CN113469867A - Digital watermark generation method, system and control method for remote sensing image - Google Patents
Digital watermark generation method, system and control method for remote sensing image Download PDFInfo
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Abstract
The invention discloses a method, a system and a control method for generating a digital watermark of a remote sensing image, wherein the method for generating the digital watermark comprises the steps of obtaining the position relation information between at least two adjacent remote sensing images; setting a digital watermark type; setting digital watermark information; the method comprises the steps of generating left and right digital watermark type first seam digital watermarks on two remote sensing images in a left and right position relationship, and/or generating upper and lower digital watermark type second seam digital watermarks on the two remote sensing images in an upper and lower position relationship, and/or generating four-corner digital watermark type third seam digital watermarks on four remote sensing images in a four-corner position relationship, wherein the first seam digital watermark, the second seam digital watermark and the third seam digital watermark all comprise digital watermark information. The scheme can solve the problems that when the digital watermark is applied to remote sensing images with large batch and position information, the information writing amount is large, and the position relation between the remote sensing images cannot be distinguished.
Description
Technical Field
The present application relates to the field of digital watermarking technologies, and in particular, to a method and a system for generating a digital watermark of a remote sensing image, and a control method thereof.
Background
Digital Watermarking (Digital Watermarking) technology is to embed some identification information directly into a Digital carrier (including multimedia, documents, software, etc.), but does not affect the use value of the original carrier. The information embedded in the carrier can be used for confirming content creators, purchasers, transmitting information or judging whether the carrier is tampered or not. The image watermarking is the most widely applied digital watermarking, and professional image processing software provides an image watermarking function. In recent years, with the wide application of satellite image maps, the application demand of digital watermarking technology on remote sensing images is increasing, characters or pictures are embedded into the remote sensing images, and the functions of data source tracing and intellectual property protection are mainly played.
The difference between the remote sensing image and the common picture has two aspects, namely, the remote sensing image has position information, namely, the images have position relation; secondly, the number of files is large, and hundreds of or even thousands of remote sensing images are often formed for remote sensing imaging in a large range.
The traditional digital watermark generating system generates watermarks for each picture aiming at a single picture, namely all information of the digital watermarks is written into the picture, the content of single digital watermarks is the same, namely each picture adopts the same watermark, but when the traditional digital watermark generating system is applied to hundreds of or even thousands of remote sensing images, the single digital watermarks need to comprise hundreds of or even thousands of remote sensing images, so that the information writing amount of the single digital watermarks is large, and meanwhile, the position relation between the remote sensing images cannot be distinguished through the digital watermarks on the remote sensing images.
Disclosure of Invention
The application discloses a method and a system for generating a digital watermark of a remote sensing image and a control method thereof, which can solve the problems that when the digital watermark is applied to the remote sensing images with large batch and position information, the information writing amount is large, and the position relation between the remote sensing images cannot be distinguished.
In order to solve the above problems, the following technical solutions are adopted in the present application:
in a first aspect, an embodiment of the present application discloses a method for generating a digital watermark of a remote sensing image, including:
acquiring position relation information between at least two adjacent remote sensing images, wherein the position relation information comprises a left-right position relation, an upper-lower position relation and a four-corner position relation;
setting digital watermark types, wherein the digital watermark types comprise a left digital watermark type, a right digital watermark type, an upper digital watermark type, a lower digital watermark type and a four-corner digital watermark type;
setting digital watermark information;
and generating a first U-shaped digital watermark of a left-right digital watermark type on two remote sensing images in the left-right position relationship, and/or generating a second U-shaped digital watermark of an upper-lower digital watermark type on two remote sensing images in the upper-lower position relationship, and/or generating a third U-shaped digital watermark of a four-corner digital watermark type on four remote sensing images in the four-corner position relationship, wherein the first U-shaped digital watermark, the second U-shaped digital watermark and the third U-shaped digital watermark all comprise digital watermark information.
In a second aspect, an embodiment of the present application discloses a digital watermark generating system for a remote sensing image, including:
the remote sensing image reading module reads a remote sensing image file, and the remote sensing image file comprises at least two adjacent remote sensing images;
the remote sensing image position relation judging module acquires position relation information between the at least two adjacent remote sensing images, wherein the position relation information comprises a left-right position relation, an upper-lower position relation and a four-corner position relation;
the digital watermark information setting module is used for setting digital watermark information;
the digital watermark type setting module is used for setting digital watermark types, and the digital watermark types comprise a left digital watermark type, a right digital watermark type, an upper digital watermark type, a lower digital watermark type and a four-corner digital watermark type;
a digital watermark generating module, configured to generate a first u-shaped digital watermark of the left-right digital watermark type on two remote sensing images in the left-right positional relationship, and/or generate a second u-shaped digital watermark of the upper-lower digital watermark type on two remote sensing images in the upper-lower positional relationship, and/or generate a third u-shaped digital watermark of the four-corner digital watermark type on four remote sensing images in the four-corner positional relationship, where the first u-shaped digital watermark, the second u-shaped digital watermark, and the third u-shaped digital watermark all include the digital watermark information.
Optionally, in the digital watermark generating system for remote sensing images, the remote sensing image position relation determining module includes a remote sensing image centroid distance calculating unit and a remote sensing image centroid connecting line azimuth angle calculating unit, the remote sensing image centroid distance calculating unit calculates the centroid distances of the two remote sensing images, and the remote sensing image centroid connecting line azimuth angle calculating unit calculates the azimuth angles of the two remote sensing image centroid connecting lines;
under the condition that the centroid distance is a first distance and the azimuth angle is a first angle, the position relation information of the two remote sensing images is the left-right position relation;
under the condition that the centroid distance is a second distance and the azimuth angle is a second angle, the position relation information of the two remote sensing images is the up-down position relation;
and under the condition that the centroid distance is a third distance and the azimuth angle is a third angle, the position relation information of the two remote sensing images is the four-corner position relation.
Optionally, in the system for generating a digital watermark of a remote sensing image, the digital watermark information includes at least one of a digital watermark position, a digital watermark margin, a digital watermark transparency, and a digital watermark rotation angle.
Optionally, in the digital watermark generating system for remote sensing images, the digital watermark generating system for remote sensing images further includes a file saving module, the file saving module saves the remote sensing images processed by the digital watermark generating module according to file saving information, and the file saving information includes whether to cover at least one of an original file, a file type, and a saving position.
Optionally, in the digital watermark generating system for remote sensing images, the digital watermark generating system for remote sensing images further includes a file type determining module and a file type converting module;
the file type judging module is used for judging whether the file type of the remote sensing image is the same as the specified file type;
under the condition that the remote sensing image file type is the same as the specified file type, the remote sensing image reading module reads the remote sensing image file;
and under the condition that the remote sensing image file type is different from the specified file type, the file type conversion module converts the remote sensing image file type into the specified file type.
In a third aspect, an embodiment of the present application discloses a control method for a digital watermark generation system of a remote sensing image, which is applied to the digital watermark generation system of the remote sensing image, and the control method includes:
controlling the remote sensing image reading module to read a remote sensing image file, wherein the remote sensing image file comprises at least two adjacent remote sensing images;
controlling the remote sensing image position relation judging module to obtain position relation information between the at least two adjacent remote sensing images, wherein the position relation information comprises a left-right position relation, an upper-lower position relation and a four-corner position relation;
controlling the digital watermark information setting module to set digital watermark information;
controlling the digital watermark type setting module to set digital watermark types, wherein the digital watermark types comprise a left digital watermark type, a right digital watermark type, an upper digital watermark type, a lower digital watermark type and a four-corner digital watermark type;
and controlling the digital watermark generation module to generate a first U-shaped digital watermark of a left digital watermark type and a right digital watermark type on two remote sensing images of the left-right position relationship, and/or generate a second U-shaped digital watermark of the upper-lower digital watermark type on two remote sensing images of the upper-lower position relationship, and/or generate a third U-shaped digital watermark of the four-corner digital watermark type on four remote sensing images of the four-corner position relationship, wherein the first U-shaped digital watermark, the second U-shaped digital watermark and the third U-shaped digital watermark all comprise the digital watermark information.
Optionally, in the control method of the digital watermark generating system for remote sensing images, the step of controlling the remote sensing image position relationship determining module to obtain the position relationship information between the at least two adjacent remote sensing images includes:
controlling the remote sensing image centroid distance calculation unit to calculate the centroid distances of the two remote sensing images;
controlling the remote sensing image centroid connecting line azimuth angle calculation unit to calculate the azimuth angle of the two remote sensing image centroid connecting lines;
under the condition that the centroid distance is a first distance and the azimuth angle is a first angle, the position relation information of the two remote sensing images is the left-right position relation;
under the condition that the centroid distance is a second distance and the azimuth angle is a second angle, the position relation information of the two remote sensing images is the up-down position relation;
and under the condition that the centroid distance is a third distance and the azimuth angle is a third angle, the position relation information of the two remote sensing images is the four-corner position relation.
Optionally, in the control method of the digital watermark generating system for remote sensing images, the digital watermark generating system for remote sensing images further includes a file type determining module and a file type converting module; the file type judging module is used for judging whether the file type of the remote sensing image is the same as the specified file type; under the condition that the remote sensing image file type is the same as the specified file type, the remote sensing image reading module reads the remote sensing image file; under the condition that the remote sensing image file type is different from the specified file type, the file type conversion module converts the remote sensing image file type into the specified file type, and before the step of controlling the remote sensing image reading module to read the remote sensing image file, the control method further comprises the following steps:
controlling the file type judging module to judge whether the file type of the remote sensing image is the same as the specified file type;
under the condition that the remote sensing image file type is the same as the specified file type, controlling the remote sensing image reading module to read the remote sensing image file;
and under the condition that the remote sensing image file type is different from the specified file type, controlling the file type conversion module to convert the remote sensing image file type into the specified file type, and controlling the remote sensing image reading module to read the remote sensing image file processed by the file type conversion module.
Optionally, in the control method of the digital watermark generating system for remote sensing images, the digital watermark generating system for remote sensing images further includes a file saving module, where the file saving module saves the remote sensing images processed by the digital watermark generating module according to file saving information, and the control method further includes:
and controlling the file storage module to store the remote sensing image processed by the digital watermark generation module according to file storage information, wherein the file storage information comprises at least one of whether an original file is covered, a file type and a storage position.
The technical scheme adopted by the application can achieve the following beneficial effects:
in the method for generating digital watermarks of remote sensing images disclosed by the embodiment of the application, first seam digital watermarks of a left digital watermark type and a right digital watermark type are generated on two remote sensing images in a left-right position relationship, second seam digital watermarks of a top digital watermark type and a bottom digital watermark type are generated on two remote sensing images in a top-bottom position relationship, third seam digital watermarks of a four-corner digital watermark type are generated on four remote sensing images in a four-corner position relationship, and the first seam digital watermark, the second seam digital watermark and the third seam digital watermark all comprise digital watermark information.
According to the technical scheme, the first, second and third seam digital watermarks of the cross remote sensing image can be generated, the first, second and third seam digital watermarks reflect the position relation among the remote sensing images, the safety of the remote sensing image data is protected, and the integrity of batch data is guaranteed, so that the missing of individual remote sensing images can be intuitively reflected through the generated digital watermarks. The method for generating the digital watermark of the remote sensing image can reduce the information writing amount of the single digital watermark, the information of the single digital watermark only needs to be written into all the information of the digital watermark corresponding to the remote sensing image, and the digital watermark information of all the remote sensing images does not need to be written into all the information. Meanwhile, the cross-file straddling type digital watermark also has the advantages of small digital watermark covering in the aspect of browsing the remote sensing image, small influence on the original remote sensing image and the like because the digital watermark is positioned at the edge of a single remote sensing image, so that the method for generating the digital watermark of the remote sensing image can be better applied to the aspects of analyzing the remote sensing image and displaying the remote sensing electronic map.
Therefore, the method for generating the digital watermark of the remote sensing image can solve the problems that when the digital watermark is applied to the remote sensing images with large batch and position information, the information writing amount is large, and the position relation between the remote sensing images cannot be distinguished.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings needed to be used in the embodiments or the background art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without any inventive exercise.
Fig. 1 is a flowchart of a digital watermark generation method for a remote sensing image disclosed in an embodiment of the present application;
fig. 2 is a schematic diagram of a digital watermark generation system for a remote sensing image disclosed in an embodiment of the present application.
Description of reference numerals:
100-a remote sensing image reading module;
200-a remote sensing image position relation judgment module;
300-digital watermark information setting module;
400-digital watermark type setting module;
500-digital watermark generation module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. The objects distinguished by "first", "second", and the like are usually a class, and the number of the objects is not limited, and for example, the first object may be one or a plurality of objects. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The technical solutions disclosed in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Referring to fig. 1 to fig. 2, an embodiment of the present application discloses a method for generating a digital watermark of a remote sensing image, where the method for generating a digital watermark of a remote sensing image includes:
acquiring position relation information between at least two adjacent remote sensing images, wherein the position relation information comprises a left-right position relation, an upper-lower position relation and a four-corner position relation;
setting digital watermark types, wherein the digital watermark types comprise a left digital watermark type, a right digital watermark type, an upper digital watermark type, a lower digital watermark type and a four-corner digital watermark type;
setting digital watermark information;
the method comprises the steps of generating left and right digital watermark type first seam digital watermarks on two remote sensing images in a left and right position relationship, and/or generating upper and lower digital watermark type second seam digital watermarks on the two remote sensing images in an upper and lower position relationship, and/or generating four-corner digital watermark type third seam digital watermarks on four remote sensing images in a four-corner position relationship, wherein the first seam digital watermark, the second seam digital watermark and the third seam digital watermark all comprise digital watermark information.
In the method for generating digital watermarks of remote sensing images disclosed by the embodiment of the application, first seam digital watermarks of a left digital watermark type and a right digital watermark type are generated on two remote sensing images in a left-right position relationship, second seam digital watermarks of a top digital watermark type and a bottom digital watermark type are generated on two remote sensing images in a top-bottom position relationship, third seam digital watermarks of a four-corner digital watermark type are generated on four remote sensing images in a four-corner position relationship, and the first seam digital watermark, the second seam digital watermark and the third seam digital watermark all comprise digital watermark information.
According to the technical scheme, the first, second and third seam digital watermarks of the cross remote sensing image can be generated, the first, second and third seam digital watermarks reflect the position relation among the remote sensing images, the safety of the remote sensing image data is protected, and the integrity of batch data is guaranteed, so that the missing of individual remote sensing images can be intuitively reflected through the generated digital watermarks. The method for generating the digital watermark of the remote sensing image can reduce the information writing amount of the single digital watermark, the information of the single digital watermark only needs to be written into all the information of the digital watermark corresponding to the remote sensing image, and the digital watermark information of all the remote sensing images does not need to be written into all the information. Meanwhile, the cross-file straddling type digital watermark also has the advantages of small digital watermark covering in the aspect of browsing the remote sensing image, small influence on the original remote sensing image and the like because the digital watermark is positioned at the edge of a single remote sensing image, so that the method for generating the digital watermark of the remote sensing image can be better applied to the aspects of analyzing the remote sensing image and displaying the remote sensing electronic map.
Therefore, the method for generating the digital watermark of the remote sensing image can solve the problems that when the digital watermark is applied to the remote sensing images with large batch and position information, the information writing amount is large, and the position relation between the remote sensing images cannot be distinguished.
The embodiment of the application also discloses a system for generating the digital watermark of the remote sensing image, and the system for generating the digital watermark of the remote sensing image comprises the following components:
the remote sensing image reading module 100 reads a remote sensing image file, wherein the remote sensing image file comprises at least two adjacent remote sensing images;
the remote sensing image position relation judging module 200 is used for acquiring position relation information between at least two adjacent remote sensing images by the remote sensing image position relation judging module 200, wherein the position relation information comprises a left-right position relation, an upper-lower position relation and a four-corner position relation;
the digital watermark information setting module 300, the digital watermark information setting module 300 is used for setting the digital watermark information;
the digital watermark type setting module 400 is used for setting digital watermark types, wherein the digital watermark types comprise a left digital watermark type, a right digital watermark type, an upper digital watermark type, a lower digital watermark type and a four-corner digital watermark type;
the digital watermark generation module 500 is used for generating a first left-right digital watermark on two remote sensing images in a left-right position relationship, and/or generating a second upper-lower digital watermark on the two remote sensing images in an upper-lower position relationship, and/or generating a third four-corner digital watermark on four remote sensing images in a four-corner position relationship, wherein the first, second and third left-right digital watermarks all include digital watermark information.
In the digital watermark generation system for remote sensing images disclosed in the embodiment of the present application, the remote sensing image reading module 100 can read a remote sensing image file, the remote sensing image positional relationship determination module 200 can obtain positional relationship information between at least two adjacent remote sensing images, the digital watermark information setting module 300 can set digital watermark information, the digital watermark type setting module 400 can set a digital watermark type, the digital watermark generation module 500 can generate a first u-shaped digital watermark of a left-right digital watermark type on two remote sensing images of a left-right positional relationship, and/or generate a second u-shaped digital watermark of a top-bottom digital watermark type on two remote sensing images of a top-bottom positional relationship, and/or generate a third u-shaped digital watermark of a four-corner digital watermark type on four remote sensing images of a four-corner positional relationship, and the first u-shaped digital watermark, The second and third saddle-stitch digital watermarks both include digital watermark information.
According to the technical scheme, the first, second and third seam digital watermarks of the cross remote sensing image can be generated, the first, second and third seam digital watermarks reflect the position relation among the remote sensing images, the safety of the remote sensing image data is protected, and the integrity of batch data is guaranteed, so that the missing of individual remote sensing images can be intuitively reflected through the generated digital watermarks. The method for generating the digital watermark of the remote sensing image can reduce the information writing amount of the single digital watermark, the information of the single digital watermark only needs to be written into all the information of the digital watermark corresponding to the remote sensing image, and the digital watermark information of all the remote sensing images does not need to be written into all the information. Meanwhile, the cross-file straddling type digital watermark also has the advantages of small digital watermark covering in the aspect of browsing the remote sensing image, small influence on the original remote sensing image and the like because the digital watermark is positioned at the edge of a single remote sensing image, so that the method for generating the digital watermark of the remote sensing image can be better applied to the aspects of analyzing the remote sensing image and displaying the remote sensing electronic map.
Specifically, the remote sensing image position relation judgment module 200 may include a remote sensing image centroid distance calculation unit and a remote sensing image centroid connecting line azimuth calculation unit, wherein the remote sensing image centroid distance calculation unit calculates the centroid distance of the two remote sensing images, and the remote sensing image centroid connecting line azimuth calculation unit calculates the azimuth of the two remote sensing image centroid connecting lines;
under the condition that the centroid distance is a first distance and the azimuth angle is a first angle, the position relation information of the two remote sensing images is a left-right position relation;
under the condition that the centroid distance is a second distance and the azimuth angle is a second angle, the position relation information of the two remote sensing images is in an up-down position relation;
and under the condition that the centroid distance is a third distance and the azimuth angle is a third angle, the position relation information of the two remote sensing images is a four-corner position relation.
In the case where the remote sensing image is rectangular, the first distance may be
Where x1 is the width of the left image and x2 is the width of the right image, the first angle may be-45<a<45 degrees and the second distance may be
Wherein y1 is the height of the upper image, y2 is the height of the lower image, the second angle can be 45<a<135 degrees, the third distance can satisfy the first distance for the left and right sides, the second distance for the top and bottom, and the third angle satisfies the first angle for the left and right sides, the second angle for the top and bottom.
The scheme for judging the position relationship of the remote sensing image is simple and effective, and can simplify the algorithm setting of the remote sensing image position relationship judging module 200.
In an alternative embodiment, the digital watermark information may include at least one of a digital watermark position, a digital watermark margin, a digital watermark transparency, and a digital watermark rotation angle. Of course, the digital watermark information may all include the digital watermark position, the digital watermark margin, the digital watermark transparency, and the digital watermark rotation angle. The digital watermark is convenient to use for setting, the functions of the digital watermark generating system of the remote sensing image are increased, the functions of the digital watermark generating system of the remote sensing image are complete, and the user experience of the digital watermark generating system of the remote sensing image is improved.
In order to further increase the function of the digital watermark generating system of the remote sensing image, so that the function of the digital watermark generating system of the remote sensing image is relatively complete, in an optional embodiment, the digital watermark generating system of the remote sensing image may further include a file saving module, and the file saving module saves the remote sensing image processed by the digital watermark generating module 500 according to file saving information, where the file saving information includes whether to cover at least one of the original file, the file type, and the saving position.
Furthermore, the digital watermark generating system of the remote sensing image also comprises a file type judging module and a file type converting module; the file type judging module is used for judging whether the file type of the remote sensing image is the same as the specified file type; under the condition that the remote sensing image file type is the same as the specified file type, the remote sensing image reading module 100 reads the remote sensing image file; and under the condition that the remote sensing image file type is different from the specified file type, the file type conversion module converts the remote sensing image file type into the specified file type. The technical scheme can greatly facilitate the operation of a user, so that the file format adaptability of the digital watermark generating system of the remote sensing image is higher.
The embodiment of the application also discloses a control method of the digital watermark generating system of the remote sensing image, which is applied to the digital watermark generating system of the remote sensing image, and the disclosed control method comprises the following steps:
step 101, controlling a remote sensing image reading module 100 to read a remote sensing image file, wherein the remote sensing image file comprises at least two adjacent remote sensing images;
102, controlling a remote sensing image position relation judgment module 200 to acquire position relation information between at least two adjacent remote sensing images, wherein the position relation information comprises a left-right position relation, an upper-lower position relation and a four-corner position relation;
103, controlling the digital watermark information setting module 300 to set digital watermark information;
104, controlling a digital watermark type setting module 400 to set digital watermark types, wherein the digital watermark types comprise a left digital watermark type, a right digital watermark type, an upper digital watermark type, a lower digital watermark type and a four-corner digital watermark type;
and 105, controlling the digital watermark generating module 500 to generate a first left-right digital watermark on the two remote sensing images in the left-right position relationship, and/or generate a second upper-lower digital watermark on the two remote sensing images in the upper-lower position relationship, and/or generate a third four-corner digital watermark on the four remote sensing images in the four-corner position relationship, wherein the first left-right digital watermark, the second left-right digital watermark and the third left-right digital watermark all comprise digital watermark information.
Specifically, step 102 may include:
step 201, controlling a remote sensing image centroid distance calculation unit to calculate the centroid distances of two remote sensing images;
step 202, controlling a remote sensing image centroid connecting line azimuth angle calculation unit to calculate the azimuth angle of the two remote sensing image centroid connecting lines;
under the condition that the centroid distance is a first distance and the azimuth angle is a first angle, the position relation information of the two remote sensing images is a left-right position relation;
under the condition that the centroid distance is a second distance and the azimuth angle is a second angle, the position relation information of the two remote sensing images is in an up-down position relation;
and under the condition that the centroid distance is a third distance and the azimuth angle is a third angle, the position relation information of the two remote sensing images is a four-corner position relation.
In an optional embodiment, the digital watermark generating system for the remote sensing image further comprises a file type judging module and a file type converting module; the file type judging module is used for judging whether the file type of the remote sensing image is the same as the specified file type; under the condition that the remote sensing image file type is the same as the specified file type, the remote sensing image reading module 100 reads the remote sensing image file; in the case that the remote sensing image file type is different from the specified file type, the file type conversion module converts the remote sensing image file type into the specified file type, and before step 101, the control method may further include:
step 301, a control file type judgment module judges whether the remote sensing image file type is the same as the specified file type;
step 302, controlling the remote sensing image reading module 100 to read the remote sensing image file under the condition that the remote sensing image file type is the same as the specified file type;
step 303, under the condition that the remote sensing image file type is different from the specified file type, controlling the file type conversion module to convert the remote sensing image file type into the specified file type, and controlling the remote sensing image reading module 100 to read the remote sensing image file processed by the file type conversion module.
Further, the digital watermark generating system for remote sensing images further comprises a file saving module, the file saving module saves the remote sensing images processed by the digital watermark generating module 500 according to file saving information, and the control method further comprises:
step 401, controlling the file saving module to save the remote sensing image processed by the digital watermark generating module 500 according to file saving information, wherein the file saving information includes whether to cover at least one of the original file, the file type and the saving position.
The technical scheme can increase the functions of the digital watermark generating system of the remote sensing image, so that the functions of the digital watermark generating system of the remote sensing image are complete, the operation of a user is facilitated greatly, the file format adaptability of the digital watermark generating system of the remote sensing image is higher, and the user experience of the digital watermark generating system of the remote sensing image is improved.
In the embodiments of the present application, the difference between the embodiments is described in detail, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in view of brevity of the text.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A digital watermark generation method of a remote sensing image is characterized by comprising the following steps:
acquiring position relation information between at least two adjacent remote sensing images, wherein the position relation information comprises a left-right position relation, an upper-lower position relation and a four-corner position relation;
setting digital watermark types, wherein the digital watermark types comprise a left digital watermark type, a right digital watermark type, an upper digital watermark type, a lower digital watermark type and a four-corner digital watermark type;
setting digital watermark information;
and generating a first U-shaped digital watermark of a left-right digital watermark type on two remote sensing images in the left-right position relationship, and/or generating a second U-shaped digital watermark of an upper-lower digital watermark type on two remote sensing images in the upper-lower position relationship, and/or generating a third U-shaped digital watermark of a four-corner digital watermark type on four remote sensing images in the four-corner position relationship, wherein the first U-shaped digital watermark, the second U-shaped digital watermark and the third U-shaped digital watermark all comprise digital watermark information.
2. A system for generating a digital watermark for a remotely sensed image, comprising:
the remote sensing image reading module (100) reads a remote sensing image file, wherein the remote sensing image file comprises at least two adjacent remote sensing images;
the remote sensing image position relation judging module (200) is used for acquiring position relation information between the at least two adjacent remote sensing images, wherein the position relation information comprises a left-right position relation, an upper-lower position relation and a four-corner position relation;
the digital watermark information setting module (300), the digital watermark information setting module (300) is used for setting the digital watermark information;
the digital watermark type setting module (400), the digital watermark type setting module (400) is used for setting the digital watermark type, the digital watermark type includes a left and right digital watermark type, an upper and lower digital watermark type and a four-corner digital watermark type;
a digital watermark generating module (500), wherein the digital watermark generating module (500) is configured to generate a first u-shaped digital watermark of the left-right digital watermark type on two remote sensing images in the left-right positional relationship, and/or generate a second u-shaped digital watermark of the upper-lower digital watermark type on two remote sensing images in the upper-lower positional relationship, and/or generate a third u-shaped digital watermark of the four-corner digital watermark type on four remote sensing images in the four-corner positional relationship, and the first u-shaped digital watermark, the second u-shaped digital watermark, and the third u-shaped digital watermark all include the digital watermark information.
3. The system for generating digital watermarks of remote sensing images according to claim 2, wherein said module (200) for determining the positional relationship of remote sensing images comprises a unit for calculating the distance between the centroids of two remote sensing images and a unit for calculating the azimuth angle of the connecting line of the centroids of the remote sensing images, said unit for calculating the azimuth angle of the connecting line of the centroids of the two remote sensing images;
under the condition that the centroid distance is a first distance and the azimuth angle is a first angle, the position relation information of the two remote sensing images is the left-right position relation;
under the condition that the centroid distance is a second distance and the azimuth angle is a second angle, the position relation information of the two remote sensing images is the up-down position relation;
and under the condition that the centroid distance is a third distance and the azimuth angle is a third angle, the position relation information of the two remote sensing images is the four-corner position relation.
4. The system of claim 2, wherein the digital watermark information comprises at least one of a digital watermark location, a digital watermark margin, a digital watermark transparency, and a digital watermark rotation angle.
5. The digital watermark generation system for remote sensing images according to claim 2, further comprising a file saving module that saves the remote sensing image processed by the digital watermark generation module (500) according to file saving information including whether to cover at least one of an original file, a file type, and a saving location.
6. The digital watermark generation system for remote sensing images according to claim 2, further comprising a file type judgment module and a file type conversion module;
the file type judging module is used for judging whether the file type of the remote sensing image is the same as the specified file type;
under the condition that the remote sensing image file type is the same as the specified file type, the remote sensing image reading module (100) reads the remote sensing image file;
and under the condition that the remote sensing image file type is different from the specified file type, the file type conversion module converts the remote sensing image file type into the specified file type.
7. A control method of a digital watermark generation system for a remote sensing image, which is applied to the digital watermark generation system for a remote sensing image according to any one of claims 2 to 6, the control method comprising:
controlling the remote sensing image reading module (100) to read a remote sensing image file, wherein the remote sensing image file comprises at least two adjacent remote sensing images;
controlling the remote sensing image position relation judging module (200) to obtain position relation information between the at least two adjacent remote sensing images, wherein the position relation information comprises a left-right position relation, an upper-lower position relation and a four-corner position relation;
controlling the digital watermark information setting module (300) to set digital watermark information;
controlling the digital watermark type setting module (400) to set digital watermark types, wherein the digital watermark types comprise a left digital watermark type, a right digital watermark type, an upper digital watermark type, a lower digital watermark type and a four-corner digital watermark type;
and controlling the digital watermark generation module (500) to generate a first U-shaped digital watermark of the left and right digital watermark types on two remote sensing images in the left and right position relationship, and/or generating a second U-shaped digital watermark of the upper and lower digital watermark types on two remote sensing images in the upper and lower position relationship, and/or generating a third U-shaped digital watermark of the four-corner digital watermark type on four remote sensing images in the four-corner position relationship, wherein the first U-shaped digital watermark, the second U-shaped digital watermark and the third U-shaped digital watermark all comprise the digital watermark information.
8. The method for controlling a digital watermark generation system for remote sensing images according to claim 7, wherein the step of controlling the remote sensing image positional relationship determination module (200) to acquire the positional relationship information between the at least two adjacent remote sensing images comprises:
controlling the remote sensing image centroid distance calculation unit to calculate the centroid distances of the two remote sensing images;
controlling the remote sensing image centroid connecting line azimuth angle calculation unit to calculate the azimuth angle of the two remote sensing image centroid connecting lines;
under the condition that the centroid distance is a first distance and the azimuth angle is a first angle, the position relation information of the two remote sensing images is the left-right position relation;
under the condition that the centroid distance is a second distance and the azimuth angle is a second angle, the position relation information of the two remote sensing images is the up-down position relation;
and under the condition that the centroid distance is a third distance and the azimuth angle is a third angle, the position relation information of the two remote sensing images is the four-corner position relation.
9. The method for controlling a digital watermark generation system for remote sensing images according to claim 7, wherein the digital watermark generation system for remote sensing images further comprises a file type judgment module and a file type conversion module; the file type judging module is used for judging whether the file type of the remote sensing image is the same as the specified file type; under the condition that the remote sensing image file type is the same as the specified file type, the remote sensing image reading module (100) reads the remote sensing image file; under the condition that the remote sensing image file type is different from the specified file type, the file type conversion module converts the remote sensing image file type into the specified file type, and before the step of controlling the remote sensing image reading module (100) to read the remote sensing image file, the control method further comprises the following steps:
controlling the file type judging module to judge whether the file type of the remote sensing image is the same as the specified file type;
under the condition that the remote sensing image file type is the same as the specified file type, controlling the remote sensing image reading module (100) to read the remote sensing image file;
and under the condition that the remote sensing image file type is different from the specified file type, controlling the file type conversion module to convert the remote sensing image file type into the specified file type, and controlling the remote sensing image reading module (100) to read the remote sensing image file processed by the file type conversion module.
10. The method for controlling a digital watermark generation system for remote sensing images according to claim 7, wherein the digital watermark generation system for remote sensing images further comprises a file saving module, the file saving module saves the remote sensing images processed by the digital watermark generation module (500) according to file saving information, and the method further comprises:
and controlling the file storage module to store the remote sensing image processed by the digital watermark generation module (500) according to file storage information, wherein the file storage information comprises whether at least one of an original file, a file type and a storage position is covered.
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