Pixel Row Column Alternation for Image Scaling
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Solution Overview
Problem
Existing image scaling methods often result in the removal or distortion of fine or small features, leading to unsatisfactory image quality, particularly during registration and scaling processes.
Innovation Solution
The method involves generating new rows or columns by alternating data values from adjacent pixels, allowing for the insertion or removal of rows/columns to change image size without eliminating entire features, thereby preserving the integrity of fine text and line art.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional image scaling methods are used, then image size is changed, but fine or small features are removed or distorted
Solution Approach 1:
The patent segments the image into individual pixel rows and columns, processing each dimension independently through alternating removal/insertion operations. This segmentation allows precise control over which pixels are removed or inserted, preserving fine features while achieving the desired scale factor.
Solution Approach 2:
The patent changes the parameter of pixel arrangement by alternating the removal or insertion of rows and columns based on the scale factor. This parameter change enables the system to maintain image quality by strategically selecting which pixels to remove or insert, rather than uniformly scaling all pixels.
2Productivity
If entire rows or columns are removed during scaling, then image size is reduced, but image quality deteriorates due to loss of fine details
Solution Approach 1:
The patent applies local quality by treating different rows and columns differently based on their position and the scale factor. Instead of uniformly removing entire rows or columns, the system selectively removes or inserts individual pixels based on alternating patterns, preserving local image quality while achieving overall scaling.
3Measurement precision
If conventional scaling is used to increase image size, then resolution is improved, but artifacts are introduced
Solution Approach 1:
The patent uses copying by inserting duplicate rows or columns based on the alternating pattern. When increasing image size, the system copies existing pixel data and inserts it in an alternating sequence, which preserves the original image quality while achieving the desired resolution increase without introducing interpolation artifacts.
Data Source
AI summary
An image has pixels arranged in perpendicular rows/columns. The size of the image is changed to produce a changed-size image and the changed-size image is output. The process of changing the size of the image adds at least one row/column as at least one inserted row/column. The inserted row/column is made up of data from generating adjacent rows/columns of the perpendicular rows/columns. Embodiments that reduce the size of the image remove the generating adjacent rows/columns that were used to form the inserted row/column and, in such reduction processing the inserted row/column is added where the (now removed) generating adjacent rows/columns were previously positioned. In embodiments that increase the size of the image, instead of removing the generating adjacent rows/columns, the inserted row/column is merely inserted between the adjacent rows/columns.