Image Processing Luminance Conversion for Encoding-Accurate Highlights
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image processing systems fail to appropriately consider tone characteristics and encoding methods, leading to incorrect processing results, such as incorrect highlight warnings in images.
Innovation Solution
An image processing apparatus and method that adjusts luminance values based on maximum luminance values (maxDRL) and encoding methods, converting data to a common numerical range for accurate processing, including highlight warning and histogram display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If luminance-based processing is applied to image data without considering encoding methods, then processing speed is improved, but processing accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by detecting the encoding method of image data before performing luminance-based processing. The processing execution unit determines whether the image data is encoded in video range or full range encoding, and prepares appropriate processing parameters in advance. This ensures that the correct processing method is applied from the beginning, avoiding the need for trial-and-error adjustments and ensuring accurate highlight warning display while maintaining efficient processing.
2Measurement precision
If encoding method conversion is performed to ensure accurate processing, then processing accuracy is improved, but device complexity increases
Solution Approach 1:
The patent introduces an intermediary component - the processing execution unit - that acts as a mediator between the image data and the processing algorithms. This unit detects the encoding method and selectively applies appropriate processing parameters without requiring actual conversion of the encoded data. By using this intermediary layer, the system achieves accurate processing while avoiding the complexity of implementing full encoding conversion functionality.
Data Source
AI summary
An image processing apparatus acquires image data and first information relating to a maximum luminance value of an output dynamic range of the image data. The apparatus then applies, to the image data, processing in which a luminance value of the image data and a first value based on the first information are used. In a case in which the image data is encoded in a first numerical range and the first information is encoded in a second numerical range that is different from the first numerical range, the apparatus applies the processing to the image data after converting the image data, the first information, or the first value so that the image data and the first value have values if the image data and the first value would have been encoded in a same numerical range.