Infrared image stripe noise elimination method

An infrared image and stripe noise technology, applied in the field of image processing, can solve problems such as artifacts, inability to effectively eliminate noise, and inability to update parameters in real time

Inactive Publication Date: 2015-05-27
XIAN UNIV OF SCI & TECH
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Problems solved by technology

However, the calibration-based method cannot update the parameters in real time, and needs to assume that the parameters remain unchanged for a long period of time between two consecutive calibrations, while the column output circuit bias voltage changes quickly, so it cannot effectively eliminate noise
Although the scene-based co

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  • Infrared image stripe noise elimination method
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  • Infrared image stripe noise elimination method

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Embodiment Construction

[0031] Such as figure 1 As shown, the infrared image streak noise elimination method of the present invention comprises the following steps:

[0032] Step 1. Infrared image collection: use the infrared focal plane array to collect infrared images and transmit the collected infrared images to the image processor synchronously, and the image processor reads the nth frame of infrared image z transmitted to it by the infrared focal plane array n, the nth frame infrared image z n Consisting of M×N pixels, the nth frame of infrared image z n Include streak noise in b n ; Wherein, n, M and N are all natural numbers, and the units of M and N are pixels;

[0033] In this embodiment, the value ranges of M and N mentioned in step 1 are both 200-1500.

[0034] Step 2. Calculate the nth frame infrared image z n The average value of the N columns: the image processor according to the formula Calculate the infrared image z of the nth frame n The column mean of column j of c n (j), g...

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Abstract

The invention discloses an infrared image stripe noise elimination method. The method comprises the following steps: I. collecting an infrared image; II. calculating the average of N rows for the nth frame infrared image zn; III. calling a stripe noise estimation module by an image processor and estimating the stripe noise bn of the nth infrared image zn according to the average of N rows for the nth frame infrared image zn; and IV. subtracting the stripe noise bn of the nth infrared image zn from the nth infrared image through an image processor, thus eliminating the stripe noise in the nth frame infrared image zn. According to the method, the design is novel and reasonable, the steps are simple, and realization is convenient, the stripe noise in the infrared image can be processed in real time, and the method is strong in practicability, good in usage effect, and convenient to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a method for eliminating streak noise of an infrared image. Background technique [0002] Due to manufacturing process problems, the output circuit of the infrared focal plane array usually shares the same output circuit with the same column (or row) of pixels. Since the bias voltage of the column output circuit is not completely consistent, the generated image contains column stripes as the main feature. The non-uniform noise is called streak noise. [0003] In the prior art, methods for eliminating non-uniform noise mainly fall into two categories: calibration-based methods and scene correction-based methods. However, the calibration-based method cannot update the parameters in real time, and needs to assume that the parameters remain unchanged for a long period of time between two consecutive calibrations, while the bias voltage of the column output circu...

Claims

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Application Information

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IPC IPC(8): G06T5/00
Inventor 王书朋
Owner XIAN UNIV OF SCI & TECH
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