JP2000231571A - Isar image retrieving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an ISAR image retrieving device for quickening an image identifying work and for reducing the error of image identification due to the individual difference of an operator at the time of retrieving an image by retriev ing a data base in which plural identification candidate images are stored based on the number of pixels of a featured object in a binary image, and outputting an identification candidate ISAR image based on the retrieved result. SOLUTION: An image thresholding circuit 1 separates the strength of radar reflected waves by a prescribed threshold. Thus, an ISAR image to be identified can be converted into a black and white image. A number of pixel detecting circuit 2 calculates the total number of pixels of a featured object such as a ship in the ISAR image to be identified which is converted into the black and white image, and outputs the obtained number of pixels. A number of pixel judging circuit 3 retrieves identification candidate data from an identification candidate data base 4 by using the number of pixels indicating the featured object detected by the number of pixel detecting circuit 2 as a key, and outputs the applicable identification candidate ISAR image as an identification candidate image.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image retrieval apparatus, and more particularly to an ISAR image retrieval apparatus for retrieving an identification candidate ISAR image from a database and identifying the image.

[0002]

2. Description of the Related Art Conventionally, various image identification devices have been developed. For example, FIG. 11 shows a conventional identification candidate IS
AR (Inverse Synthetic Aper)
FIG. 2 is a block diagram illustrating a configuration of a main part of a search Radar (inverse synthetic aperture radar) image database search device.
As shown in FIG. 1, this device includes an identification candidate database 4 and an identification candidate display circuit 10.

In the above-mentioned conventional apparatus, an identification target ISAR image is displayed on a display (not shown), and an operator operates an identification candidate display circuit 10 to display an identification candidate ISAR image from the identification candidate database 4 on this display. To be displayed. As a result, the identification target ISAR image and the identification candidate ISAR image are both displayed on the screen.

[0004] Therefore, the operator needs to identify these identification objects I.
The SAR image and the identification candidate ISAR image are visually compared. The operation for this comparison is performed between the identification candidate ISAR image stored in the identification candidate database 4 and the identification target I
This process is repeated until all the SAR images are compared with each other, or until an identification candidate ISAR image determined to be coincident by the operator is found.

[0005]

However, in the above-described conventional identification candidate ISAR image database search apparatus, the operator can identify the identification candidate I from the identification candidate database.
The SAR image must be selected, and when the number and data amount of the ISAR images stored in the identification candidate database increase, there is a problem that the selection takes time.

Further, in the above-mentioned conventional identification candidate ISAR image database search apparatus, since the operator himself / herself visually judges whether or not the identification target ISAR image and the identification candidate ISAR image match, the image identification based on individual differences is performed. There is also a problem that a judgment error occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to search for an identification candidate ISAR image from an identification candidate database, to speed up image identification work, and to improve image identification. ISA that can reduce errors in image identification due to individual differences in operators
An R image search device is provided.

[0008]

In order to achieve the above object, the present invention provides a means for converting an identification target ISAR image into a binary image, and a method for determining the number of pixels of a feature in the binary image. An ISAR image search device comprising: a calculating unit; a unit that searches a database in which a plurality of identification candidate images are stored based on the number of pixels; and a unit that outputs an identification candidate ISAR image based on the search result. provide.

The ISAR image retrieval apparatus provided by the present invention further comprises means for dividing the binary image into a plurality of partial images, and means for extracting an image matching the number of pixels from the identification candidate ISAR image. Wherein the number-of-pixels calculating means obtains the number of pixels of the plurality of partial images.

Further, the present invention provides means for converting an identification target ISAR image into a pseudo color image, pixel number calculation means for obtaining the number of pixels of a feature in the pseudo color image, and There is provided an ISAR image search device including means for searching a database in which a plurality of identification candidate images are stored, and means for outputting an identification candidate ISAR image based on the search result.

The ISAR image retrieval apparatus provided by the present invention further comprises means for dividing the pseudo color image into a plurality of partial images, and means for extracting an image matching the number of pixels from the identification candidate ISAR image. Wherein the number-of-pixels calculating means obtains the number of pixels for each color of the pseudo-color image for the plurality of partial images.

Further, the present invention provides a means for converting an ISAR image to be identified into a binary image, a pixel distribution detecting means for detecting a pixel distribution of the binary image, and a pixel distribution based on the pixel distribution.
There is provided an ISAR image search device including means for searching a database in which a plurality of identification candidate images are stored, and means for outputting an identification candidate ISAR image based on the search result.

The ISAR image retrieval apparatus provided by the present invention further comprises means for dividing the binary image into a plurality of partial images, and means for extracting an image matching the number of pixels from the identification candidate ISAR image. And the pixel distribution detecting means detects a pixel distribution of the plurality of partial images.

Further, the present invention provides a means for converting an identification target ISAR image into a pseudo color image, a pixel distribution detecting means for detecting a pixel distribution of the pseudo color image, and a plurality of identification based on the pixel distribution. There is provided an ISAR image search device including means for searching a database in which candidate images are stored, and means for outputting an identification candidate ISAR image based on the search result.

The ISAR image retrieval apparatus according to the present invention further comprises means for dividing the pseudo color image into a plurality of partial images, and an image having the same number of pixels as the identification target ISAR image among the identification candidate ISAR images. And a pixel distribution detecting unit that obtains a pixel distribution for each of the colors of the pseudo color image for the plurality of partial images.

Further, the present invention provides a means for converting an identification target ISAR image into a binary image, a means for dividing the binary image into a plurality of partial images, and a pixel number for obtaining the number of pixels of the plurality of partial images. A calculating means, a pixel distribution detecting means for detecting a pixel distribution of the plurality of partial images, a first searching means for searching a database storing a plurality of identification candidate images based on the number of pixels, A second search unit for searching the database storing a plurality of identification candidate images based on the pixel distribution; and an identification candidate ISAR image based on search results obtained by the first and second search units. The present invention provides an ISAR image retrieval apparatus comprising: a means for extracting an image corresponding to the number of pixels from the identification candidate ISAR image.

The present invention provides a means for converting an identification target ISAR image into a pseudo color image, a means for dividing the pseudo color image into a plurality of partial images, and the color of the pseudo color image for the plurality of partial images. A pixel number calculating means for calculating a pixel number for each of the plurality of partial images; a pixel distribution detecting means for detecting a pixel distribution for each of the colors of the pseudo color image for the plurality of partial images; and a plurality of identification candidate images based on the number of pixels. First search means for searching a database in which is stored;
A second search unit that searches the database storing a plurality of identification candidate images based on the pixel distribution, and outputs an identification candidate ISAR image based on search results obtained by the first and second search units. Means for identifying, and the identification candidate I
Means for extracting an image corresponding to the number of pixels from the SAR image.

[0018]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Embodiment 1 FIG. First, Embodiment 1 of the present invention will be described. FIG. 1 shows an ISA according to Embodiment 1 of the present invention.
FIG. 2 is a block diagram illustrating a main configuration of an R image search device (hereinafter, simply referred to as a device). As shown in FIG.
It comprises an image binarization circuit 1, a pixel number detection circuit 2, a pixel number determination circuit 3, and an identification candidate database 4. The ISAR image search device according to the present embodiment sets an image obtained by using a synthetic aperture radar (not shown) as an ISAR image to be identified.

Next, a specific operation of the present apparatus will be described. Identification target ISAR input to image binarization circuit 1
For the image, the image binarization circuit 1 separates the strength of the radar reflected wave by a predetermined threshold. By this processing, the identification target ISAR image is converted into a black and white image. The pixel number detection circuit 2 at the next stage calculates the total number of pixels of a feature such as a ship in the identification target ISAR image converted into the black and white image in this way, and outputs the obtained number of pixels.

The pixel number determination circuit 3 searches the identification candidate database 4 for identification candidate data using the number of pixels indicating the feature detected by the pixel number detection circuit 2 as a key. If there is, it is output as an identification candidate image. By this processing, the identification candidate ISAR image is extracted from the identification candidate database 4.

The identification candidate database 4 stores identification candidate data (identification candidate ISAR images) for each of a plurality of types of objects based on the number of pixels. The number of pixels of the object is used as a key to collate with the identification candidate data of the ISAR image stored in the identification candidate database 4 in advance.

As described above, the apparatus according to the present embodiment
Utilizing that the size and the like of the object is uniquely determined only by the number of pixels of the feature in the identification target ISAR image, a parameter such as the size of the object is used as a search key.

As described above, according to the present embodiment, after binarizing an image to be identified, the total number of pixels of a feature in the image is calculated, and a database is calculated from the obtained number of pixels. Matching and detecting identification candidate data from inside, that is,
Using parameters such as the size of this object as search keys,
By configuring to search for the identification candidate data in the database, identification candidates can be easily selected and the identification processing time can be shortened.

Embodiment 2 FIG. Hereinafter, Embodiment 2 of the present invention will be described. FIG. 2 shows the IS according to the present embodiment.
FIG. 2 is a block diagram illustrating a main configuration of an AR image search device (hereinafter, referred to as a device). In the device shown in FIG.
The same components as those of the apparatus according to the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

In the apparatus according to the first embodiment, the image 2
The pixel number detection circuit 2 detects the number of pixels indicating a feature from the identification target ISAR image converted into a monochrome image by the value conversion circuit 1. In the device according to the present embodiment, as shown in FIG. 2, an image dividing circuit 5 is inserted before the pixel number detecting circuit 2, and an identification candidate selecting circuit 6 is provided after the pixel number determining circuit 3. Take the configuration.

The image dividing circuit 5 inserted before the pixel number detecting circuit 2 is used for identifying the ISAR from the image binarizing circuit 1.
After the outline of the image is extracted, one image is divided into a plurality of partial images. The division here is a process of cutting out a part (for example, a unit of several tens of pixels) of the object from which the contour has been extracted (edge detected), and the next pixel number detection circuit 2 determines the number of pixels of the partial image. Count.

After the number of pixels of each of the divided partial images is detected by the pixel number detection circuit 2, the pixel number determination circuit 3 identifies the detected number of pixels indicating the feature of each partial image as a key. The candidate database 4 is searched for candidate identification data. That is, the pixel number determination circuit 3 of the device according to the present embodiment selects an identification candidate for each divided partial image.

Then, the identification candidate selection circuit 6 inserted after the pixel number determination circuit 3 selects, from among the plurality of identification candidate images listed by the pixel number determination circuit 3, an image whose pixel number matches the identification target image. And outputs it as an identification candidate image.

As described above, according to the present embodiment, after the edge of the image to be identified is detected, the image to be identified is divided, and a plurality of classifications are performed using the number of pixels as a key for each divided portion. By retrieving the identification candidate data from the candidate images, an image having the same number of pixels as the identification target image can be extracted, and the retrieval accuracy of the identification candidate ISAR image can be improved.

Embodiment 3 Hereinafter, Embodiment 3 of the present invention will be described. FIG. 3 shows the IS according to the present embodiment.
FIG. 2 is a block diagram illustrating a main configuration of an AR image search device (hereinafter, referred to as a device). In the device shown in FIG.
The same components as those of the apparatus according to the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

The apparatus according to the present embodiment is an apparatus for outputting a black-and-white binary image according to the first embodiment shown in FIG.
As shown in FIG. 3, an image pseudo-coloring circuit 7 is provided in place of the value converting circuit 1. This image pseudo-coloring circuit 7
Is a circuit for pseudo-coloring an ISAR image based on the strength of radar reflected waves.For example, it uses the same colorization technology as that used in thermography and the like for pseudo-coloring an image depending on the temperature of an object. ing.

Therefore, in the present apparatus, by inputting the pseudo-colored ISAR image to the pixel number detection circuit 2, the number of pixels indicating a characteristic object such as a ship in the identification target ISAR image can be calculated. Detection is performed for each of the pseudo-colored colors. Then, the pixel number determination circuit 3 searches the identification candidate database 4 for identification candidate data using the number of pixels indicating the feature of each color converted into a pseudo color as a key.

It should be noted that the pseudo colorization can be performed using any of the absolute value and the relative value of the physical quantity to be handled. For example, as a method based on relative values, there is a method in which the maximum value of radar wave reflection on an object is set to 1, and an ISAR image is pseudo-colored based on a comparison with the maximum value. Therefore, when the method using such a relative value is adopted,
Constant pseudo colorization can be performed without being affected by the environment where the target object exists.

As described above, in the present embodiment, the number of pixels indicating the feature in the pseudo-colored ISAR image is detected for each pseudo-colored color, and the identification candidate is determined based on the color distribution. Since the identification candidate data is searched from the database, it is possible to search for the identification candidate ISAR image with higher accuracy.

Embodiment 4 FIG. Hereinafter, Embodiment 4 of the present invention will be described. FIG. 4 shows the IS according to the present embodiment.
FIG. 2 is a block diagram illustrating a main configuration of an AR image search device (hereinafter, referred to as a device). The device shown in FIG.
It has a configuration in which the image binarization circuit 1 is replaced with an image pseudo-color conversion circuit 7 among the components of the device according to the second embodiment.

In other words, the device according to this embodiment is
The pixel number detection circuit 2 according to the third embodiment shown in FIG.
, An image dividing circuit 5 is inserted in the preceding stage, and an identification candidate selecting circuit 6 is inserted in the subsequent stage of the pixel number determining circuit 3.

That is, in the apparatus according to the present embodiment,
The ISAR image that has been pseudo-colored by the image pseudo-coloring circuit 7 is divided into a plurality of partial images by the image dividing circuit 5 at the next stage. Then, as in the second embodiment, by extracting an image having the same number of pixels as the identification target image from the plurality of identification candidate images, the number of pixels of each of the divided partial images is pseudo-colored as a result. Detected for each color.

As described above, the present apparatus uses the number of pixels indicating the feature of each partial image and the number of pixels indicating the feature of each pseudo-colored color as keys to identify the identification candidate from the identification candidate database 4. The data is searched, and an image having the same number of pixels as the identification target image is extracted from the plurality of identification candidate images.

As described above, according to the present embodiment, the number of pixels indicating the feature of each divided partial image and the number of pixels indicating the feature of each pseudo-colored color are used as keys, that is, By detecting the number of pixels of each divided partial image for each pseudo-colored color and searching for the identification candidate data from the identification candidate database, the search accuracy of the identification candidate ISAR image can be improved.

Embodiment 5 Hereinafter, a fifth embodiment of the present invention will be described. FIG. 5 is a block diagram showing a main configuration of an ISAR image search device (hereinafter, referred to as a device) according to Embodiment 5 of the present invention. As shown in FIG. 1, the present apparatus includes an image binarization circuit 1, a pixel distribution detection circuit 8, a pixel distribution determination circuit 9, and an identification candidate database 4. The ISAR image retrieval device according to the present embodiment also uses an image obtained by using a synthetic aperture radar (not shown) as an identification target ISAR image, similarly to the above embodiments.

As shown in FIG. 5, in the apparatus according to the present embodiment, the pixel distribution detecting circuit 8 corresponding to the pixel number detecting circuit 2 according to the first embodiment is replaced with the image distribution detecting circuit 8.
Discrimination target IS converted into a black-and-white binary image by the binarization circuit 1
The distribution of pixels in the AR image is detected. Similarly, a pixel distribution determining circuit 9 corresponding to the one replaced with the pixel number determining circuit 3 searches the identification candidate database 4 using the detected pixel distribution as a key.

The pixel distribution detection circuit 8 detects the distribution of pixels in the ISAR image by using a known technique such as pattern matching using an image filter. In the synthetic aperture radar, the obtained pixel distribution is a set of pixels indicating the reflection points, and the object can be classified according to the position of the strong reflection point in the pixels. As a result, the pixel distribution determination circuit 9 makes the identification candidate database 4
Can be searched.

As described above, in this embodiment, after detecting the distribution of pixels in the identification target ISAR image converted into the binarized image, the pixel distribution determination circuit uses the pixel distribution in the image as a key. By retrieving the identification candidate data from the identification candidate database, the retrieval accuracy of the identification candidate ISAR image can be improved.

Embodiment 6 FIG. Hereinafter, Embodiment 6 of the present invention will be described. FIG. 6 shows the IS according to the present embodiment.
FIG. 2 is a block diagram illustrating a main configuration of an AR image search device (hereinafter, referred to as a device). In the device shown in FIG.
The same components as those of the device according to the fifth embodiment shown in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted.

In the apparatus according to the present embodiment, as shown in FIG. 6, an image dividing circuit 5 is inserted before a pixel distribution detecting circuit 8, and an identification candidate selecting circuit 6 is inserted after a pixel distribution determining circuit 9. Is adopted.

The newly inserted image dividing circuit 5 is similar to the second embodiment, and the identification target I from the image binarizing circuit 1 is
After the outline of the SAR image is extracted, one image is divided into a plurality of partial images (the division here is also a process of cutting out a part of the object whose outline has been extracted (edge detected)), and The pixel distribution detection circuit 8 detects a pixel distribution for each of the divided partial images.

Then, the pixel distribution determination circuit 9 searches the identification candidate database 4 for identification candidate data using the pixel distribution of each divided partial image as a key. As a result, an image having the same number of pixels as the identification target image is extracted from the plurality of identification candidate images. That is, the pixel distribution determination circuit 9 according to the present embodiment selects an identification candidate for each of the divided partial images and outputs it as an identification candidate image.

As described above, according to the present embodiment, after edge detection of an image to be identified is performed, the image to be identified is divided, and a candidate pixel for each divided partial image is used as a key. By retrieving the identification candidate data from the database, the retrieval accuracy of the identification candidate ISAR image can be improved.

Embodiment 7 FIG. Hereinafter, a seventh embodiment of the present invention will be described. FIG. 7 shows the IS according to the present embodiment.
FIG. 2 is a block diagram illustrating a main configuration of an AR image search device (hereinafter, referred to as a device). In the device shown in FIG.
The same components as those of the device according to the fifth embodiment shown in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 7, the apparatus according to the present embodiment is different from the apparatus according to the fifth embodiment shown in FIG.
And the ISAR image is pseudo-colored according to the strength of the radar reflected wave. Then, in the pixel distribution detection circuit 8,
The pixel distribution in the image is detected for each of the pseudo-colored colors.

Thereafter, the pixel distribution determination circuit 9 searches the identification candidate database 4 for identification candidate data by using the pixel distribution of each pseudo-colored color as a key, and outputs an identification candidate image. The color conversion technique used in the image pseudo-color conversion circuit 7 is the same as that described in the third embodiment, and a description thereof will be omitted.

As described above, according to the present embodiment, the identification candidate data is searched from the identification candidate database based on the pixel distribution corresponding to the color, using the pixel distribution for each color that has been pseudo-colored as a key. Therefore, it is possible to search for the identification candidate ISAR image with higher accuracy.

Embodiment 8 FIG. Hereinafter, an eighth embodiment of the present invention will be described. FIG. 8 shows the IS according to the present embodiment.
FIG. 2 is a block diagram illustrating a main configuration of an AR image search device (hereinafter, referred to as a device). The device shown in FIG.
It has a configuration in which the image binarizing circuit 1 is replaced with an image pseudo-coloring circuit 7 among the components of the device according to the sixth embodiment.

In order to view the present apparatus from another viewpoint, the present apparatus will be compared with the apparatus according to the seventh embodiment shown in FIG. That is, in the present apparatus, the image dividing circuit 5 is inserted before the pixel distribution detecting circuit 8 in the apparatus according to the seventh embodiment, thereby dividing one image into a plurality of partial images. By inserting the identification candidate selection circuit 6 at the subsequent stage of the pixel distribution determination circuit 9, an image having the same number of pixels as the identification target image is extracted from the plurality of identification candidate images.

The image pseudo-coloring circuit 7 obtains a pseudo-colored ISAR image in the same manner as in the above-described embodiment, divides the image in the next-stage image dividing circuit 5, A pixel distribution for each image and a pixel distribution for each pseudo-colored color are detected.

The pixel distribution determining circuit 9 searches the identification candidate database 4 for identification candidate data using the pixel distribution for each of the divided partial images and the pixel distribution for each pseudo-colored color as keys. As a result, an image having the same number of pixels as the identification target image is extracted from the plurality of identification candidate images.

As described above, according to the apparatus of the present embodiment, identification candidate data is extracted from the identification candidate database using the pixel distribution for each divided partial image and the pixel distribution for each pseudo-colored color as keys. By employing a search configuration, there is an effect that the search accuracy of the identification candidate ISAR image can be improved.

Embodiment 9 FIG. Hereinafter, a ninth embodiment of the present invention will be described. FIG. 9 shows an IS according to the present embodiment.
FIG. 2 is a block diagram illustrating a main configuration of an AR image search device (hereinafter, referred to as a device). The device shown in FIG.
The apparatus according to the second embodiment has a configuration in which the following elements are added. Therefore, in FIGS. 2 and 9, the same components are denoted by the same reference numerals, and description thereof is omitted here.

As shown in FIG. 9, the apparatus according to the present embodiment detects the distribution of pixels in an image at a stage preceding the identification candidate selection circuit 6 of the apparatus according to the second embodiment shown in FIG. And a pixel distribution determination circuit 9 for searching the identification candidate database 4 in which the identification candidate ISAR images are stored, using the pixel distribution in the identification target ISAR image as a key.

Therefore, similarly to the apparatus according to the second embodiment, the ISAR image to be identified is divided into a plurality of partial images by the image dividing circuit 5, and the number of pixels for each partial image obtained by the division is used as a pixel number detecting circuit. After the detection in step 2, the pixel number determination circuit 3 searches the identification candidate database 4 for identification candidate data using the number of pixels indicating the feature of each partial image as a key.

Further, after detecting the pixel distribution for each of the divided partial images, the pixel distribution determining circuit 9 again searches the identification candidate database 4 for identification candidate data using the pixel distribution for each of the partial images as a key. I do. As a result, the last-stage identification candidate selection circuit 6 extracts an image having the same number of pixels as the identification target image from the plurality of identification candidate images, and outputs a predetermined identification candidate image.

As described above, according to the present embodiment, for each part obtained by dividing the image to be identified, the identification candidate data is searched from a plurality of identification candidate images using the number of pixels as a key.
After extracting an image having the same number of pixels as the image to be identified and detecting the distribution of pixels in the ISAR image to be identified, searching for the identification candidate data from the identification candidate database using the pixel distribution in the image as a key. By doing so, the search accuracy of the identification candidate ISAR image can be further improved.

Embodiment 10 FIG. Hereinafter, a tenth embodiment of the present invention will be described. FIG. 10 is a block diagram showing a main configuration of an ISAR image search device (hereinafter, referred to as an apparatus) according to the present embodiment. The device shown in the figure has a configuration in which the image binarizing circuit 1 is replaced by an image pseudo-coloring circuit 7 in the device according to the ninth embodiment shown in FIG. Therefore, the other components are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 10, in the apparatus according to the present embodiment, an image pseudo-coloring circuit 7 pseudo-colors an ISAR image according to the intensity of a radar reflected wave, and a pixel number detection circuit 2 generates an image division circuit. In step 5, the number of pixels for each of the divided partial images and the number of pixels for each of the pseudo-colored colors are detected. In the identification candidate database 4, the pixel number determination circuit 3 uses the number of pixels indicating the feature of each partial image detected by the pixel number detection circuit 2 and the number of pixels of each pseudo-colored color as keys. To search for the identification candidate data.

Thereafter, the pixel distribution detecting circuit 8 detects the pixel distribution for each of the divided partial images and the pixel distribution for each of the pseudo-colored colors, and the pixel distribution determining circuit 9 determines the pixel distribution for each of the divided partial images. The identification candidate data is again searched from the identification candidate database 4 using the pixel distribution of (1) and the pixel distribution of each pseudo-colored color as keys. as a result,
The identification candidate selection circuit 6 extracts an image having the same number of pixels as the identification target image from the plurality of identification candidate images, and outputs an identification candidate image.

According to the present embodiment, as described above, the pixel distribution for each of the divided partial images and the pixel distribution for each of the pseudo-colored colors are detected, and the pixel distribution for each of the divided partial images is detected. By using the pixel distribution of each color converted into a pseudo color as a key, the identification candidate data is searched from the identification candidate database, so that the identification candidate ISAR
Image retrieval accuracy can be improved.

[0067]

As described above, the IS according to the present invention is
According to the AR image search device, the identification target ISAR image is
Means for converting to a value image, pixel number calculating means for calculating the number of pixels of the feature in the binary image, and
By providing a means for searching a database storing a plurality of identification candidate images and a means for outputting an identification candidate ISAR image based on the search result, the number of ISAR images stored in the identification candidate database increases. Also, the selection of the identification candidate image becomes easy, and the identification processing time can be reduced.

The ISAR image retrieval apparatus according to the present invention further comprises means for dividing the binary image into a plurality of partial images, and means for extracting an image matching the number of pixels from the identification candidate ISAR image. The pixel number calculation means obtains the number of pixels of the plurality of partial images, thereby extracting an image having the same number of pixels as the identification target image, thereby improving the search accuracy of the identification candidate ISAR image. The burden on the operator is reduced.

Further, the ISAR image retrieval apparatus according to the present invention comprises a means for converting an ISAR image to be identified into a pseudo color image, a pixel number calculating means for calculating the number of pixels of a feature in the pseudo color image, Means for searching a database storing a plurality of identification candidate images based on the number,
Means for outputting an identification candidate ISAR image based on the search result, thereby providing a more accurate identification candidate ISAR.
AR images can be searched.

The ISAR image retrieval apparatus according to the present invention further comprises means for dividing the pseudo color image into a plurality of partial images, and means for extracting an image matching the number of pixels from the identification candidate ISAR image. The number-of-pixels calculating means obtains the number of pixels for each color of the pseudo-color image for the plurality of partial images, so that the search accuracy of the identification candidate ISAR image can be increased, and the burden on the operator can be reduced.

Further, the ISAR image retrieval apparatus according to the present invention comprises means for converting an ISAR image to be identified into a binary image, a pixel distribution detecting means for detecting a pixel distribution of the binary image, and And means for searching a database in which a plurality of identification candidate images are stored, and means for outputting the identification candidate ISAR image based on the search result, thereby improving the search accuracy of the identification candidate ISAR image. It becomes possible.

The ISAR image retrieval apparatus provided by the present invention further comprises means for dividing the binary image into a plurality of partial images, and means for extracting an image matching the number of pixels from the identification candidate ISAR image. Since the pixel distribution detecting means detects the pixel distribution of the plurality of partial images, it is possible to enhance the search accuracy of the identification candidate ISAR image and reduce the error in image identification due to individual differences among operators. .

Further, the ISAR image retrieval apparatus according to the present invention includes a means for converting an identification target ISAR image into a pseudo color image, a pixel distribution detecting means for detecting a pixel distribution of the pseudo color image, and a method for detecting the pixel distribution. And a means for searching a database in which a plurality of identification candidate images are stored, and a means for outputting an identification candidate ISAR image based on the search result.
You can search for R images.

The ISAR image retrieval apparatus according to the present invention further comprises means for dividing the pseudo color image into a plurality of partial images, and an image having the same number of pixels as the identification target ISAR image among the identification candidate ISAR images. The pixel distribution detecting means obtains a pixel distribution for each color of the pseudo color image for the plurality of partial images, so that the search accuracy of the identification candidate ISAR image is increased and the burden on the operator is reduced. can do.

The present invention also provides a means for converting an ISAR image to be identified into a binary image, a means for dividing the binary image into a plurality of partial images, and a pixel number for obtaining the number of pixels of the plurality of partial images. A calculating means, a pixel distribution detecting means for detecting a pixel distribution of the plurality of partial images, a first searching means for searching a database storing a plurality of identification candidate images based on the number of pixels, A second search unit for searching the database storing a plurality of identification candidate images based on the pixel distribution; and an identification candidate ISAR image based on search results obtained by the first and second search units. Means for extracting an image corresponding to the number of pixels from the identification candidate ISAR image.
The search accuracy of the AR image can be improved.

Also, the ISAR image retrieval apparatus according to the present invention comprises means for converting an ISAR image to be identified into a pseudo color image, means for dividing the pseudo color image into a plurality of partial images, A pixel number calculation unit that calculates the number of pixels for each color of the pseudo color image, a pixel distribution detection unit that detects a pixel distribution for each color of the pseudo color image for the plurality of partial images, and First search means for searching a database in which a plurality of identification candidate images are stored, and second search means for searching the database in which a plurality of identification candidate images are stored based on the pixel distribution; Means for outputting an identification candidate ISAR image based on a search result by the first and second search means; and an image matching the number of pixels from the identification candidate ISAR image Because and means for extracting, enhance retrieval accuracy of the identification candidate ISAR image allows error reduction of the image identification by individual differences of the operators.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a main configuration of an ISAR image search device according to Embodiment 1 of the present invention.

FIG. 2 is a block diagram illustrating a main configuration of an ISAR image search device according to a second embodiment of the present invention.

FIG. 3 is a block diagram illustrating a main configuration of an ISAR image search device according to Embodiment 3 of the present invention;

FIG. 4 is a block diagram showing a main configuration of an ISAR image search device according to Embodiment 4 of the present invention.

FIG. 5 is a block diagram showing a main configuration of an ISAR image search device according to Embodiment 5 of the present invention.

FIG. 6 is a block diagram showing a main configuration of an ISAR image search device according to Embodiment 6 of the present invention.

FIG. 7 is a block diagram illustrating a main configuration of an ISAR image search device according to a seventh embodiment of the present invention.

FIG. 8 is a block diagram showing a main configuration of an ISAR image search device according to Embodiment 8 of the present invention.

FIG. 9 is a block diagram showing a main configuration of an ISAR image search device according to Embodiment 9 of the present invention.

FIG. 10 is a block diagram showing a main configuration of an ISAR image search device according to Embodiment 10 of the present invention.

FIG. 11 is a block diagram showing a configuration of a conventional ISAR image database search device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Image binarization circuit, 2 ... Pixel number detection circuit, 3 ... Pixel number determination circuit, 4 ... Identification candidate database, 5 ... Image division circuit, 6 ... Identification candidate selection circuit, 7 ... Image pseudo color conversion circuit, 8 ... Pixel distribution detection circuit, 9 ... Pixel distribution determination circuit, 1
0 ... Identification candidate display circuit

Claims (10)

[Claims] 1. An identification target ISAR (Inverse S)
means for converting an image (ynthetic Aperture Radar) image into a binary image; a pixel number calculating means for calculating the number of pixels of a feature in the binary image; and a plurality of identification candidate images stored based on the number of pixels. An ISAR image search apparatus comprising: means for searching a database; and means for outputting an identification candidate ISAR image based on the search result. 2. The image processing apparatus according to claim 1, further comprising: means for dividing the binary image into a plurality of partial images; and means for extracting an image corresponding to the number of pixels from the identification candidate ISAR image. 2. The ISAR image search device according to claim 1, wherein the number of pixels of the plurality of partial images is obtained. 3. An identification target ISAR (Inverse S)
means for converting an image (artificial Aperture Radar) image into a pseudo color image; a pixel number calculating means for calculating the number of pixels of a feature in the pseudo color image; and a plurality of identification candidate images stored based on the number of pixels. An ISAR image search apparatus comprising: means for searching a database; and means for outputting an identification candidate ISAR image based on the search result. 4. The apparatus according to claim 1, further comprising: means for dividing the pseudo color image into a plurality of partial images; and means for extracting an image corresponding to the number of pixels from the identification candidate ISAR image. 4. The ISAR image search device according to claim 3, wherein the number of pixels for each of the plurality of partial images is determined for each color of the pseudo color image. 5. An identification target ISAR (Inverse S)
means for converting an image (yntheticAperture Radar) image into a binary image; a pixel distribution detecting means for detecting a pixel distribution of the binary image; and a database storing a plurality of identification candidate images based on the pixel distribution. An ISAR image retrieval apparatus, comprising: means for outputting an identification candidate ISAR image based on the retrieval result. 6. The pixel distribution detecting means further comprising: means for dividing the binary image into a plurality of partial images; and means for extracting an image corresponding to the number of pixels from the identification candidate ISAR image. Detecting the pixel distribution of the plurality of partial images.
Image search device. 7. An identification target ISAR (Inverse S)
means for converting a synthetic color image into a pseudo-color image, a pixel distribution detecting means for detecting a pixel distribution of the pseudo-color image, and searching a database storing a plurality of identification candidate images based on the pixel distribution. An ISAR image retrieval apparatus, comprising: means for outputting an identification candidate ISAR image based on the retrieval result. 8. A means for dividing the pseudo color image into a plurality of partial images; and the identification target ISA from the identification candidate ISAR images.
8. A means for extracting an image having the same number of pixels as the R image, wherein the pixel distribution detecting means obtains a pixel distribution for each color of the pseudo color image for the plurality of partial images. ISAR image search device as described. 9. An identification target ISAR (Inverse S)
means for converting an image (ynthetic Aperture Radar) image into a binary image; means for dividing the binary image into a plurality of partial images; pixel number calculating means for calculating the number of pixels of the plurality of partial images; A pixel distribution detecting means for detecting a pixel distribution of the first; a first searching means for searching a database in which a plurality of identification candidate images are stored based on the number of pixels; Second search means for searching the database in which identification candidate images are stored; means for outputting identification candidate ISAR images based on search results obtained by the first and second search means; Means for extracting an image corresponding to the number of pixels from the image data.
AR image search device. 10. An identification target ISAR (Inverse Inverse)
Means for converting a Synthetic Aperture Radar image into a pseudo-color image; means for dividing the pseudo-color image into a plurality of partial images; and calculating the number of pixels for each of the plurality of partial images for each color of the pseudo-color image. Means, a pixel distribution detecting means for detecting a pixel distribution for each color of the pseudo-color image for the plurality of partial images, and a second search for a database storing a plurality of identification candidate images based on the number of pixels. A second search unit that searches the database storing a plurality of identification candidate images based on the pixel distribution; and a search result obtained by the first and second search units. Means for outputting an identification candidate ISAR image; and means for extracting an image corresponding to the number of pixels from the identification candidate ISAR image. It IS, characterized in that to obtain
AR image search device.