{"id":{"repo_id":"nus","oai_identifier":"oai:scholarbank.nus.edu.sg:10635/170611"},"canonical_url":"https://search.dev.ndltd.org/etd/nus/oai:scholarbank.nus.edu.sg:10635/170611","repository":{"repo_id":"nus","name":"National University of Singapore","base_url":"https://scholarbank.nus.edu.sg/oai/request"},"display":{"title":"IMPROVING GLOBAL ILLUMINATION WITH A-BUFFER TECHNIQUE","abstract":"Two of the main issues m radiosity generated images are efficient form factor computation and proper mesh generation. Although hemicube algorithm remains a simple and fast method for radiosity form factor computation, its simple sampling scheme for the hemicube pixels causes unacceptable accuracy in its result. We improve the accuracy by applying the A-buffer anti-aliasing technique to handle the hemicube visibility and aliasing, thereby alleviating this inaccuracy that was originally caused by the under/over estimation of the projections on the hemicube pixels. An appropriate meshing scheme, based on the inherent data structure of the A-buffer algorithm, provides better shading and eliminates light leaks around shadow boundaries. The final radiosity solution incorporating these two features is implemented with the progressive refinement approach to improve interactivity.","abstract_html":"Two of the main issues m radiosity generated images are efficient form factor computation and proper mesh generation. Although hemicube algorithm remains a simple and fast method for radiosity form factor computation, its simple sampling scheme for the hemicube pixels causes unacceptable accuracy in its result. We improve the accuracy by applying the A-buffer anti-aliasing technique to handle the hemicube visibility and aliasing, thereby alleviating this inaccuracy that was originally caused by the under/over estimation of the projections on the hemicube pixels. An appropriate meshing scheme, based on the inherent data structure of the A-buffer algorithm, provides better shading and eliminates light leaks around shadow boundaries. The final radiosity solution incorporating these two features is implemented with the progressive refinement approach to improve interactivity.","abstract_has_math":false,"creators":["LIM CHOO HONG"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1994,"date_issued":"1994","date_published":"1994","updated_at":"2026-07-24T03:32:30Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["LIM CHOO HONG"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.issued","label":"Date","values":["1994"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["https://scholarbank.nus.edu.sg/handle/10635/170611"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://scholarbank.nus.edu.sg/bitstreams/3031d49a-bbd4-4571-b1e3-bff953291a33/download"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Two of the main issues m radiosity generated images are efficient form factor computation and proper mesh generation. Although hemicube algorithm remains a simple and fast method for radiosity form factor computation, its simple sampling scheme for the hemicube pixels causes unacceptable accuracy in its result. We improve the accuracy by applying the A-buffer anti-aliasing technique to handle the hemicube visibility and aliasing, thereby alleviating this inaccuracy that was originally caused by the under/over estimation of the projections on the hemicube pixels. An appropriate meshing scheme, based on the inherent data structure of the A-buffer algorithm, provides better shading and eliminates light leaks around shadow boundaries. 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We improve the accuracy by applying the A-buffer anti-aliasing technique to handle the hemicube visibility and aliasing, thereby alleviating this inaccuracy that was originally caused by the under/over estimation of the projections on the hemicube pixels. An appropriate meshing scheme, based on the inherent data structure of the A-buffer algorithm, provides better shading and eliminates light leaks around shadow boundaries. The final radiosity solution incorporating these two features is implemented with the progressive refinement approach to improve interactivity."],"dc:format.checksum.md5":["c1818207c3010c183ea954277b0b80d8","09b3cbac7084a2ee8aaf00f61c0ba652"],"dc:identifier.uri":["https://scholarbank.nus.edu.sg/bitstreams/3031d49a-bbd4-4571-b1e3-bff953291a33/download"],"dc:relation.isreferencedby":["https://scholarbank.nus.edu.sg/handle/10635/170611"],"dc:title":["IMPROVING GLOBAL ILLUMINATION WITH A-BUFFER TECHNIQUE"],"dc:type":["Thesis"]},"updated_at":"2026-07-24T03:32:30Z"}