Which is better, scanner or all-in-one machine?

First of all, you should understand the fundamental difference between EPOSN and Canon low-end machines:

EPSON V 10 is a scanner using CCD as scanning element. The advantage is that it can scan three-dimensional objects, such as the middle seam of books, and it can be scanned clearly. In addition, the simple point is that it can be scanned clearly without a scanning platform.

The disadvantage is that the CCD element is relatively thick, but V 10, V 100, V200 and V350 have all been improved and become thinner and lighter than other brands of CCD.

Canon Lide series adopts CIS component, which has short preheating time after starting and fast scanning speed of pure black documents, but the color effect is not ideal, and the difference between CIS and CCD is opposite. After CIS left the scanning platform, there was a black shadow around the computer image. Can't be changed.

Scan resolution is used to enlarge your image, and it has nothing to do with clarity. 300dpi scanning text, 600dpi scanning color photos is completely ok. The good and clear color to be scanned mainly depends on the light density (I won't explain this)

All the all-in-one machines use CIS. Because it is small and used for copying, the resolution is not high. A few models are CCD, but they are very expensive. It's the kind that digital enthusiasts like,

Do I need to scan it with a negative? Do you want to take out the old negatives at home and play? Yes ~! Just don't develop the film of the previous SLR camera, but scan it into the computer for PS modification to achieve the desired effect. (Many top photographers use 120, etc. )

Scanner is a device that uses photoelectric technology and digital processing technology to convert graphic or image information into digital signals through scanning.

Scanners are usually used as external instruments of computers, which capture images and convert them into digital input devices that computers can display, edit, store and output. Scanners can scan three-dimensional objects, such as photos, text pages, drawings, artistic pictures, photographic negatives, films, and even textiles, signs, printed board samples, etc. , and extract and convert original lines, graphics, characters, photos and plane objects into devices that can be edited and added to files. Scanner belongs to the input system of computer aided design (CAD). Through the interface of computer software, computer and output equipment (laser printer and laser plotter), a front-screen computer processing system suitable for office automation (OA) is formed, which is widely used in signboard, printed board and printing industry.