JPS6454993A - Convergence error correction method - Google Patents
Convergence error correction methodInfo
- Publication number
- JPS6454993A JPS6454993A JP21214487A JP21214487A JPS6454993A JP S6454993 A JPS6454993 A JP S6454993A JP 21214487 A JP21214487 A JP 21214487A JP 21214487 A JP21214487 A JP 21214487A JP S6454993 A JPS6454993 A JP S6454993A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- center
- image
- convergence error
- convergence
- 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.)
- Granted
Links
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
PURPOSE:To accurately detect the position of the center of a display image in each area even if the S/N of the display image is not very good by interpolating an input image signal, approximating the signal to a quadratic equation by applying a threshold. CONSTITUTION:In a signal generator 2, a repetitious pattern in a low frequency is generated and displayed in a display device 1 for measurement. Thus displayed pattern is picked up by an image pickup device 4, and a signal from the device 4 is supplied to an image processor 5. In the processor 5, a signal from the device 4 is converted to digital signal, and this signal is subjected to the interpolation processing, then a threshold is applied, so that a signal from the generator 2 is approximated to the quadratic equation in order to obtain the position of the center of each area. The above processing is executed for respective waveforms of colors R, G, B in order to calculate errors in the positions of center among the respective colors, and thus convergence error is detected. Based on this convergence error, the convergence is adjusted.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62212144A JP2515816B2 (en) | 1987-08-26 | 1987-08-26 | Convergence error correction method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62212144A JP2515816B2 (en) | 1987-08-26 | 1987-08-26 | Convergence error correction method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6454993A true JPS6454993A (en) | 1989-03-02 |
JP2515816B2 JP2515816B2 (en) | 1996-07-10 |
Family
ID=16617618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62212144A Expired - Lifetime JP2515816B2 (en) | 1987-08-26 | 1987-08-26 | Convergence error correction method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2515816B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02304595A (en) * | 1989-05-10 | 1990-12-18 | Samsung Electron Co Ltd | Automatic control system for computer controlled tv |
-
1987
- 1987-08-26 JP JP62212144A patent/JP2515816B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02304595A (en) * | 1989-05-10 | 1990-12-18 | Samsung Electron Co Ltd | Automatic control system for computer controlled tv |
Also Published As
Publication number | Publication date |
---|---|
JP2515816B2 (en) | 1996-07-10 |
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Legal Events
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EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 12 Free format text: PAYMENT UNTIL: 20080430 |