Non-uniformity correction method for gas leakage detection and gas leakage detection device

Abstract

The invention relates to the technical field of data identification, in particular to a non-uniformity correction method for gas leakage detection. The non-uniformity correction method comprises the following steps: a gas leakage detection device acquires a gain coefficient Gij and a bias coefficient Qij of each temperature section and stores acquired infrared images; gas areas in the infrared images are identified through texture and edge features; the temperature of each point of images in non-gas areas is detected, and the areas are divided; non-uniformity correction is performed on images in each sub-area through a non-uniformity correction unit. The invention further provides the gas leakage detection device. The gas leakage detection device comprises a casing, wherein a main control chip is arranged in the casing and connected with an infrared imaging module, a display module and a power module, the power module supplies power to the other modules, and the infrared imaging module comprises an infrared lens, an infrared window and an infrared image sensor which are arranged sequentially. The non-uniformity correction method for gas leakage detection and the gas leakage detection device can improve the gas non-uniformity correction effect and improve the gas leakage detection precision.

Description

technical field [0001] The invention relates to the technical field of data identification, in particular to a non-uniform correction method for gas leakage detection and a gas leakage detection device. Background technique [0002] Thermal imaging cameras are increasingly being used in military, industrial and civilian applications. However, since the response parameters (including responsivity factor and cutoff factor) of each infrared photosensitive element are not the same, even when the input of the infrared focal plane array is uniform, the output voltages of each photosensitive element are also different, thus Non-uniformity problems arise. In addition, the readout circuit and the coupling of the readout circuit to the detector can also cause non-uniformity problems. Therefore, non-uniformity correction is a key problem that needs to be solved in the design of thermal imaging cameras. [0003] Commonly used non-uniformity correction methods include: temperature cal...

AI Technical Summary

Problems solved by technology

For the field of gas leak detection, equipment pipelines and leaking gas have high temperature, while the temperature of the external environment is low, and there is often a large temperature difference in an image. For a frame of infrared image with a large temperature difference, the above method is used to perform non-uniform Correction effect is poor

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