HP Designjet T1100ps A0 User Manual

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Method defines the basic image enhancement to apply to the scanned image. It 
depends on the printer installed, but may have one of the following values: 
 
Continuous tone:  
used when the image has many colors and transitions among them. 
This method is used in the “Color Photo” type of original. 
 
 
Graphics:  
used for images where lines and edges should be sharp. Used in 
“Map” and “CAD” types of original. 
 
 
Mixed:  
used when the original contains both text and pictures. Used in the 
“Brochure” type of original. 
 
 
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This setting is used to increase or decrease the lightness of the image. It can be used to 
compensate for dull or faded originals. 
 
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When positive, this setting increases the colors’ saturation (i.e. colors become more 
vivid); when negative, it makes the image duller (grayer). It can be used to compensate 
for faded originals. 
 
 
 
 
Saturation - 6 Saturation 0Saturation + 6 
 
						

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This setting is used to adjust the color balance for the whole image. If you find that the 
overall image has a color cast (e.g. it is too green) then you may correct it by modifying 
the color balance. You may set the Color balance value to RGB (Red, Green and Blue) 
or CMY (Cyan, Magenta and Yellow), depending on the selection made in the “Setup 
tab > Options button > General button > Color Balance”. 
 
                  
 
 
 
Please note that same results can be obtained using either RGB or CMY. The following 
table explains the relationship between the variations of such colors: 
 
Setting positive value results in a … image negative value results in a … image 
Red Redder “Cyaner”, turquoise 
Green Greener “Magenter”, pinker 
Blue Bluer Yellower 
Cyan “Cyaner”, turquoise Redder 
Magenta Magenter, pinker Greener 
Yellow Yellower Bluer 
  
As you can see, the same effect (e.g. having a redder image) may be achieved by 
increasing the Red value (in RGB mode) or by decreasing the Cyan value (in CMY 
mode). In addition, increasing (or decreasing) the value of one color has the same 
effect as decreasing (or increasing) the values of the two remaining colors of the same 
 
						

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set. For example, to make the image bluer you may increase the Blue value or decrease 
both the Red and Green values. 
 
The entity of the color change differs depending on the direction you are heading. In 
other words, when moving towards positive values in RGB mode the appearance of the 
image changes slightly, whilst when moving towards negative values, the image 
exhibits a much bigger change. In CMY mode, it is the opposite: moving towards 
positive values produces greater changes than moving towards negative values. 
 
This behavior is shown in the table above where the Cyan, Magenta and Yellow boxes 
are more saturated (i.e. stronger) than the Red, Green and Blue boxes. This does not 
exclude the possibility of having slight increases in the amount of Cyan, Magenta and 
Yellow. These are achieved through the usage of the complementary colors: for 
example to produce a slight increase of Yellow, you will need to modify Red and Green 
(in RGB) or Cyan and Magenta (in CMY). 
 
It is advisable to use only one system (either RGB or CMY) and not to mix them. If in 
doubt about which system to choose, you should consider that RGB is, in most cases, 
more intuitive. The following table is a guideline to the correct actions required to obtain 
the desired color balance: 
 
Color Balance Needs: Should move to … values Should move to … values 
Increase in Strength in 
change Red Green Blue Cyan Magenta Yellow
Hard  - -   + + Red Soft +     -     
Hard   -    + Yellow Soft + +    -  -   
Hard -  - +   + Green Soft  +     -   
Hard -    +     Cyan Soft  + +   - - 
Hard - -   + +  Blue Soft   +    - 
Hard  -     +  Magenta Soft +  + -    - 
 
Please remember that Orange and Brown lie between Red and Yellow, and Violet is 
between Magenta and Blue.  
 
 
 
						

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The following picture shows the effects of increasing the RGB values of an image: 
 
 
 
+R +G
+R
+R +B
+B
+G +B 
+G
 
						

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This setting is used to blacken all areas below the defined lightness level. It is employed 
to enhance the text parts of a document, when black text is copied as gray. Valid 
values range from 0 to 255. If 0 is selected, the image is not modified; if 255 is 
selected the whole image will be black. 
 
 
 
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This setting is used to whiten all areas above the defined lightness level. Valid values 
range from 0 to 255. If 0 is selected the image is not modified; if 255 is selected the 
whole image will be white. 
 
 
 
 
 
 
 
 
						

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This setting is used to sharpen the image. It enhances the edges between areas of 
different colors, thus resulting in better-defined text and edges. The strength of the 
sharpening is controlled by its value. 
 
 
 
   
 
 
 
 
 
 
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This setting is used to smooth the image. It is useful when the scanned original is “noisy” 
(i.e. color disturbance, graininess and non-area uniformity). 
 
 
 
 
 
 
 
 
 
 
 
 
						

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Although blurring is the opposite of sharpening, they do not cancel each other out. In 
fact, the two options can be usefully combined to blur away noise in the image first and 
then sharpen the result. Observe below the same example as before, with blur and 
sharpening applied. Note that now there is no “augmented noise” in the text area, 
compared with the result when only sharpening was applied. 
 
 
 
 
 
 
 
 
 
 
3.5 Effects of changing default media profile settings (b&w) 
 
The settings that can be modified and their possible values are described in the 
following sections. 
 
 
						

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Method defines the basic image enhancement to apply to the scanned image. It 
depends on the printer installed, but may have one of the following values: 
 
Graytone: 
used for pictorial images (pictures with many gray shades). 
 
B&W Threshold: 
used for pure B&W clear CAD drawings and/or text only 
documents, where the background is pure white and the text or 
lines are well defined. It only distinguishes two elements, black 
and white, and they are defined depending on a threshold 
value (which is the user-specified lightness value described in 
section 3.5.2). There will be no gray levels in the output.  
Normal: 
used when the original contains both text/CAD lines and 
pictures/graphics. 
 
Photo: 
this method exists for historical reasons and was designed for 
pictures; however, better results are obtained with Graytone 
and there is no predefined type of original that uses this 
method.  
Adaptive:  
used for CAD or text documents where the background is 
barely distinguishable from the lines or characters, where, for 
example, the original is a blueprint or an old and worn out 
document. This method is similar to Normal but extracts the 
background gray level from the input image. 
  
 
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This setting increases or decreases the lightness of the image. It can be used to 
compensate for dull or faded originals. 
 
 
						

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This setting is used to sharpen the image; it enhances the edges between areas of 
different colors (see the explanation in section 3.4.7). 
 
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B B
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This setting is used to smooth the image. It is useful when the scanned original is “noisy” 
(see the explanation in section 3.4.8). 
 
All comments made in section 3.4.8 regarding the combined use of sharpening and 
blurring apply here as well. 
 
 
						

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4. GLOSSARY 
 
Background cleaning 
Image enhancement feature that whitens all areas above a 
defined lightness level. Typically used to avoid noise, 
stains or wear marks. 
Black enhancement 
Image enhancement feature that blackens all areas below 
a defined lightness level. Typically used to enhance text. 
Black ink only 
A print settings option that forces the printer to use only 
black ink. It is useful to avoid a color cast in the printed 
output which is produced by the use of composite black 
made from mixing colored inks. 
Blueprint 
A white print on a blue background, especially used for 
copying maps, mechanical drawings and architects’ 
plans. 
Blur 
Image enhancement feature that makes the image softer 
and less sharp. 
CAD drawing 
Computed Aided Design technical drawing: mechanical, 
electrical/electronic, architectural.  
Color balance 
Adjustment of the ratio of Red, Green and Blue (or Cyan, 
Magenta and Yellow) components, which aims at 
producing a copy free from any unwanted color cast or 
color bias. 
Color calibration (CLC) 
Closed-Loop Color. The process of bringing the color 
printer system to standard operating conditions. 
Color management The process of controlling colors to obtain what is 
expected from a color reproduction device. 
Copying 
Reproducing an original image onto a substrate. 
Enhance gray 
Converts pale colors in a color image to gray. 
Gray balance ramp 
Sequence of gray patches, ranging from very light (white) 
to very dark (black) shades, in a constant decrease of 
lightness. 
Hue Attribute of color that determines whether it is red, yellow, 
green, blue, or some combination of pairs of these (e.g. 
an orange can be 30% red and 70% yellow). 
Image enhancement 
Any process which aims at improving the appearance of 
an image. This can be done using filtering, transformation 
or “threshold” techniques, such as edge enhancement, 
blurring, sharpening or blunt masking. 
Inkjet printer 
A type of printer that shoots fast-drying drops of ink 
through tiny nozzles to create an image on paper or other 
material. 
Lightness 
The attribute of visual perception in accordance with 
which an area appears to emit or reflect more or less light.