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Image brightness compensation method and device, and terminal device

A technology of image brightness and compensation device, which is applied in the field of image processing, can solve the problems of enhancing noise, image denoising processing influence, etc., and achieve the effect of reducing burden, uniform brightness, and suppressing noise

Active Publication Date: 2016-05-18
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, while compensating for dark corners, it also enhances the noise, which has a great impact on the later image denoising processing.

Method used

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  • Image brightness compensation method and device, and terminal device
  • Image brightness compensation method and device, and terminal device
  • Image brightness compensation method and device, and terminal device

Examples

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Embodiment Construction

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0027] The image brightness compensation method, device and terminal equipment according to the embodiments of the present invention are described below with reference to the accompanying drawings.

[0028] Specifically, the method for compensating dead pixels of an image sensor provided in this embodiment is configured in a terminal device with an image sensor for specific description. It should be noted that there are many types of terminal devices, such as mobile phones, IPADs, and smart wearable devices.

[0029] figure 1 i...

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Abstract

The invention provides an image brightness compensation method and device, and a terminal device. An image sensor provided in advance comprises a light-sensing pixel array and a light filter disposed on the light-sensing pixel array. The light filter comprises a light-filtering unit array. Each light-filtering unit covers multiple light-sensing pixels and forms a combined pixel. The method comprises steps of: detecting whether combined pixels at corners reach preset brightness when a combined image is generated by adding the outputs of multiple light-sensing pixels belonging to one combined pixel to acquire a pixel value; if yes, performing depressed compensation on the brightness of other combined pixels according to a preset compensation strategy and with reference to the pixel values of the combined pixels at the corners. The method and device achieve brightness depressed compensation on the pixels from a center to the corners so that the brightness of an entire image is uniform and the noise of the entire image is controlled to a certain extent. Thus, image quality is increased and burden of later image de-nosing is decreased.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image brightness compensation method, device and terminal equipment. Background technique [0002] Since the lens and lenses are relatively small, the amount of light entering is limited. At the same time, the brightness of the image decreases concentrically. In order to ensure the uniformity of the brightness of the image, it is necessary to enhance and compensate the brightness of the corner pixels to avoid the occurrence of vignetting. However, while compensating the dark corners, the noise is also enhanced, which has a great impact on the image denoising process in the later stage. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. [0004] For this reason, the first object of the present invention is to propose a method for image brightness compensation,...

Claims

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Application Information

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IPC IPC(8): H04N5/235G06T5/50
CPCG06T5/50H04N23/741
Inventor 刘银华
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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