Heatmap Generation with Zoom-Stable Cell Diffusion
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Solution Overview
Problem
Existing heatmap technologies fail to accurately reflect region features and maintain continuity when the zoom ratio of an image is adjusted, resulting in discontinuous and inaccurate representation of density data.
Innovation Solution
A method and apparatus for generating heatmaps that divide the image into cells with adjustable side lengths and heat weights, using cell and heat weight change functions to ensure continuity and accuracy across different zoom ratios, incorporating both basic and diffusion heat calculations to present heat values accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a point depiction method is used to draw one heat point for one data point, then the heatmap can be generated quickly, but the heatmap cannot reflect region feature continuously and accurately when zoom ratio changes
Solution Approach 1:
The image is divided into multiple square cells with side length r = α*r1, where each cell independently calculates basic heat for its heat point region. This segmentation allows the system to maintain both processing efficiency (by working with discrete cells) and continuous representation (through diffusion heat calculation across cell boundaries), resolving the contradiction between generation speed and accuracy.
Solution Approach 2:
Different regions are treated with different heat calculation approaches: cells with data points calculate basic heat, while surrounding regions calculate diffusion heat. The heat weight w = β*w1 adjusts locally based on zoom ratio, ensuring that each region contributes appropriately to the overall heatmap accuracy without requiring complete recalculation of all points.
2Adaptability or versatility
If the zoom ratio of the image is adjusted, then the display scale changes, but the heatmap cannot maintain continuity and accuracy of region feature representation
Solution Approach 1:
The cell side length r and heat weight w are made dynamic by introducing zoom ratio-dependent functions α and β. When zoom ratio changes, these functions automatically adjust the cell dimensions and heat weights to maintain consistent visual representation and continuous heatmap properties across different scales, preventing the heatmap from breaking into discrete points or merging into indistinguishable blobs.
3Ease of manufacture
If existing heatmap technologies are used, then simple color mapping can be applied, but the heatmap becomes a scatter chart when zoomed in and a big heat point when zoomed out, losing practical significance
Solution Approach 1:
Diffusion heat acts as an intermediary between discrete data points and continuous heatmap representation. By calculating diffusion heat for pixels in the diffusion heat region of each cell, the system creates a smooth transition zone that connects individual data points into a continuous density field, maintaining reliability of data distribution representation while keeping the generation process relatively simple.
Data Source
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AI summary
Embodiments of this application relate to the field of image processing, and provide a method and an apparatus for generating a heatmap, so as to implement that a heatmap reflects a region feature continuously and accurately, and a change in an image zoom ratio does not affect continuity and accuracy of the heatmap. Specific solutions include: dividing a current display region of an original image on a screen into cells; calculating basic heat of a heat point region in each cell according to statistics and a heat weight for generating a heatmap this time; then calculating, according to the basic heat of the heat point region in the cell, diffusion heat to which each pixel in the current display region is subject; obtaining total heat of each pixel in the current display region; and presenting, in the current display region of the original image according to a preset heat presentation correspondence, a color corresponding to the total heat of each pixel in the current display region, to obtain a heatmap of the current display region. This application is used to generate a heatmap.