Image shadow removing method and device
A shadow and image technology, applied in the field of image processing, can solve the problems of poor robustness and real-time performance, difficult to implement, etc., and achieve the effect of good robustness and improved efficiency
Active Publication Date: 2014-12-24
开立生物医疗科技(武汉)有限公司
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The equalization algorithm without mathematical physical model and the model algorithm based on human eye perception will lose the information that reflects the light intensity carried by the image, but this kind of information plays an important role in endoscopy, so this algorithm is not suitable for use in In the endoscope, in addition, the equalization algorithm without a mathematical physical model and the equalization algorithm with a mathematical physical model are less robust and real-time, and it is difficult to implement in the endoscope
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[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0023] The embodiment of the present invention provides an image removing shadow method, which is used for removing shadow of an image in real time, and has good robustness. The embodiment of the present invention also provides an image removing shadow device correspondingly.
[0024] The image removing shadow device provided by the embodiment of the present invention can be built into systems such as ordinary cameras or medical electronic endoscopes, especially in ...
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An embodiment of the invention discloses an image shadow removing method and device which is used for removing shadows in real time, high in speed and high in robustness. The method includes sequentially forming N realtime image areas between the center and the edge of a to-be-processed image by dividing, wherein no overlapped portion exists between each two adjacent realtime image areas, and N is a positive integer larger than or equal to 2; calculating a light intensity average value of all pixel points in each realtime image area, and acquiring a shadow curve ac cording to all light intensity average value, wherein the shadow curve indicates image shadow distribution condition of the to-be-processed image; fitting the shadow curve to acquire a shadow removing function; performing shadow removing on the to-be-processed image according to the shadow removing function.
Description
technical field [0001] The present invention relates to the technical field of image processing, in particular to an image removing shadow method and device. Background technique [0002] In the process of camera video imaging, due to factors such as lighting, mechanical structure, and objective lens characteristics, the final image will show uneven brightness. Generally, this phenomenon is named shadow. In the medical electronic endoscope system, due to the phenomenon of uneven image brightness, the effective observation area is reduced, the contrast of biological tissues is reduced, and the image quality is reduced, which is not conducive to clinical real-time diagnosis and identification of lesion areas. [0003] At present, there are many algorithms used to correct the uneven brightness of images, such as equalization algorithms without mathematical and physical models and equalization algorithms with mathematical and physical models. Among them, the equalization algorit...
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IPC IPC(8): G06T5/00
Inventor 冯能云陈云亮佟异
Owner 开立生物医疗科技(武汉)有限公司