Application development: Halftone effect with DXF output (Vector halftone filter for grayscale images)
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Description
Experience Level: Intermediate
The job is the creation of an application which will do the following:
- Allow input of a grayscale jpg\\bmp file
- Sample the jpg\\bmp image to produce a halftone effect equivalent to the photoshop halftone filter (dots of varying sizes on regular grid, dot size dependant on source image darkness from pixels around each sampled dot point).
- Output of a raster\\bitmap version of the halftone effect is not required.
- Output must be in dxf format, with each halftone dot existing in the dxf file as a \'CIRCLE\' object (defined by circle centre point and circle radius for each dot).
- Options must allow for varying maximum pixel size for halftone effect (dot spacing) and angle of halftone dot grid.
- No graphical interface is required.
- The application should be standalone ideally, although a filter that ran through photoshop or illustrator would be acceptable.
Attached DXF and jpg files give a typical example of what is required - base image and dxf file (note, pattern does not match exactly and is illustrative only). DXF file was produced by tracing bmp image in CAD program in this case.
- Allow input of a grayscale jpg\\bmp file
- Sample the jpg\\bmp image to produce a halftone effect equivalent to the photoshop halftone filter (dots of varying sizes on regular grid, dot size dependant on source image darkness from pixels around each sampled dot point).
- Output of a raster\\bitmap version of the halftone effect is not required.
- Output must be in dxf format, with each halftone dot existing in the dxf file as a \'CIRCLE\' object (defined by circle centre point and circle radius for each dot).
- Options must allow for varying maximum pixel size for halftone effect (dot spacing) and angle of halftone dot grid.
- No graphical interface is required.
- The application should be standalone ideally, although a filter that ran through photoshop or illustrator would be acceptable.
Attached DXF and jpg files give a typical example of what is required - base image and dxf file (note, pattern does not match exactly and is illustrative only). DXF file was produced by tracing bmp image in CAD program in this case.
James T.
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Last project
9 Nov 2010
United Kingdom
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