Tip & How-To about Computers & Internet

Simple way to Get Better Quality Scans

This tip describes and explains a common standard technique to correct and improve the contrast of the image, which enhances colors too. It is applicable to scanning both prints and film, and to editing later too. It uses the histogram tool in your scanner's driver or photo editor program, and is called Setting the Black and White Points. This discussion may appear to be about scanning, but this same technique works for scanner images, digital camera images, any image at all. The LCD display on better digital cameras shows this same histogram to allow judging the correct camera exposure at time of shooting, so now is time to learn this technique.

This is easy to do and learn, and it can make a huge difference to your images. It is an essential technique for Color or Grayscale photo images, a real fundamental. It is simply the way images are adjusted. It is quick to do, and it should become your automatic procedure.

You can do this during the scan, or after the scan in the photo editor. The scanner software is very important to our results, it is the tool we have to work with. You really don't need much skill to operate a printer or a monitor, but scanners do require extra effort. The technique described here used with good scanning software will raise your scanning skill level very considerably.

This article is illustrated using images of the histogram tool from Microtek ScanWizard, but if your scanner allows control of the tones during the scan, and many scanners do, then it has similar tools, and they will all work the same way.

Most popular photo editor programs today have similar histogram tools, for example Adobe Photoshop or Elements (shown below - at the Levels menu or just type Control L), and Corel Photo-Paint, Ulead PhotoImpact, and Corel Paint Shop Pro. These all work the same as described here. This tool is often named "Levels", referring to adjusting the black and white end point levels. The adjustment below lowered the midpoint, to brighten the image.



The first step is to start with a pretty good photograph, reasonably focused and exposed. Then the rest is easy. You can even make poor photos better, sometimes a lot better.

The image below is our final version. It's only a 256 color GIF file now, okay? GIF is not best for photos, but the transparent background requires it. And I like it, and it's a good example for the technique. There are a few steps involved in this Simple Way, and it's much harder to describe than to do, but I'll try to cover it all. This method works great for Color or Gray scanning modes, and if you edit images, I can't imagine you not finding it extremely useful too. This tool is fundamentally important to all imaging.




Below is the initial scan, with less contrast.



Photos do vary, one from another, and often do have different scanning requirements. Here is an easy nearly semi-automated technique that helps quite a lot (honest). And for the unusual photo, too dark, too light, etc, variations of this same method will work wonders. There are many opinions how to best do this, but this one works.

This article is illustrated using screen images from Microtek's ScanWizard, but if your scanner allows control of the tones during the scan, and it probably does, then it surely has very similar tools that work the same way. And good photo editors also have the same tool.
Thanks! =)

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HOW TO SET BRIGHTNESS OF THE SCREEN?


Hi,

Dear User...

You can adjust the brightness and contrast of your monitor to improve the readability of text and to make digital pictures appear more like they'll look when printed.

To improve the results when adjusting the brightness and contrast settings for your display, use Display Color Calibration. (Display Color Calibration helps you adjust these color settings and others.) For more information about calibrating your display color in Windows, see Calibrate your display.

The way you adjust brightness and contrast varies and depends on your specific display.

Brightness and contrast buttons on the front of the monitor. Some monitors have brightness and contrast controls on the front and use the standard symbols shown in the following image.


On-screen menu. You can change the brightness and contrast settings for some displays by using an on-screen menu, and then setting the brightness and contrast in the resulting menu. Many times, you can view the on-screen menu by pressing a button-possibly labeled Menu-on the front of the monitor.



Thanks....

Feb 07, 2013 | Computers & Internet

1 Answer

I can not find any contrast controls on my Toshiba Satellite A305. On the whole, the colors are dull and wash out. The brightness controls must be set at 100% for any moderately accepable image. But there is no way that I can find to adjust contrast or any other color adjustments that might improve color. Any help out there?


There isn't any contrast controls on TFT screens, it's color response depends on the maker of the panel.
If your PC has a Intel or NVidia graphic card, you can modify some color settings from the video driver like gamma or contrast. For NVidia cards, there is a setting called "Color Vibrance" or "Digital Vibrance", increase that.
On Intel cards, right click on the desktop, go to graphic properties, color correction.

Nov 04, 2009 | Toshiba Satellite A135-S4527 Notebook

1 Answer

I have a samsung hd crt that I bought in the US. I have it connected to my sky hd box but I will only show a 520 image and the image is offset. Why will not show a 720 image, without it being offset


Dear sir,

Here is the some settings for best view in Samsung HDTV
try this
Picture menu
Mode: Movie
Cell Light: 10
Contrast: 84
Brightness: 54
Sharpness: 0
Color: 54
Tint: G50/R50

Advanced settings submenu
Black tone: Off
Dynamic contrast: Off
Gamma: -1
Color space: Auto
Flesh tone: 0
Edge enhancement: Off
xvYCC: Off
Set the offset as per your requirement
White balance submenu
R-Offset: 24
G-Offset: 25
B-Offset: 25
R-Gain: 29
G-Gain: 20
B-Gain: 19

Picture options submenu
Color tone: Warm2
Size: Screen Fit
Digital NR: Off
HDMI black level: Normal [grayed out]
1080 Full HD Motion Demo: Off
Film mode: Auto1*
Blue only mode: Off

--Setup menu
Game Mode: Off
Energy saving: Off

i think it helped.
if you have any problem regarding this issue,leave a feedback we will glad to assist you


Have a nice day
good luck.

Sep 12, 2009 | Samsung Televison & Video

1 Answer

logiteck quickcam communicate


>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>- --> Troubleshooting: Image Quality for Cameras trnsp.gif Detailed Description This article covers some standard troubleshooting for issues such as fuzzy, grainy, out-of-focus or off-color camera images. trnsp.gif Answer The information in this article applies to the following software
QuickCam 9.x and below
ImageStudio 7.x and below
Many factors can affect the image quality of your pictures. If you are experiencing blurry images, please try adjusting the focus ring located around the lens. This will allow you to focus the camera image on objects at different distances. Also, make sure there is good lighting. Improving the lighting conditions can improve the image quality considerably.
Connection Issues:
If the image quality is poor while transmitting video over the Internet using video enabled programs such as MSN Messenger, Yahoo! or AOL Instant Messenger, your connection speed to the Internet directly affects the image quality of the transmitted video. Corporate LAN, DSL/cable modem connections will result in the best image quality experience, while dial-up connections may result in choppy and overall poor quality because of the slower connection speed. Even broadband connections such as DSL/cable modem may experience choppy video at times because of Internet traffic or slow upload speeds. If the image appears clearly in the camera software, most likely your Internet connection may be responsible for the poor image quality in your video program.
Changing Display Adapter Settings:
If you are still experiencing a distorted, fuzzy or grainy image, you may need to change the settings for your display adapter. For optimal image quality, please make sure the video display adapter is set to display at least 16-bit high color or higher. To change the color palette please perform the following steps:
  1. Click on "Start," "Settings," and "Control Panel."
  2. Double-click on the Display icon.
  3. Click on the tab labeled Settings.
  4. In the dialog box labeled Color Palette, verify the video mode is set to 16-bit (high color) or 24-bit (true color).
  5. Also, check with the manufacturer of the video card for updated video drivers.
Low Light Boost:
If you cannot do anything to improve the lighting situation, some Logitech video cameras have an option for "Low Light Boost." If there is an option for "Low Light Boost," try enabling the "Low Light Boost" in the QuickCam software. To do this:
  1. Open the QuickCam software.
  2. At the bottom right hand corner of the camera image box, click on the arrow next to the QuickCam icon.
  3. Choose "Advanced Camera Settings".
  4. Under the Image Enhancement box, place a check mark in the "Low Light Boost" option.
  5. If that does not improve the image quality, try adjusting the other image settings, such as contrast, saturation brightness, gain and white balance.
  6. Click OK when your are done.

Mar 05, 2008 | Logitech QuickCam Communicate STX Personal...

1 Answer

Edge Enhancement Option Disabled...


edge enhancement option i think would be enabled if you are in dynamic or movie mode. What it does is to enhance the contrast of the edges of 2 different colors.

I have the LA32S8, similar specs but only 7000:1 CONTRAST ratio. when playing dvd, i set it to movie mode. Settings vary on different tv and player. you can adjust first the backlight, then brightness then contrast, color and sharpness. the brightness you adjust by choosing the level that shows enough details on dark scenes. adjust if its too dark not to see the details of the scene. contrast, you can set by distiguishing vivid colors of the picture, dont put too much contrast as your picture would look flat. it should have a 3d look, same also with sharpness, you can experiment on the face of a person to show details on the edges.
color you set just enough to make it accurate on color reproduction.

My settings for movie are
contrast 92
brightness 49
sharpness 23
color 57
tint g48 r52
backlight 7
tone warm1
digital NR off
black adjust high
dynamic ocntrast high
gamma +2
edge enhancement on
color space auto

Oct 05, 2007 | Samsung LN-S3241D 32 in.LCD HDTV

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