[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-156337-105":59,"doc-detail-156337-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","processing-images-and-video-for-an-impressionist-effect","Processing Images and Video for an Impressionist Effect","","This paper presents a technique for transforming ordinary video segments into hand-painted style animations with an Impressionist effect. The method exploits temporal coherence by using optical flow fields to move brush strokes from frame to frame in the direction of pixel motion, achieving a temporally consistent painterly look. It employs modified off-the-shelf rendering and image processing components, adds randomness to stroke length, color, and orientation, and uses edge-based clipping to preserve object silhouettes and fine detail.",{"@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/processing-images-and-video-for-an-impressionist-effect/156337/",{"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/processing-images-and-video-for-an-impressionist-effect/156337.png","ImageObject",300,407,{"name":92,"@type":93},"Maya Linwood","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-16","2026-08-28",true,{"@type":102,"interactionType":103,"userInteractionCount":19},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is the main goal of the technique described in the paper?","Question",{"text":112,"@type":113},"Automatically produce painterly animations from video clips with an Impressionist look while requiring only minimal user input at the start.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does the method maintain temporal coherence across frames?",{"text":117,"@type":113},"It uses optical flow fields to track pixel motion and push brush strokes from frame to frame in the direction of that movement.",{"name":119,"@type":110,"acceptedAnswer":120},"How does the technique preserve object boundaries and fine details?",{"text":121,"@type":113},"Brush strokes are clipped to edges detected in the original image, keeping silhouettes and detailed structure more intact.","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},156337,1790431121,{"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":19,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":44,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144},962084928432,"https://ap-avatar.wpscdn.com/davatar_155a257f0dc6eb9ab79c44ca47cae57d","Processing Images and Video for An Impressionist Effect  \nPeter Litwinowicz  \nApple Computer, Inc.  \nABSTRACT  \nThis paper describes a technique that transforms ordinary video segments into animations that have a hand-painted look. Our method is the first to exploit temporal coherence in video clips to design an automatic filter with a hand-drawn animation quality, in this case, one that produces an Impressionist effect. Off-the-shelf image processing and rendering techniques are employed, modified and combined in a novel way. This paper proceeds through the process step by step, providing helpful hints for tuning the off-the-shelf parts as well as describing the new techniques and bookkeeping used to glue the parts together.  \n1. INTRODUCTION  \nIn the 1800's, Claude Monet created paintings that attempted to \"catch the fleeting impression of sunlight on objects. And it was this out-of-doors world he wanted to capture in paint -- as it actually was at the moment of seeing it, not worked up in the studio from sketches.\" [Kingston80] .  \nImpressionist paintings provide the inspiration for the work presented here. We have produced images that are impressions of an input image sequence, that give a sense of an original image without reproducing it. These images have a “painterly”feel; that is, they appear as if they have been hand-painted. Furthermore, we have produced entire animations with these same qualities.  \nProducing painterly animations from video clips automatically was the goal of this work. Our technique requires that the user specify a few parameters at the start of the process. After the first frame is produced to the user's liking, our technique processes a whole video segment without further user intervention. Previous painterly techniques require much user interaction and have only been presented in the context of modifying a single frame (with the exception of a technique applied to 3D animated scenes) .  \nWhile this technique is not the first to produce images with an Impressionist look, our method has several advantages. Most  \nPeter Litwinowicz  \n1 Infinite Loop, MS 301-3J Cupertino, CA 95014  \nemail: [litwinow@apple.com](litwinow@apple.com)  \nsignificantly, this paper presents a process that uses optical flow fields to push brush strokes from frame to frame in the direction of pixel movements. This is the first time pixel motion has been tracked to produce a temporally coherent painterly style animation from an input video sequence. Brushstrokes are distributed over an input image and then drawn with antialiased lines or with supplied textures to produce an image in the Impressionist style. Randomness is used to perturb the brush stroke's length, color and orientation to enhance the hand-touched look. Strokes are clipped to edges detected in the original image, thus preserving object silhouettes and fine detail. A new technique is described to orient strokes using gradient-based techniques. In the course of being moved from frame to frame, brush strokes may become too sparse to cover the image. Conversely, brush strokes may become overly dense. The necessary algorithms for adding and deleting brushstrokes as they are pushed too close or too far apart by the optical flow field are described within this paper.  \nThe following section describes previously presented painterly techniques. Then we present the details of our technique:  \n1) the stroke rendering and clipping technique,  \n2) the algorithm for producing brush stroke orientations,  \n3) the algorithm for moving, adding and deleting brushstrokes from frame to frame.  \nIn conclusion, we discuss limitations of the algorithm and possible future directions.  \n2. BACKGROUND  \nTechniques for computer-assisted transformations of pictures are presented in [Haeberli90] . Many of those techniques involve extensive human interaction to produce the final images. More specifically, the user determines the number of strokes as well as their positions. The user controls ","cbCaiqD3CehlDX5x","https://ap.wps.com/l/cbCaiqD3CehlDX5x","pdf",3617662,"English","# Introduction\n# Background","[{\"question\":\"What is the main goal of the technique described in the paper?\",\"answer\":\"Automatically produce painterly animations from video clips with an Impressionist look while requiring only minimal user input at the start.\"},{\"question\":\"How does the method maintain temporal coherence across frames?\",\"answer\":\"It uses optical flow fields to track pixel motion and push brush strokes from frame to frame in the direction of that movement.\"},{\"question\":\"How does the technique preserve object boundaries and fine details?\",\"answer\":\"Brush strokes are clipped to edges detected in the original image, keeping silhouettes and detailed structure more intact.\"}]","Processing Images and Video for an Impressionist Effect | PDF",1787956112,23]