Trapezoid Motion Blur Pointer for Graphic Meter Displays
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Solution Overview
Problem
Conventional graphic meter displays experience increased image processing load when displaying motion blur images, particularly due to the complexity of calculating sector-shaped motion blur and gradation, which can lead to inefficiencies and a sense of incompatibility during rapid pointer movement.
Innovation Solution
A graphic meter display that generates a motion blur pointer image as a trapezoid when the rotation speed exceeds a specific threshold, with uniform brightness and an inverted relationship to the rotation speed, and ensures non-overlapping drawing ranges with the previous frame, reducing image processing load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sector-shaped motion blur pointer image is generated by sweeping from the pointer image at the last frame to the pointer image at the present frame, then a realistic motion blur effect is achieved, but the image processing load increases due to calculating sector figure and gradation
Solution Approach 1:
The motion blur pointer image is segmented into two distinct parts: a triangular afterimage representing the previous frame's pointer position, and a trapezoidal motion blur image representing the movement trajectory. This segmentation allows each part to be processed independently with simpler algorithms, reducing the overall processing complexity while maintaining visual realism.
Solution Approach 2:
Instead of generating motion blur by sweeping from the first frame to the present frame (forward approach), the invention inverts the approach by first displaying the afterimage of the previous frame and then overlaying the trapezoidal motion blur image. This inverted sequence simplifies the processing by separating the afterimage handling from the motion blur calculation.
2Reliability
If multiple pointer images are overlapped from the pointer image at the last frame to the pointer image at the present frame, then motion blur is achieved, but the image processing load increases due to drawing many images
Solution Approach 1:
The invention extracts only the essential visual information needed for motion blur representation, discarding the need to process and display multiple intermediate pointer images. By extracting the key elements (afterimage position and motion trajectory), the system achieves motion blur effect with minimal image processing operations.
Solution Approach 2:
Instead of displaying all intermediate pointer positions during the rotation (excessive action), the invention uses a partial approach by displaying only the afterimage of the previous frame combined with a trapezoidal representation of the motion path. This partial action is sufficient to create the perception of motion blur without the computational burden of processing multiple images.
3Reliability
If gradation is applied to make the motion blur image gradually thinner toward the tip of the pointer, then realistic motion expression is achieved, but the image processing load increases
Solution Approach 1:
The invention applies local quality by making the triangular afterimage uniformly bright without gradation, while the trapezoidal motion blur image uses simple brightness adjustment based on rotation speed. This selective application of uniform brightness to the afterimage and simplified brightness control to the motion blur region maintains realistic motion expression while avoiding the computational complexity of gradient calculations across the entire pointer image.
Data Source
AI summary
A trapezoid-shaped motion blur pointer image is composed of edges of normal pointer images. The normal pointer image and the motion blur pointer image are not overlapped with each other to prevent unevenness in brightness. The brightness of the motion blur pointer image is even in a whole area of the motion blur pointer image. The brightness of the motion blur pointer image has an inverted relationship with an area thereof, or is varied corresponding to a rotation speed of the pointer image.