Digital Camera Lens Preview System for Replaceable Lenses
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Solution Overview
Problem
Users of replaceable-lens digital cameras face difficulties in determining the appropriate lens for specific photographing conditions, leading to unnecessary lens changes, especially for inexperienced photographers.
Innovation Solution
A digital photographing apparatus and method that allows users to preview the effects of a new lens through a preview screen before physically replacing the current lens, by generating and processing image signals based on the selected lens's specification information, which can be stored, read, or downloaded from external sources, enabling digital zoom and aperture adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a user physically replaces lenses to find the appropriate one for current photographing conditions, then the user can obtain different image effects, but the user experiences unnecessary lens changes and time loss, especially for inexperienced photographers
Solution Approach 1:
The patent creates a virtual copy of the lens selection process by generating a preview image that simulates how the current scene would appear with different lenses. Instead of physically replacing lenses to see their effects, the system processes the captured image through various lens effect algorithms to create virtual previews, allowing users to compare lens characteristics without physical changes.
Solution Approach 2:
The system performs preliminary lens effect evaluation before the user commits to a lens change. By generating preview images with different lens characteristics (wide-angle, telephoto, fisheye, etc.) in advance, users can make informed decisions about which lens to use, eliminating the trial-and-error process of physically swapping lenses.
2Adaptability or versatility
If a user has multiple lenses to choose from, then the user can find the appropriate lens for specific conditions, but the user faces difficulty in determining which lens is most appropriate
Solution Approach 1:
The system provides immediate visual feedback by displaying preview images that show the actual effect of different lenses on the current scene. Users can see how wide-angle, telephoto, or other lens types would capture their specific photographing scenario, making the selection process intuitive and based on direct visual comparison rather than theoretical knowledge.
Solution Approach 2:
The patent adds a visual dimension to lens selection by transforming the abstract concept of lens characteristics into concrete visual previews. Instead of relying on users to understand technical specifications or imagine lens effects, the system renders actual preview images showing field of view, distortion, and other optical characteristics for each lens type.
3Loss of information
If the system generates preview images for multiple lens types, then the user can preview lens effects before replacement, but the system requires processing and displaying multiple image variants
Solution Approach 1:
The system extracts only the essential lens characteristics needed for preview generation, separating the core lens effect processing from the base image capture. By identifying and applying only the relevant optical transformations (field of view adjustment, distortion correction, focal length simulation), the system generates accurate lens previews without requiring complex full-physics simulations of each lens type.
Data Source
AI summary
A Digital photographing apparatus having a replaceable lens mounted thereon, a method of controlling the digital photographing apparatus, and a recording medium having recorded thereon a program for executing the method are provided. The digital photographing apparatus includes an imaging device generating an image signal by imaging light through the mounted lens, a user interface receiving a selection of a user of one of a plurality of replaceable lenses, a reading unit reading specification information regarding the selected lens, a changing unit changing the image signal based on the read specification information regarding the selected lens, and a display unit displaying the changed image signal as a preview image.