Embroidery Data Creation Apparatus for Image Representation
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Solution Overview
Problem
Conventional embroidery methods using blind stitches often result in a blurred impression due to discrepancies between reference lines and image centerlines, leading to poor representation of black pixels in the embroidery result.
Innovation Solution
An embroidery data creation apparatus that divides images into regions and calculates a reference swing position and maximum swing width for each region based on pixel color values, allowing for precise control of zigzag stitches to improve image representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If straight stitches are performed along horizontal centerlines of divided regions with zigzag stitches for deep color portions, then the embroidery process can be simplified and completed efficiently, but the reference lines may not align with image centerlines causing a blurred impression
Solution Approach 1:
The patent makes the reference lines dynamic by allowing them to deviate from straight horizontal lines. The reference line calculation unit computes reference lines that dynamically adjust their position and shape to pass through the center of gravity of black pixel clusters, rather than following fixed predetermined paths. This dynamic adjustment enables the reference lines to align accurately with actual image features while maintaining the overall blind stitch embroidery structure.
2Device complexity
If predetermined straight reference lines are used for blind stitch embroidery, then the embroidery data creation process is simplified, but the reference lines cannot adapt to varying image features resulting in poor representation of black pixels
Solution Approach 1:
The patent applies local quality by making each reference line segment adapt to local image characteristics. Instead of using a uniform straight reference line across the entire divided region, the system calculates reference lines that locally adjust to pass through the center of gravity of black pixel clusters in each specific area. This allows the reference lines to have different positions and orientations in different local regions, improving black pixel representation while keeping the overall process relatively simple.
Solution Approach 2:
The system changes the parameters of reference lines from fixed straight lines to variable curves that pass through calculated center of gravity points. By changing the geometric parameters (position, orientation, curvature) of reference lines based on image content, the system achieves better alignment with black pixel clusters without requiring completely complex algorithms.
Data Source
AI summary
An embroidery data creation apparatus for creating embroidery data required to sew embroidery that represents an image with a zigzag stitch, including an image storage device that stores the image made up of pixels each having a color value, a division device that divides the image into divided regions, each of which is a predetermined region through which one zigzag stitch passes through, a calculation device that calculates a reference swing position which provides a reference for swinging the zigzag stitch passing through each of the divided regions and a maximum value of a swing width of the zigzag stitch for each of the divided regions, based on the color values of the pixels in each of the divided regions; and an embroidery data creation device that creates the embroidery data based on the reference swing position and the maximum value of the swing width which are calculated.