Pixel Matrix Background Updating for Surrounded Presence Pixels
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Solution Overview
Problem
Existing methods for updating background information of pixel matrices in presence sensors fail to effectively update when pixels indicating presence are completely surrounded by adjacent pixels also indicating presence, leading to incomplete updating and reduced sensor sensitivity.
Innovation Solution
A method that iteratively updates background information by averaging temperature values of adjacent pixels not indicating presence and previously updated pixels, ensuring all pixels in the matrix are processed, regardless of their spatial arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the background information is updated using only adjacent pixels not indicating presence, then the updating method is simple, but the updating fails when pixels indicating presence are completely surrounded by adjacent pixels also indicating presence
Solution Approach 1:
The method performs preliminary classification of pixels into three categories (indicating presence, not indicating presence, and previously updated) before the actual background updating process. This preliminary action enables the system to handle surrounded pixels by identifying alternative update paths through previously updated pixels, thus resolving the contradiction between simplicity and completeness.
Solution Approach 2:
The patent introduces 'previously updated pixels' as an intermediary element that mediates between pixels indicating presence and pixels not indicating presence. When surrounded pixels cannot be updated directly through adjacent non-presence pixels, the previously updated pixels serve as intermediate carriers to transmit background information, ensuring complete updating while maintaining methodological simplicity.
2Reliability
If the pixel matrix is divided into multiple updating rounds, then the completeness of background updating is improved, but the complexity of the updating process increases
Solution Approach 1:
The updating process is segmented into multiple rounds, where each round processes a specific subset of pixels based on their classification. This segmentation allows the system to systematically handle different pixel types (surrounded pixels, boundary pixels, interior pixels) in an organized manner, improving completeness while keeping each individual round's complexity manageable through clear classification rules.
Solution Approach 2:
The patent implements periodic action by executing multiple updating rounds in sequence, where each round updates a specific group of pixels. The periodic execution of updating rounds ensures that all pixels are eventually processed, with each round building upon the previous round's results through the classification mechanism, thus achieving complete updating without requiring complex simultaneous processing.
3Productivity
If all pixels are updated in a single round using only adjacent non-presence pixels, then the updating process is fast, but surrounded pixels cannot be updated
Solution Approach 1:
The system employs self-service through the classification mechanism, where previously updated pixels automatically become available as update sources for subsequently processed pixels. This self-service approach eliminates the need for complex external coordination or repeated processing of the same pixels, maintaining high productivity while ensuring complete updating through the automated propagation of background information through the pixel matrix.
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
Ensures complete and precise updating of background information, enhancing the sensor's ability to distinguish between human presence and other heat sources, thereby improving sensitivity and reliability.
Implementation Method 1
they detect thermal radiation in their surroundings, that is, in their detection area. If thermal radiation is detected in the detection area, for example, caused by a person approaching the presence detector, the presence detector converts the radiation into a measurable electric signal
Data Source
AI summary
The disclosure refers to methods and systems for updating background information of a pixel matrix generated by presence sensors. The pixel matrix comprises background information of a presence detection field covered by the presence sensor. The method comprises: a) detecting a first set of pixels comprising pixels indicative of presence having adjacent pixels not being indicative of presence; b) updating a temperature value of each pixel of the first set of pixels with an average value of the temperature of the pixels adjacent to the pixel that are not indicative of presence and/or pixels previously updated; c) detecting a second set of pixels comprising pixels indicative of presence that have adjacent pixels previously updated; d) updating a temperature value of each pixel of the second set of pixels with an average value of the temperature values of the pixels adjacent to the particular pixel that have been previously updated and/or that are not indicative of presence; e) executing steps c) and d) until there are no more pixels indicative of presence to be updated.