Image Processing Control for Projected and Real-Space Color Matching
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Solution Overview
Problem
The challenge in movie photographing systems is that the RGB values of images projected on a screen and objects in real space often differ due to differing spectral characteristics, leading to a lack of realism in combined images.
Innovation Solution
An information processing device converts images using conversion information based on RGB values of projected and real-space objects, aligning hues through display and imaging conversion processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the same camera photographs both the projected image and the real object, then the photographing process is simple, but the RGB values of the re-photographed image and captured image differ due to spectral characteristics
Solution Approach 1:
The patent introduces conversion information as an intermediary element that mediates between the projected image and the real object. This conversion information includes conversion coefficients that transform RGB values from the projected image domain to the real object domain, enabling alignment of spectral characteristics without requiring separate photographing processes
Solution Approach 2:
The patent changes the parameter representation by introducing conversion coefficients that map RGB values between different domains. By adjusting these conversion parameters based on spectral characteristics of both the projected image and real object, the system achieves RGB value alignment while maintaining operational simplicity
2Measurement precision
If xy color coordinates are adjusted to be the same, then color matching is improved, but RGB values still differ due to spectral characteristics
Solution Approach 1:
The patent extends parameter transformation from xy color coordinates to RGB values by introducing conversion coefficients specific to RGB domain. This allows direct alignment of RGB values while accounting for spectral characteristics, overcoming the limitation of xy coordinate matching alone
Solution Approach 2:
The patent replaces the mechanical adjustment of color coordinates with a computational transformation system using conversion coefficients. This substitution enables precise RGB value alignment through mathematical conversion rather than physical adjustment, addressing the spectral characteristic differences
3Manufacturing precision
If conversion information is calculated using RGB values from photographing the projected image and real object, then RGB value alignment is achieved, but additional photographing processes are required
Solution Approach 1:
The patent performs preliminary measurement of spectral characteristics for both the projected image and real object before the main photographing process. This preliminary action enables pre-calculation of conversion coefficients, which are then applied during the actual photographing process to achieve RGB value alignment without adding significant complexity
Solution Approach 2:
The system uses the photographing device itself to capture both the projected image and real object for conversion information calculation. By making the photographing device serve dual purposes (both measurement and final photographing), the patent avoids introducing separate complex measurement systems while still achieving precise RGB alignment
Data Source
AI summary
An information processing device (100) includes a control unit (130). The control unit (130) converts, based on first conversion information, a first image photographed by a first imaging device (300A) in a first space into a display image to be displayed on a display device (200) disposed in a second space. The control unit (130) acquires a second image photographed by a second imaging device (300B) to include the display device (200) that displays the display image. The first conversion information is calculated based on an RGB value of a first color image obtained by photographing an image having a predetermined color displayed on the display device (200) with the second imaging device (300B) and an RGB value of a second color image obtained by photographing an object having a predetermined color disposed in the second space with the second imaging device (300B).