The DPI refers to the dots per inch and refers to the image resolution. It is difficult to know what the DPI from photos from disposable cameras is. The scanner however does control the DPI of the scanned photo.
If the input is color, then the resolution is 400 dpi x 400 dpi.
9000 dpi scanner would give you great quality pictures.
DPI means dots per inch and it's more related to resolution on printers.
The amount of detail is usually concerned with the dpi of the scanner. dpi of ppi is dots per inch or pixels per inch; it is value which tells you how many little dots are used to represent an inch's worth of space. It is similar to the megapixel value of a camera. Higher dpi means more detail in general. Of course, the sensor that picks up the detail is important, too. Ask the manager in stores to offer you the scanner with highest dpi value. Hope this answer helped.
After downloading the drivers from http://www.pandp.com.tw/english.htm, any application that can access a scanner (like IrfanView or Microsoft Office Imaging) will be able to enter its interface (part of the driver) and select an option from: OCR ready document (300 dpi B/W), Photo (150 dpi True Color), Fax (200 dpi B/W), Prints (75 dpi True Color) and E-mail docs (150 dpi Gray Scale).
The Canon Pixma MP460 bubble jet printer with built in scanner specifications are up to 22cpm printing black and up to 17cpm printing color. Scanner resolution of 1200 x 2400 dpi optical and 19200 x 19200 dpi interpolated.
The Epson Perfection v33 scanner is ideal for photo scanning and editing. It is fully automatic, includes an LED display, and has 4800 x 9600 dpi resolution.
The quality of the laser. It can be a deal breaker if the laser isn't the best.
Low-volume = higher quality, plus it has more dpi and better color quality.
The Canon DR-2050C scanner scans in 24 bit color at an optical resolution of 600 dpi, allowing for true, photographic quality scans.
One can find Brother's scanner range in the User's manual that comes with the scanner. Once the scanner is installed the computer, one can also find the range in the scanner's setting.