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Watermark detection method and system based on SURF and pyramid algorithms

A pyramid algorithm and watermark detection technology, which is applied in the field of computer vision and image processing, can solve the problems of difficult and accurate positioning, inaccurate positioning of watermark areas, and inability to complete watermark detection, so as to achieve the effect of improving efficiency and accuracy

Pending Publication Date: 2019-08-02
绍兴聚量数据技术有限公司 +1
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, for the deviation of displacement, scale and rotation in the image we get from the camera, the existing template matching algorithm is difficult to locate the region of interest (ROI) accurately, resulting in the positioning of the watermark area based on the relative position Inaccurate, so that the watermark detection cannot be completed

Method used

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  • Watermark detection method and system based on SURF and pyramid algorithms
  • Watermark detection method and system based on SURF and pyramid algorithms
  • Watermark detection method and system based on SURF and pyramid algorithms

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Embodiment 1

[0045] Such as figure 1 As shown, this embodiment proposes a watermark detection method based on SURF and pyramid algorithm, including:

[0046] Step S1, scaling the original image to the same size as the second sample image;

[0047] The original image refers to the image used to generate the template, and the second sample image is the image for watermark detection. Therefore, before step S1, also include steps:

[0048] Step S1.1, obtaining the original image including watermark and ROI;

[0049] Specifically, the present invention uses a camera to acquire the original image including the watermark and ROI. For accurate watermark detection, the acquired original image should be clear.

[0050] Step S1.2, create an ROI template area based on the original image; and record the relative position of the ROI and the watermark;

[0051] Step S1.3, acquiring the second sample image including watermark and ROI;

[0052] Specifically, similar to obtaining the original image, t...

Embodiment 2

[0067] Such as figure 2 As shown, this embodiment proposes a watermark detection system based on SURF and pyramid algorithm, including:

[0068] A scaling module, configured to scale the original image to the same size as the second sample image;

[0069] The original image refers to the image used to generate the template, and the second sample image is the image for watermark detection. Therefore, before scaling module processing also includes:

[0070] The first obtaining module is used to obtain the original image including watermark and ROI;

[0071] Specifically, the present invention uses a camera to acquire the original image including the watermark and ROI. For accurate watermark detection, the acquired original image should be clear.

[0072] ROI template creation module, for creating ROI template area based on described original image; And record the relative position of ROI and watermark;

[0073] The second obtaining module is used to obtain the second sampl...

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Abstract

The invention discloses a watermark detection method and system based on SURF and pyramid algorithms. The watermark detection method comprises the following steps: S1, scaling an original image to thesame size as a second sample image; s2, transforming the second sample image into the same scale space as the original image through an SURF algorithm; s3, positioning an ROI region in the transformed second sample image through a pyramid algorithm; s4, determining a watermark position; and S5, detecting the watermark. The method has the advantages of high matching precision, high matching speedand the like.

Description

technical field [0001] The invention relates to the technical field of computer vision and image processing, in particular to a watermark detection method and system based on SURF and pyramid algorithm. Background technique [0002] Image matching is to seek similar image targets through the analysis of the corresponding relationship, similarity and consistency of image content, features, structure, relationship, texture and gray scale. Image matching technology has been widely used in the field of photogrammetry and computer vision, such as target positioning, target tracking and 3D reconstruction. The reliability and computational speed of image matching have a crucial impact on the performance of these applications. Image matching algorithm can be divided into two parts, which are template-based image matching and feature-based image matching. Template-based image matching is mainly a process of using an image as a template and searching for the corresponding position o...

Claims

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Application Information

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IPC IPC(8): G06T1/00G06T7/33
CPCG06T1/0021G06T7/33G06T2201/0065G06T2207/20016
Inventor 李黎陆剑锋张善卿程伟玲
Owner 绍兴聚量数据技术有限公司
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