Mene ne wani Samfur? Samfur mita

Mene ne digitization, a yau sanin wani kwararren a fagen dijital daukar hoto. Duk da haka, mutane da yawa suka kawai fara samun Masana wannan yankin, ba su sani ba ta babban fasali, haka cewa zai iya kauce wa wasu kuskure.

Mene ne wannan?

Mene ne wani Samfur? Wannan ke so sakamako, wadda take kaiwa zuwa gaskiya cewa hoto ingancin ne remarkably rincabewa. Wannan sabon abu iya hade da wani na'urar ko tsari, a cikin abin da bayanai ne zuwa kashi da dama daban samfurori. A wannan yanayin, Samfur za a iya daukarsa a irin tsangwama juna, idan akwai wani dangantaka tsakanin mita na sabon abu da kuma gano lokaci-lokaci tsarin a cikin bayanai.

A adam ido ne kullum jihãdi don tabbatar da cewa, na tsinkãyi wata wasu rabo a matsayin kutse kwaikwaya da za hana mutane real ma'anar hoto. Idan akai la'akari da misalai na abin da daukan samfur, shi ne don samar da wani moire juna, wanda ba quite daidai tasirinta, amma shi iya nuna yadda wani mutum da aka batar a cikin akwati a lokacin da biyu alamu an fara hul] a da juna, kafa uku.

Mene ne moiré?

Moire ne m wavy juna, wanda ya asali ba ba a kan batun. Wannan sakamako ne mafi kusantar su faru ne a daban-daban images cewa an samu ta hanyar digital na'urorin. Kuma matsalar a nan shi ne cewa abu juna ne superimposed a kan jeri juna na pixels a kan matrix, inda akwai wata uku, da ake kira mai moire.

Advantageously yawancin lokuta wannan tasirin ne ke faruwa a high bambanci cikakken images cewa ba dace da ƙuduri mai ban mamaki kaga masu auna sigina. A musamman, shi za a iya samu akai-akai a cikin akwati cire abubuwa kamar gashi ko zane, kazalika da mãkirci, da samar da wani babban yawan Kwafin sassa. Sau da yawa, moire ba za a iya samu a cikin yanayi, kamar yadda yakan faru a cikin images, wanda ake samu ta wajen wani digital ko duba baya rashin amfani.

Popular sau da yawa, a yau dijital kyamarori, domin rage wannan sakamako, yi amfani da wani musamman Tantancewar low-izinin tace, don haka idan kana da gaske za fasaha aiki a cikin daukar hoto, a cikin wannan yanayin, ya kamata ka ko da yaushe tunani game da model tare da wannan alama, wadda za ta iya samar da isasshen inganci ne dangane da sakandare yanayi.

Discretization a zamani kyamarori

A yau dijital na'urori, da daukan samfur sakamako ne saboda gaskiyar cewa bayanai ne zuwa kashi da dama samfurori a yau da kullum jinkiri. A musamman, daya daga cikin alamu a cikin wannan yanayin ne wuri na pixels a kan matrix, na biyu juna ne da wani abubuwa a cikin hoton, wanda za a iya maimaita kan wani babban yanki ko wanda aka canza bayan wani yawan pixels a mai gangara ko a tsaye shugabanci.

Ga waɗanda ba su gane abin da yake daukan samfur da kuma lokacin da ta taso, ba za ka iya ba wani takamaiman misali. Lokacin da akwai kasa kasancewa da yawan pixels to kai m bayanai ga image, wanda idan ba a mafi ingancin. A misali version zai zama isa kawai don zaɓar mafi girma ƙuduri, haka na tabbatar da ganin gyaran da ake bukata yawan pixels ga watsa sassa a cikin hoto tare da wasu daidaito, da kuma idan yawan pixels ba zai zama isa, muna iya kawai ga kananan yawan abubuwa na image.

Duk da haka, a gaskiya wannan ba gaskiya ba ne. Samfur ka'idar ya furta cewa, a gaskiya da halin da ake ciki shi ne yafi korau, kuma idan ba za mu da isasshen yawan pixels domin yin wasu hoto, sa'an nan hoton ingancin za deteriorate ci gaba.

Yadda yawa pixels ka bukatar?

Dauki misali da halin da ake ciki a lokacin da akwai wani hoto kawai 20 baki da fari Lines kowane ciwon nisa na 5 pixels. A wannan yanayin, idan akalla daya pixel da aka bayar ga kowane layi, hoton za a iya rubuta. Babu shakka, idan pixels ba fada a fili a cikin tsakiyar kowane layi, a wannan yanayin, kowane pixel za su juya launin toka, ba fari ko baki, da inuwarta riga kai tsaye zai dogara ne a kan yadda za a pixel tana wurinta dangi da Lines.

Idan yawan pixels a cikin hoton za ta rage, to, a wannan lõkacin, wasu daga cikinsu za a bayar da tsakanin Lines, don haka da cewa image bayyana a sama fasalin da zai ci gaba bambanta dangane da abin da hulda da yake a cikin tazara tsakanin Lines da kuma yawan pixels. Hakika, wannan hoton ba zai zama ainihin haifuwa na asali, kamar yadda na yau da kullum tsarin da Lines An riga an kula sosai. Shi ne wannan sabon abu da ake kira "data Samfur" a sana'a da'irori.

Abin da ya yi?

Don warware wannan matsala, wajibi ne a yi laushi zuwa hoton kafin ka rage yawan pixels. Saboda haka, za ka iya gaba daya rabu da mu da kaifafan gefuna a kan kowane layi, da kuma pixels iya daukar tsaka-tsaki dabi'u. A wasu kalmomin, da image zama softer, amma ya bar overall ra'ayi na image.

Yaya wannan ya shafi hoton?

Hakika, da maimaita kuma na yau da kullum tsarin da Lines za a iya samu quite rare a cikin hotuna na daban-daban na halitta abubuwa - kasancewarsu ne sau da yawa iyakance zuwa images of daban-daban wucin gadi Tsarin kamar gine-gine da kuma kaya. Duk da haka, a cikin wani hali, da daukan samfur zurfin iya zama da ban sha'awa, don haka wannan sakamako ne ko da yaushe kauce masa yin wani harbi abubuwa.

Shi ne ya kamata a lura da cewa image quality iya zama cikakken daban-daban, har ma idan suna da wannan yawan pixels. Bayan duk, a cikin wasu abubuwa, bambanci tsakanin images iya zama a daidai yadda aka samu. Alal misali, a daya faru, da image iya da ɗan saukake ta wucewa da shi ta hanyar wani low izinin tace to samu tsaka-pixel dabi'u kafin rage size, alhãli kuwa wani image iya kawai rage a cikin size ba tare da yin shi kamar haka babu ƙarin canje-canje kuma ba matsakaici dabi'u a da iyakoki da abubuwa inda akwai sosai ba zato canje-canje a cikin haske.

Yadda za a duba?

Don gane da yadda yake aiki, kawai isa ya dauki hoto, sa'an nan kuma yin kwafin. Original tace idan resizing tare da zabin da ake kira bi-cubic tacewa, wanda shi ne samuwa a cikin misali Adobe Photoshop. Saboda haka, hoton da za a saukake. Duk da alama karu a pixel, da miƙa mulki tsakanin tonalities ƙarshe bayyana santsi da kuma quite dace da samuwa yawan pixels.

Bayan haka, mun sanya wani kwafin na hotuna rage-rage a baya, ka ce, har zuwa 30% na asali size, ta amfani da zabin "mafi kusa makwabcin ma'ana" a cikin wannan shirin. Wannan aiki kyakkyawan zai ba ka Samfur sakamako, wanda zai zama bayyananne.

audio Sample

Audio Samfurin - mai tacewa daga cikin sauti kalaman da shi zai sami ceto a matsayin audio fayil. A wasu kalmomin, da manufa fayil ba ainihin kwafin na sauti kalaman, amma kawai m. A daya hannun, da audio samfurin samar da wani tabbataccen ƙi a ajiye fayil, amma a daya hannun akwai kuri'a na sauti vibrations, wanda zai iya ba dole ba ne a adana a kan rumbunka.

Irin wannan sauti tacewa kira "Samfur mita". Shi ne ya kamata a lura da cewa a gaskiya kawai a cikin yanayin babu wani sauti da wannan sakamako, ko 'yan sani game da shi. Samfur rate - ne Kaddamar da wani takamaiman tashar wutar lantarki zuwa wani sauti kalaman, kuma rikodin kawai wasu key abubuwa.

Record cikakken duk da sauti taguwar ruwa zai zama quite wuya. Yana da wannan dalilin cewa, fiye da za a iya samu a halin da ake ciki inda biyu-tashar sauti rikodi da aka yi tare da wata Samfur mita 44.1 kHz. A karshen mafi sau da yawa zaba, kamar yadda wannan ne mafi wani zaɓi.

A gaskiya, idan akai la'akari da sauti da aiki, wajibi ne a biya musamman da hankali ga irin sigogi kamar yadda coding zurfin da samfurin kudi, saboda rates ne mafi girma, da girma da sigina na dijital za su dace da akwatin tilbijin na analog.