[he3d]

The performance of the scanner
Main performance indexes are x, y direction of the scanner, the resolution of the color resolution (color number) and the way of scanning width

and interfaces.All kinds of scanners are clearly indicate its optical resolution and maximum resolution.Resolution of a single


Dpi, dpi is English Dot Per Inch, the pixel points Per Inch.


1. What is the optical resolution?


Optical resolution refers to the optical scanner system can collect the actual amount of information, also is the resolution of the sensor, CCD

scanners.Such as maximum scanning range is 216 mm x 297 mm (scan) suitable for A4 paper


Instrument can scan the maximum width of 8.5 inches (216 mm), the CCD contains 5100 units, its optical resolution of 5100 points / 8.5 inch =

600 dpi.Common optical resolution of 300 x 600, 600 by 1200,


1000 * 2000 or higher.


2. What is the maximum resolution?


Maximum resolution also known as interpolation resolution, it is between the adjacent pixels increasing number of colors or grayscale average

method.Interpolation algorithm to increase the number, but it can't add the real image detail, because of


This, we should attach more importance to optical resolution.
3. What is the color resolution?


Color resolution and color depth, color, pattern, color or color order, in a word are markers of scanner resolution color or gray degree of

exquisite, it is the unit of bit (bit).


Color a precise meaning is to use how many bits to represent a pixel scanning.For example: 1 bit said only black and white pixels, because the

number in the computer using binary, 1 bit said only two values (21 = 2) and 0


1, they represent black and white.8 bit can represent 256 grayscale (28 = 256), they represent different grey scale from black to white.24 bit

can represent 16777216 kinds of colors (224 = 16777216), red (R


), green (G), blue (B) each channel occupies the first 8 bit respectively, each with 2 ^ 8 = 256 level, the general said more than 24 bit colour

for true color, and of course use 30 bit bit, 36, 42 bit model.


Theoretically, the more color figures, the color is more realistic, but for non-expert users, due to the computer processing power and output

printer resolution limit, the pursuit of high color a wave will only bring to us


Fee.


4. What is the TWAIN?


TWAIN (Technology Without An Interesting Name) is a common follow the specifications of the scanner manufacturer, is a standard interface

between the application and the image capture device.As long as is to support the TWAIN driver


Can be started in accordance with the specifications of the scanner.


Can start the scanner in the Microsoft Word, for example, is to open the menu bar "insert" to "image", "from the scanner.Using the method of

Adobe Photoshop can do it, too, are open


"File" to "Import", "Select TWAIN_32 Source".


5. What is the interface way?


Interface way to connect (interface) refers to the scanner and the computer using the interface type.Commonly used with USB interface, SCSI

interface and parallel printer interface.Fastest SCSI interface transmission, and use parallel printer


The interface is more convenient.

[awerby]

This sounds like it was cribbed from a Chinese instruction manual for an old flatbed scanner and run through Google Translate. What does any of this have to do with CNC? This is all about 2D scanners; we use 3D scanners - they are entirely different.

[derek]

I've seen a few of these kind of posts in other forums as well.
Not sure whats up

[he3d]

Is so ah, I just want to learn more knowledge by discussion, thank you for your guidance.

[he3d]

You are also looking at the 3 d printer BBS?Me too, I just want to learn more, and you?