Image Capturing Device Tone Mapping Color Gamut Conversion
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Solution Overview
Problem
Existing image processing methods face challenges in efficiently converting high definition images to standard definition images without causing incorrect color display or consuming significant computing resources, especially in real-time applications like live broadcasts and video conferences.
Innovation Solution
An image capturing device equipped with tone mapping, color correction, and color gamut mapping circuits that perform brightness adjustment and color gamut narrowing operations on high definition images to produce standard definition images with improved color performance, reducing the need for additional hardware and software processing on destination devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high definition image data is directly output without processing, then image quality is maintained, but data amount and computing power requirements increase significantly
Solution Approach 1:
The patent extracts only the essential visual information from high definition images by performing tone mapping to adjust brightness distribution and color gamut mapping to convert wide color gamut to standard color gamut. This extraction process removes redundant data while preserving perceptually important visual characteristics, thereby reducing data amount while maintaining acceptable image quality.
2Measurement precision
If high definition image is processed by software on computer device, then color display accuracy is improved, but hardware requirements and computing power consumption increase
Solution Approach 1:
The patent performs tone mapping and color gamut mapping operations in advance within the image capturing device itself, before the image data reaches the computer device. This preliminary processing converts the high definition image with wide color gamut into a standard definition image with standard color gamut, so that subsequent display on ordinary devices can show accurate colors without requiring additional hardware or software processing power.
3Quantity of substance
If high definition image is converted to standard definition by directly discarding bits, then data amount is reduced, but color display becomes incorrect and loses chroma
Solution Approach 1:
The patent changes the parameters of the image data through systematic processing: it adjusts the brightness distribution through tone mapping to compress the dynamic range, and transforms the color space through color gamut mapping to convert from wide color gamut to standard color gamut. These parameter changes ensure that the converted standard definition image maintains correct color relationships and acceptable chroma, avoiding the color distortion and gray appearance that result from simple bit discarding.
4Productivity
If high definition image processing is performed in real-time, then application responsiveness is improved, but computing power requirements increase
Solution Approach 1:
The patent segments the image processing task into distinct functional modules: tone mapping circuit for brightness adjustment and color gamut mapping circuit for color space conversion. This segmentation allows each module to be optimized independently and processed in a streamlined pipeline, enabling real-time processing of high definition images to standard definition without requiring excessive computing power, as each segment handles a specific aspect of the conversion efficiently.
Data Source
AI summary
The disclosure provides an image capturing device and an image capturing method. The image capturing device includes a tone mapping circuit, a color correction circuit, and a color gamut mapping circuit. The tone mapping circuit obtains a first image including a first pixel and performs a tone mapping operation to obtain a brightness adjustment parameter, where the first pixel includes a plurality of first color channels. The color correction circuit converts the first color channels into a plurality of second color channels based on the brightness adjustment parameter and the brightness of the first pixel. The color gamut mapping circuit performs a color gamut mapping operation on the second color channels to convert the second color channels into a plurality of third color channels, and outputs a second image, where the second image includes the second pixel characterized by the third color channels.