Method for performing thermal image processing
By identifying and segmenting obvious object regions in thermal images, and applying contrast enhancement steps and high-frequency filtering methods, the problem of limited dynamic range of thermal imagers under high radiation intensity is solved, and the ability to identify and track low-contrast objects is improved.
CN120107573BActive Publication Date: 2026-06-19AXIS
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- AXIS
- Filing Date
- 2024-11-29
- Publication Date
- 2026-06-19
AI Technical Summary
Technical Problem
Existing thermal imagers have limited dynamic range in high-radiation-intensity monitoring applications, resulting in a reduced signal-to-noise ratio and making it difficult to effectively distinguish and track low-contrast objects.
Method used
By identifying and segmenting obvious object regions in thermal images, a contrast enhancement step is applied to divide blurred edge regions into background edges and object edges. Pixel intensity is adjusted to improve contrast, and high-frequency filtering is used for sharpening.
Benefits of technology
Without increasing computational complexity, it improves the contrast of thermal images and enhances the recognizability of low-contrast areas, making it suitable for object differentiation and tracking during surveillance activities.
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Smart Images
Figure CN120107573B_ABST
Abstract
A method for performing thermal image processing includes: acquiring a thermal image depicting a scene comprising a set of objects; identifying a set of salient object regions in the thermal image, each salient object region comprising a blurred depiction of a corresponding object in the set of objects, and each salient object region being identified as a continuous region of pixels having a pixel intensity that differs from the representative background intensity of the thermal background of the scene by more than a threshold intensity and a size exceeding a threshold size, such that the salient object region comprises an actual object region of actual object pixels and a blurred edge region of blurred edge pixels surrounding the actual object region; segmenting the blurred edge region into a background edge region and an object edge region between the actual object region and the background edge region; and setting the pixels of the object edge region to a representative object intensity determined based on the actual object pixels of the actual object region and setting the pixels of the background edge region to a representative background intensity.
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