDroz who built several of the first androids which were exhibited in Paris in 1775. The Writer, the Musician and the Draughtsman were three androids which he created and have appeared at various exhibitions throughout the years (see figures 1-3) . These early efforts were primarily demonstrations of capabilities of current technology and typically were displayed in a carnival sideshow-like setting. In many respects they were similar to the illusions created by magicians to thrill the members of royal courts.  \nMore recently, with the development of digital computing, the search for artificial intelligence (arguably an oxymoron) has become a serious topic for research and has profound implications for our future. These high speed, powerful computers have stimulated a debate regarding the ability of computers to think and several have been labeled ‘thinking machines’. Once again the capacity of a machine to ‘perform’ human functions astonishes and amazes the casual observer. The mathematician and logician Alan Turing devised a test to judge whether or not ‘intelligence’ has been achieved. For example, if a person is communicating through a teletype machine with a computer and through another teletype machine with a human and cannot tell which is which, then some form of artificial intelligence has been realized.  \nIn the realm of computer-aided-design (CAD), the production of drawings was the initial mission of early commercial CAD software and hardware. The mechanical production of working drawings for architecture and engineering applications demanded precision and accuracy, and the ‘toolkits’ of these systems were analogous to the traditional drafting tools which have been in use for hundreds of years. Plotting hardware was developed with speed, precision and reliability as primary performance criteria and the capacity of these machines to outperform a human draftsman is impressive. It is amusing to see a group of people watching a high speed plotter in action for the first time; they will stare for a long time atthe pen racing along the paper —almost as if a ghost were in the machine. Competition in the pen plotter market demanded faster, more precise machines capable of drawing with very fine lines and multiple colors. Engineers of plotters succeeded to the point of vastly surpassing the capabilities of a human draftsman. The drawing quality and character takes on the appearance of having been produced by a “perfect” draftsman. In the architectural profession there is a need for other types of drawings besides precise, dimensioned ones. Architectural drawing types include renderings and sketches which are usually created by a human renderer. More re","cbCaiaRFDFslb2oi","https://ap.wps.com/l/cbCaiaRFDFslb2oi","pdf",1376118,16,"English","# Introduction\n# Technique described\n# Looseness variable","[{\"question\":\"What does free hand plotting aim to achieve?\",\"answer\":\"It aims to make machine output look like hand-drawn sketches by generating squiggly, imperfect lines.\"},{\"question\":\"How does the paper generate the effect with hardware?\",\"answer\":\"It uses a slow Ioline single pen plotter and deliberately introduces wobble by adjusting the pen’s looseness so the pen skips and randomly draws.\"},{\"question\":\"What variables affect the drawing’s character?\",\"answer\":\"The paper identifies pen looseness, pen type, and pen speed as key variables controlling the resulting sketch-like appearance.\"}]","Free Hand Plotting - Is It Live or Is It Digital? - Paper | PDF"]