Digital Signal Processor Concurrent Live View and Image Processing
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Solution Overview
Problem
Conventional digital image processing apparatuses have limitations in live-view operation speed due to overlapping periods in data conversion and display, resulting in a maximum continuous photographing speed of approximately 1.43 images per second, as the data converter's cycle of 33 ms restricts efficient processing and conversion of frame data.
Innovation Solution
A digital signal processor that processes photograph-image data during the time remaining after completing the processing of one frame data, allowing the data converter to convert photograph-image data concurrently with the next frame data, thereby reducing the overall processing time and increasing the speed of continuous photographing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the data converter processes photograph-image data sequentially after live-view processing, then the conversion quality is maintained, but the processing time increases and continuous photographing speed decreases
Solution Approach 1:
The patent applies preliminary action by converting photograph-image data during the live-view processing periods (N+1th and N+2th frames) before the actual photographing operation. This allows the data converter to prepare and convert the photograph-image data in advance, so that when photographing occurs, the conversion is already partially complete or can be completed during the subsequent live-view processing cycles, thereby reducing the total processing time and increasing continuous photographing speed while maintaining conversion quality.
2Stability of the object's composition
If the data converter operates with a fixed 33ms cycle for live-view processing, then the display timing is maintained, but the photographing speed is limited to 1.43 images per second
Solution Approach 1:
The patent applies continuity of useful action by making the data converter continuously process photograph-image data during the live-view processing periods (N+1th and N+2th frames) rather than waiting for a separate conversion phase. This continuous utilization of the data converter's processing capability during otherwise idle periods extends the effective processing window, allowing photographs to be captured at a faster rate (up to 2 images per second) while maintaining the 33ms display timing cycle for live-view operation.
3Measurement precision
If the resolution of photograph-image data is increased to maintain image quality, then the conversion time increases to 200ms, but the continuous photographing speed remains limited
Solution Approach 1:
The patent applies preliminary action by initiating the conversion of photograph-image data during the live-view processing periods (N+1th and N+2th frames) before the photographing operation completes. This allows high-resolution photograph-image data to be converted in advance during periods when the data converter would otherwise be idle, so that the full conversion time (200ms) can be utilized effectively without delaying the next photographing operation, thereby maintaining both image quality and continuous photographing speed.
Data Source
AI summary
A digital signal processor and a digital image processing apparatus adopting the same. The digital signal processor comprises a data converter, which converts digital image data in red, green, and blue form to digital image data in luminance and chrominance form, such that when photograph-image data is captured by photographing, the data converter processes the photograph-image data during each period of time from the time when processing of one frame data of live-view is completed to the time when processing of next frame data begins.