Ключевые слова: abstract, audience, background, barcode, blur, blurred, blurry, bokeh, booth, business, classroom, concept, conference, convention, corporate, crowd, defocused, education, event, events, exhibition, festival, focus, group, guest, hall, host, launching, lecture, light, meeting, new, party, people, presentation, press, product, qr code, register, registration, release, room, scan, scanning, seminar, standing, talk, trade, walking,