He aha te mea he "Raster": definition, whakarōpū, iritiraa ki te pere

mohio Tetahi kaihoahoa aha te tauira. He mea nui ki te faaineine i te whakapakoko mo ratou whakarerekētanga, ngā whakatakotoranga hanga. e kore te mea nui hoki te rerekētanga whatunga kaiwhakamahi toharite i waenganui i ngā hōputu. Heoi, ko te taketake o te mahi ki te tuhi e kia mohio katoa, e hiahia ana ki te e taea ki te tukatuka whakaahua tenei.

Whakamāramatanga Raster, ona huapai me ngā huakore

He aha te mea he maheremoka? tito tenei whakapakoko e o te kopu o pika, pania te tetahi te tae. He ngāwari ki te kite, ahua nui nui ratou. Kōnae ki whakairoiro Raster pupuri te waehere kei roto i te maha o ngā me ratou tae. Photos, whakapakoko Karapa, whakaahua i roto i te mau ve'a, me i runga i te mata rorohiko - Raster. Ko te tukutuku o pika (ira) taea tuku he whakapakoko o tetahi whīwhiwhi, atarangi, rōnaki, rākau, Kauruku, 3D-pānga, me te ara hākoritanga. Photorealism - te painga matua o tenei momo o whakairoiro.

Ko te āhuatanga o Raster ngā te whai ake:

1. Ngoikore ki te āwhatatia. Kia rahi atu te whakapakoko (arā totoro te tukutuku o pika) ranei whakaiti reira (styanuv kia etahi o nga ngā ka kia ngaro), ka taea e tino whakanoatia image kounga.
2. iti te maheremoka te ki te tapawhā. Ko, ki runga ki tono o te tuhi i runga i ia atu nga raro "hiako" i raro i te papamuri runga ma.
3. Ko te matatini atu te whakapakoko, te atu e ata reira he kōnae.

āhuatanga Raster

rerekē whakapakoko Raster i roto i te rahi, taumira, ngā kōwae tae me te maha o ngā tae. Pai rawa hoki ngā āhuatanga o te mātiti. momo mohiotia o Raster momo kopu: auau, me te stochastic.

1. tatau te katoa maha o pika i roto i te whakapakoko i roto i CB (MB, GB) - Rahi (i te taimaha). Ko te pikitia nui me te matatini atu, te atu e ata reira.
2. Resolution - ko te maha o pika ia īnihi (ppi) i roto i te ipurangi whakapakoko, whakaahua, ranei ira ia īnihi (DPI) i roto i te whakaahua tā. Ko te nui o te uara, te pai te pikitia, mārama. whakapakoko taumira Paerewa Internet - 72 ppi, ngā whakatakotoranga tā - 300 ppi.
3. kōwae tae tautuhi te tupapaku taketake. pea tenei noa RGB, ka te whero, matomato, me te puru e hakari i roto i te moni i hoatu i roto i ia pika, me te ranu ki te hanga i te tae e hiahiatia ana. No te faaineine maha whakamahi whakatakotoranga CMYK - kōwae ngā o Urikiko, Kurauri, kōwhai, me te pango. Taiwhanga - ko "kanapa", te whero-matomato me puru-kowhai; Kiwikiwi - atarangi o hina.
4. Kia pehea te e whakawaeheretia maha paraire i roto i ia pika tei runga i te tae o te pikitia. I roto i te whakapakoko taetahi i ia wāhi e ata 1 moka. Ki te ngā i te tauira moka pika 4 o 16 tae. hoatu 8 bpp 256 tae, 16 paraire - 65K tae 24 paraire -. 16 miriona tae ..
5. Ko nga momo e whai ake nei o rasters, i runga i ngohi pika kei: he hanganga mata auau (ki ira tāuriuri mātiti ranei) stokahtichesky whakahaere pū kua kore, e whakaritea i.e. te pika matapōkeretia.

maheremoka pērā pere

I tua atu ki te hōputu Raster ko te pere - he ara ki te waihanga i tētahi tauira i roto i nei te pika o - āhua āhuahanga ohie: tapawhā, ovals, porowhita, rārangi torotika me te ānau. Kei kōnae whakairoiro pere tātai pāngarau - tau tawhā (diameter, roa, whanui, whakakiia tae, aratau), ratou wāhi i runga i te koaka (X me Y-ruruku) me te whanaunga tūnga ki ia atu. Vector tuhi i te zoom me te whakatika - tika huri nga āhuatanga o te ahanoa e hiahiatia ana. A, no te whakanui i a koe whakaiti ranei e kore e te ke tona kounga image. E kore te te pere pikitia iti ki te papamuri tapawhā - e taea te kōkuhu ratou ki tetahi ki tetahi. I roto i tenei take, e ata tino iti iho i te Raster te kōnae taketake.

Ki te pera maha painga e tenei e taea e mata whakahē i te pere? whakauaua taea te huaina Images i roto i tenei hōputu kiko - to ratou he whakaatu cartoon-rite iti tika ki te meka e whakamahi tae mārō me te rōnaki. Modern ētita whakairoiro - Corel te Draw, rite Adobe Illustrator - Ka taea e te mahi ki ngā pānga matatini rite atarangi, tae papanga, blurring, engari te kaha tukatuka Raster image ko reira tonu tawhiti. Ko te pere he whakatakotoranga rite hoki tā.

hōputu Raster

Ka taea te ora whakapakoko Raster i ngā hōputu, me te faafariuraa e wahi he kuware - e hiahia ana koe ki te whakatuwhera i te kōnae ki tetahi whakapakoko ētita, tīpako i te tūemi tahua "Tiaki rite" me te toronga tika.

GIF - te hōputu māmā. E tautoko ana i te māramatanga me te hākoritanga pānga, iti ata whakaaro, engari he iti te tae o reira - 256 tae. Ko te watea ki kauwhata toa, ngā tūtohi te GIF.

Ka whakamahia e PNG kōpeketanga Ngarokore me tautoko mārama, nui atu te tae atu i GIF.

Kei te whakamahia TIFF mo te whakawhiti i te Raster ki pere, kia rite ki te kore e tenei hōputu hanumi te paparanga i roto i te tuhi.

JPEG - te hōputu tino rongonui whakamahia hoki whakapakoko tonu, whakapakoko karapahia, whakapakoko tukutuku.

Me pēhea te ki te tahuri i Raster ki hōputu pere

Me ki te tahuri i te whakapakoko maheremoka puta ki te pere i roto i te kaihoahoa tahora i hanga, ranei, ki te hiahia koe ki te whakanuia te whakapakoko, te huri i te reira, kahore ngaro kounga. Translations ki pere - e kore te mahi mama, e kore e taea te takaro rite maha pānga whakaahua. Ki te tapiri aunoa te nui heke te kounga pikitia: kia hē ai te tae, ngaro taipitopito o te pikitia. Tenei hanga aunoatia ngā ahanoa i ngā rōpū o pika o rite tae, kei runga i te aratau o te maheremoka. Ki te he matatini te pikitia, ka taea e ahanoa hanga rawa nui kia, a whakatika ratou manawarau. E wātea ana i roto i te ētita Corel Drew Illustrator ranei Autorouting.

Ka taea te whiwhi image kounga pai i roto i anake te tapiri ā-. I roto i tenei tuhinga kaihoahoa taiawhio ra i te aratau me te atarangi te rōrahi hanga e superposing mongamonga rahi rerekē, me te tae o ki tahi e te tahi ranei. Ko te huarahi māmā ki te mahi i tenei i runga i te papa whakairoiro, stylus whakataki i te rārangi. He utu a tino taonga te whakapakoko hanga ā-pere.

... me te hurihia tumuaki tuarua

Rasterization - te tukanga o whakataki te ritenga, ka ki te kia whakamaoritanga he tuhi pere i roto i te Raster, hei tauira, ki te fakalahi reira ki atu whiriwhiringa whakaahua matatau. I roto i tenei take, nga āhuatanga pai katoa o te pere ngaro, e ko, ka waiho e taea ki te āwhatatia te whakapakoko hua i waho ngaro kounga. Na reira, ko te reira e minaminatia ki te pupuri i te kōnae taketake ki te whakanuia ranei te huri i te whakapakoko ki te tika.

I mua i te whakawhiti ki te mata (Tahuri ki Maheremoka) me whakaturia koe te tawhā e whai ake nei:

1. Tae - te maha o ngā tae i roto i te pikitia.
2. Dithered - ki te whakahohe koe i e tenei tae tūemi e hanga e mā te ranu.
3. Redolution - taumira.
4. Anti-aliasing - aho piere ranei ka kia mānia tahora tuatahi.
5. Trandparent Backgrounf - hanga tawhā te papamuri mārama.
6. Rahi - rahi.

Na, mo te mahi tika ki te pikitia e hiahia ana koe ki te mohio he aha te Raster me te pere. Raster image i hanga o te plurality o pika - iti huānga whakairoiro. Raster ātaahua, whakamahi maha pānga whakaahua, ara hākoritanga. Heoi, ki enei whakapakoko uaua āwhatatia me huringa. Vector, i runga i te anga ke, e mea ohie ki te whakaputa ke e huri i tetahi ahanoa tātuhi; i whakatauine te kounga tonu te taua. Heoi, ko te atarangi, rākau, rōnaki matatini me tae papanga ki te kawe i uaua. Ka taea e tuhi Raster e pā ana ki te whakaatu i roto i te hōputu pere, me te hurihia.