RIP Resolution Adjustment for Inkjet Image Processing
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Solution Overview
Problem
Conventional image processing methods for inkjet recording devices require high-resolution raster data processing, leading to inefficient RIP processing and excessive data handling, especially when the printing paper can only support limited ink drop gradations, resulting in unnecessary data processing burdens.
Innovation Solution
An image processing method and apparatus that adjusts the RIP process resolution based on the number of ink drops supported by the printing paper, performing oversampling to generate output image data with a smaller resolution, thereby optimizing data processing efficiency by only handling the required data for image representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high-resolution raster data (e.g., 900×900 dpi) is generated through RIP process, then the smoothing effect and image quality are improved, but the data processing time and computational burden increase significantly
Solution Approach 1:
The patent applies partial action by generating only the necessary resolution of raster data required for the specific printing task. Instead of always generating high-resolution (900×900 dpi) raster data, the system generates raster data at resolutions appropriate for the output requirements (e.g., 600×600 dpi or lower for papers supporting only 5-7 gradations), thereby reducing unnecessary computational burden while maintaining adequate image quality.
Solution Approach 2:
The patent changes the resolution parameter of raster data based on the ink drop gradation capabilities of the printing paper. By adjusting the raster data resolution parameter to match the paper's gradation support (5-7 gradations vs. 8 gradations), the system optimizes the balance between image quality and processing efficiency, avoiding the time-consuming generation of excessively high-resolution data when not needed.
2Measurement precision
If high-resolution raster data is generated, then the density representation capability is improved, but the data volume and processing complexity increase
Solution Approach 1:
The patent generates only the partial amount of data necessary for representing the density levels that the printing paper can actually support. For papers supporting 5-7 gradations, the system generates raster data with corresponding resolution and density levels, rather than generating full 8-gradation high-resolution data, thereby reducing data volume while maintaining adequate density representation capability.
Solution Approach 2:
The patent extracts and processes only the essential data components needed for the specific printing task. By identifying and removing unnecessary high-resolution data elements that exceed the paper's gradation capabilities, the system reduces data volume and processing complexity while retaining the critical density representation information required for quality output.
3Manufacturing precision
If the RIP process is performed at high resolution, then the oversampling smoothing effect is enhanced, but the edge irregularity problem persists for papers with limited gradation support
Solution Approach 1:
The patent changes the raster data resolution parameter to match the ink drop gradation capabilities of the printing paper. For papers supporting 5-7 gradations, the system uses appropriately lower resolutions that still provide sufficient smoothing effect through oversampling, rather than always using high resolutions. This optimization maintains adequate edge smoothness while significantly improving processing efficiency.
Solution Approach 2:
The patent applies partial oversampling action by generating raster data at resolutions that provide just enough smoothing effect for the paper's capabilities. Instead of always applying excessive high-resolution oversampling, the system uses the minimum necessary resolution to achieve acceptable edge smoothness, thereby improving productivity without sacrificing essential image quality.
Data Source
AI summary
An image processing method in which a RIP process is performed on original image data to obtain raster data with a first resolution, and a smoothing process is performed through oversampling the obtained raster data to generate output image data with a second resolution which is smaller than the first resolution. The method is performed for recording an image on a recording medium by an inkjet recording device that performs the recording by discharging an ink drop on the recording medium from an inkjet head based on the output image data. Here, the first resolution in the RIP process for performing the smoothing process on the raster data is determined according to information that indicates the number of gradations corresponding to the number of ink drops selected in advance and the second resolution.