dmc-cross-stitch

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dmc-cross-stitch

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Converts a PNG image into the color palette of the DMC floss threads

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// repository documentation

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# Mosaic Designer
This software takes an image and translates that into a schematic of a mosaic.
It supports different materials, such as [Perler Beads](http://www.perler.com/),
[LEGO](http://www.lego.com/), and [DMC cross-stitching](http://www.dmc-usa.com/)

The algorithm maps colors in the input image to the available colors, while
generally preserving the feel of the image (aka [dither](https://en.wikipedia.org/wiki/Dither)).

See [examples/fighter.png.html](an example) for what the output looks like.

## Usage
Run this look with an image file as an input:

java -jar xsticher.jar myimage.png

It produces the schematic in `myimage.png.html`

## Options
### Selecting materials (-p)
Select materials. The following values are supported:

* `-p dmc-floss`: DMC size 25 cotton embroidery floss. This is the default.
* `-p lego`: LEGO mosaic. As of this writing, the color palette is not complete.
* `-p lego-mono`: Monochrome LEGO mosaic that only consists of white, black, and 3 shades of grey in between.
* `-p perler`: Perler beads.

More can be added by placing a CSV file into `src/main/resources`

## Excluding specific colors (-e)
When this program color-maps the input image, all the colors available in the given material is weighed
equally, and the program may end up selecting a color that is either expensive or of limited supply.

When this happens, you can use the `-e` option to exclude specific colors from the consideration of the algorithm.
The algorithm will find the next best match color.

Values are comma separated color codes. For example, `-e B5200` would exclude a variant of white. Color codes can be
seen in the output schematic.

## Remapping specific colors (-2e)
When your input image contains a lot of natural colors and gradations, the output will often contain
a large number of similar colors. This adds the complexity to the design, and sometimes you prefer to
reduce the # of colors used in the schematic.

The `-2e` option does this. You specify comma separated color codes, and those designated colors
will be remapped to another color that's already used in the schematic. And this is the key difference
between the `-2e` option and the `-e` option; the former replaces the specified color by another color that's already used
in the current design, while the latter replaces the specified color by another color available in the material.

## (-tk)
Use a block dither algorithm, which tends to produce a block pattern in the output like the following:

![block dither](https://upload.wikimedia.org/wikipedia/commons/e/ef/Michelangelo%27s_David_-_Bayer.png)

This tend to work well when creating a large mosaic with materials of limited color options, such as LEGO.

## (-ctk)
Combine block dither algorithm (see above) with the default "nearest color" algorithm by
applying them selectively to different regions of the same image.

This option takes another image as an argument and use that as the mask pattern like this: `-ctk mask.png`

The mask image should have transparent pixels and opaque pixels, and should be of the same size as
the main image. The part of the main image specified by opaque colors in the mask image will receive
the block dither algorithm, while others get the "nearest color" algorithm.

I wrote this mode to deal with video game graphics images that have clear border pixels. I wanted
those to be mapped to one color to get a crisp line, while getting a good color match in other areas
through the block dither algorithm.

## Selecting dither block size (-b)
Block dither algorithm acts on a block of pixels at a time (2x2, 3x3, 4x4, ...)
This algorithm selects the block size. For example, `-b 2` would select 2x2 block.

Larger block size spreads colors among larger number of pixels, which is normally not practical for sizes of
hand-assembled mosaic projects. I almost always use 2x2.

## Selecting region of the image to process (-area)
By default, the entire image gets processed, but you can select the specific rectangle to process with the `-area` option.
This option takes the `-area WxH+X+Y` form:

* W: width of the rectangle
* H: height of the rectangle
* X: X offset of the rectangle
* Y: Y offset of the rectangle

## Tile fill mode (-tileFill)
Some materials, such as LEGO, comes in pieces of different sizes. When doing a large mosaic, it is easier
and cost-effective to use bigger tiles of various sizes, not just 1x1. This switch enables use of tiles.

_This feature is still a work in progress and most notably it currently does not offer the control of tile sizes_

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