Tone Curve Adjustment for Linear Image Signal Visualization
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Solution Overview
Problem
Existing systems face difficulties in understanding how output image signals change with gamma curve adjustments, making it challenging to achieve the desired tone intended by operators.
Innovation Solution
An image processing system with a setting value determination unit, tone adjustment unit, and image signal output unit that applies a tone curve characteristic to a linear image signal, allowing for nonlinear processing and output of an image signal reflecting the intended tone, with optional gamma correction or OETF processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If gamma curve adjustment is performed for tone correction, then tone adjustment capability is improved, but it becomes difficult to understand how the output image signal changes
Solution Approach 1:
The patent introduces an intermediary visual display that shows the relationship between input and output signal levels. This intermediary representation (graphical interface) mediates between the invisible signal processing and the user's perception, allowing users to see how tone curve adjustments affect the output image signal without directly observing the raw signal changes.
2Manufacturing precision
If complex signal processing is performed to achieve desired tone, then tone quality is improved, but operation complexity increases
Solution Approach 1:
The patent creates a visual copy or representation of the tone curve characteristics in a graphical interface. Instead of requiring users to understand complex signal processing parameters, the system displays a simplified visual copy of the curve that can be directly manipulated, maintaining tone quality while simplifying the operation to intuitive graphical interactions.
Data Source
AI summary
An object is to facilitate tone adjustment. For this object, an image processing system according to the present technology includes: a setting value determination unit that determines a setting value of a tone curve characteristic to be applied to a linear image signal having a linear characteristic according to an operation of a user; a tone adjustment unit that applies the tone curve characteristic based on the determined setting value to the linear image signal; and an image signal output unit that outputs, as an output image signal, an image signal after tone curve application obtained by application of the tone curve characteristic to the linear image signal. This configuration facilitates tone adjustment.