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Terms of Use

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Your continued use of the Site means that You agree to the amendments. As long as You comply with these Terms, ABBYY grants You a personal, non-exclusive, non-transferable, limited right to enter and use the Site.

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ABBYY does not warrant compliance with any foreign legislation. If You access the Site, You are solely responsible for compliance with all applicable local laws.

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Subscription Terms

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Partner Subscription Terms

The Partner Subscription Terms incorporate terms on subscription, billing and payment procedure for the use of ABBYY Software on a Subscription-based model by partners. You can review the full terms here.

May 2021

Swedish (Svenska)

Fotografera dokument

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Skanning är inte det enda sättet att skaffa bilder av dina dokument. Du kan fotografera dokument med en kamera eller mobiltelefon, öppna fotografierna i ABBYY FineReader 14 och tolka dem.

När du tar bilder av dokument bör du hålla ett antal faktorer i åtanke för att göra fotot bättre lämpat för tolkning. Dessa faktorer beskrivs i detalj i följande avsnitt:

Krav på kameran

Din kamera ska uppfylla följande krav för att du ska kunna skaffa dokumentbilder som kan tolkas med hög precision.

Rekommenderade kameraegenskaper

Upplösning: Bildsensor: 5 miljoner pixlar för A4-sidor. Det kan även fungera med mindre sensorer när du tar bilder av mindre dokument, som t.ex. visitkort.
Funktion för att avaktivera blixten
Manuell bländarkontroll, dvs. om Av-eller helmanuellt läge är tillgängligt
Manuellt fokus
En antiskakfunktion (bildstabilisering) eller möjlighet att använda ett stativ.
Optisk zoom

Minimikrav

Bildsensor: 2 miljoner pixlar för A4-sidor.
Variabelt fokusavstånd.

Om du vill ha detaljerad information om just din kamera kan du läsa i dokumentationen som medföljde kameran.

Belysning

Belysning påverkar till hög grad det resulterande fotots kvalitet.

Du uppnår bäst resultat med starkt och jämnt fördelat ljus, helst dagsljus. På soliga dagar kan du öka bländarnumret för att få en skarpare bild.

Använda blixt och extra ljuskällor

När du använder artificiellt ljus ska du använda två ljuskällor placerade så att skuggor eller glans undviks.
Stäng av blixten om det finns tillräckligt med ljus blixten för att undvika skarpt glansljus och skuggor. Vid användning av blixt i svagt ljus bör du fotografera på ett avstånd av cirka 50 cm.

Vi avråder från att använda blixten när du tar bilder av dokument som skrivits ut på glansigt papper. Jämför en glansig bild med en bild av bra kvalitet:

Om bilden är för mörk

Ställ in ett lägre bländarvärde.
Ställ in ett högre ISO-värde.
Använd manuellt fokus, då automatisk fokus inte är lika effektivt i dåliga ljusförhållanden.

Jämför en bild som är för mörk med en bild av bra kvalitet:

Ta foton

Du uppnår högkvalitativa dokumentfoton genom att placera kameran korrekt och följa dessa enkla rekommendationer.

Använd ett stativ när det är möjligt.
Linsen bör placeras parallellt med sidan. Avståndet mellan kameran och dokumentet bör väljas så att hela sidan passar inom ramen när du zoomar in. I de flesta fall kommer detta avstånd vara mellan 50 och 60 cm.
Släta ut pappersdokument eller boksidor (i synnerhet för tjocka böcker). Textrader får inte vara mer än 20 grader sneda, annars är det risk för att texten inte konverteras ordentligt.
Du får skarpare bilder genom att fokusera på bildens mittpunkt.
Aktivera antiskakfunktionen då längre exponering i dåliga ljusförhållanden kan ge dålig skärpa.
Använd den automatiska utlösarfunktionen. Detta kommer hindra kameran från att flytta sig när du trycker på utlösarknappen. Det rekommenderas att du använder den automatiska utlösarfunktionen även om du inte använder ett stativ.

Så förbättrar du en bild om:

Bilden är för mörk eller om kontrasten är för låg.
Lösning: Försök använda ljusare belysning. Om det inte är möjligt kan du pröva att ange ett lägre bländarvärde.
Bilden är inte tillräckligt skarp.
Lösning: Autofokus fungerar inte alltid i dåliga ljusförhållanden eller när du tar bilder från nära avstånd. Försök använda ljusare belysning. Använd ett stativ och en självutlösare för att undvika att kameran flyttar på sig när du tar bilden.

Om en bild bara är något suddig kan verktyget Fotokorrigering i OCR Editor:s bildredigerare hjälpa dig få bättre resultat. Se även: Om din dokumentbild har defekter och OCR-riktigheten är låg.

En del av bilden är inte tillräckligt skarp.
Lösning: Försök med att ange ett högre bländarvärde. Ta bilder från ett längre avstånd vid högsta, optiska zoom. Fokusera på en punkt mellan mitten och kanten på bilden.
Blixten orsakar glans.
Lösning: Stäng av blixten eller försök att använda andra ljuskällor och öka avståndet mellan kameran och dokumentet.

11/2/2018 4:19:58 PM

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