JP2861941B2 - Earth observation satellite image reception processor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an earth observation satellite image reception processing device, and more particularly to an earth observation satellite image reception processing device for receiving and distributing earth image data transmitted from an earth observation satellite.

[0002] Earth observation satellites include the earth observation platform technology satellite "ADEOS" and the earth resource satellite No. 1 "JERS-
1 ", Landsat satellite, etc. Examples of earth image data transmitted from an earth observation satellite include image data generated by a high-performance visible and near-infrared radiometer “AVNIR” and image data captured by an optical sensor “OPS”.

[0003]

2. Description of the Related Art Conventionally, in this type of quick look processing, scene information for data reception is selected from a plurality of scene information input in advance, and the name of an observation sensor acquired for each scene at the same time as data reception is selected. , The date and time of observation, the quality information of the earth image data, the cloud amount evaluation information, and the character information such as the earth latitude and longitude information of the scene to be cut out are created as catalog information and provided to the earth image data user.

A data user places an order for earth image data from a data provider based on the catalog information. Parameters for ordering the earth image data include a satellite name, a sensor name, an observation date and time, and a position designation. The position is specified by latitude and longitude, or by satellite coordinates (RSP) or earth projection coordinates (GSR) with the elevation point set to 0 degree.
Etc.

[0005]

However, in the conventional example, in order for a user of the earth image data to select (order) desired data from a huge amount of earth image data, the data acquisition status and the like are determined from catalog information. There is an inconvenience that it takes a long time to search because it is necessary to make a judgment. This is because the conventional catalog information is textual information, and therefore, when searching for a scene desired by a data user, it is difficult to accurately grasp the observation status and scene status of the image data.

[0006] The earth observation data obtained by the optical sensor is easily affected by clouds, and cannot be used for originally intended use depending on the amount and position of the clouds. However, quality information and cloud amount evaluation information are provided by the operator. Since this information is added as additional work, judgment may be biased due to differences in experience etc., and it is difficult to order earth image data based on this additional information without confirming the actual image. Was.

[0007]

An object of the present invention is to improve the disadvantages of the prior art and, in particular, to provide an earth observation satellite image reception processing device capable of displaying the outline of earth image data received from an earth observation satellite in a user-friendly manner. The purpose is to provide.

[0008]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a receiving section for receiving earth image data transmitted from an earth observation satellite, and an earth image data received by the receiving section based on predetermined scene information. An image processing unit that cuts out each scene and performs a rough process on the earth image data, and a character information adding unit that adds position information specified by scene information to the earth image data generated by the image processing unit ing. In addition, the image processing unit edits the earth image data cut out for each scene to a predetermined size, and the earth image data generated by the image editing function and the plurality of images created by the character information creating unit. And a browsing data generation function of generating browsing data by combining the character information with This aims to achieve the above-mentioned object.

According to the present invention, an image desired by a user can be immediately identified and selected from a large amount of earth image data by creating browse data of the earth image data. Is intended to be enlarged.

[0010]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, an earth observation satellite image reception processing device includes a receiving unit 10 for receiving earth image data transmitted from an earth observation satellite 1 and a predetermined image data received by the receiving unit 10. An image processing unit 12 that cuts out each scene based on the scene information and performs rough processing on the earth image data, and position information and the like specified by the scene information in the earth image data generated by the image processing unit 12. And a character information adding unit 18 to be added.

In addition, as shown in FIG.
2, an image editing function 14 for editing the earth image data cut out for each scene to a predetermined size, an earth image data generated by the image editing function, and a plurality of character information created by a character information creating unit. And a browse data generating function 16 for generating browse data by combining

In the editing process by the image editing function 14, an image for one scene is composed of, for example, 546 pixels × 387 pixels and 25
When there are six gradations, this is a simplification process for use with browse data, and more specifically, a process of reducing the number of pixels or gradations to make the image size good for browsing. This editing process is appropriately determined according to the accuracy required for the browse data and the like. When the browse data is composed of images of a plurality of types of image accuracy, the image editing function performs a plurality of operations from a single earth image data. Generate browsing image data of size and resolution. Depending on the terminal to which the browse data is provided, the image may be compressed.

The character information adding unit 18 adds position information specified by scene information to the earth image data generated by the image processing unit 12. The scene information includes header information, reception information, observation information, and observation point information. The header information has a satellite name, a sensor name, and a validity period. The reception information includes a reception path,
It has a total orbit number, and reception start and end time information.
The observation information includes, for example, an observation RSP and a total observation start number. Observation point information is based on scene start /
It consists of an end time and scene position information.

The scene information is information determined in advance according to the current time, and the character information adding unit 18 adds position information and the like based on the scene information to the earth image data received from the earth observation satellite. As location information,
It may be specified by latitude and longitude, or by satellite coordinates (RSP) with the elevation point set to 0 degrees, or by earth projection coordinates (GSR). Since the character information adding unit 18 uniformly adds position information and the like to the earth image data, even if the image cannot be clearly discriminated in the earth image data due to, for example, a large amount of cloud, the character information adding unit 18 adds the position information to the earth image data. The attached position information allows the user to understand the rough contents.

The character information adding section 18 may add various information for specifying the earth image data together with the position information. For example, information that can be obtained from scene information such as satellite names, sensor names, scene start and end time information is added to each earth image data.

In the configuration shown in FIGS. 1 and 2, since the image processing unit 12 edits the earth image data and generates browse data, the contents of the plurality of earth image data become clear at a glance. Users can quickly and accurately select data that meets their needs from a large number of earth image data.

Further, the character information adding section 18 has a quality information adding function of adding quality information such as cloud amount evaluation information externally input to the edited earth image data according to the earth image data information. Information indicating the quality of the earth image data, such as the cloud amount evaluation information, is externally input by the operator of the earth observation satellite image reception processing device.

The character information adding unit 18 adds various quality information input by the operator to the earth image data, so that the user of the earth image data can check the quality information of the earth image data with the confirmation of the browse data. Therefore, the user can more accurately select the intended earth image data.

Further, as shown in FIG.
In addition, a lookup display unit for displaying the earth image data as a moving image is provided, and the image processing unit 12 is provided with a moving image display control function of controlling the coarsely processed earth image data to be output to the display unit.

For this reason, moving image data used for a lookup device for sequentially checking the reception state of the earth image data and image data used for the browse data are generated from the same rough processed earth image data. Creation of browse data and display of a moving image can be performed more quickly.

This will be described in detail.

FIG. 3 is a block diagram showing the configuration of the hardware resources of the earth observation satellite image reception processing apparatus according to the present embodiment shown in FIGS. 1 and 2. The earth observation satellite image reception processing device includes an image processor 30 having a memory having a capacity for storing at least one pass of reception of earth image data from a satellite, a hard disk 48 for storing browse data for one reception, and Control processor 4 for controlling
0.

The image processor 30 mainly includes a data input unit 33, an earth image processing unit 34, a frame memory control unit 35, a frame memory 36 corresponding to each of the three primary colors RGB, and a video output correction unit for moving image data. LUT unit 37 having a look-up table (LUT). On the other hand, the control processor 2
And a control unit and an operation terminal 49. The input of the image processor 1 is earth image data (including a synchronization clock) frame-synchronized by an external synchronization unit.

The image processor 30 writes the earth image data, which has been performed by the conventional quick look process of this type, into a memory and converts the data obtained by thinning the lines of the image data into a video signal as moving image data.
It is displayed on the TSC (or HV) monitor device. At the same time, the thinned image data is continuously written to the hard disk from the scene start time to the end time of the scene information selected in advance, and a QL (quick look) image file for one reception path is created.

At the same time as receiving data, catalog information such as observation sensor names, cut-out earth latitude / longitude information, and data acquisition quality information for each scene is created for one reception pass and recorded on the hard disk.

Immediately after the data reception is completed, the image data of the QL image file is sequentially cut out from the cut-out information of all scenes included in the catalog information by the earth latitude and longitude information, and the catalog information and the cut-out image data are separated for each scene. Create the combined browse data for one reception path and write it to the hard disk.

When the creation of browse data for one reception path is completed, the browse data is transmitted via LAN to a higher-level system for providing image data to the user.

As the earth observation satellite, for example, the earth observation platform technology satellite “ADEOS” and the earth resource satellite No. 1 “JERS (Japanese Earth Resources Satellite)
e) ”-Fuyo No. 1-.

ADEOS is a high-performance visible and near-infrared radiometer (AVNI
R), OCTS (Ocean Color and Temperature Scanner)
have. AVNIR (Advanced Visible and Near-Infr
ared Radiometer) is a high-resolution optical sensor that observes visible to near-infrared sunlight reflected from terrestrial and coastal areas.It has 4 bands with a spatial resolution of about 16 m and 1 band with a spatial resolution of about 8 m. Having. As the AVNIR detector, a CCD having 10,000 and 5,000 pixels is used to achieve high resolution. The image signal processing unit in the electric circuit unit compresses the data by about 10% to reduce the transmission rate.

The OCTS repeatedly and frequently obtains the ocean color and water temperature data globally to grasp the chlorophyll concentration, suspended solids, and water temperature. In this embodiment, the OCTS uses the browse data for the OCTS. Not created, AVNIR
Create browsing data in real time for the data by.

The data observed by these sensors is based on ADEOS
Are temporarily recorded on three mission data recorders and two low-speed mission data recorders, and are reproduced at high speed over the ground stations such as the Earth Observation Center.
Data is sent.

JERS is a synthetic aperture radar "SAR (Synt
hetic Aperture Rader) ”and the optical sensor“ OPS (Optic
al Sensor) ". Here, the browse data is not created for the SAR, but is created only for the data from the OPS.

FIG. 4 is an explanatory diagram showing a conceptual diagram of the creation of browse data. When data is received from Earth Observation Satellite 1,
At the same time as this reception, the earth image data is taken. further,
A part of the scene information in the scene information file 31 corresponding to the data reception is read. Then, at the time of data reception, a continuous QL image data file (for one reception path) is cut out by the scene information file.

The image data is cut out by scene information. The catalog information is created corresponding to the scene information created at the same time as receiving the data. Then, the blouse data 32 is generated based on the catalog information and the earth image data. The moving image data is output simultaneously with the data reception.

Next, the operation will be described.

First, the control processor 40 takes in the scene information file 31 from outside. The scene information file 31 is normally configured as a plurality of files for one day received by the data receiving station, with the scene information group of one reception path as one unit file, and is taken in by the control processor 40 via the LAN. In the control unit / operation terminal 40, a relevant scene information file for receiving satellite data is selected in advance.

The earth image data synchronized by the frame synchronization unit is received by the satellite data reception, taken into the image processor 40, converted into a video signal as real-time moving image data through each functional unit, and then converted to NTSC.
Alternatively, it is output to the HV monitor device 20.

In this operation, when the scene start time included in the selected scene information file comes, the earth data is sequentially and continuously recorded on the hard disk 48 from the earth image processing section 34. At the same time, catalog information including quality information (such as the number of missing lines) of the image data of the scene taken in correspondence with each scene information of the scene information file, and center latitude / longitude information of the scene is created in real time. Is recorded on the hard disk 48.

After the data reception is completed, image data is cut out for each scene from the QL image data file recorded on the hard disk according to the catalog information file. Catalog information is added to the extracted image data to create browse data, which is stored on a hard disk.

When all the browsing data is created based on all the generated catalog information, the browsing data is transmitted as one browse data file 13 to the host system which provides the browsing data to the image data user via the LAN.

As described above, according to this embodiment, catalog data created for each scene and browse data to which the earth image data of the corresponding scene is added are created almost at the same time as data reception from the satellite, and Therefore, it can be more intuitively determined as image data than catalog information which is conventional character information. Therefore, when a scene required by the user of the earth image data is searched and higher-order image processing is performed, it is possible to accurately and quickly determine the image data acquisition status and the observation status of the selected scene.

Conventionally, since the image data of the optical sensor is susceptible to the effect of clouds, the cloud amount evaluation based on the operator's judgment has been performed as an additional work. there were. However, according to the present embodiment, since the user directly looks at the browse data, it is possible to intuitively determine the quality of the image data. For this reason, the order of the earth image data can be performed more accurately. Furthermore, because the configuration is such that an outline is checked after browsing data and an order is placed, it is possible to select necessary earth image data from a large amount of earth image data even if the user is not very familiar with the earth image data. Therefore, the number of users of the earth image data can be increased.

[0044]

The present invention is constructed and functions as described above. According to this, since the image processing section edits the earth image data and generates the browse data, the contents of the plurality of earth image data can be seen at a glance. Therefore, the user of the earth image data can quickly and accurately select the one that meets his or her needs from a large number of earth image data. As described above, it is possible to provide an unprecedented excellent earth observation satellite image reception processing device capable of displaying the outline of the earth image data received from the earth observation satellite in a user-friendly manner.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment according to the present invention.

FIG. 2 is a block diagram illustrating a detailed configuration of an image processing unit illustrated in FIG. 1;

FIG. 3 is a block diagram illustrating a configuration of hardware resources according to the embodiment illustrated in FIG. 1;

FIG. 4 is an explanatory diagram for explaining the concept of creating browse data.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Earth observation satellite 10 Receiving part 12 Image processing part 14 Image editing function 16 Browse data generation function 18 Character information addition part 20 Lookup display part

Claims (3)

(57) [Claims] A receiving unit for receiving earth image data transmitted from an earth observation satellite; cutting out the earth image data received by the receiving unit for each scene based on predetermined scene information; An image processing unit that performs a rough process, and a character information adding unit that adds position information and the like specified by the scene information to the earth image data generated by the image processing unit, wherein the image processing unit includes: An image editing function for editing the earth image data cut out for each scene to a predetermined size, and combining the earth image data generated by the image editing function with a plurality of character information created by the character information creating unit. An earth observation satellite image reception processing device having a browse data generation function of generating browse data. 2. The apparatus according to claim 1, wherein the character information adding unit has a quality information adding function of adding quality information such as cloud amount evaluation information externally input to the edited earth image data in accordance with the earth image data information. The earth observation satellite image reception processing device according to claim 1, wherein 3. A control in which the image processing unit is provided with a lookup display unit for displaying the earth image data as a moving image, and the image processing unit outputs the coarsely processed earth image data to the display unit. 2. The earth observation satellite image reception processing device according to claim 1, further comprising a moving image display control function for performing the following.