Provisional Image Rendering for Pen Stroke Alignment

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Solution Overview

Problem

In remote meetings, there is a delay in reflecting pen strokes on shared screens due to processing delays, and existing techniques fail to align the appearance of provisional images with final pen stroke images, especially when considering pen tip attributes and restricting drawing within appropriate regions.

Innovation Solution

An image processing method where the local-side apparatus generates a provisional image using an advanced drawing process that considers pen tip attributes, and transmits this image to the remote-side apparatus for composition within the specified drawing region, reducing delay and ensuring accurate alignment and region adherence.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the local-side apparatus performs simple display processing for provisional images, then the processing speed is fast, but the appearance of the provisional image does not match the final pen stroke image

Engineering Contradiction:

Improveprocessing speedVSAvoidappearance alignment

Core Design Contradiction:

SpeedVSManufacturing precision

Solution Approach 1:

The patent changes the processing parameters by applying the same rendering process settings (pen tip attributes, drawing characteristics) to both the provisional image generation and the final pen stroke image generation, ensuring appearance consistency while maintaining performance

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent performs preliminary rendering of the provisional image using the same drawing process as the final image, preparing the appearance characteristics in advance to match the final output

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If the local-side apparatus allows free drawing on the entire screen, then the drawing responsiveness is high, but the pen stroke may appear in inappropriate regions such as menu bars

Engineering Contradiction:

Improvedrawing responsivenessVSAvoiddrawing region accuracy

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent applies different drawing permissions to different regions of the screen by overlaying the streaming video (with menu bars and other UI elements) on top of the provisional image, restricting drawing to appropriate regions while maintaining responsiveness

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20230326103A1Image drawing method

Publication Date: 2023.10.12 WACOM CO LTD

AI summary

An image drawing method performed by first and second computers is provided. The image drawing method includes: transmitting, by the second computer, a streaming video that includes a pen stroke image generated by a first rendering process; generating, by the first computer, a pen stroke image by performing a second rendering process, which is shared with the first rendering process, in parallel with the first rendering process; receiving, by the first computer, the streaming video from the second computer via communication that incurs a delay; compositing, by the first computer, the pen stroke image into the streaming video; and outputting, by the first computer, the streaming video. The image drawing method enables alignment of appearances between a provisional image and the pen stroke image that appears within the streaming video.