Image Correction Circuit with Luminance Histogram Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional image correction process circuits in electronic devices, such as cameras, face challenges in applying suitable image correction processes to foggy or misty input images, leading to increased power consumption and cost due to the need for enhanced processing capabilities and additional encoder ICs for analog video conversion.
Innovation Solution
An image correction process circuit that includes a calculation portion for obtaining luminance histograms and a correction control portion to determine necessary image correction processes based on average luminance and standard deviation values, optimizing the correction amount and process control, and an integrated semiconductor device with an encoder circuit for digital-to-analog conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional image correction process circuits are used to process foggy or misty input images, then image correction can be applied, but power consumption increases and cost increases due to the need for enhanced processing capabilities and additional encoder ICs
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting correction amounts based on calculated luminance histogram statistics (average luminance value and standard deviation). The correction control portion modifies correction parameters according to the degree of foggy or misty conditions detected through these statistical parameters, enabling efficient image correction without requiring excessive processing power for all possible scenarios.
Solution Approach 2:
The system implements dynamics by making the image correction process adaptive rather than static. The correction control portion continuously monitors the luminance histogram statistics and dynamically adjusts correction parameters in real-time based on the actual image conditions, allowing the system to optimize power consumption by applying stronger correction only when needed.
2Reliability
If conventional image correction process circuits are used to process foggy or misty input images, then image correction can be applied, but device cost increases due to the need for enhanced processing capabilities and additional encoder ICs
Solution Approach 1:
The patent applies universality by designing an image correction process circuit that can handle multiple image conditions (foggy, misty, and normal conditions) using a unified approach. The correction control portion uses the same luminance histogram analysis mechanism for all correction types, eliminating the need for separate dedicated circuits for different correction scenarios and reducing overall device complexity.
Solution Approach 2:
The system merges the functions of scene determination and correction amount determination into a single integrated control portion. By combining these functions and using a unified luminance histogram analysis approach, the patent eliminates the need for separate encoder ICs and reduces device complexity while maintaining effective image correction capabilities.
3Reliability
If scene determination is performed by dividing the input image into multiple areas and calculating luminance histograms for each area, then suitable correction can be applied, but processing time and computational load increase
Solution Approach 1:
The patent applies segmentation by dividing the input image into multiple areas and calculating luminance histograms for each area independently. This segmentation allows the system to identify different scene conditions (foggy, misty, normal) in different regions and apply appropriate correction locally, improving scene determination accuracy while managing processing time through parallel computation of histogram statistics.
Data Source
AI summary
The image correction processing device (100) disclosed in the description is configured by integrating a first external terminal (CAMDI) [7:0] to which digital input image data is inputted from outside of the device, an image correction processing circuit (200) applying predetermined image correction processing on the digital input image to create digital output image data, a second external terminal (CAMDO) [7:0] outputting the digital output image data to the outside of the device, an encoder circuit (300) converting the digital output image data to analog composite video-type output image data, and a third external terminal (VOUT) outputting the analog composite video-type data to the outside of the device.