Industrial camera based on interline transfer CCD
An industrial camera, a transfer-type technology, applied to color TV parts, TV system parts, TVs, etc., to achieve the effect of saving circuit hardware costs and saving circuit board space
Active Publication Date: 2018-06-29
BEIJING DAHENG IMAGE VISION +1
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Problems solved by technology
[0005] The present invention aims at the problem that existing industrial cameras need to design a separate external buffer, and proposes a low-cost industrial camera using an interline transfer CCD (Interline CCD)
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[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and the embodiments thereof, but the protection scope of the present invention is not limited to the scope described in the embodiments.
[0031] figure 1 It shows the readout structure of the row-by-column transfer CCD used in the industrial camera of the present invention.
[0032] Such as figure 1 Shown, wherein 1, 2, 3 represent a step of the CCD readout process respectively. 1 is the transfer from the image sensitive area to the vertical shift register (or row register), 2 is the transfer from the vertical shift register to the horizontal shift register (or column register), and 3 is the readout of the horizontal shift register.
[0033] The system structure of industrial camera of the present invention is as figure 2 As shown, it includes a digital-to-analog conversion (AD) module, a line buffer module, an external interface module and a CCD timing generation ...
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The invention discloses an industrial camera based on an interline transfer CCD. The industrial camera comprises an interline transfer CCD, an analog-to-digital conversion module, a line buffer module, a CCD time sequence generation module, and an external interface module, wherein the interline transfer CCD comprises an image sensitive area, a horizontal register, and a vertical register. When data transmission congestion occurs, a low-cost industrial camera can directly buffer and store data without using an external memory due to the line buffer module capable of storing two lines of pixelof the CCD, thereby preventing image data loss caused by decrease of instantaneous transmission bandwidth. Compared with traditional frame buffer manner, the industrial camera takes the advantage of the specific feature of the interline transfer CCD, thereby solving a data congestion problem caused by decrease of instantaneous effective bandwidth through time sequence control, saving circuit hardware cost, making circuit design less complex, and saving a circuit board space of a product.
Description
technical field [0001] The present invention relates to a field of image acquisition, in particular to a method of utilizing the structural characteristics of a CCD (Charge-coupled Device) to realize data buffering and storage directly without the aid of an external memory when data transmission is blocked. Low-cost industrial cameras that drop image data loss. Background technique [0002] In the transmission system of industrial cameras, due to the time allocation of the host operating system, the performance of peripheral drivers, and the shared interface bandwidth of multiple industrial cameras, the instantaneous bandwidth of data transmission will drop, resulting in instantaneous blocking, and the blocking time generally does not exceed 1ms . In order to ensure that the image data is not lost when the transmission is blocked, the image data needs to be buffered inside the industrial camera. [0003] The existing methods for image buffering of industrial cameras are ma...
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IPC IPC(8): H04N5/372H04N5/378
CPCH04N25/713H04N25/75
Inventor 宋伟铭张强罗松彬周中亚
Owner BEIJING DAHENG IMAGE VISION