Question about HP Scanjet 5590 Flatbed Scanner

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I do not see how to set the DPI for better resolution on scans. Can you help me with that?

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  • dave851 May 31, 2010

    Thank you very much for the details.

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First of all let's clean up some things.When scanning materials it is important to understand the concept of DPI (dots per inch). DPI is a specification used for printed (and scanned) media that determines quality. Scanned images with a higher DPI will look more realistic compared to the original, but scanning at a high DPI can take a long time and use large amounts of disk space. While DPI refers to physical dimensions, the resolution of the image refers to the size of the image relative to your computer screen. A file that is 4000 x 5000 pixels is ideal for archiving, but would take a long time to download on the Internet.So it's a matter of use the right DPI setting. You can read some more usefull things here; it' a 10 tip guide from HP. In case of a problem or clarification, don't hesitate to post me a reply. If you are satisfied, rate my solution with the "thumbs" or add a testimonial. Thanks and regards Please kindly rate this solution Stelios direct FixYa link: http://www.fixya.com/users/technical114

Posted on May 30, 2010

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I have used last 4 year canon 2900B printer. How to set 300 dpi printing resoluation


Canon PIXMA Manuals MG2900 series Resolution
Resolution The data in the image you have scanned is a collection of dots carrying information about brightness and color. The density of these dots is called "resolution", and resolution will determine the amount of detail your image contains. The unit of resolution is dots per inch (dpi). Dpi is the number of dots per inch (2.5 cm). The higher the resolution (value), the more detail in your image; the lower the resolution (value), the less detail.

How to Set the Resolution You can set the resolution in Resolution on the (Scanning from a Computer) tab of the Settings dialog.
Appropriate Resolution Settings Set the resolution according to the use of the scanned image.
Item Type Use Color Mode Appropriate Resolution Color photo Copying
(Printing) Color 300 dpi Creating a postcard Color 300 dpi Saving to a computer Color 300 dpi Using on a website or attaching to e-mail Color 150 dpi Black and white photo Saving to a computer Grayscale 300 dpi Using on a website or attaching to e-mail Grayscale 150 dpi Text document (document or magazine) Copying Color, Grayscale, or Black and White 300 dpi Attaching to e-mail Color, Grayscale, or Black and White 150 dpi Scanning text using OCR Color or Grayscale 300 dpi Important
  • If you double the resolution, the data size of the scanned image quadruples. If the file is too large, the processing speed will slow down significantly, and you will experience inconvenience such as lack of memory. Set the minimum required resolution according to the use of the image.
Note
  • When you will be printing the scanned image by enlarging it, scan by setting a higher resolution than the recommended one above.


Oct 07, 2014 | Canon LASER SHOT LBP-2900 Printer

Tip

LPI, PPI,DPI conversions


Here is a conversion chart for DPI (Dots per inch) to LPI (Lines per inch) or PPI (Pixels per inch)

180 DPI................31 lines/inch or 68 PPI
360 DPI................63 lines/inch or 138 PPI
720 DPI................127 lines/inch or 280 PPI
1440 DPI..............255 lines/inch or 561 PPI
2880 DPI..................510 lines/inch or 1122 PPI

If you plan to enlarge your image, it is better to enlarge it when you're scanning rather than in your application. Each time you modify
an image, you lose some quality. Keep in mind when you enlarge a small photo, such as a 35 mm slide or wallet-size photo, you'll need
to scan at a high enough resolution to retain your image quality, but not so high that your file size is too large to be efficient. You must
manually adjust the resolution (dpi) to maintain the same image quality when you resize your image. For example, if you have a 300
dpi 2 x 2-inch image that you want to enlarge to 4 x 4 (a factor of 200%), increase the Scale setting to 200% or change the resolution to 600 dpi.

on Jul 19, 2008 | Epson Perfection V200 Flatbed Scanner

1 Answer

How do I reduce scan file size when the resolution is already 200 dpi?


An 8.5 inch wide document scanned at 200 dpi gives you an image that is 1700 pixels wide. This is almost enough to fill a fullHD TV screen at native resolution (1920 pixels wide) which is unnecessary detail. I would use any picture editing programme (many free ones available) to reduce the overall pixel width of your already scanned images by 50 percent. This will automatically reduce the 1MB image to 250k. If you can scan again, use 100 dpi to scan - the result is same; image will be half as wide (and long), and picture file size one quarter of the 200 dpi scan.

Sep 12, 2017 | Samsung CLX6220FX AllInOne Laser Printer

1 Answer

I scan alot and am told that the itmes I scan are not very legiable. Also it is squealing a little.


You can start with better quality originals. You can increase the resolution to 400 dpi, 600 dpi. The file sizes will be bigger and would require more time processing.

Jan 09, 2014 | Visioneer 9450 Flatbed Scanner

2 Answers

My laser mfp 1815dn is reducing the size of the image of the document i am scanning. how do i get it back to scan and save a full page?


Welcome to Fixya!

Adjust the Scan setting to the defalult/appropriate resolution. See guidelines below.

Documents:

300 dpi black-and-white or 200 dpi grayscale or color


Documents of poor quality or that contain small text:

400 dpi black-and-white or 300 dpi grayscale


Photographs and pictures:


100-200 dpi color or 200 dpi grayscale



Thank you for using Fixya. Have a great day.

Jas247

Jul 12, 2011 | Dell Printers:Dell MFP Laser Printer...

1 Answer

Scans are taking a long time to scan.


1) Your scanning image resolution may be too higher set 300 dpi / 400 dpi / 600 dpi. Scanning now fast.... not ok look step 2
2) Re-Install Scanner driver / down load new driver. not ok look step 3
2) Replace USB cable.

Mar 28, 2011 | Canon CanoScan 8600F Flatbed Scanner

1 Answer

How to adjust the resolution to 300 DPI on an


If you are scanning, you should be able to set the resolution (DPI x DPI) in the scanner configuration. If it is blurry, it could be that the default scan resolution is lower (10 dpi or even 75 dpi).
Settings location will depend on the scanner and software used.

Best scan at an equal (300 dpi) or even higher resolution, so you can scale the image afterwards without quality loss.

Apr 23, 2010 | Microsoft Windows XP Home Edition

1 Answer

Scan settings


On the printer you can only change the print quality with the quality button, good better or best, or the contrast settings with that button, all others like DPI for resolution have to be selected from your scan software on the computer.

Feb 01, 2010 | Brother MFC-5890cn Color Flatbed...

2 Answers

I have recently purchased HP SCANJET G4050 , before the purchasing of device HP executives said that it has 3-D effect and it takes same time to scan for any resolution means higher resolution also but now...


when you scan at 1200 dpi its usually over 100 mb which is a waste of time but it is great to use when you want something to be outstanding but the best resolution is at 600 dpi which is what my scanner is set to its good resolution but requires alot less data around 4-5 mb so it save time but its good to have the 1200 dpi for project that you want to impress or scan pictures but you dont have to use 1200 everytime hope my opinion was helpful:)

Nov 16, 2009 | HP PSC 2355 All-In-One InkJet Printer

1 Answer

They keep telling me that my picture is too big . It is a 4X6 picture on my computer.


More information on exactly what you are trying to do would be helpful... But it sounds like it's a resolution problem. Computer monitors usually display 72 or 96 dpi (Dots Per Inch) Printers usually print out images at 300 or 600 dpi Some newspapers are printed at only 50 dpi Scanners can scan a photo in thousands of dpi...
If your photo is a 4x6 at 300dpi, then when they try to display it in 72dpi, it will display as just a bit larger than a 16x20" image
When you are scanning a photo to email, then make sure that you set your resolution to 72 dpi to display on the screen - or vice versa, if you are going to print something, make sure you scan it at 300dpi
If you have any graphic programs, (Microsoft offers "PowerToys" for Windows XP) you can open the file in that, and usually find a setting for the Image Size that will let you set a new DPI. It's usually ok to lower an image's dpi - but there is a loss of quality anytime you try to add dpi, since you are forcing the computer to "guess" what all those hundreds of dots should look like, and they aren't good at that.

Oct 29, 2009 | Cameras

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