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Image noise reduction method based on optimal original color signal

An image noise and original image technology, which is applied in the field of image noise suppression based on the best primary color signal, can solve the problems of image feature processing details that cannot be preserved, and consumes computing resources, so as to achieve the effect of not blurring digital images and suppressing noise spots.

Inactive Publication Date: 2009-07-22
ALTEK CORP
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Problems solved by technology

[0004] The object of the present invention is to provide a method of suppressing image noise based on the best primary color signal, by means of performing the method of suppressing image noise with a digital camera, using the primary color signal with the best signal-to-noise ratio, correcting the poor primary color signal, and then suppressing the digital image noise speckle, to solve the problems in the above-mentioned known technologies that suppressing digital image noise consumes computing resources and excessive processing of image features causes details to be unable to be preserved.

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  • Image noise reduction method based on optimal original color signal

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no. 1 example

[0028] figure 1 It is a flowchart of a method for suppressing image noise based on an optimal primary color signal in a preferred embodiment of the present invention. Please refer to figure 1 , in this embodiment, a digital camera is used to implement the method for suppressing image noise, so as to suppress noise in the digital image. The method for suppressing image noise based on the best primary color signal comprises the following steps:

[0029] Firstly, a digital image is loaded, and multiple primary color signals in the digital image are extracted (step S110). After that, select the best primary color signal among these primary color signals, and use a high-pass filter and a low-pass filter to decompose the best primary color signal into a high-frequency signal and a low-frequency signal (step S120); then, select these primary color signals The worst primary color signal, and use a high-pass filter and a low-pass filter to decompose the worst primary color signal in...

no. 2 example

[0035] Figure 5 It is a flowchart of a method for suppressing image noise based on an optimal primary color signal according to another preferred embodiment of the present invention. Please refer to Figure 5, the implementation of this embodiment is similar to the above-mentioned first embodiment. However, it is different from the first embodiment in that this embodiment also sets the signal mixing weight ratio to adjust the mixing ratio of the waveforms. Since each primary color signal (red primary color signal, green primary color signal, or blue primary color signal) performs gain compensation on the primary color signal in different proportions, the base waveforms of the obtained primary color signals are different (that is, the waveforms of the low frequency signals are different). Therefore, when replacing the high frequency portion of the poor primary color signal with the low frequency of the better primary color signal, the signal mixing weight ratio is also set a...

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Abstract

The invention discloses a method for inhibiting an image noise based on an optimum primary color signal. A digital camera executes this noise inhibition method to inhibit the noise in the digital images mainly comprising: taking out the primary color signal in the digital image, taking out the high and low frequency signals of the optimum primary color signal through a high-pass filter and a low-pass filter, and the high and low frequency signals of the worst primary color signal, then mixing the high frequency signal of the optimum primary color signal and the worst primary color signal, and stacking the mixed signals to the low frequency signal of the worst primary color signal to obtain the digital image signal after the noise inhibition.

Description

technical field [0001] The invention discloses a method for suppressing image noise, in particular to a method for suppressing image noise based on the best primary color signal. Background technique [0002] The shooting quality of a digital camera depends on the photosensitive components, such as photosensitive coupling components (Charge Coupled Device, CCD), complementary metal oxide semiconductor components (Complementary Metal-Oxide Semiconductor, CMOS) and other components of the photosensitive capabilities. However, when a digital camera shoots in a high-sensitivity mode (HighISO), image noise is unavoidable, and these image noises are usually randomly distributed spots. At present, many digital cameras have a noise reduction function, which enables the digital camera to suppress the noise of the captured image when the digital camera is in a high-sensitivity mode. Most of the existing image sensing components have the characteristics of inconsistent sensitivity of ...

Claims

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Application Information

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IPC IPC(8): H04N5/217H04N5/21
Inventor 王馨德詹振宏
Owner ALTEK CORP
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