Method of reading image signal from image senser |
Title: |
Method of reading image signal from image senser |
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Application Number: |
200410008788 |
Application Date: |
2004/03/19 |
Announcement Date: |
2005/01/12 |
Pub. Date: |
2006/06/14 |
Publication Number: |
1564579 |
Announcement Number: |
1259794 |
Grant Date: |
2006-6-14 |
Granted Pub. Date: |
2006-6-14 |
ApplicationType: |
Invention |
State/Country: |
11[China|beijing] |
IPC: |
H04N 3/15 |
Applicant(s): |
Tsinghua Univ. |
Inventor(s): |
Li Jincheng, Yang Huazhong, Luo Rong |
Key Words: |
image signal, image senser, reading method |
Abstract: |
The method first selects up the scan line in turn frmo image, the selected scan line scans each pixel at column scan frequency; the low pass filter whose cut-off frequency is Wn is made for each column pixel; the A/D conversion is made for the signal filtered with low pass filter. By using the invention, the cut-off frequency-Wn is much lower than column scan frequency, the frequency of A/D conversion also much lower than column scan frequency, so that the circuit can implement a high speed image acquisition with a low speed A/D conversion. |
Claim: |
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Priority: |
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PCT: |
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