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ͧСͺͧкҿԡ

ҾҾҿԡҧ ѹ繹ѡеͧҾ鹻ҡѹպд ҿԡẺ¡ ҿԡẺʶԵ (Static Graphics) 繡Դ 㹡õͺʹͧҡ 1/10 Թҷ ѧҡ͹ͧʵꡡҨ繷Ѻ ͧҡ㹡蹹ҵͧáõͺʹͧẺѹշѹ Ҿҿԫա¹ŧʹẺеͧ¹ŧǾͷöǺҾ кẺ¡ кҿԡẺԹ͡տ (Interactive Graphics System) ѺкẺͧɫ觨ШѴ੾ͧǡѺʴҾСõͺʹͧ ҾդѺ͹͹ԧҡ ÷зҾա¹ŧҧǴǡҡ觢ҹ
кҿԡẺԹ͡տ ·仨лСͺǹӤѭ 4 ǹ , ҾѺʴҾ, ػóѺТŨҡػóѺþҾ 觵仨Ƕ֧´ͧǹСͺǹ

1. ҾѺʴҾ
Ҿǹҡѹ繨ҾԴǡѹѺҾͧ÷ȹ¡ѹ CRT (Cathrod Ray Tube) ʴǹСͺӤѭͧ CRT ׹硵͹ (Electron Gun) ͹л»Шź͡ ШźҹһШغǡ ҾҺÿ ҧШź仹鹨еͧҹкѺ⿡ к§ູШث繵ǺѧѺШź仡з㹵˹觷ͧ кѺ⿡ʨѺӻШźҷШźзѺҾ зԹشҧ Ҿ ǹк§ູШبлСͺ 2 ش (Ѻ§ູǹ͹С§ູǴ) ѺѺȷҧ觢ͧШźз˹觵ҧ ء˹觢ͧҾ
ͻШź觡зҾ ÿҺ躹ҾʧҤͧ͡ ͧʧТѺӹǹШźҪ ǹմӺҾ鹡ǹջШźչҡ仪 ʧԴ鹺ҾФ§ǢͧԹҷҹ ѧöҾͧԴáоԺеͧաԧШźӷ¤ 1 Թҷ Ҩ¡Ҿ ê (Refresh CRT) Ҿѧ͡ 2 Ẻ ᡹ (Raster Scan) Ẻ ùǡ (Random Vector) ֧ҨաҹҾͧẺ ·ѡҾẺ᡹ҡ ͧҡ繨ҾöѴǡѺʧ¡ҨҾẺùǡ
ѺҾաʹҾ CRT 蹡ѹ ǹСͺ Ǥ ջ׹硵͹ 3 ش Ѻʧ ᴧ չԹ ҾЩҺÿյ˹觨ش 觨Ѵҧٻ ШкǺ ͨѴҾöʴյҧ ͧ
ҾẺ᡹ ҾѺä·仨繨ҾẺ᡹ 觨Ҿ͡繨ش ӹǹҡ شҹǹСͺͧҾ硷ش¡ ԡ (Pixels Picture Elements) شҹШѴ§ѹẺç ·شѴͧ鹵ǹ͹Ѻ鹵Ǵ觡˹觨شͧ 鹵ǹ͹¡ ᡹ (Raster - Scan Lines) ѧ鹨ҾẺ֧¡ҨҾẺ᡹ سҾͧҾẺ᡹͸Ժ¤´ͧҾ (Resolution) 觡ͨӹǹԡ˹᡹ (Scan Line) Ѻӹǹ᡹պҾ 觤´ͧҾҡ㴡ʴҾ´ҡҹ ѺҾդ´ (Low-Resolution) ᡹ҳ 300 ᡹վԡŻҳ 400 ԡ ǹҾդ´٧ (High-Resolution) ᡹ҧ 1,000 鹨վԡҡ 1,000 ԡ ԧШźѧҾԴ繨شҧ鹨ٻẺ÷ӧҹ͹ ͨشҧԴ¢ͧҾ͹ШաԧШź˹觹繵˹ ҡ鹡ԧШź仵Ǣͧ᡹ҡ仢Ҩз觶֧شش Шз蹹仨Ҩж֧ش˹ҧҢͧҾ 躹᡹شǡСѺкǹԧШźٻ 觨Сз蹹¤ 1 Թҷ ӹǹ駷աԧШźúͺѧ㹪ǧ 1 Թҷ ¡ ѵê (Refresh Rate) ѺǹѺͧѵê 觡ҷ㹡ʴҾ˹觨Ҿ¡ (Frame Time) ֧ҾԡŷԴ鹨աèҧ仵ʹ 褹öͧ繡¹ŧ ͧҡѵêդҡ§֧ͨ餹Ҿҧͧ кҾҤᾧѡѵêҡѺ 30 駵Թҷ ѺٻẺ÷ӧҹҧ᡹鹨ӵӴѺ鹷 1, 鹷 2,.... ѧ͸Ժ¢ҧѹ Ҷҷ蹹鹨зҾԴáоԺͧҡѵê ᡹ǧͧҾѧШҧ ҧ᡹Ѻ硹·֡ҾШзҨҾоԺ ѭҷ¡¹ٻẺҧ᡹硹 Ǥ ᷹ҧ鹵ӴѺ 2 鹵͹鹵͹áҧ᡹Ţ鹷 1, 鹷 3, 鹷 5, ... ͹Ǥҧ᡹Ţѧ ֡Ҿѧҡ仹蹤ԴáоԺ ѺҾҤᾧ سҾբ Ըչ ѵê٧ 60 駵Թҷ 繵

㹡ʴҾ˹Ҿеͧվԡźҧشͧҧкҧشͧ״ ÷ШѴԴҾͧǹСͺ 3 ǹ㹡èѴù ѿ (Frame Buffer) , ǤǺʴҾ (Display Controller) ԸաŧҾ繵˹觢ͧԡŷѿ (Scan Conversion Algorithms)
1. ѿ ԡͨشШشҡ躹ҾʹͧѺҺԵ (Bit) ˹¤ǹ˹ ¡˹¤ǹѿ ͺԵ (Bit Map) Եҹж١ѡɳеҧ ˹¤ӷѿкҿԡѨغѹѡ¡͡ҡ˹¤ѡͧͧͷзöʴҾ͡ҧҾҧǴҡ ӹǹǢͧѿҡѺӹǹҾʴ ШӹǹѡͧѿҡѺӹǹԡŷ ú͡Ҵͧ˹¤ӷѿ Ҩк͡ٻͧӹǹԡŷöʴҾ Ҩк͡ٻӹǹԡѡٳӹǹԡǡ աԵ 1 ŧѿç˹㴡 Դ繨شҧҾç˹觷ʹͧѺѿ е˹觾ԡźҾе˹˹¤ӷʹͧѹѿж١ҧ֧ӴѺ (X,Y) · X ᷹ҵ˹觢ͧѡ ǹ Y ᷹˹觢ͧ ش (0,0) ͧкԡѴ¢ͧҾ ѿ᷹ԡШش鹨лСͺºԵӹǹ˹ ѺҾǴӫդ§ 2 дѺ ѿ§ 1 Ե (1-Bit-Plane Frame Buffer) 觵ҧѺҾẺҾẺǴӷդдѺѺ 1 ԡ еͧҡ 1 Ե 蹶ѿ 3 Ե 蹤 1 ԡŨդ᷹ԡŹ 8 (23) Ф᷹ 1 дѺ ᷹ 8 дѺ ҡдѺ 0 ֧дѺ 23-1 = 7 Ѻ÷ȹǴӶ 8 ԵѺ 1 ԡšöʴдѺ֧ 28 256 дѺѺкҾյͧâ 24 Ե (24 -Bit-Plane Frame Buffer) · 8 ԵѺդ ᴧ йԹ 觵ɮըҧ֧ 224 ҡѺ 16,777,216 ѺҾդ´ 512x512 ú еͧ˹¤Ӷ֧ 512x512x24 = 6,291,456 Ե ˹¤ӢͧäҤҵ ö˹¤ӢҴ ѧ鹢ŵ 1 ԡŨ֧§ 1 ֧ 4 Եҹ
2. ǤǺʴҾ ǹ 2 ͧ˹¡ʴҾ ǤǺʴҾ ǹҹҷѿմͺѿ (Video Buffer) 觨¹ҺԵҹѭҳҧ俿 ѺǺʴҾҾ ҧ ҵǤǺʴҾҺԵ 1 ѿբ 1 Ե;ԡ Դѭҳçѹ٧ CRT 觨ШѴԴشҧҾ㹵˹觷ʹͧѺŷ㹺ѿͧ
3. ԸաŧҾ繵˹觢ͧԡŷѿ ǹԸա͡кǹ÷㹡¹ ÷ҧҿԡ繤ҷ ö᷹Ҿҡͤ觹ŧѿ ѺкҿԡẺ᡹դسҾ٧աѴáʴҾ੾ ǹкҿԡäҤᾧѡ CPU ͧͧѺѺѴçҹҧ 觷÷ӧҹҡҡ ҡзкҿԡẺԹ͡տ ͧҡ㹡¹ŧҾ§硹¨еͧաäӹdzҡµ

2. ػóѺ
кԹ͡տҿԡöԴ͡ѺҿԡػóѺ 㹵͹ҨСǶ֧ػóѺŪԴաҹкҿԡ
ػóѺŷѡѹкҿԡ͡ 鹾 (Keyboard) ػóѺТ㹤 㴷á鹾ʷ᷹ѡù鹡ж١ͧ еö᷹÷ӧҹҧ˹ҿԡ
ػóѺաԴ˹觫觻Ѩغѹաѹҡ Ѻ鹾 (Mouse) ػóѺá˹˹Ҿ͡Ҿͧ 觻ҡ躹Ҿͧҧдǡ ÷ӧҹͧ繴ѧҾѭѡҧҧ˹Ѻ繵Ǫ ٻ١ ٻͧºǡ Ǫ͹仺Ҿ͹ͧ ǢͧջҨջ» աá¶֧͡Ҿͺdzӧҹ觵Ǫѧ ͹Сáͧ͡觢ͧͧ
ѧػóѺŪԴ ա ¨ҡѡѧաҹѹкҿԡ 㹧ҹ੾ҧ ᾴ (Paddle), ʵ (Joystick) ػó㹡, ҡʧ (Light Pen) ػóѺá ͧкҿԡ, Ԩ (Digitizer) ػóҤҤ͹ҧᾧ֧㹧ҹ ԨлСͺͧѺҴ ػó Ҩٻҧ͹ͻҡҡ ͧվԡѴ¡ѺԡѴҾѧҡҢͧԨ (Stylus) ҴŧͧԴҾҡҾ͹ѺҾҧͧ ҹСѺԨ ҹἹ (GIS) Чҹҧҹ CAD 繵

3. ػóʴźд
кҿԡաػóʴ 2 Ẻ ͧ (Printer) ѺͧҴ (Plotter) ѡɳС÷ӧҹᵡҧѹ
ͧѹ㹻ѨغѹªԴ ͧẺش (Dot-Matrix Printer) ͧҤҶ١ҡ Ҿҡþ֧դسҾӨ֧ҹҧ ´㹡þ㹪ǧ 10-120 ش͹ ѨغѹسҾ㹡þͧͧ쪹Դ٧ҡҤҡ٧ҡ蹡ѹ ͧաԴ˹觫觤سҾͧҾդسҾդ ͧẺմ֡ (Ink-Jet Printer) ͧẺդö㹡þҾҾʧҧ ´ 200 ش͹Ǣ ͡ҡѧ ͧẺ (Laser Printer) ѡǡѹѺͧ͡èҾդسҾҡ ҤҢͧػó쪹Դ֧٧仴 ѡ÷ӧҹͧͧСѺþҾẺ᡹ҡẺùǡ ͧҡþоѡɳ͡ҾҾŧдɷ᡹ ǹҾẺùǡ ػóʴŷͧҴ
ͧҴкҿԡªԴ 觪Դ觵ѡɳС÷ӧҹ ͧҴẺйҺ (Flatbed Plotter) úѧѺҡҢͧͧҴеͧ 2 ᡹ҧ᡹ дɨҧҡҡ仺д աԴ¡ ͧҴẺçк͡ (Drum Plotter) дɨж١ǹ᡹ع͹ ҡҡ١˹ ǹҡҡ͹᡹ǡѹҹ ͧҴöҾ鹷ҧդسҾͧ٧ ҾաкʧҨзչѡ ͧҡЪͧ֡ҡ ѧػóẺ֧СѺʴҾẺùǡ


http://www.geocities.com/websubstudent/graphic.html

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