Logarithmic Histogram Display for Intuitive Exposure Adjustment
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Solution Overview
Problem
Existing digital camera systems face challenges in intuitively adjusting exposure conditions due to the difficulty in interpreting histogram graphs with linear scales, which makes it hard to determine correct exposure and required adjustments, especially when the same object is imaged under different exposure settings.
Innovation Solution
An image quality display apparatus and method that prepares data for displaying a histogram with a logarithmic scale before a request is made, allowing for faster response times and reduced storage capacity, while also displaying the image and histogram together on one screen to facilitate intuitive exposure adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a histogram with a linear scale is used to display frequency distribution of shading levels, then the display format is simple and straightforward, but it becomes difficult to intuitively adjust exposure conditions and determine correct exposure
Solution Approach 1:
The patent changes the display parameter from a linear scale to a logarithmic scale for the histogram section axis. This parameter change transforms the histogram display to match the logarithmic nature of exposure values (EV), enabling users to intuitively understand exposure conditions and make accurate adjustments while maintaining the simplicity of histogram display format
2Loss of time
If data for displaying the histogram is prepared after a display request is accepted, then the storage capacity is reduced, but the response time until the histogram is displayed increases
Solution Approach 1:
The patent applies preliminary action by preparing the histogram display data in advance, before the display request is accepted. The tallying means tallies the frequency distribution data during image processing or storage, so when the user requests histogram display, the data is already prepared and can be displayed immediately, thus reducing response time while minimizing additional storage requirements
Data Source
AI summary
An image quality display apparatus includes an input means for inputting images, an operating means for accepting a request for display of a graph showing a frequency distribution of shading levels of an image inputted by the input means, a display means for displaying the graph in response to the display request, and a tallying means for preparing data for displaying the graph before accepting the display request.