........Questions and Answers



Frequently Asked Questions

1. Why we need Calibration in VisualDot?

Dot sharpness is controllable parameter. However, it is very sensitive on the proof output.
People are expecting as hard (sharp) dots as possible on inkjet proof too, just like the same look with press.
However, if we making the dots sharper at very higher level, unexpected moire can come up or smooth shades
can appear with steps in it.
We improved dot-generation algorithm for each color screen now. Furthermore, new version is providing more structured process to get the best sharpness by controlling sharpness of each color screen differently. To find the best optimized (as sharp dots as possible without any Moire problem), it is highly recommended to proceed Calibration process. It is important to calibrate your Dot-proofing environment before creating Dot-proof
output. Each different Rip software and Color Management Workflow has its own characteristics and parameters which make effect on quality on Dot-proof and Press output.

Currently VisualDot¡¯s default sharpness is optimized to EPSON4000+TOPAZ RIP software.
It is required to find the best optimized condition of sharpness control of your own dot-proofing environment,
Because the environment varies due to different rip software¡¯s, proofers, papers and original 1 bit TIFF images.
Please find Colorchart.PDF or Colorchart.PS file which is located installation folder of VisualDot (e.g. .../Programfiles/codelsystems/visualdot/...).

Load the Colorchart image with your own PS Rip software and create 1 bit TIFF images by parameters like resolution, line per inch, screen type, screen ruling and etc. as the same with those are going to be used for final
press output and dot-proofing. After creation of 1 bit TIFF images, open those with VisualDot software.
Now it is required to calibrate the "Sharpness of Dots" as the maximum sharpness without unexpected moire effect. Generally too vivid (clear or sharp) Dots can cause unexpected Moire effect on the proof output.

To find the optimal level of sharpness, VisualDot supports "Sharpness Control of Each Color Plate" as the below image. Go to "Make file for Proofing" and create dot-proof image for the first time. Print it with your proofer printer
and check if there's any moire effect at any position of C, M, Y, or K. If you see unexpected moire in C, this means
the Dot Sharpness of Cyan screen is too sharp in a certain condition and you need to set the level of C sharpness at lower position. If you cannot see any moire in K, this means you may have more room to increase the sharpness of K screen by adjusting the level at higher position. With this kind of trials and errors, you'll be
able to find the optimal sharpness level for each color screen to get the best dot-proof output with maximum sharpness later.

2. How can I enable Automatic recognition of 1 bit TIFF file names, especially for Spots

There's very convenient way of multiple file loading. By defining naming rules of your own for your TIFF files, you can load TIFF files set at once, with automatic color plate placement. This is very important for automatic process using DotBatch program. For sorting of files, the list can be sorted by "TIFF JOB name", "TIFF FILE name" or "RAS files".
With selection of TIFF JOB name, files will be sorted by internal job name with color information.
With selection of TIFF FILE name, files will be sorted by physical file name and it is required to build a customized naming rules to import each separate file as a composite at once. To add and edit your own naming rules for importing TIFF files, press 'TIFF File Type...¡® button in the File Browser dialog window and define your own naming rules.
To define a naming rule of TIFF FILE NAME for Spot color plates, it is recommended to use <Color> rather than <C>, because a single alphabet cannot stand for a specific spot color. If each color separated files are named by rules registered in 'TIFF file type' setting, you can easily select combined set of files by activating 'Compose page' option.

The original list of TIFF files will be simplified into the right window where sets of TIFF files will appear by combining TIFF files with the defined naming rules. Select a single set of TIFF files and press 'OK' to load the TIFF file set. Placing into the each color plate will be done automatically.

3 How many SPOT colors can I use and save in the library?

New version 1.5 supports importing up to 4 SPOT colors for a single composite image. This will be extended into 12 spot colors very soon, to meet very professional users in the field.

In the Spot Color Library of new version, basic Pantone color index is available as default. When any of your 1 BIT TIFF images are using Spot Color which is not available in Pantone index, you need to define the customized RGB value of the Spot Color here in advance. Spot colors can be added as many as you want in the library.

Users can add/modify/delete spot colors in the library without limitation. You can create as many spot colors as possible if you need. However, please remember that the name of Spot Color is very important for automatic recognition of each color-separate screens.

4. What kind of Dot-proof output format can I generate?

Proof image file format can be selected between 32 bit composite TIFF, 8 bit separate TIFF, PDF and PS formats. Resolution of proof image can be determined between 300, 360, 600 and 720 DPI.
720 DPI resolution is recommended for Epson printers and 600 DPI resolution is recommended for HP and Canon printers. During creation of proof image you can select compression type as None, Packbit or LZW.
Image quality can be also adjusted in the slide bar controller. With moving the slide to the left, screen dots will be generated more clearly for each color screen. Too vivid (clear or sharp) Dots can cause unexpected Moire effect on the proof output. You're advised to calibrate the environment of Dot-proofing first to get the maximum sharpness of the output before dot-proofing.

When creating proof output image in 8 bit Separate TIFF format, TIFF images for each color plate will be generated as 8 bit data. This can help your enhanced color management in your own color proofing software.
The names of separate TIFF files will be like below;
JOBNAME(Black).TIFF, JOBNAME(Spotcolor1).TIFF, JOBNAME(Spotcolor2).TIFF and etc.

5. Would you be more specific for MIMO ENVIRONMENT, I mean Server features?

Visual DotBatch is Automatic processingmodule for prompt Dot-proofing workflow without manpower.
DotBatch monitors multiple Hotfolders for file input and automatically convert separated 1 bit TIFF files into 32 bit
composite or 8 bit separate Dot-proof file and Preview image file and those files can be saved into different folders specified.
Parameters including Spot colors, Resolution, File format, mirroring and other settings can be differently
defined to each hotfolder to generate Dot-proof file and Preview file as expected in various options automatically under the differently defined output folders.

6. VisualDot is using another Rip software, so the screen of the Rip will spoil the Dots.

That¡¯s not true.
Without regarding the Rip software, the proofer machine is also using error diffusion dithering patterns.
However, the screen is applied to the image when there¡¯s a change of size (down-sampling or up-sampling).
If you create the Dot-proof image and rip/print the image at the same resolution, you need not worry about the problem.

7. Positive points in common

We found that our partners and customers generally agree with the listed positive points of VisualDot.
- Speed is impressive
- Hot-folder mode is very useful, especially for multiple input and multiple output with each different settings
- Interface for soft dot-proofing like zooming, panning and other analysis tools is user-friendly
- The structure is very flexible (compatible with any kind of 3rd party solutions)
- Quality is very impressive through structured calibration process


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