What is it?
The color features for the HP Color LaserJet 4700 and 4730mfp are very similar to those found on previous HP Color LaserJet products. The CLJ4700 and CLJ4730mfp do introduce a few new features “Color Themes”, “HP Digital Imaging” and “Services”, previous color LaserJet products did not include. The following information covers all the features for the PCL and Postscript driver. The screen shots show both the PCL6 and Postscript drivers. Some of the features are specific to either the PCL6 or Postscript and are indicated in those sections.
Note: topics that contain an (*) have related white papers that provide additional information for that feature.
New Driver Features
HP Digital Imaging
Color Tab Options
Color Themes – RGB Color
Default (sRGB) – the standard sRGB input color space. The rendering intend used as default is more along the lines of Vivid/Presentation.
*Image Optimization (sRGB) – sRGB input space that uses a Photographic/Perceptual rendering intent.
*Adobe RGB (1998) – input color space based on the Adobe RGB (1998) which is a bit larger than the sRGB input color space
None - the new name for what once was called the 'device' or 'NoAdjust' selection. It should be used for workflows where color-management has been implemented upstream. This is not a direct path but does provide the least amount of color manipulation by the printer.
*Custom Profile – the default custom color table that ships with the device is based on the HP Color LaserJet 4650. This is used for emulation purposes. Users can download a RFU (Remote Firmware Upgrade) color table file that will overwrite the default color table. Additional RFU color tables may be found at hp.com as they become available.
NOTE: Input color spaces are used to describe the characteristics of the color coming into the device. They are used as the source color space table to convert colors to a larger independent color space which is then used to convert to device CMYK.
Color Themes – CMYK Color (Postscript driver only)
* Default CMYK+ – the HP proprietary CMYK input color space that has been optimized to take advantage of the full device color gamut. This table intelligently maps colors for greater saturation while optimizing skin tones and memory colors.
SWOP – input color space that emulates the North American offset press standard.
Euroscale – input color space that emulates the European offset press standard.
DIC - input color space that emulates the Japanese offset press standard.
* Custom Profile – the default custom color table that ships with the device is based on the HP Color LaserJet 4650. This is used for emulation purposes. Users can download a RFU (Remote Firmware Upgrade) color table file that will overwrite the default color table. Additional RFU color tables may be found at hp.com as they become available.
Color Options and Manual Settings
Edge Control determines how edges are rendered. Edge Control consists of three components:
Adaptive Halftoning, Trapping, and Color-REt. Adaptive Halftoning increases the edge sharpness. Trapping reduces the effect of color plane misregistration by slightly overlapping the edges of adjacent objects. Color-REt increases the apparent resolution by placing each dot for the smoothest edges.
Off – The Off setting turns Trapping, Adaptive Halftoning, and Color-REt to Off.
Light – The Light setting provides minimal trapping. Adaptive Halftoning is set to On and Color-REt is set to On.
Normal – The Normal setting provides the default trapping settings. Adaptive Halftoning is set to On, and Color-REt is set to On.
Maximum – The Maximum setting provides the most trapping. Adaptive Halftoning is set to On, and Color-REt is set to On.
Text, Graphics, Photographs – Known as object tagging. The printer driver and firmware can differentiate between these types of objects and apply independent Neutral Gray and Halftone attributes to each object type.
Black Only – maps neutral gray image elements for the object selected so they print using black (K) only toner. Images elements will be printed neutral gray without any color shift.
4-Color - maps neutral gray image elements for the object selected so they print using equal parts of all four color toners CMYK. Gray areas may exhibit a slight color tint but grays will usually appear smoother and more pleasing.
Halftone screen frequency is applied based on the adaptive halftone selections in General Edge Control.
Smooth – Approximately 155 lines per inch
The Smooth selection is useful for images that contain large areas of medium tones with little or no detail. Smooth may reduce the appearance of bands, streaks and other noisy artifacts.
Detail - Approximately 190 to 212 lines per inch.
The Detail selection is useful for images that have predominantly fine detail in the image area. The higher line screen frequency may allow fine detail to be printed with better apparent sharpness.
Paper/Quality Tab Options
*HP Digital Imaging (PCL6 driver only)
By employing a number of image enhancement algorithms, the HP Color LaserJet 4700/4730mfp PCL 6 print driver is designed to automatically render images to deliver optimum print quality. The driver also enables the manual adjustment of image enhancement parameters. This allows users to alter printed images without image editing software and without altering the original image file.
Contrast Enhancement (ACE) - Contrast Enhancement increases image contrast for a more visually pleasing result. This filter is useful with flat images (images in which much of the image content is compressed into a small dynamic range of pixel values). Flat images may result from low lighting or environmental haze or from camera or scanner limitations.
Digital Flash (LACE) - Digital Flash adjusts lighting levels to reveal areas in shadow. The filter locates dark areas in an image and brings out detail without degrading other features in the image.
Sharpness (FRE) - Many images are improved by increasing their sharpness. Sharpness locates edge detail and makes it more prominent. The filter detects regions that contain significant variations in pixel value along a number of different vectors (which denotes edges) and then applies a filter to subtly bring out detail.
SmartFocus (ResSyn) - SmartFocus increases the apparent resolution of lower resolution images. Many images downloaded from the Internet or from digital cameras may be compressed due to size restrictions and may exhibit pixilation artifacts when printed. SmartFocus upscales the image to the printer resolution without accentuating these artifacts.
Smoothing (FRE) - Just as many images benefit from increased sharpness, many images are improved by smoothing, which decreases noise artifacts often created by digital cameras or scanners. The filter locates areas that contain abrupt changes in pixel value in comparison to surrounding pixels, which denotes noise, and then applies a filter to smooth the output.
Internet Services – The Internet Services group box contains the Select a destination drop-down menu with the following
If you have Internet access, select any of these items and click Go! to open the corresponding HP Web page.
Click the Device and Supplies status icon to open the Device Status screen of the HP EWS. For more information, see HP Embedded Web Server user guide.
You will find additional in-depth information on advanced driver feature for the HP Color LaserJet 4700 and 4730mfp in the following documents.
Print Driver Image Enhancements
sing HP Color Samples for RGB and CMYK
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