Co Ban Ve Scan
Gi Anh Huong Chat Luong Scan
| Yeu To | Anh Huong |
|---|---|
| Do phan giai (DPI) | Muc do chi tiet |
| Che do mau | Kich thuoc file va do chinh xac |
| Chat luong may scan | Han che phan cung |
| Tinh trang tai lieu | Nguon lieu quan trong |
| Ky thuat scan | Vi tri dat, anh sang |
Huong Dan Do Phan Giai
Khuyen Nghi DPI (Cham Moi Inch)
| Loai Tai Lieu | DPI Toi Thieu | Khuyen Nghi |
|---|---|---|
| Tai lieu van ban | 200 | 300 |
| Anh, hinh anh | 300 | 600 |
| Chu nho | 300 | 400-600 |
| Chat luong luu tru | 400 | 600+ |
| Bieu mau don gian | 150 | 200-300 |
Danh Doi Do Phan Giai
| DPI | Chat Luong | Kich Thuoc File | Thoi Gian Scan |
|---|---|---|---|
| 150 | Thap | Nho | Nhanh |
| 300 | Tot | Trung binh | Vua |
| 600 | Cao | Lon | Cham |
| 1200 | Rat Cao | Rat Lon | Rat Cham |
Chon Che Do Mau
Giai Thich Cac Tuy Chon
Den & Trang (1-bit):- Pixel den hoac trang thuan
- File nho nhat
- Tot cho tai lieu chi van ban
- Te cho anh hoac vung xam
- 256 sac do xam
- Kich thuoc file trung binh
- Tot cho van ban voi hinh anh
- Khuyen nghi cho hau het tai lieu
- Mau day du
- File lon nhat
- Chi can thiet khi mau quan trong
- Tai lieu tiep thi, anh
Khi Nao Su Dung Moi Loai
| Tai Lieu | Che Do Khuyen Nghi |
|---|---|
| Tai lieu van ban | Thang do xam |
| Bien lai | Thang do xam |
| Hop dong | Thang do xam |
| Anh | Mau |
| So do co mau | Mau |
| Bieu mau ma mau | Mau |
| Van ban den don gian | Den & Trang |
Danh Sach Kiem Tra Cai Dat May Scan
Truoc khi scan:
- Lam sach kinh may scan
- Kiem tra huong tai lieu
- Go ghim, kep
- Lam phang tai lieu bi gap
- Chon cai dat phu hop
Cai dat toi uu:
- Do phan giai: 300 DPI cho hau het su dung
- Che do mau: Thang do xam tru khi can mau
- Dinh dang file: Truc tiep PDF, hoac TIFF de chinh sua
- Nen: Thap den trung binh cho chat luong
Chuan Bi Tai Lieu
Chuan bi vat ly:
- Go ghim va kep giay
- Lam phang cac nep gap
- Lam sach bui va rac
- Sua chua ve rach neu co the
- Tach cac trang bi dinh
Dinh vi:
- Dat tai lieu thang tren may scan
- Su dung huong dan mep neu co
- Tranh dat lech
- Dat tai lieu nho o giua
- Uc xuong tren may scan phang
Cac Loai May Scan
May Scan Phang
Tot nhat cho:- Sach va tai lieu dong
- Anh
- Tai lieu mong manh
- Chat luong cao nhat
- Dong nap nhe nhang tren vat day
- Su dung giay lot trang cho tai lieu mong
- Lam sach kinh thuong xuyen
May Scan To Giay
Tot nhat cho:- Scan khoi luong lon
- Tai lieu van phong tieu chuan
- Tai lieu nhieu trang
- Quat trang truoc khi nap
- Go giay dinh
- Kiem tra ket giay
- Tranh trang bi hu
Scan Bang Dien Thoai/May Anh
Tot nhat cho:- Chup nhanh
- Scan tu xa
- Khi khong co may scan
- Su dung anh sang tot
- Giu dien thoai song song voi tai lieu
- Su dung ung dung scan (khong chi may anh)
- Tranh bong
Ung Dung Khuyen Nghi:
- Adobe Scan (mien phi, OCR tot)
- Microsoft Lens
- CamScanner
- Genius Scan
Scan Nhieu Trang
Su dung ADF (Nap Tai Lieu Tu Dong):
- Go ghim
- Quat trang
- Nap mat len (thuong)
- Chon tuy chon PDF nhieu trang
- Theo doi ket giay
Khong co ADF:
- Scan trang dau tien
- Su dung tuy chon "Them Trang" hoac noi them
- Tiep tuc scan
- Luu thanh mot PDF
Xu Ly Sau Scan
Cai thien PDF scan:
Deskew: Lam thang trang nghieng Cat: Loai bo le thua Tuong phan: Cai thien kha nang doc Loai dom: Loai bo dau nhieu/bui OCR: Them lop van ban de tim kiemCong cu hau xu ly:
- Adobe Acrobat
- ScanTailor (mien phi, cho sach)
- NAPS2 (phan mem scan mien phi)
- VueScan
Toi Uu Kich Thuoc File
Giam kich thuoc file scan:
| Phuong Phap | Giam Kich Thuoc | Anh Huong Chat Luong |
|---|---|---|
| DPI thap hon | Cao | Trung binh |
| Thang do xam | Trung binh | Thap/Khong |
| Nen JPEG | Trung binh | Thay doi |
| Den & Trang | Rat Cao | Cao cho hinh anh |
Cach tiep can khuyen nghi:
- Scan o do phan giai phu hop (khong qua muc)
- Su dung thang do xam tru khi can mau
- Ap dung nen PDF sau khi scan
- Can bang kich thuoc vs. chat luong cho muc dich su dung
Can Nhac OCR
Cho PDF co the tim kiem:
Chat luong scan quan trong cho OCR:- Toi thieu 300 DPI
- Tuong phan tot
- Can chinh thang
- Tai lieu nguon sach
- Adobe Acrobat (do chinh xac tot)
- Google Drive (tai len, mo bang Docs)
- ABBYY FineReader (do chinh xac tuyet voi)
- Tesseract (mien phi, dong lenh)
Van De Thuong Gap va Giai Phap
Van De: Scan Qua Toi/Sang
Nguyen nhan:- Cai dat do sang sai
- Ban goc bi mo
- Hieu chinh may scan
- Dieu chinh do sang/tuong phan
- Su dung tu dong cai thien
- Hieu chinh lai may scan
Van De: Van Ban Mo
Nguyen nhan:- Do phan giai thap
- Tai lieu di chuyen khi scan
- Kinh may scan ban
- Tang DPI
- Giu tai lieu phang
- Lam sach may scan
Van De: Kich Thuoc File Lon
Nguyen nhan:- Do phan giai qua cao
- Che do mau khi khong can thiet
- Khong nen
- Giam DPI xuong 300
- Su dung thang do xam
- Ap dung nen PDF
Van De: Trang Bi Lech
Nguyen nhan:- Tai lieu khong can chinh
- Trang di chuyen khi scan
- ADF lech
- Su dung huong dan can chinh
- Ap dung deskew trong phan mem
- Dieu chinh huong dan ADF
Khuyen Nghi Phan Mem May Scan
Tuy chon mien phi:
- NAPS2: Phan mem scan mien phi tuyet voi (Windows)
- Windows Scan: Tuy chon tich hop co ban
- Image Capture: Tich hop Mac
- Simple Scan: Mac dinh Linux
Tuy chon tra phi:
- VueScan: Hoat dong voi may scan cu
- Adobe Acrobat: Day du tinh nang
- Kofax: Scan doanh nghiep
Quy Trinh Scan Hang Loat
Cho du an scan lon:
- Sap xep tai lieu theo loai/kich thuoc
- Thiet lap quy uoc dat ten
- Cau hinh cai dat hang loat
- Thu nghiem voi trang mau
- Scan theo lo
- Kiem tra chat luong dinh ky
- Ap dung OCR neu can
- Sao luu ket qua
Scan Luu Tru
Cho bao quan dai han:
| Yeu Cau | Khuyen Nghi |
|---|---|
| Do phan giai | 400-600 DPI |
| Che do mau | Nhu ban goc (bao toan mau) |
| Dinh dang | PDF/A hoac TIFF |
| Nen | Khong mat du lieu (ZIP/LZW) |
| Metadata | Bao gom mo ta |
| Luu tru | Nhieu ban sao, vi tri khac nhau |
Ket Luan
Scan chat luong bat dau tu cai dat dung: 300 DPI thang do xam xu ly tot hau het tai lieu. Chuan bi tai lieu dung cach, giu may scan sach, va su dung hau xu ly phu hop. Cho PDF co the tim kiem, dam bao scan du chat luong cao cho OCR chinh xac. Khop cai dat voi nhu cau thuc te - cao hon khong phai luc nao cung tot hon khi tao file lon khong can thiet.