Method for adjusting lens imaging brightness
An adjustment method and imaging technology, which can be used in image communication, color TV parts, TV system parts, etc., and can solve problems such as human visual discomfort and uneven image brightness.
Inactive Publication Date: 2015-06-10
KUNSHAN BRANCH INST OF MICROELECTRONICS OF CHINESE ACADEMY OF SCI
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The brightness of the image formed by the lens is uneven, which will cause discomfort to the human eye
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[0031] The invention provides a method for adjusting the imaging brightness of a lens, so that the brightness of the image formed by the lens is uniform.
[0032] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0033] see figure 1 , a method for adjusting lens imaging brightness provided by an embodiment of the present invention, comprising the steps of:
[0034] S100: Calibrating fixed points in lens imaging.
[0035] S101: Obtain the calculation relational expression of the intrinsic brightness difference between the point to be adjusted and the fixed point and the distance between the two points, where the intrinsic brightness difference is the difference between the point to be adjusted and the fixed point when the imaging is a background image Brightness difference of the fixed p...
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The invention discloses a method for adjusting lens imaging brightness. The method comprises the steps of calibrating a fixed point in lens imaging; acquiring a calculation relational expression between the local oscillator brightness difference between a point to be adjusted and the fixed point and the distance of the two points, wherein the local oscillator brightness difference is the brightness difference between the point to be adjusted and the fixed point when the image is used as a background image; adjusting the brightness value of the point to be adjusted according to the distance from the point to be adjusted to the fixed point and the calculation relational expression during imaging. According to the method, the calculation relational expression between the local oscillator brightness difference between the point to be adjusted and the fixed point and the distance of the two points is obtained, the local oscillator brightness difference of the point to be adjusted and fixed point is calculated according to the calculation relational expression, and then the brightness value of the point to be adjusted is further adjusted during imaging according to the distance from the point to be adjusted to the fixed and the calculation relational expression; therefore, the lens imaging brightness can be adjusted, and the formed image is uniform in brightness; the method is small in calculation quantity, stable in algorithm, high in practicability, and wide in applicable scope.
Description
technical field [0001] The invention relates to the field of optical image processing, in particular to a method for adjusting lens imaging brightness. Background technique [0002] Optical lens is an important imaging device of imaging equipment, which is widely used in intelligent transportation, astronomy, meteorology, national defense and military fields. [0003] In recent years, with the continuous development of optical lens and imaging chip technology, in order to meet certain shooting requirements, optical lenses with specific optical designs will be used. For example, fisheye lenses are used to expand the imaging field of view. 270-degree ultra-wide-angle imaging. [0004] However, based on the optical and physical characteristics of the lens, the image formed by the optical lens will have the problem of uneven brightness in the entire imaging area. For example, brightness attenuation, that is, the brightness of the formed image gradually decays from the center p...
Claims
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IPC IPC(8): H04N5/235
Inventor 高鹴闫硕徐以强李庆
Owner KUNSHAN BRANCH INST OF MICROELECTRONICS OF CHINESE ACADEMY OF SCI