imagetracerandroid

Simple raster image tracer and vectorizer written in Java for Android. See https://github.com/jankovicsandras/imagetracerjava for the desktop Java version.

by András Jankovics

This is the Android version of ImageTracer.java, please read that for more details: https://github.com/jankovicsandras/imagetracerjava

The library: src/jankovicsandras/imagetracerandroid/ImageTracerAndroid.java

Sample Activity: src/jankovicsandras/imagetracerapp/ImagetracerActivity.java

Android application: bin/ImageTracerApp.apk

The whole package is an Android project.

I will try to update this documentation as soon as I have enough time. :)

1.1.2

• minor bugfixes
• lookup based pathscan()

1.1.1

• Bugfix: CSS3 RGBA output in SVG was technically incorrect (however supported by major browsers), so this is changed. More info
• transparency support: alpha is not discarded now, it is given more weight in color quantization
• new options.roundcoords : rounding coordinates to a given decimal place. This can reduce SVG length significantly (>20%) with minor loss of precision.
• new options.desc : setting this to false will turn off path descriptions, reducing SVG length.
• new options.viewbox : setting this to true will use viewBox instead of exact width and height
• new options.colorsampling : color quantization will sample the colors now by default, can be turned off.
• new options.blurradius : setting this to 1..5 will preprocess the image with a selective Gaussian blur with options.blurdelta treshold. This can filter noise and improve quality.
• IndexedImage has width and height
• getsvgstring() needs now only IndexedImage (tracedata) and options as parameters
• colorquantization() needs now only imgd, palette and options as parameters
• background field is removed from the results of color quantization

Deterministic output

See options for deterministic tracing

Main Functions

|Function name|Arguments|Returns| |-------------|---------|-------| |imageToSVG|String filename, HashMap<String,Float> options /*can be null*/, byte [][] palette /*can be null*/|String /*SVG content*/| |imageToSVG|Bitmap bitmap, HashMap<String,Float> options /*can be null*/, byte [][] palette /*can be null*/|String /*SVG content*/| |imagedataToSVG|ImageData imgd, HashMap<String,Float> options /*can be null*/, byte [][] palette /*can be null*/|String /*SVG content*/| |imageToTracedata|String filename, HashMap<String,Float> options /*can be null*/, byte [][] palette /*can be null*/|IndexedImage /*read the source for details*/| |imageToTracedata|Bitmap bitmap, HashMap<String,Float> options /*can be null*/, byte [][] palette /*can be null*/|IndexedImage /*read the source for details*/| |imagedataToTracedata|ImageData imgd, HashMap<String,Float> options /*can be null*/, byte [][] palette /*can be null*/|IndexedImage /*read the source for details*/|

Helper Functions

|Function name|Arguments|Returns| |-------------|---------|-------| |saveString|String filename, String str|void| |loadImageData|String filename|ImageData /*read the source for details*/| |loadImageData|Bitmap bitmap|ImageData /*read the source for details*/|

ImageData is similar to ImageData here.

There are more functions for advanced users, read the source if you are interested. :)

Options

|Option name|Default value|Meaning| |-----------|-------------|-------| |ltres|1f|Error treshold for straight lines.| |qtres|1f|Error treshold for quadratic splines.| |pathomit|8f|Edge node paths shorter than this will be discarded for noise reduction.| |colorsampling|1f|Enable or disable color sampling. 1f is on, 0f is off.| |numberofcolors|16f|Number of colors to use on palette if pal object is not defined.| |mincolorratio|0.02f|Color quantization will randomize a color if fewer pixels than (total pixels*mincolorratio) has it.| |colorquantcycles|3f|Color quantization will be repeated this many times.| |blurradius|0f|Set this to 1f..5f for selective Gaussian blur preprocessing.| |blurdelta|20f|RGBA delta treshold for selective Gaussian blur preprocessing.| |scale|1f|Every coordinate will be multiplied with this, to scale the SVG.| |roundcoords|1f|rounding coordinates to a given decimal place. 1f means rounded to 1 decimal place like 7.3 ; 3f means rounded to 3 places, like 7.356| |viewbox|0f|Enable or disable SVG viewBox. 1f is on, 0f is off.| |desc|1f|Enable or disable SVG descriptions. 1f is on, 0f is off.| |lcpr|0f|Straight line control point radius, if this is greater than zero, small circles will be drawn in the SVG. Do not use this for big/complex images.| |qcpr|0f|Quadratic spline control point radius, if this is greater than zero, small circles and lines will be drawn in the SVG. Do not use this for big/complex images.|

Process overview

See Process overview and Ideas for improvement

License

The Unlicense / PUBLIC DOMAIN

This is free and unencumbered software released into the public domain.

Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a compiled binary, for any purpose, commercial or non-commercial, and by any means.

In jurisdictions that recognize copyright laws, the author or authors of this software dedicate any and all copyright interest in the software to the public domain. We make this dedication for the benefit of the public at large and to the detriment of our heirs and successors. We intend this dedication to be an overt act of relinquishment in perpetuity of all present and future rights to this software under copyright law.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

For more information, please refer to http://unlicense.org