JPH113418A - Image processing method - Google Patents
Image processing methodInfo
- Publication number
- JPH113418A JPH113418A JP9156290A JP15629097A JPH113418A JP H113418 A JPH113418 A JP H113418A JP 9156290 A JP9156290 A JP 9156290A JP 15629097 A JP15629097 A JP 15629097A JP H113418 A JPH113418 A JP H113418A
- Authority
- JP
- Japan
- Prior art keywords
- luminance
- memory
- pixels
- image processing
- data
- 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.)
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- Picture Signal Circuits (AREA)
- Processing Of Color Television Signals (AREA)
- Image Processing (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、デジタル映像信号
の画像処理に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to image processing of digital video signals.
【０００２】[0002]
【従来の技術】従来、偽輪郭の発生を押さえる画像処理
方法としては特開平６−６２２８０号公報に記載された
ものが知られている。これは平滑な輝度を持つ部分にラ
ンダムノイズを加え輝度の変化する部分の境界をぼかす
ことにより偽輪郭の発生を押さえる構成とされている。2. Description of the Related Art Conventionally, as an image processing method for suppressing the occurrence of false contours, a method described in Japanese Patent Application Laid-Open No. 6-62280 is known. This is configured to suppress the occurrence of false contours by adding random noise to a portion having a smooth luminance and blurring the boundary of the portion where the luminance changes.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
ような構成では映像自体にノイズが乗るためぼやけた映
像になってしまう場合や、また動画像でスクロールして
いる映像などの場合にノイズだけ画面上に残り、汚れた
レンズでスクロールする映像を撮影したかのような画像
になってしまうなどの問題があった。However, in the above-described configuration, the image itself becomes blurred due to noise on the image itself, or in the case of an image scrolling in a moving image, only the noise is displayed on the screen. There is a problem that the image is left on the top and becomes an image as if a video scrolling with a dirty lens was taken.
【０００４】[0004]
【課題を解決するための手段】前記課題を解決するため
に、本発明は入力されたＲ、Ｇ、Ｂデジタル映像信号の
それぞれの輝度変化のポイントに注目して画像処理を行
い良好な画像を提供する画像処理方法とした。In order to solve the above-mentioned problems, the present invention focuses on the points of luminance change of each of the input R, G, and B digital video signals and performs image processing to obtain a good image. The provided image processing method was used.
【０００５】本発明により、偽輪郭や輝度の境界部の段
差などの発生を押さえた良好な画像を得る。According to the present invention, it is possible to obtain a good image in which the occurrence of a false contour or a step at a boundary of luminance is suppressed.
【０００６】[0006]
【発明の実施の形態】本発明の第１の発明は、入力され
たＲ，Ｇ，Ｂデジタル映像信号のそれぞれの水平方向に
３画素あるいはそれ以上の画素の輝度データを保持する
メモリを備え、前記メモリのデータから階段状に輝度が
変化していることを検出した部分のＲ、Ｇ，Ｂそれぞれ
の輝度変化の場所を同一ポイントにそろえ、偽輪郭の発
生を押さえ良好な画像をえる画像処理方法であり、少な
いメモリで良好な画像を提供できるという作用を有す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS A first invention of the present invention comprises a memory for holding luminance data of three or more pixels in the horizontal direction of each of input R, G, B digital video signals, Image processing for obtaining a good image by suppressing the occurrence of false contours by aligning the locations of the R, G, and B luminance changes of the portion where the luminance change is detected in a stepwise manner from the data in the memory at the same point. This method has the effect that a good image can be provided with a small memory.
【０００７】つぎに、第２の発明は、入力されたＲ，
Ｇ，Ｂデジタル映像信号のそれぞれの水平方向と垂直方
向に３画素あるいはそれ以上の画素の輝度データを保持
するメモリを備え、前記メモリのデータから階段状に輝
度が変化していることを検出した部分のＲ、Ｇ，Ｂそれ
ぞれの輝度変化の場所を同一ポイントにそろえ、偽輪郭
の発生を押さえ良好な画像を得る画像処理方法であり、
斜め方向や垂直方向の偽輪郭の発生も押さえることがで
き良好な画像を提供できるという作用を有する。Next, a second aspect of the present invention relates to the input R,
A memory for holding luminance data of three or more pixels in the horizontal and vertical directions of the G and B digital video signals, and detecting that the luminance changes stepwise from the data in the memory; This is an image processing method in which the locations of the luminance changes of R, G, and B of the portion are aligned at the same point to suppress the occurrence of false contours and obtain a good image.
This has the effect of suppressing generation of false contours in oblique and vertical directions and providing a good image.
【０００８】つぎに、第３の発明は、入力されたＲ，
Ｇ，Ｂデジタル映像信号のそれぞれの水平方向と垂直方
向に3画素あるいはそれ以上の画素の輝度データを保持
するメモリを備え、前記メモリのデータから斜め方向に
輝度変化の大きな輪郭が存在するとき、前記輪郭のＲ、
Ｇ、Ｂの輝度を補間する事により滑らかな輪郭を生成し
良好な画像を提供することを目的とする画像処理方法で
あり従来階段状に見えていた斜め方向の輪郭部を滑らか
な輪郭にすることができ良好な画像を得る。Next, a third aspect of the present invention is to provide an input R,
A memory for holding luminance data of three or more pixels in the horizontal direction and the vertical direction of each of the G and B digital video signals, and when there is a contour having a large luminance change in an oblique direction from the data in the memory, R of the contour,
An image processing method for generating a smooth contour by interpolating the luminances of G and B to provide a good image, and makes a contour in a diagonal direction, which has been seen in a stepwise manner in the past, into a smooth contour. Can get good images.
【０００９】（実施の形態１）以下に、本発明の実施の
形態１における画像処理方法ついて、図１を参照しなが
ら説明する。(Embodiment 1) Hereinafter, an image processing method according to Embodiment 1 of the present invention will be described with reference to FIG.
【００１０】図１において、図１（ａ）は水平方向に黒
から白へ変化する映像信号であり、図１イは水平方向に
５画素のメモリが保持している情報の個所を示す、アナ
ログ信号からアナログ−デジタル変換された信号は、ア
ナログ−デジタル変換器自体の精度や入力されたＲ、
Ｇ、Ｂ信号自体の伝送経路の違いなどによりデジタル変
換されたＲ、Ｇ、Ｂそれぞれのデータは図１（ｂ）のよ
うに輝度の変化点にずれが生じる場合があり、この場合
図１ロにＲの縦線が見えるようになることになる。In FIG. 1, FIG. 1A shows a video signal which changes from black to white in the horizontal direction, and FIG. 1A shows an analog portion of the information held in the memory of 5 pixels in the horizontal direction. The signal obtained by analog-to-digital conversion from the signal is converted into the accuracy of the analog-to-digital converter itself, the input R,
As shown in FIG. 1B, the R, G, and B data that have been digitally converted due to differences in the transmission paths of the G and B signals themselves may have deviations in the luminance change points. The vertical line of R becomes visible in FIG.
【００１１】本実施例の場合Ｇの輝度に注目し、２画素
ずつ以上同じ輝度の連続した緩やかな輝度変化をしてい
る個所に注目し、その時のＲ、Ｂの輝度を調べ同様な２
画素ずつ以上同じ輝度の連続した緩やかな輝度変化をし
ているかどうかを調べ、この輝度変化がＧの輝度変化を
１画素あるいは２画素動かしたものと同じである場合輝
度変化のポイントをＧと同一ポイントに移動させる。本
実施例の場合Ｒがこれに相当し出力されるデータは図１
（ｃ）となる。かかる構成によりＲの縦線がなくなり偽
輪郭のない良好な画像を得ることができる。In the case of this embodiment, attention is paid to the luminance of G, attention is paid to a portion where the same luminance is continuously changed gradually over two pixels, and the luminance of R and B at that time is examined.
It is checked whether or not there is a continuous and gradual change in luminance of the same luminance for each pixel. If this luminance change is the same as that obtained by moving the luminance change of G by one pixel or two pixels, the point of the luminance change is the same as G Move to point. In the case of this embodiment, R corresponds to this and the output data is shown in FIG.
(C). With such a configuration, it is possible to obtain a good image with no vertical lines and no false contour.
【００１２】（実施の形態２）以下に、本発明の実施の
形態２における画像処理方法について、図２を参照しな
がら説明する。Embodiment 2 Hereinafter, an image processing method according to Embodiment 2 of the present invention will be described with reference to FIG.
【００１３】図２において、図２（ａ）は左上方向から
右下方向に黒から白へ変化する映像信号であり、図２イ
は水平、垂直方向に５画素のメモリが保持している情報
の個所を示す、アナログ信号からアナログ−デジタル変
換された信号は、アナログ−デジタル変換器自体の精度
や入力されたＲ、Ｇ、Ｂ信号自体の伝送経路の違いなど
によりデジタル変換されたＲ、Ｇ、Ｂそれぞれのデータ
は図２（ｂ）のように輝度の変化点にずれが生じる場合
があり、この場合図２ロに右上から左下に走るＲの斜線
が見えるようになることになる。2A shows a video signal which changes from black to white from upper left to lower right from FIG. 2A. FIG. 2A shows information held in a memory of 5 pixels in horizontal and vertical directions. The analog-to-digital converted signals from the analog signals are converted to digital signals R, G due to differences in the accuracy of the analog-to-digital converter itself and the transmission paths of the input R, G, and B signals. 2B, there is a case where a shift occurs in the point of change in luminance as shown in FIG. 2B. In this case, an oblique line of R running from upper right to lower left can be seen in FIG.
【００１４】本実施例の場合Ｇの輝度に注目し、２画素
ずつ以上同じ輝度の連続した緩やかな輝度変化をしてい
る個所に注目し、その時のＲ、Ｂの輝度を調べ同様な２
画素ずつ以上同じ輝度の連続した緩やかな輝度変化をし
ているかどうかを調べ、この輝度変化がＧの輝度変化を
１画素あるいは２画素動かしたものと同じである場合輝
度変化のポイントをＧと同一ポイントに移動させる。本
実施例の場合Ｒがこれに相当し出力されるデータは図１
（ｃ）となる。かかる構成によりすべての方向に走る偽
輪郭の発生を押さえ良好な画像を得ることができる。In the case of this embodiment, attention is paid to the luminance of G, attention is paid to a portion where the same luminance is continuously changed gradually over two pixels or more, and the luminances of R and B at that time are examined.
It is checked whether or not there is a continuous and gradual change in luminance of the same luminance for each pixel. If this luminance change is the same as that obtained by moving the luminance change of G by one pixel or two pixels, the point of the luminance change is the same as G Move to point. In the case of this embodiment, R corresponds to this and the output data is shown in FIG.
(C). With such a configuration, it is possible to obtain a good image while suppressing the occurrence of false contours running in all directions.
【００１５】（実施の形態３）以下に、本発明の実施の
形態３における画像処理方法について、図３を参照しな
がら説明する。(Embodiment 3) An image processing method according to Embodiment 3 of the present invention will be described below with reference to FIG.
【００１６】図３において、図３（ａ）は左上方向から
右下方向を境に黒から肌色へ変化する映像信号であり、
図３イは水平、垂直方向に３画素のメモリが保持してい
る情報の個所を示す、アナログ信号からアナログ−デジ
タル変換された信号は、マトリクス表示を行う画像表示
装置の場合図３（ｂ）のようになりＲの輝度が最も高い
ため階段状の段差が発生する。In FIG. 3, FIG. 3A shows a video signal which changes from black to flesh color from the upper left direction to the lower right direction.
FIG. 3A shows the locations of information held in the memory of three pixels in the horizontal and vertical directions. FIG. 3B shows a case where an analog-to-digital converted signal from an analog signal is used for an image display device that performs matrix display. And the luminance of R is the highest, so that a step-like step occurs.
【００１７】本実施例の場合各画素の輝度に注目し、大
きな輝度変化をしている個所に注目し、その輝度変化が
斜め方向に連続している場合補間を行う。図３ｂのよう
な輝度分布の場合図３ロの部分が輝度差が大きくなりす
ぎ階段状に見えてしまう、そこでこの部分に補間を行い
出力されるデータは図３（ｃ）となる。かかる構成によ
り斜め方向に走る階段状の段差の発生を押さえ良好な画
像を得ることができる。In the present embodiment, attention is paid to the luminance of each pixel, attention is paid to a portion where a large luminance change is made, and interpolation is performed when the luminance change is continuous in an oblique direction. In the case of the luminance distribution as shown in FIG. 3B, the part shown in FIG. 3B has an excessively large luminance difference and looks like a staircase. Therefore, data obtained by performing interpolation on this part is shown in FIG. 3C. With this configuration, it is possible to obtain a good image while suppressing the occurrence of a step-like step running in an oblique direction.
【００１８】なお本実施例からも分かるとおり、輝度変
化を検出するメモリの容量を増やし、さらに精細な輝度
検出を行えばさらに良好な画像を得ることができる。As can be seen from the present embodiment, a better image can be obtained by increasing the capacity of the memory for detecting a change in luminance and performing finer luminance detection.
【００１９】[0019]
【発明の効果】以上説明したように、本発明によれば、
偽輪郭の発生を押さえた良好な画像を提供できる。ま
た、マトリクス表示を行う画像表示装置の場合階段状の
段差の発生を押さえた良好な画像を提供できる。As described above, according to the present invention,
It is possible to provide a good image in which false contours are suppressed. In addition, in the case of an image display device that performs matrix display, it is possible to provide a good image in which the occurrence of a step-like step is suppressed.
【図１】本発明の実施の形態１における映像信号を示す
図FIG. 1 is a diagram showing a video signal according to Embodiment 1 of the present invention.
【図２】本発明の実施の形態２における映像信号を示す
図FIG. 2 is a diagram showing a video signal according to a second embodiment of the present invention.
【図３】本発明の実施の形態３における映像信号を示す
図FIG. 3 is a diagram showing a video signal according to Embodiment 3 of the present invention.
イ メモリが保持している輝度データの領域 ロ 偽輪郭の発生個所 B. The area of the luminance data stored in the memory b.
Claims (4)
のそれぞれの輝度変化のポイントに注目して画像処理を
行い良好な画像を得る画像処理方法。1. An image processing method for obtaining a good image by performing image processing while paying attention to points of luminance change of input R, G, and B digital video signals.
のそれぞれの水平方向に３画素あるいはそれ以上の画素
の輝度データを保持するメモリを備え、前記メモリのデ
ータから階段状に輝度が変化していることを検出した部
分のＲ、Ｇ，Ｂそれぞれの輝度変化の場所を同一ポイン
トにそろえ、偽輪郭の発生を押さえ良好な画像を得る画
像処理方法。2. A memory for holding luminance data of three or more pixels in the horizontal direction of each of the inputted R, G, B digital video signals, wherein the luminance changes stepwise from the data in the memory. An image processing method in which the locations of the luminance changes of R, G, and B of the portion where the detection is performed are aligned at the same point to suppress the occurrence of false contours and obtain a good image.
のそれぞれの水平方向と垂直方向に３画素あるいはそれ
以上の画素の輝度データを保持するメモリを備え、前記
メモリのデータから階段状に輝度が変化していることを
検出した部分のＲ、Ｇ，Ｂそれぞれの輝度変化の場所を
同一ポイントにそろえ、偽輪郭の発生を押さえ良好な画
像を得る画像処理方法。3. A memory for holding luminance data of three or more pixels in the horizontal and vertical directions of each of the inputted R, G, B digital video signals, wherein the data of the memory is stored in a stepwise manner. An image processing method for obtaining a good image by suppressing the occurrence of false contours by aligning the positions of the R, G, and B luminance changes of the portion where the luminance change is detected at the same point.
のそれぞれの水平方向と垂直方向に3画素あるいはそれ
以上の画素の輝度データを保持するメモリを備え、前記
メモリのデータから斜め方向に輝度変化の大きな輪郭が
存在するとき、前記輪郭のＲ、Ｇ、Ｂの輝度を補間する
事によりＲ、Ｇ、Ｂマトリクス表示する画像表示装置に
対して滑らかな輪郭を生成し良好な画像を得る画像処理
方法。4. A memory for holding luminance data of three or more pixels in the horizontal and vertical directions of each of the inputted R, G, B digital video signals, and obliquely extending from the data in the memory in an oblique direction. When there is a contour having a large change in luminance, a smooth contour is generated for an image display device that displays R, G, and B matrices by interpolating the R, G, and B luminances of the contour to obtain a good image. Image processing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9156290A JPH113418A (en) | 1997-06-13 | 1997-06-13 | Image processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9156290A JPH113418A (en) | 1997-06-13 | 1997-06-13 | Image processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH113418A true JPH113418A (en) | 1999-01-06 |
Family
ID=15624586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9156290A Pending JPH113418A (en) | 1997-06-13 | 1997-06-13 | Image processing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH113418A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6774172B1 (en) | 1998-12-28 | 2004-08-10 | Bridgestone Corporation | Adhesive composition, resin material, rubber article and pneumatic tire |
-
1997
- 1997-06-13 JP JP9156290A patent/JPH113418A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6774172B1 (en) | 1998-12-28 | 2004-08-10 | Bridgestone Corporation | Adhesive composition, resin material, rubber article and pneumatic tire |
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