Shadow detection method and system for monitoring video image, and shadow removing method
A technology for shadow detection and surveillance video, applied in the field of image processing, can solve problems such as geometric attribute distortion
Active Publication Date: 2018-03-06
SUZHOU KEDA TECH
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Problems solved by technology
[0003] If the shadow is detected as the monitoring target by mistake, it is easy to cause the adhesion, fusion, and geometric attribute distortion of the monitoring target.
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[0032] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar structures in the drawings, and thus their repeated descriptions will be omitted.
[0033] The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the invention. However, those skilled in the art will appreciate that the technical solutions of the present invention may be practiced without one or more of the specific...
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The invention reveals a shadow detection method and system for a monitoring video image, and a shadow removing method. The shadow detection method comprises the following steps: obtaining a current frame and a background frame from source data; obtaining first candidate shadow regions from the current frame; calculating shadow detection values of all first candidate shadow regions in a local ternary pattern, and selecting second candidate shadow regions; calculating hue and saturation detection values and gradient detection values for all second candidate shadow regions; estimating the shadowthreshold, hue and saturation thresholds and gradient thresholds for the local ternary pattern; calculating the shadow detection values, hue and saturation detection values and gradient detection values of the local ternary patterns of all first candidate shadow regions; and selecting the first candidate shadow region with all the shadow detection value, hue and saturation detection value and gradient detection value of the local ternary pattern being within the range of a threshold value as a shadow region.
Description
technical field [0001] The invention relates to the technical field of image processing, in particular to a shadow detection method for a surveillance video image, a shadow detection system for a surveillance video image, and a shadow removal method for a surveillance video image using the shadow detection method for a surveillance video image. Background technique [0002] The monitoring system is one of the most widely used systems in the security system. For surveillance technology, shadows in surveillance scenes (including shadows of surveillance targets and shadows of other background objects, etc.) have always been an important factor that interferes with the monitoring and detection of surveillance targets, especially under lighting conditions, surveillance targets that are in motion The projected shadow and the monitoring target "follow like a shadow", that is, the shadow projected by the monitoring target has similar motion attributes to the monitoring target, and t...
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Login to View More IPC IPC(8): G06T7/187G06T7/269G06T7/49G06T7/60G06T7/90G06T5/00
CPCG06T7/187G06T7/269G06T7/49G06T7/60G06T7/90G06T2207/20032G06T5/70G06T7/11G06T7/136G06T2207/10024G06T5/94G06T7/62G06T7/194G06T7/73G06T2207/10016G06T2207/30232
Inventor 晋兆龙邹文艺陈卫东
Owner SUZHOU KEDA TECH