Method for removing sunspot regions in image, image processor and photographing device

An image processor and sunspot technology, applied in the field of image processing, can solve the problems of inability to accurately judge the transition area, poor image effect, and inability to accurately judge the transition area, so as to achieve better image effects and avoid residual effects.

Inactive Publication Date: 2018-01-12
BYD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the transitional area cannot be accurately judged by using the small brightness of the center of the sunspot and the high brightness around the sunspot to judge the black area of ​​the sunspot; moreover, the identific

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  • Method for removing sunspot regions in image, image processor and photographing device
  • Method for removing sunspot regions in image, image processor and photographing device
  • Method for removing sunspot regions in image, image processor and photographing device

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Embodiment Construction

[0022] 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.

[0023] When the sunspot phenomenon appears in the image, such as figure 1 As shown, it is relatively simple to judge and remove the dark region of the sunspot region, but it is more difficult to judge and remove the transition region, so in the embodiment of the present invention, the judgment of the transition region is not performed, and the dark region and the transition region are simultaneously Remove, to avoid the residue of the transition area, improve the effect of the image.

[0024] A method for removing sunspot region...

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Abstract

The invention discloses a method for removing sunspot regions in an image. The method comprises the steps of acquiring a current frame image; and determining a dark region in the current frame image according to the brightness value of the pixel points in the current frame image, wherein the pixel points are determined to be in the dark region when the brightness value of the pixel points is smaller than the threshold value of the dark region, and generating a sunspot identification signal; calculating the length of each row of the dark region according to the sunspot identification signal, and taking the sum of the length of each row of the dark region and the transition threshold value as the length of the sunspot region of the row; determining the diameter of the sunspot region according to the length of the sunspot region of each row; determining the center coordinate according to the coordinate value of the sunspot region where the diameter is located; determining the sunspot region according to the diameter and the center coordinate in the next frame of the image, and removing the sunspot region in the next frame of the image. According to the method, no transition region residue exists when the sunspot region is removed, and the image effect is better. The invention further discloses an image processor and a photographing device.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a method for removing sunspot areas in an image, an image processor and a photographing device. Background technique [0002] When the image sensor takes pictures towards a brighter point such as the sun, due to the pixel unit and structure of the image sensor, when the image sensor is used under strong light, bright spots will appear. For example, the center of the sun is a very dark circle, while the sun The phenomenon of very bright surroundings is called the sunspot phenomenon. The characteristic of the sunspot phenomenon is that the pixel area around the sun is very bright, and the R, G, and B values ​​in this area are very large and close to 255. The pixel area inside the sun is very dark, and the R, G, and B values ​​​​in this area are very small and close to 0. From the very bright pixel area to the very dark pixel area, there is a transition area o...

Claims

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Application Information

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IPC IPC(8): H04N5/217H04N5/232
Inventor 罗贺
Owner BYD CO LTD
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