[{"data":1,"prerenderedAt":154},["ShallowReactive",2],{"project-22085666":3},{"id":4,"name":5,"line":6,"line_source":7,"title":8,"url":9,"domain":10,"maker":11,"posted_at":12,"year":13,"points":14,"comments":15,"rank_in_year":16,"shown_in_year":17,"top":18,"tier":19,"category":20,"subcategory":21,"format":22,"keywords":23,"reception":29,"sentiment":30,"stance_mix":31,"scored_comments":35,"aspects":36,"strip":40,"post_text":41,"what":42,"said":61,"maker_in_thread":98,"shape":101,"grid":105,"attempts":117,"same_week":118,"maker_shows":33,"maker_hidden":146,"reader_version":147,"card":148},"22085666","Hands-Free Heart Rate","Measure Pulse with Selfie Camera (iOS for Now)","title","Show HN: Hands-Free Heart Rate – Measure Pulse with Selfie Camera (iOS for Now)","https:\u002F\u002Fheartrate.hedronvision.com\u002Fdl?s=hn","heartrate.hedronvision.com","Firecracker",1579368627,2020,21,6,1649,3028,55,"shown","hardware","health sensing app","mobile_app",[24,25,26,27,28],"heart rate","pulse measurement","camera heart rate","photoplethysmography","selfie camera","mixed",0.303,{"positive":32,"neutral":33,"mixed":34,"critical":34},3,2,0,5,{"idea":37,"performance":39},{"positive":38,"critical":34},1,{"positive":34,"critical":34},[35,32,35,35,32,34],null,{"problem":43,"audience":41,"pricing":49,"motivation":41,"time_to_build":41,"stack":57,"openness":58,"stage":59,"team_size":60},{"value":44,"source":45,"evidence":46},"Measuring heart rate without a dedicated sensor, using a selfie camera.","maker",[47],{"id":48},"post",{"value":50,"source":51,"evidence":52},"Free","commenter",[53],{"id":54,"by":55,"text":56},"22085875","sredmond","Co-creator here! Feel free to ask us anything. Check it out if you can — it downloads really quickly, and it's free!",[],"free","launched","team",{"praise":62,"objections":76,"requests":81,"questions":89,"alternatives":97},[63,70],{"value":64,"source":51,"evidence":65},"Fascinating idea that consumer cameras can pick up subtle body motion and colour changes",[66],{"id":67,"by":68,"text":69},"22087752","ksaj","I saw a video showcasing this idea some time back. They showed slowed-down video that exaggerated both the colour red, and the lines on your face, neck and hands, following a…",{"value":71,"source":45,"evidence":72},"Works across lighting conditions, per the maker",[73],{"id":74,"by":11,"text":75},"22086439","We've tested across quite a few--and it should control for constant, weird lighting. But there are definitely edge cases that are hard to control for--a faint, pulsing red light…",[77],{"value":78,"source":45,"evidence":79},"Faint pulsing red light is a hard edge case for accuracy",[80],{"id":74,"by":11,"text":75},[82],{"value":83,"source":51,"evidence":84},"Android version",[85,86],{"id":67,"by":68,"text":69},{"id":87,"by":55,"text":88},"22088116","That's totally right! It's incredible just how much ambient information is visible to consumer cameras that human eyes and brains can't or don't process. We're always happy for…",[90],{"value":91,"source":51,"evidence":92},"Does it work in a variety of lighting conditions?",[93],{"id":94,"by":95,"text":96},"22086223","peterlu","Looks really awesome! Does it work in a variety of lighting conditions?",[],{"comments":38,"answered":38,"key":99},[100],{"id":74,"text":75},{"commenters":102,"max_depth":32,"maker_replies":38,"first_comment_mins":103,"lifespan_hours":104},4,33,31,[106,108,110,113,114,116],[67,34,35,107,68,34],"project\u002Fpositive\u002Fidea",[87,34,32,109,55,34],"maker\u002Fneutral\u002Fnone",[111,34,35,112,68,34],"22095314","project\u002Fpositive\u002Fnone",[54,38,35,112,55,34],[94,38,32,115,95,34],"project\u002Fneutral\u002Fperformance",[74,38,34,115,11,38],[],[119,124,129,133,138,142],{"id":120,"name":121,"points":122,"category":123},"22063744","No-Bullshit Games",520,"games",{"id":125,"name":126,"points":127,"category":128},"22073037","ESQLate",505,"dev_tools",{"id":130,"name":131,"points":132,"category":128},"22081419","OneDev",459,{"id":134,"name":135,"points":136,"category":137},"22091603","A set of standard document templates",433,"productivity",{"id":139,"name":140,"points":141,"category":137},"22065333","Screenshot Hero",429,{"id":143,"name":144,"points":145,"category":20},"22077052","sixty5o2",230,false,"v2",{"id":149,"name":5,"line":6,"ai":146,"cat":20,"year":13,"points":14,"comments":15,"rec":29,"s":150,"top":18,"kw":151,"maker":11,"domain":10,"tier":19,"attempts":34,"strip":152,"url":9,"mix":153,"praise":64,"objection":78,"sub":21},22085666,0.3,[24,25,26,27,28],"535530",[32,33,34,34],1793991002258]