JPH0450983U - - Google Patents
Info
- Publication number
- JPH0450983U JPH0450983U JP1990093348U JP9334890U JPH0450983U JP H0450983 U JPH0450983 U JP H0450983U JP 1990093348 U JP1990093348 U JP 1990093348U JP 9334890 U JP9334890 U JP 9334890U JP H0450983 U JPH0450983 U JP H0450983U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- character signal
- input
- background image
- character
- 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
Links
- 238000001914 filtration Methods 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Studio Circuits (AREA)
Description
第１図は本考案による画像表示回路の一実施例
を示すブロツク図である。
１……スーパーインポーズ混合回路、２……選
択回路、３……反転回路、１０……類似判定回路
、１１……ローパスフイルタ回路、１２……正弦
波発生回路、１３……振幅調整回路、１４……混
合回路、１５……比較回路。
FIG. 1 is a block diagram showing an embodiment of an image display circuit according to the present invention. DESCRIPTION OF SYMBOLS 1... Superimpose mixing circuit, 2... Selection circuit, 3... Inverting circuit, 10... Similarity determination circuit, 11... Low pass filter circuit, 12... Sine wave generation circuit, 13... Amplitude adjustment circuit, 14...mixing circuit, 15...comparison circuit.
Claims (1)
、 上記入力された文字信号又は上記反転手段から
出力された反転文字信号のいずれか一方を選択す
る選択手段と、 入力された背景画像信号及び上記入力された文
字信号とを比較し、両者が類似している場合には
上記反転文字信号を選択し、両者が非類似の場合
には上記文字信号を選択するように上記選択手段
に対して制御する類似判定手段と、 上記選択手段から出力された上記文字信号又は
上記反転文字信号と、上記入力された背景画像信
号とをスーパーインポーズ混合する混合手段と を備えたことを特徴とする画像表示回路。 (2) 上記類似判定手段がローパスフイルタ回路
を備え、入力された背景画像信号をこのローパス
フイルタ回路でフイルタリングした後に比較処理
を行なうことを特徴とする請求項１に記載の画像
表示回路。 (3) 上記類似判定手段が、入力された背景画像
信号を振幅変調する振幅変調手段と２入力信号の
一致不一致を検出する比較手段とを備え、振幅変
調された背景画像信号と文字信号とを上記比較手
段で比較することで、入力された背景画像信号及
び文字信号の類似非類似を検出するようにしたこ
とを特徴とする請求項１又は２に記載の画像表示
回路。 (4) 上記振幅変調手段による振幅変調を、正弦
波信号によつて行なうことを特徴とする請求項３
に記載の画像表示回路。[Claims for Utility Model Registration] (1) Inverting means for inverting an input character signal; and selection means for selecting either the input character signal or the inverted character signal output from the inversion means; , Compare the input background image signal and the input character signal, and if the two are similar, select the inverted character signal, and if the two are dissimilar, select the character signal. a similarity determination means for controlling the selection means in such a manner, and a mixing means for superimposing and mixing the character signal or the inverted character signal output from the selection means and the input background image signal. An image display circuit comprising: (2) The image display circuit according to claim 1, wherein the similarity determining means includes a low-pass filter circuit, and performs the comparison process after filtering the input background image signal with the low-pass filter circuit. (3) The similarity determination means includes an amplitude modulation means for amplitude modulating the input background image signal and a comparison means for detecting coincidence or mismatch between the two input signals, and the similarity determination means is configured to compare the amplitude modulated background image signal and the character signal. 3. The image display circuit according to claim 1, wherein similarity or dissimilarity between the inputted background image signal and character signal is detected by comparing the inputted background image signal and character signal. (4) Claim 3 characterized in that the amplitude modulation by the amplitude modulation means is performed by a sine wave signal.
The image display circuit described in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990093348U JPH0450983U (en) | 1990-09-05 | 1990-09-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990093348U JPH0450983U (en) | 1990-09-05 | 1990-09-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0450983U true JPH0450983U (en) | 1992-04-28 |
Family
ID=31830481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990093348U Pending JPH0450983U (en) | 1990-09-05 | 1990-09-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0450983U (en) |
-
1990
- 1990-09-05 JP JP1990093348U patent/JPH0450983U/ja active Pending
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