Inkjet Recording Position Adjustment Chart Detection
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Solution Overview
Problem
Conventional image processing methods for adjusting recording positions in inkjet recording apparatuses face challenges in accurately detecting pattern positions due to deviations in chart installation, optical distortions, and manufacturing inaccuracies, leading to increased processing time.
Innovation Solution
An image processing apparatus and method that records a recording position adjustment chart with a pattern and a mark, detects the chart's position and inclination, and determines adjustment values based on the detected pattern position without creating abstract patterns, enabling fast and accurate pattern position detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If abstract patterns are created by extracting feature amounts from detected images to detect pattern positions, then pattern position detection accuracy is improved, but processing time is increased
Solution Approach 1:
The patent extracts only the necessary mark portion from the adjustment chart to detect chart position and inclination, rather than processing the entire chart or creating comprehensive abstract patterns. This selective extraction reduces calculation time while obtaining sufficient information for accurate pattern position detection through coordinate transformation.
Solution Approach 2:
The patent performs preliminary detection of chart position and inclination using marks before detecting pattern positions. By establishing the chart's spatial orientation in advance, the system can directly calculate pattern positions without requiring time-consuming abstract pattern creation and matching processes.
2Measurement precision
If conventional pattern position detection methods are used to account for chart installation deviation and optical distortion, then detection accuracy is improved, but device complexity is increased
Solution Approach 1:
The patent uses marks with specific geometric parameters (position, shape) to detect chart position and inclination. By changing the detection approach from analyzing entire pattern structures to measuring mark parameters, the system achieves accurate compensation for installation deviation and optical distortion with simpler processing.
Solution Approach 2:
The patent introduces marks as intermediary elements between the chart and the detection system. These marks serve as reference points that mediate the detection process, enabling accurate determination of chart position and inclination without requiring complex analysis of the entire chart structure or pattern arrays.
3Measurement precision
If feature amount extraction and abstract pattern creation are performed from both detected image and reference image, then pattern position detection accuracy is improved, but calculation time is increased
Solution Approach 1:
The patent extracts only essential information (mark position and inclination) from the detected image, rather than creating comprehensive abstract patterns from entire images. This selective extraction maintains detection accuracy by capturing the necessary spatial relationships while dramatically reducing calculation time and processing requirements.
Data Source
AI summary
An image processing apparatus includes a recording control unit for recording, by a recording head, a recording position adjustment chart including a pattern for adjusting a recording position of the recording head discharging ink and a mark formed in a position different from that of the pattern, a reading unit for reading the recording position adjustment chart as image data, a first detection unit for detecting a position and inclination of the recording position adjustment chart when reading the recording position adjustment chart based on the mark, a second detection unit for detecting the position of the pattern based on the position and the inclination detected by the first detection unit, and a determination unit for determining adjustment values for the recording position adjustment based on the image data of the recording position adjustment chart in which the position of the pattern has been detected by the second detection unit.