CN106651738B - Conversion method from analog image to digital image of microfilm digital reader - Google Patents
Conversion method from analog image to digital image of microfilm digital reader Download PDFInfo
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- CN106651738B CN106651738B CN201611167848.9A CN201611167848A CN106651738B CN 106651738 B CN106651738 B CN 106651738B CN 201611167848 A CN201611167848 A CN 201611167848A CN 106651738 B CN106651738 B CN 106651738B
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- reader
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T9/00—Image coding
Abstract
The invention discloses a method for converting an analog image into a digital image by a microfilm digital reader, which comprises the following steps: connecting the USB interface of the reader to the PC end of the computer; software of the reader starts an image acquisition thread, requests a USB acquisition camera to read in a data packet and transmits the data packet to a PC (personal computer) end; the PC end of the computer judges whether to obtain a data packet read in by the USB acquisition camera, the software of the reader judges whether to interrupt acquisition, if not, the reader stores an image, if so, the software of the reader starts a display thread and then encodes image data and displays a frame of image; the software of the reader restarts the image acquisition thread and repeats the above steps. The image quality of the image converted by the image conversion method is clear, and the distortion condition can not occur; in addition, the converted image display of the present invention does not exhibit quantization noise.
Description
Technical Field
The invention relates to the technical field of digital readers, in particular to a method for converting an analog image into a digital image of a microfilm digital reader.
Background
At present, the display of the existing digital reader for microfilm is a digital display, so it is necessary to convert the analog image into a digital image for displaying, and at present, the method for converting the image display format basically performs a/D conversion on the analog image signal, converts the analog image signal into a digital image signal, then stores the digital image signal, and performs adding and subtracting processes on the image signal and adding or subtracting processes on the frame image signal by using the digital processing technology, and the above processing method has the following disadvantages: the converted image display may be distorted, or the image display may generate quantization noise, etc.
Disclosure of Invention
The invention aims to provide a method for converting an analog image into a digital image by a microfilm digital reader, so as to overcome the defects in the prior art.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
the method for converting the analog image to the digital image of the microfilm digital reader comprises the following steps:
s1: connecting the USB interface of the reader to the PC end of the computer;
s2: the PC side detects whether the USB interface of the reader is connected to the PC side, if not, the PC side displays error information, and if so, the PC side moves to S3;
s3: software of the reader starts an image acquisition thread, requests a USB acquisition camera to read in a data packet and transmits the data packet to a PC (personal computer) end;
s4: the PC terminal of the computer judges whether a data packet read by the USB acquisition camera is obtained, if not, the software of the reader requests the USB acquisition camera to read the data packet again and transmits the data packet to the PC terminal of the computer; if so, move to S5;
s5: the software of the reader identifies that the PC end of the computer has not read a frame, if not, the software of the reader requests the USB acquisition camera to read in the data packet again and transmits the data packet to the PC end of the computer, and if so, S6 is executed;
s6: judging whether the acquisition is interrupted or not by the software of the reader, if not, storing the image by the reader, and if so, executing S7;
s7: the method comprises the steps that after software of a reader starts a display thread, image data are coded, and a frame of image is displayed;
s8: the reader' S software starts the image acquisition thread again and repeats steps S3-S7.
Further, the step S3 further includes:
s3.1: starting an image acquisition thread by the software of the reader;
s3.2: software of the reader distributes an input/output buffer area of a PC end of a computer;
s3.3: the PC end of the computer configures the control of input and output;
s3.4: the software of the reader requests the USB acquisition camera to read in the data packet and transmits the data packet to the PC end of the computer.
After the technical scheme is adopted, the invention has the following beneficial effects: the image quality of the image converted by the image conversion method is clear, and the distortion condition can not occur; in addition, the converted image display of the present invention does not exhibit quantization noise.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a flow chart of a method of converting an analog image into a digital image according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
As shown in fig. 1, the method for converting an analog image to a digital image of a microfilm digital reader according to an embodiment of the present invention includes the following steps:
s1: connecting the USB interface of the reader to the PC end of the computer;
s2: the PC side detects whether the USB interface of the reader is connected to the PC side, if not, the PC side displays error information, and if so, the PC side moves to S3;
s3: software of the reader starts an image acquisition thread, requests a USB acquisition camera to read in a data packet and transmits the data packet to a PC (personal computer) end;
s4: the PC terminal of the computer judges whether a data packet read by the USB acquisition camera is obtained, if not, the software of the reader requests the USB acquisition camera to read the data packet again and transmits the data packet to the PC terminal of the computer; if so, move to S5;
s5: the software of the reader identifies that the PC end of the computer has not read a frame, if not, the software of the reader requests the USB acquisition camera to read in the data packet again and transmits the data packet to the PC end of the computer, and if so, S6 is executed;
s6: judging whether the acquisition is interrupted or not by the software of the reader, if not, storing the image by the reader, and if so, executing S7;
s7: the method comprises the steps that after software of a reader starts a display thread, image data are coded, and a frame of image is displayed;
s8: the reader' S software starts the image acquisition thread again and repeats steps S3-S7.
Wherein, the step S3 further includes:
s3.1: starting an image acquisition thread by the software of the reader;
s3.2: software of the reader distributes an input/output buffer area of a PC end of a computer;
s3.3: the PC end of the computer configures the control of input and output;
s3.4: the software of the reader requests the USB acquisition camera to read in the data packet and transmits the data packet to the PC end of the computer.
The image quality of the image converted by the image conversion method is clear, and the distortion condition can not occur; in addition, the converted image display of the present invention does not exhibit quantization noise.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (2)
1. The method for converting the analog image into the digital image by the microfilm digital reader is characterized by comprising the following steps:
s1: connecting the USB interface of the reader to the PC end of the computer;
s2: the PC side detects whether the USB interface of the reader is connected to the PC side, if not, the PC side displays error information, and if so, the PC side moves to S3;
s3: software of the reader starts an image acquisition thread, requests a USB acquisition camera to read in a data packet and transmits the data packet to a PC (personal computer) end;
s4: the PC terminal of the computer judges whether a data packet read by the USB acquisition camera is obtained, if not, the software of the reader requests the USB acquisition camera to read the data packet again and transmits the data packet to the PC terminal of the computer; if so, move to S5;
s5: the software of the reader identifies that the PC end of the computer has not read a frame, if not, the software of the reader requests the USB acquisition camera to read in the data packet again and transmits the data packet to the PC end of the computer, and if so, S6 is executed;
s6: judging whether the acquisition is interrupted or not by the software of the reader, if not, storing the image by the reader, and if so, executing S7;
s7: the method comprises the steps that after software of a reader starts a display thread, image data are coded, and a frame of image is displayed;
s8: the reader' S software starts the image acquisition thread again and repeats steps S3-S7.
2. The method for converting an analog image to a digital image of a microfilm digital reader as recited in claim 1, wherein said step S3 further comprises:
s3.1: starting an image acquisition thread by the software of the reader;
s3.2: software of the reader distributes an input/output buffer area of a PC end of a computer;
s3.3: the PC end of the computer configures the control of input and output;
s3.4: the software of the reader requests the USB acquisition camera to read in the data packet and transmits the data packet to the PC end of the computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611167848.9A CN106651738B (en) | 2016-12-16 | 2016-12-16 | Conversion method from analog image to digital image of microfilm digital reader |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611167848.9A CN106651738B (en) | 2016-12-16 | 2016-12-16 | Conversion method from analog image to digital image of microfilm digital reader |
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| Publication Number | Publication Date |
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| CN106651738A CN106651738A (en) | 2017-05-10 |
| CN106651738B true CN106651738B (en) | 2020-06-12 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103353A (en) * | 1987-05-05 | 1988-01-20 | 张明 | Portable microfilm reader |
| US5790260A (en) * | 1995-11-08 | 1998-08-04 | Financial Ware, Inc. | Offline digitizing of items for subsequent image processing |
| CN102117342A (en) * | 2011-01-21 | 2011-07-06 | 中国科学院上海技术物理研究所 | Peripheral component interconnect (PCI) Express bus-based multiband infrared image real-time acquisition system and method |
| CN102256105A (en) * | 2010-05-21 | 2011-11-23 | 安凯(广州)微电子技术有限公司 | Method for capturing images by using multiple cameras on embedded platform |
| CN106210745A (en) * | 2016-08-31 | 2016-12-07 | 成都市和平科技有限责任公司 | A kind of intelligent jpeg image coding/decoding system and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090092339A1 (en) * | 2007-10-03 | 2009-04-09 | Anderson Jr Thomas P | Viewing and Scanning of Microfilm Using a Self-Contained Digital Device Without a Personal Computer |
-
2016
- 2016-12-16 CN CN201611167848.9A patent/CN106651738B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103353A (en) * | 1987-05-05 | 1988-01-20 | 张明 | Portable microfilm reader |
| US5790260A (en) * | 1995-11-08 | 1998-08-04 | Financial Ware, Inc. | Offline digitizing of items for subsequent image processing |
| CN102256105A (en) * | 2010-05-21 | 2011-11-23 | 安凯(广州)微电子技术有限公司 | Method for capturing images by using multiple cameras on embedded platform |
| CN102117342A (en) * | 2011-01-21 | 2011-07-06 | 中国科学院上海技术物理研究所 | Peripheral component interconnect (PCI) Express bus-based multiband infrared image real-time acquisition system and method |
| CN106210745A (en) * | 2016-08-31 | 2016-12-07 | 成都市和平科技有限责任公司 | A kind of intelligent jpeg image coding/decoding system and method |
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| CN106651738A (en) | 2017-05-10 |
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