JPS6313478A - Image processor - Google Patents

Image processor

Info

Publication number
JPS6313478A
JPS6313478A JP61156428A JP15642886A JPS6313478A JP S6313478 A JPS6313478 A JP S6313478A JP 61156428 A JP61156428 A JP 61156428A JP 15642886 A JP15642886 A JP 15642886A JP S6313478 A JPS6313478 A JP S6313478A
Authority
JP
Japan
Prior art keywords
data
image data
histogram
display
noise
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP61156428A
Other languages
Japanese (ja)
Inventor
Akio Kiyama
鬼山 昭男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP61156428A priority Critical patent/JPS6313478A/en
Publication of JPS6313478A publication Critical patent/JPS6313478A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/10Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Landscapes

  • Transforming Light Signals Into Electric Signals (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

PURPOSE:To display a picture of the earth-observation without flickers for monitoring by real time by measuring and operating parameters for noise correction for a LNADSAT picture in parallel with the processing for the display. CONSTITUTION:A separated image data (b) is converted to an image data (e) of less noise in a lookup table memory 3 by using separately data outputted from a computing element 5, and outputted to an output porcessor 6. In parallel with this processing, in a histogram measuring instrument 4, the histogram measurement in the unit of each photoelectric converter is executed with constant time intervals based on the image data (b), and the computing element 5 calculates the average value and the variance value of respective histograms (c). Such conversin table data (d) that the obtained values is made to equal to photoelectric converters is obtained, and outputted to the lookup table memory 3. By excuting the image processing for display in monitor and the arithmetic processing for correcting lateral streaks noise in parallel, a visible display picture without clickers can be obtained.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は地球観測衛星ランドサラ)−(L A N D
SAT)−5などから送られる画像信号を地上受信局で
実時間で処理し、モニタ装置に表示させる画像処理装置
に関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an earth observation satellite Landsara)
The present invention relates to an image processing device that processes an image signal sent from a SAT)-5 or the like in real time at a ground receiving station and displays the processed image signal on a monitor device.

〔従来の技術〕[Conventional technology]

地球観測衛星LANDSATは周回衛星であって、地球
観測のためにマルチスペクトラルスキャナ(MULTI
 5PECTRAL SC八へNER、以下MSSと略
す〉およびセマティ・ツク マ・ンパー(TIIEMA
TICMAPPER9以下TMと略す)が備えられてい
る。従来、このようなLANDSATにより観測される
地球画像含入力信号とする地上局の画像処理装置では、
入力信号のLANDSAT画像か持つ歪要因を実時間で
補正処理することは実現されていなかった。
The earth observation satellite LANDSAT is an orbiting satellite that uses a multispectral scanner (MULTI) for earth observation.
5PECTRAL SC HachieNER (hereinafter abbreviated as MSS) and Semati Tsukuma Npa (TIIEMA)
TICMAPPER9 (hereinafter abbreviated as TM) is provided. Conventionally, an image processing device of a ground station whose input signal includes an earth image observed by such LANDSAT,
It has not been possible to correct distortion factors in the LANDSAT image of the input signal in real time.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

LANDSATは進行方向に直交した走査装置により、
1回の走査でM S Sでは6個の光電変喚器、TMで
は16個の光電変換器を使用して同時にライン及び16
ラインの地球観測画像を得ている。これら光電変換器の
間の特性差及び変動によって、LANDSAT画像には
「横じま」ノイズが生じていた。
LANDSAT uses a scanning device perpendicular to the direction of travel,
One scan uses 6 photoelectric converters for MSS and 16 photoelectric converters for TM to simultaneously scan lines and 16 photoelectric converters.
Earth observation images of the line have been obtained. Differences and variations in characteristics between these photoelectric converters caused "horizontal" noise in LANDSAT images.

この様な特性の画像をインターレース表示のモニタ装置
に表示した場合、「横じま」ノイズがフリッカとなって
表われる。カラー表示を行なった場合は、この傾向が特
に著しく、時によっては、使用に耐えかねる場合もある
When an image with such characteristics is displayed on an interlace display monitor device, "horizontal stripe" noise appears as flicker. This tendency is particularly noticeable when color display is performed, and in some cases, it may become unusable.

本発明の目的は、この様な「横じま」ノイズを除去し、
フリッカのない鮮明な地球観測画像を表示できる画像処
理装置を提供することにある。
The purpose of the present invention is to remove such "horizontal stripe" noise,
An object of the present invention is to provide an image processing device capable of displaying clear earth observation images without flicker.

〔問題点を解決するための手段〕[Means for solving problems]

本発明の画像処理装置は、移動体に搭載され複数の光電
変換器を有する撮像装置が取得した画像データを受けこ
れら光電変換器単位の画像データに分離するデータ分離
手段と、このデータ分離手段からの画像データ単位で前
記光電変換器間の特性を抽出するようにヒストグラムを
計測するヒストグラム計測手段と、このヒストグラム計
測手段のヒストグラムからその平均値・分散値を計算し
これらが各光電変換器ごとに等しくなるような変換テー
ブルデータを求める演算手段と、この演算手段の変換テ
ーブルデータに従って前記分離画像データをノイズの補
正された画像データとするテーブル変換手段と、このテ
ーブル変換手段の出力によって表示画像信号をつくる出
力処理手段と3含み構成される。
The image processing device of the present invention includes a data separation means for receiving image data acquired by an imaging device mounted on a moving object and having a plurality of photoelectric converters, and separating the data into image data for each photoelectric converter; a histogram measuring means for measuring a histogram so as to extract the characteristics between the photoelectric converters in units of image data; and a histogram measuring means for calculating the average value and variance value from the histogram of the histogram measuring means, and calculating these values for each photoelectric converter. a calculation means for obtaining equal conversion table data; a table conversion means for converting the separated image data into noise-corrected image data according to the conversion table data of the calculation means; and a display image signal based on the output of the table conversion means. It is composed of three output processing means for producing.

〔実施例〕〔Example〕

次に本発明を図面により詳細に説明する。 Next, the present invention will be explained in detail with reference to the drawings.

第1図は本発明の画像処理装置の一実施例のブロック図
を示す。図において、1は入力端子、2は入力信号を光
電変換器単位のデータに分離するためのデータ分離器、
3は分離されたデータの輝度値を変換するためのルック
アップテーブルメモリ(テーブル変換手段)、4は分離
されたデータ単位でヒストグラムを計測するためのヒス
トグラムデータ、5は計測データを基にルックアップテ
ーブル値を求めるための演算器、6は変換されたデータ
を出力するための出力処理器である。
FIG. 1 shows a block diagram of an embodiment of an image processing apparatus according to the present invention. In the figure, 1 is an input terminal, 2 is a data separator for separating the input signal into data for each photoelectric converter,
3 is a lookup table memory (table conversion means) for converting the luminance value of separated data, 4 is histogram data for measuring a histogram in units of separated data, and 5 is a lookup based on the measurement data. An arithmetic unit 6 is used to obtain table values, and an output processor 6 is used to output converted data.

入力端子1から入力されるLANDSAT画像信号aは
、データ分離器2に入力され、光電変換器単位(M S
 Sでは6.TMでは16)の画像データbに分離され
る。ルックアップテーブルメモリ3およびヒストグラム
計測器4は、それぞれ入力画像の光電変換器の数だけ用
意されており、分離された画像データbは、ルックアッ
プテーブルメモリ3およびヒストグラム計測器4にそれ
ぞれ入力され、ルックア・ツブテーブルメモリ3におい
て別途演算器5から出力されるデータによりノイズの少
ない画像データeに変換され、出力処理器6に出力され
る。
The LANDSAT image signal a inputted from the input terminal 1 is inputted to the data separator 2, and the LANDSAT image signal a is inputted to the data separator 2.
6 in S. In TM, it is separated into 16) image data b. The look-up table memory 3 and the histogram measuring device 4 are prepared as many as the number of photoelectric converters for input images, and the separated image data b is input to the look-up table memory 3 and the histogram measuring device 4, respectively. In the look-a-table memory 3, the image data is converted into image data e with less noise using data output from a separate arithmetic unit 5, and is output to an output processor 6.

この処理と並行して、ヒストグラム計測器4では画像デ
ータbをもとに各光電変換器単位でのヒストグラム計測
を一定時間ごとに実施し、その計測結果をヒストグラム
データCとして演算器5に出力する。この演算器5は各
ヒストグラムCの平均値・分散値を計算し、この値が各
光電変換器ごとに等しくなるような変換テーブルデータ
dを求め、ルックアップテーブルメモリ3に出力する。
In parallel with this process, the histogram measuring device 4 performs histogram measurement for each photoelectric converter at regular intervals based on the image data b, and outputs the measurement results to the calculator 5 as histogram data C. . This calculator 5 calculates the average value and variance value of each histogram C, determines conversion table data d such that these values are equal for each photoelectric converter, and outputs it to the lookup table memory 3.

本発明において、モニタ表示用の画像処理と、「横じま
」ノイズ補正用の計算処理とを並行して実施することに
より、フリッカのない鮮明な表示画像を得られる。
In the present invention, by performing image processing for monitor display and calculation processing for "horizontal stripe" noise correction in parallel, a clear display image without flicker can be obtained.

なお、以上の処理がカラー表示の場合は、RlG、B三
系統について同時に行なう必要がある。
It should be noted that if the above processing is for color display, it is necessary to perform it simultaneously for the three RlG and B systems.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、フリッカとなってモニタ
表示上に表われる「横じま」ノイズを持ったLANDS
AT画像を表示用処理と並行して、ノイズ補正用パラメ
ータを計測・演算することにより、フリッカのない地球
観測画像を実時間でモニタ表示できる。
As explained above, the present invention is applicable to LANDS systems that have "horizontal stripe" noise that appears as flicker on the monitor display.
By measuring and calculating noise correction parameters in parallel with display processing of AT images, flicker-free earth observation images can be displayed on a monitor in real time.

【図面の簡単な説明】 第1図は本発明の一実施例による画像処理装置のブロッ
ク図である。 1・・・画像信号入力端子、2・・・データ分離器、3
・・・ルックアップテーブルメモリ、4・・・ヒストグ
ラム計測器、5・・・演算器、6・・・出力処理器、7
・・・出力端子。
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an image processing apparatus according to an embodiment of the present invention. 1... Image signal input terminal, 2... Data separator, 3
... Lookup table memory, 4... Histogram measuring device, 5... Arithmetic unit, 6... Output processor, 7
...Output terminal.

Claims (1)

【特許請求の範囲】[Claims] 移動体に搭載され複数の光電変換器を有する撮像装置が
取得した画像データを受けこれら光電変換器単位の画像
データに分離するデータ分離手段と、このデータ分離手
段からの画像データ単位で前記光電変換器間の特性を抽
出するようにヒストグラムを計測するヒストグラム計測
手段と、このヒストグラム計測手段のヒストグラムから
その平均値・分散値を計算しこれらが各光電変換器ごと
に等しくなるような変換テーブルデータを求める演算手
段と、この演算手段の変換テーブルデータに従って前記
分離画像データをノイズの補正された画像データとする
テーブル変換手段と、このテーブル変換手段の出力によ
って表示画像信号をつくる出力処理手段とを含む画像処
理装置。
data separation means for receiving image data acquired by an imaging device mounted on a moving body and having a plurality of photoelectric converters, and separating the image data into image data in units of photoelectric converters; and photoelectric conversion in units of image data from the data separation means. A histogram measuring means for measuring a histogram to extract inter-instrument characteristics, and a conversion table data that calculates the average value and variance value from the histogram of this histogram measuring means and makes them equal for each photoelectric converter. the table conversion means for converting the separated image data into noise-corrected image data according to the conversion table data of the calculation means; and the output processing means for generating a display image signal from the output of the table conversion means. Image processing device.
JP61156428A 1986-07-02 1986-07-02 Image processor Pending JPS6313478A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61156428A JPS6313478A (en) 1986-07-02 1986-07-02 Image processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61156428A JPS6313478A (en) 1986-07-02 1986-07-02 Image processor

Publications (1)

Publication Number Publication Date
JPS6313478A true JPS6313478A (en) 1988-01-20

Family

ID=15627530

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61156428A Pending JPS6313478A (en) 1986-07-02 1986-07-02 Image processor

Country Status (1)

Country Link
JP (1) JPS6313478A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6154252A (en) * 1996-11-13 2000-11-28 Nec Corporation Imaging device for use as radiation detector
CN106651792A (en) * 2016-11-28 2017-05-10 苏州中科天启遥感科技有限公司 Method and device for removing strip noise of satellite image

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6154252A (en) * 1996-11-13 2000-11-28 Nec Corporation Imaging device for use as radiation detector
CN106651792A (en) * 2016-11-28 2017-05-10 苏州中科天启遥感科技有限公司 Method and device for removing strip noise of satellite image
CN106651792B (en) * 2016-11-28 2020-04-07 苏州中科天启遥感科技有限公司 Method and device for removing stripe noise of satellite image

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