Image correction device and blocking method of mapping diagram for image correction device

TW202640524AActive Publication Date: 2026-10-01SIGMASTAR TECH LTD
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Patent Information

Application Number
TW114112223
Authority / Receiving Office
TW · TW
Patent Type
Applications
Current Assignee / Owner
Filing Date
2025-03-28
Publication Date
2026-10-01
Estimated Expiration
2045-03-27

AI Technical Summary

Technical Problem

Wide-angle lenses capture distorted images due to their inherent characteristics, and existing Lens Distortion Correction (LDC) devices with fixed processing power struggle to efficiently correct these distortions using a system-on-a-chip (SoC) architecture.

Method used

An image correction device that dynamically adjusts the number of mapping rows in a mapping slice based on the image's distortion, utilizing a direct memory access circuit and control circuit to read and process image blocks with a binary search algorithm, optimizing memory usage and correction efficiency.

Benefits of technology

The solution allows for efficient utilization of internal memory capacity and accelerates image correction processing by dynamically adjusting the number of mapping rows, improving correction speed and efficiency.

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Abstract

A blocking method of a mapping diagram is provided to correct an input image based on the mapping diagram to generate an output image. The mapping diagram records a corresponding position of each target pixel of the output image in the input image. The blocking method includes: reading a first mapping section from the mapping diagram, wherein the first mapping section includes a first number of mapping rows; if the target input image block cannot be found in the input image based on the first mapping section, reading a second mapping section from the mapping diagram to find out the target input image block from the input image based on the second mapping section, wherein the second mapping section includes a second number of mapping rows, and the second and the first mapping section start from the same mapping row; the second number is an integer greater than or equal to
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