Camera module offset estimation method and device, storage medium and terminal
A camera module and equation technology, which is applied in image communication, television, electrical components, etc., can solve the problem that the offset measurement method of the camera module cannot take into account the measurement efficiency and measurement cost, etc.
Active Publication Date: 2021-02-26
BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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[0007] The technical problem solved by the embodiments of the present invention is that the offset measurement method of the camera module cannot take into account both measurement efficiency and measurement cost
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[0024] In the existing technology, some errors inevitably exist in the production process of the camera module. Due to the existence of errors, the lens optical center shift and optical axis deflection will occur in the actual manufacturing and assembly process, which will affect the imaging quality and seriously affect the smart phone. shooting effect. refer to figure 1 , giving a schematic diagram of the optical center shift, figure 2 A schematic diagram of optical axis deflection is given. Wherein, the optical center shift means that the optical axis 13 (the optical axis refers to the line at the center of the lens) of the lens 12 (mainly refers to the lens) and the center line 14 (the line at the center of the image sensor) of the image sensor 11 cannot maintain strict coincidence, and the optical axis A certain offset occurs between 13 and the centerline 14. Optical axis deflection means that the lens 12 and the image sensor 11 cannot be kept strictly parallel, and th...
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The invention discloses a camera module offset estimation method and device, a storage medium and a terminal. The camera module offset estimation method comprises the steps: obtaining a lens shadow calibration parameter of a camera module, wherein the lens shadow calibration parameter comprises the coordinates of each pixel sampling point and the corresponding gain; constructing an elliptic paraboloid equation used for representing the relationship between the spatial position of the pixel sampling point and the gain; solving parameters of the elliptic paraboloid equation according to the lensshadow calibration parameters; and according to the parameters of the elliptic paraboloid equation, carrying out offset estimation of the camera module, wherein the offset estimation comprises at least one of optical center offset estimation and optical axis offset estimation. According to the scheme, the offset estimation cost and efficiency can be considered.
Description
technical field [0001] Embodiments of the present invention relate to the field of camera modules, and in particular to a camera module offset estimation method and device, a storage medium, and a terminal. Background technique [0002] With the increasing demand for smartphones in the consumer market, the demand for camera modules is also growing simultaneously. The mobile phone camera module needs to have the characteristics of lightness and small size, which also puts forward higher requirements for the manufacture and assembly of the module. In an ideal camera module, the optical center of the lens and the geometric center of the image sensor should be located on the straight line of the optical axis, and the optical axis of the lens should be perpendicular to the plane of the image sensor. However, there are inevitably some errors in the production process. Due to the existence of errors, the lens optical center shift and optical axis deflection will occur in the actua...
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IPC IPC(8): H04N17/00
CPCH04N17/002
Inventor 霍星蔡进邵娜
Owner BEIJING SPREADTRUM HI TECH COMM TECH CO LTD