Method for increasing CCD image collection system frame rate

A technology of image acquisition and system frame, which is applied in the parts of TV system, scanning details of TV system, image communication, etc. It can solve the problems of reduced tracking accuracy, inability to track fast-moving targets, and target loss, etc.

Inactive Publication Date: 2006-02-22
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the military, it is sometimes required to track a fast-moving target. If the image acquisition rate is not enough, the target will escape from the field of view before the image acquisition is completed, resulting in the loss of the target. In this way, the fast-moving target cannot be tracked. This puts forward higher requirements on the acquisition speed of the image acquisition system
For the above-mentioned target tracking syst

Method used

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  • Method for increasing CCD image collection system frame rate
  • Method for increasing CCD image collection system frame rate
  • Method for increasing CCD image collection system frame rate

Examples

Experimental program
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Example Embodiment

[0075] Example 1-TC237B frame transfer CCD

[0076] See first Figure 4 with Figure 6 , Figure 4 It is the structure diagram of TC237B CCD, Figure 6 It is a schematic diagram of the position of the sub-window of the present invention.

[0077] Before introducing the specific implementation of "sub-window working mode", first explain some terms used in the present invention:

[0078] The “position” is the coordinate of the sub-window 1109 relative to the reference point on the photosensitive surface of the CCD. For example, the pixel at the lower left corner of the imaging area 11 is taken as the reference point, that is, the coordinate origin 1108. The point representing the position of the window is the point at the lower left corner of the window, which is called the "first pixel" 115. In this way, the position of the sub-window 1109 can be represented by the coordinate value of the first pixel 115 of the sub-window relative to the coordinate origin 1108. There are many ways ...

Example Embodiment

[0095] Example 2-Interval transfer type CCD

[0096] The method of the present invention for increasing the frame rate of a CCD image acquisition system includes the following steps for an interlaced transfer type CCD:

[0097] ① The user sets a sub-window with the first pixel coordinates (i, j) and the size of m rows×n columns in the imaging bar of M rows×N columns through commands;

[0098] ②The driving pulse of the following sequence of CCD applied to the CCD by the CCD driver:

[0099] Q 2 →Z 2 →(jX 2 )→m(X 2 →(i+n)D 2 ]→(M-j-m)X 2 , The CCD will output a frame of the image of the sub-window, where:

[0100] Q 2 The clearing pulse is a pulse applied to the clearing pin of the interlace transfer type CCD to clear the CCD imaging bar. After clearing, the CCD exposure bar is automatically exposed to generate a charge corresponding to the scene;

[0101] Z 2 Is the interlace transfer type CCD frame translation pulse, Z 2 A combined pulse of an imaging pulse and a storage pulse on ...

Example Embodiment

[0105] Example 3-Full-frame CCD

[0106] The method of the present invention for increasing the frame rate of a CCD image acquisition system, for a full-frame CCD, includes the following steps:

[0107] ① Set up a sub-window with the first pixel coordinate (i, j) and the size of m rows×n columns in the imaging area of ​​M rows×N columns through commands;

[0108] ②The driving pulse of the following sequence of CCD applied to the CCD by the CCD driver:

[0109] Q 3 →(jX 3 )→m(X 3 →(i+n)D 3 ], the CCD will output a frame of the image of the sub-window, where:

[0110] Q 3 It is a full-frame CCD clearing pulse, which makes the CCD imaging area clear, the exposure area of ​​the CCD starts to be exposed, and the exposure area generates a charge corresponding to the scene;

[0111] X 3 Is a full-frame CCD line translation pulse, X 3 Represents the combined pulse of an imaging pulse applied to the pin of the imaging area of ​​the CCD and a serial pulse of the control pin of the serial sh...

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Abstract

The invention relates to a method for improving the frame rate of CCD image collecting system. The invention sets the interested region of CCD imaging region as the sub-window according to the need of user, which comprises the first pixel coordinate (I, j) and the its size (m rows X n lines); the invention drives the CCD operate in the sub-window operational mode as only outputting the pixels of said sub-window from the CCD while the pixels outside the sub-window are distinguished inside the CCD chip. So the processing time of each frame image is reduced, and the frame rate is improved. In addition, since the size and the position coordinate of said interested region can be adjusted freely according to the need of user, the adaptability of CCD image collecting device is increased.

Description

technical field [0001] The invention relates to CCD image acquisition, in particular to a method for increasing the frame rate of a CCD image acquisition system. Background technique [0002] According to the internal structure of the area array CCD, it can be divided into three types: frame transfer CCD, interline transfer CCD and full frame CCD. In a common CCD image acquisition device, the CCD image sensor chips in it all work in the normal working mode. For the above three different types of CCD chips, the specific working process of their common working mode is described as follows: [0003] (1) frame transfer type (frame transfer) CCD, its structure is as follows figure 1 As shown, the moving direction of the induced charge is shown by the arrow, 101 is the imaging area (M rows × N columns), 102 is the storage area (M rows × N columns), 103 is the serial shift register, 104 is the output sensor, 105 It's clearing the gutter. [0004] In normal working mode, the pul...

Claims

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Application Information

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IPC IPC(8): H04N3/15H01L27/148H04N5/335H04N5/341
Inventor 秦世博董作人叶青韩泽华方祖捷瞿荣辉
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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