Wednesday, November 15, 2017
ID cards - Dither Photoshop-compatible plugin
Dither
Photoshop-compatible plugin
EXAMPLES
DESCRIPTION
Dithers a continous tone image to 1-bit black and white line art. Three dithering algorithms are offered including an algorithm developed by former Apple software developer and now nature photographer Bill Atkinson. Despite beeing coarser his algorithm produces much better looking results by default.
I want to thank Mr. Atkinson who passed the algorithm on to John Balestrieri (see HyperDither below) and Mr. Balestrieri for sharing the information.
I want to thank Mr. Atkinson who passed the algorithm on to John Balestrieri (see HyperDither below) and Mr. Balestrieri for sharing the information.
SCREENSHOT
PRICING
PLATFORM
Tested with WINDOWS XP and WINDOWS 7 - 64 bit
For other Windows versions please test yourself using the demo version below!
For other Windows versions please test yourself using the demo version below!
COMPATIBILITY
Tested with Photoshop 6, 7, CS, CS2, CS3 and CS5.1.
For other versions please test yourself!
A monitor resolution of at least 1024 x 768 pixels is required.
Does not work with Adobe Photoshop (64 bit).
For other versions please test yourself!
A monitor resolution of at least 1024 x 768 pixels is required.
Does not work with Adobe Photoshop (64 bit).
PLEASE TEST YOURSELF
Please try out the demo below before ordering to make shure that the plugin works well with your Photoshop and Windows version.
SUPPORTED IMAGE MODES
8 bit, RGB, Grayscale
DOWNLOAD
(Right-click the link and choose "Save")
FREE VERSION
ditherfree.8bf
This free version has a smaller preview, no image enhancement controls, no color options and no "blend with original" modes.
This free version has a smaller preview, no image enhancement controls, no color options and no "blend with original" modes.
DEMO VERSION
PRINT SAMPLE
ditherexample.png
Print this example on your desktop laser printer.
Print this example on your desktop laser printer.
INSTALLATION
- Close Photoshop if its running
- Navigate to the Photoshop application folder into a subfolder named Plug-Ins (i.e. Zusatzmodule in German).
- To keep things organized create a meaningful named subfolder in the Plug-Ins folder. Move the downloaded file into this newly-created folder.
- In Photoshop use Filter > Martin Koch line art > Dither to run the plugin.
UNINSTALL
- Navigate to the Photoshop application folder into a subfolder named Plug-Ins (i.e. Zusatzmodule in German).
- Find and delete the ditherdemo.8bf file.
RELEASE NOTES
Version 1.0 released on July 19, 2007
BACKGROUND
FLOYD-STEINBERG ALGORITHM
X 7/16 3/16 5/16 1/16
The gray value of every pixel (X) is compared to 50% gray and either set to black or white. The entire error (pixel value minus pixel value after applying the threshold) is distributed to the neighbor pixels as shown (7/16+3/16+5/16+1/16=1). As the image is processed from left to right and from top to bottom the threshold is applied to already altered pixels and the error is distributed again and again.
BILL ATKINSON ALGORITHM
X 1/8 1/8 1/8 1/8 1/8 1/8
Only three quarters of the error are equally distributed to six neighbor pixels as shown.
RANDOM DITHER
Every pixels is compared to an individual, randomly determined threshold level. Gray values below the threshold level become black, values above become white.
Download - Core Image Unit implementing the HyperScan (first used in the Thunderscan software) dithering algorithm invented by Bill Atkinson. It is a stochastic halftone filter, basically a modified Floyd-Steinberg halftone. This project is a GPU implementation using Apple's Core Image framework
| File | Summary + Labels | Uploaded | Size |
|---|---|---|---|
| HyperScanDitherTest.qtz | QuartzComposer test rig Featured Testing OpSys-OSX | Dec 29, 2007 | 125.64KB |
ID CARDS - Convert an image, increasing apparent color resolution by dithering
dither
Convert an image, increasing apparent color resolution by dithering
Syntax
Class Support
The input image (
Algorithm
http://radio.feld.cvut.cz/matlab/toolbox/images/dither.html
Convert an image, increasing apparent color resolution by dithering
Syntax
X = dither(RGB,map) BW = dither(I)Description
X = dither(RGB,map) creates an indexed image approximation of the RGB image in the array RGB by dithering the colors in colormap map.X = dither(RGB,map,Qm,Qe) creates an indexed image from RGB, specifying the parameters Qm and Qe. Qm specifies the number of quantization bits to use along each color axis for the inverse color map, and Qespecifies the number of quantization bits to use for the color space error calculations. If Qe < Qm, dithering cannot be performed and an undithered indexed image is returned in X. If you omit these parameters, dither uses the default values Qm = 5, Qe = 8.BW = dither(I) converts the intensity image in the matrix I to the binary (black and white) image BW by dithering.Class Support
The input image (
RGB or I) can be of class uint8, uint16, or double. All other input arguments must be of class double. The output image (X or BW) is of class uint8 if it is a binary image or if it is an indexed image with 256 or fewer colors; otherwise its class is double.Algorithm
dither increases the apparent color resolution of an image by applying Floyd-Steinberg's error diffusion dither algorithm.http://radio.feld.cvut.cz/matlab/toolbox/images/dither.html
Reverse Transfer ID Card Printing Reverse transfer ID card printing is a high-quality print process that functions by first transferring ink from a YMCK dye film onto a clear film. Once it contains all the ink, the clear film is then laminated onto the ID card. By placing the YMCK dye film onto a clear film instead of directly onto the surface of the ID card, true edge-to-edge printing with deeper color saturation and better resolution than the dye-sublimation process is possible. In order to make reverse transfer printed ID cards more durable, an additional overlaminate layer can be added to the card for greater protection against scratches or other forms of wear and tear damage. Many organizations place a holographic feature onto the overlaminate in order to add greater visual security to their ID cards. For the highest level of security a custom holographic ID card overlaminate can be designed and applied to ID cards.
Direct-to-Card Printing Direct-to-card ID card printing, also known as dye-sublimation or dye-diffusion ID card printing is the most common method used to print images directly onto ID card surfaces. With direct-to-card printing the ID card printer transfers color directly to a blank ID card by heating a special ribbon beneath the thermal printhead. The heat from the printhead causes the ink in the ribbon to vaporize into a gas, which then diffuses into the surface of the ID card, where it solidifies, or sublimates, into a solid, resulting in a durable color pigmentation on the white surface of the ID card, that resists scratching and fading. Since the ID card printer can only lay down one color at a time, the dye-sublimation process is repeated for each YMCK panel until a complete, colored image is formed on the ID card. As a final step, the printer prints an overcoat (O) panel over the entire ID card surface, protecting the card from UV and physical damages. Certain brands of ID card printers can also print a secure watermark onto the surface of ID cards during this step in the ID card printing process.
We do not have time or money, for their udge investement on money printing....Electrostatic Printing Process Electrostatic printing is a printing technique done without any plate, ink or type form. The paper is coated with a thin layer of zinc oxide, making it an insulator in the dark and simultaneously a conductor of electricity when exposed to light. Process Electrostatic printing use a positively charged toner/inks that is attracted to paper which in turn is negatively charged. The paper is moved through a digital ink bath; positively charged particles in ink stick to the negative charge on the paper
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