{"id":610503,"date":"2019-09-24T13:06:40","date_gmt":"2019-09-24T20:06:40","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/?post_type=msr-project&#038;p=610503"},"modified":"2019-10-03T12:25:52","modified_gmt":"2019-10-03T19:25:52","slug":"privacy-preserving-image-queries-for-camera-localization","status":"publish","type":"msr-project","link":"https:\/\/www.microsoft.com\/en-us\/research\/project\/privacy-preserving-image-queries-for-camera-localization\/","title":{"rendered":"Privacy Preserving Image Queries for Camera Localization"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-610527\" src=\"https:\/\/www.microsoft.com\/en-us\/research\/uploads\/prod\/2019\/09\/teaser2-5d8a74b38f114.png\" alt=\"\" width=\"552\" height=\"298\" srcset=\"https:\/\/www.microsoft.com\/en-us\/research\/uploads\/prod\/2019\/09\/teaser2-5d8a74b38f114.png 1066w, https:\/\/www.microsoft.com\/en-us\/research\/uploads\/prod\/2019\/09\/teaser2-5d8a74b38f114-300x162.png 300w, https:\/\/www.microsoft.com\/en-us\/research\/uploads\/prod\/2019\/09\/teaser2-5d8a74b38f114-768x414.png 768w, https:\/\/www.microsoft.com\/en-us\/research\/uploads\/prod\/2019\/09\/teaser2-5d8a74b38f114-1024x552.png 1024w\" sizes=\"(max-width: 552px) 100vw, 552px\" \/><\/p>\n<p style=\"text-align: left\">Augmented\/mixed reality and robotic applications are increasingly relying on cloud-based localization services, which require users to upload query images to perform camera pose estimation on a server. This raises significant privacy concerns when consumers use such services in their homes or in confidential industrial settings. Even if only image features are uploaded, the privacy concerns remain as the images can be reconstructed fairly well from feature locations and descriptors. We propose to conceal the content of the query images from an adversary on the server or a man-in-the-middle intruder. The key insight is to replace the 2D image feature points in the query image with randomly oriented 2D lines passing through their original 2D positions. It will be shown that this feature representation hides the image contents, and thereby protects user privacy, yet still provides sufficient geometric constraints to enable robust and accurate 6-DOF camera pose estimation from feature correspondences. Our proposed method can handle single- and multi-image queries as well as exploit additional information about known structure, gravity, and scale. Numerous experiments demonstrate the high practical relevance of our approach.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this project, we have developed a new 6-DoF camera localization technique that conceals the content of the query image when localization is performed in a cloud-based service. In this way, we enhance the user&#039;s privacy. This is a follow up of our previous work on privacy preserving camera localization where we developed a technique to conceal the 3D point cloud map which is needed for localization. <\/p>\n","protected":false},"featured_media":610551,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","footnotes":""},"research-area":[13556,13562],"msr-locale":[268875],"msr-impact-theme":[],"msr-pillar":[],"class_list":["post-610503","msr-project","type-msr-project","status-publish","has-post-thumbnail","hentry","msr-research-area-artificial-intelligence","msr-research-area-computer-vision","msr-locale-en_us","msr-archive-status-active"],"msr_project_start":"2018-09-02","related-publications":[585760,586105,606297],"related-downloads":[],"related-videos":[],"related-groups":[],"related-events":[],"related-opportunities":[],"related-posts":[],"related-articles":[],"tab-content":[],"slides":[],"related-researchers":[{"type":"user_nicename","display_name":"Pablo Speciale","user_id":38640,"people_section":"Section name 0","alias":"paspecia"},{"type":"user_nicename","display_name":"Sudipta Sinha","user_id":33748,"people_section":"Section name 0","alias":"sudipsin"},{"type":"user_nicename","display_name":"Marc Pollefeys","user_id":36191,"people_section":"Section name 0","alias":"mapoll"}],"msr_research_lab":[602418],"msr_impact_theme":[],"_links":{"self":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-project\/610503"}],"collection":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-project"}],"about":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/types\/msr-project"}],"version-history":[{"count":7,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-project\/610503\/revisions"}],"predecessor-version":[{"id":612564,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-project\/610503\/revisions\/612564"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/media\/610551"}],"wp:attachment":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/media?parent=610503"}],"wp:term":[{"taxonomy":"msr-research-area","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/research-area?post=610503"},{"taxonomy":"msr-locale","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-locale?post=610503"},{"taxonomy":"msr-impact-theme","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-impact-theme?post=610503"},{"taxonomy":"msr-pillar","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-pillar?post=610503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}