Multimédiá a telematika pre mobilné platformy ERIK KUČERA, OTO HAFFNER, PAVOL BISTÁK I-MTMP

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1 Multimédiá a telematika pre mobilné platformy ERIK KUČERA, OTO HAFFNER, PAVOL BISTÁK I-MTMP

2 Video I. OTO HAFFNER

3 Prečo sa učiť o 3 multimédiach/videu? Všeobecný rozhľad Spracujem si video z dovolenky Zhodnotím kvalitu práce svadobného kameramana Odhalím FAKE video na internete... Pracovný potenciál MicroStep Lepšia komunikácia s reklamnou agentúrou Lepšia komunikácia s objednávateľom videa Inžiniersky pohľad na vec Diera na trhu?

4 Prečo sa učiť o 4 multimédiach/videu? Firma Bluefaces Absolventi FEI STU Vizuálne efekty Práca na filmoch z Hollywoodu

5 BlueFaces showreel 5

6 Čo je cieľom tejto časti? 6 Vytvoriť jednoduchý trailer/upútavku na vašu aplikáciu

7 Ukazky z minulych rokov 7

8 Ukazky z minulych rokov 8

9 Ukazky z minulych rokov 9

10 BONUS 10

11 11

12 História Videa(filmu) 12 Sallie Gardner at a Gallop v r Stávka, ako beží kôň Auguste a Louis Lumièr 28. december 1895 v Paříži Prvé verejné predstavenie

13 História Videa(filmu) Najstarší dochovaný film

14 História Videa(filmu) Prvý film Lumièrovcov

15 Video Definícia 15 videografia (z Latinčiny, prvá osoba slovesa vidieť) technika elektronického snímania, záznamu, spracovania, prenosu a rekonštrukcie sekvencie statických obrázkov reprezentujúcich pohyblivé scény vzťahuje na ľubovoľnú metódu používajúcu video pásku alebo televíznu techniku pre tvorbu obrazu séria obrazových rámčekov integrovaná do jedného celku, jeden po druhom ktorá simuluje pohyb

16 Video 16 Čiernobiele video: Obraz je vytvorený iba jasovou zložkou obrazu. Farebné video: Analógové video luminančno-chromatické zložky farebný model - YUV (PAL), YIQ (NTSC) Digitálne video tri chromatické zložky farebný model YCbCr, RGB

17 Video YUV (PAL) k popisu farby sa používa 3 prvkový vektor [Y,U,V] Y- jasová zložka U,V farebné zložky 17 U Y V

18 Video RGB 18 Miešanie aditívnych farieb R- red G- green B- blue 8 bitov pre jeden komponent (0-255) RGBA zložka A (alfa kanál) priesvitnosť

19 Video RGB 19 R G B farba farba čierna čierna červená červená zelená zelená modrá modrá žltá žltá purpurová purpurová azúrová azúrová biela biela

20 Video HSV 20 Tento farebný model najviac zodpovedá ľudskému zraku Pozostáva z 3 hlavných zložiek (nie farieb): H- Hue: farbený tón, odtieň S- Saturation: sýtosť farby, množstvo šedi v odtieni V- Value- hodnota jasu, množstvo bieleho svetla

21 Video HSV 21

22 Video HSL 22 Pozostáva z 3 hlavných zložiek (nie farieb): H- Hue: farbený tón, odtieň S- Saturation: sýtosť farby, množstvo šedi v odtieni L- Lightness/luminosity- svetlosť

23 Video HSL HSV 23

24 Video Snímanie CCD (Charge Coupled Device) CMOS (Complementary Metal Oxide Semiconductor) matica svetlocitlivých prvkov pôsobiacich ako optoelektrické meniče Bayerova maska 24

25 Video Snímanie

26 Video Rušivé javy - Blooming 26 pretečenie fotónov do vedľajších senzorov

27 Video Rušivé javy - Jello effect 27 Rolling shutter vs Global shutter

28 Video Kodek Kóduje a dekóduje video z/do určitého formátu, väčšinou za účelom zmenšenia Stratové/bezstratové Najznámejšie stratové kodeky: H.262/MPEG-2 Part 2 (MPEG-2 Video) H.264/MPEG-4 AVC H.265/HEVC Apple ProRes 422/4444 DNxHD codec 28

29 Video Vzorkovanie Farebný video signál môže mať rôzne formy - kompozitný, prenáša sa jedným káblom a je najmenej kvalitný, S-Video (Y/C)má oddelený jas -Y (luminancia, luma) a farbu - C (chroma, chrominancia). Iný spôsob je prenos troch zložiek R,G,B alebo Y,U,V. Pretože oko je menej citlivé na farbu ako jas, nemusí byť farebná hĺbka taká ako jasová. To redukuje celkové frekvenčné pásmo video signálu. Podvzorkovanie sa vyjadruje tromi číslami vzorkovania - jas (Y), dve farebné komponenty (chroma) U/Cb a V/Cr pre každú vzorkovanú oblasť 29

30 Video Vzorkovanie Používajú sa nasledovné pomery vzorkovania 4:4:4 (najlepšia kvalita), 4:2:2 (postprodukčná kvalita), 4:1:1 (pre konverziu do analógového videa), 4:2:0, 4:1:0. Bitový prúd pri vzorkovaní 4:2:2 je Y 0 U 0 Y 1 V 1 Y 2 U 2 Y 3 V 3 a pri 4:1:0 je Y o0 U o0 Y o1 Y o2 Y o3 Y e0 V e0 Y e1 Y e2 Y e3 30

31 Video Vzorkovanie 31

32 Video Vzorkovanie 32

33 Video Formáty obrazu CIF (Common Intermediate Format) 33 SQCIF 128x96 QCIF 176x144 CIF 360x288 4CIF 720x576 16CIF 1440x1152 CCIR TV 720x576 HDTV 1280x720

34 Video Formáty obrazoviek 34 Štandard Pomer strán Širka Výška SVGA 4: WSVGA ~17: XGA 4: XGA+ 4: WXGA 16: WXGA 5: WXGA 16: SXGA 5: HD ~16: HD ~16: WXGA+ 16: HD+ 16: UXGA 4: WSXGA+ 16: FHD 16: WUXGA 16: WQHD 16: WQXGA 16: K UHD 16: K UHD 16:

35 Video Formáty obrazoviek 35

36 Video Pomer strán 36

37 Video Pomer strán 37

38 Video Pomer strán 38

39 Video pan and scan 39

40 Video pan and scan 40

41 Video pan and scan 41

42 Video anamorphic 42

43 Video anamorphic 43

44 Video Prvý film natočený digitálne (kamera pre spotrebiteľov) The last brodcast (1998) 44

45 Video Prvý film natočený digitálne (profi digitálna kamera) Star Wars: Episode I The Phantom Menace(1999) 45

46 Video Prevod filmu na digitálne video 46

47 Blackmagic Pocket Cinema Camera 47

48 Blackmagic Pocket Cinema Camera 48

49 Blackmagic Pocket Cinema Camera 49

50 Metabones speedbooster 50

51 Metabones speedbooster 51

52 DAVINCI RESOLVE 52

53 DAVINCI RESOLVE 53

54 DAVINCI RESOLVE 54 DAVINCI RESOLVE vs DAVINCI RESOLVE STUDIO Redukcia šumu Stereoscopic 3D HDR

55 DAVINCI RESOLVE 55 Users

56 DAVINCI RESOLVE 56 Users

57 DAVINCI RESOLVE 57 Media

58 DAVINCI RESOLVE 58 Edit

59 DAVINCI RESOLVE 59 Color

60 DAVINCI RESOLVE 60 Deliver

61 DAVINCI RESOLVE 61 RAW súbory

62 DAVINCI RESOLVE 62 Node Editor

63 DAVINCI RESOLVE 63 Automatic Color Match

64 DAVINCI RESOLVE 64 Power Windows

65 DAVINCI RESOLVE 65 Strih

66 DAVINCI RESOLVE 66 Multicam

67 DAVINCI RESOLVE 67 Multi layer Timeline

68 DAVINCI RESOLVE 68 Rendering

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