Digital Camera Out-Focusing via Low-Pass Image Filtering
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Solution Overview
Problem
Conventional digital photographing apparatuses require knowledge of camera lenses for users to perform out-focusing, making it difficult for ordinary users to achieve this technique effectively.
Innovation Solution
A digital photographing apparatus that displays an image of a photograph region on a display panel, generates an image signal in response to shutter release button signals, and stores image data, with an out-focusing mode that low-pass filters image data of regions excluding the setting region, making the setting region clear and the remaining regions blurred.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional out-focusing technique is used, then the photographing technique can achieve clear setting region and blurred other regions, but it requires knowledge about camera lenses which ordinary users do not possess
Solution Approach 1:
The camera system performs out-focusing automatically without requiring user knowledge about camera lenses. The processor automatically determines the setting region and applies low-pass filtering to achieve the desired blur effect, making the system self-sufficient and eliminating the need for users to understand lens mechanics.
Solution Approach 2:
The patent replaces manual mechanical out-focusing operations with digital signal processing. Instead of requiring physical manipulation of lens elements, the system uses software-based low-pass filtering on image data to achieve the out-focusing effect, making it accessible to ordinary users.
2Manufacturing precision
If low-pass filtering is applied to image data of regions excluding setting region, then the setting region becomes clear and remaining regions become blurred, but the processing complexity increases
Solution Approach 1:
The patent divides the photograph region into a setting region and other regions. By segmenting the image data spatially, the system can apply different processing (low-pass filtering) only to the regions that need blurring, while keeping the setting region sharp. This segmentation approach achieves precise focus control without unnecessarily processing the entire image.
Solution Approach 2:
The patent applies local quality by applying low-pass filtering selectively only to regions excluding the setting region. Different parts of the image have different quality characteristics - the setting region maintains high detail while other regions receive blur processing. This localized processing achieves the desired focus effect with optimized computational resources.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables general users without knowledge of camera lenses to easily perform out-focusing by ensuring the setting region remains clear while the out-focusing regions become blurred, enhancing user accessibility.
Implementation Method 1
the processor low-pass filters image data of regions excluding a setting region in the photograph region
Data Source
AI summary
Provided is a method of controlling a digital photographing apparatus that displays an image of a photograph region on a display panel, generates an image signal of the photograph region in response to signals generated by a shutter release button, and stores image data of the image signal in a storage medium. In an out-focusing mode, the method includes amplifying the blurriness of an out-focusing region by low-pass-filtering image data of regions excluding a setting region within the photograph region.