Area Sensor Region of Interest Adjustment for Microfilm Image Mark Detection
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Solution Overview
Problem
Existing microform imaging systems face challenges in efficiently locating specific documents within large rolls of microfilm due to the time-consuming process of manually searching through thousands of images, and existing methods for reading image marks on microfilm are prone to inaccuracies if the film is not properly aligned.
Innovation Solution
A digital microform imaging apparatus equipped with an area sensor that can adjust its region of interest and transport rate to accurately sense and locate image marks on microfilm, allowing for faster document retrieval and improved accuracy by determining the vertical location and dimensions of the marks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If manual searching through microfilm is used to locate documents, then no additional equipment is needed, but search time becomes extremely long when thousands of images are present
Solution Approach 1:
The system uses the area sensor to automatically detect and read image marks on the microfilm, enabling the system to self-locate documents without manual intervention. The sensor continuously monitors the film as it passes through, automatically identifying image mark positions and providing location information to the controller.
Solution Approach 2:
The patent replaces the manual mechanical searching process with an automated optical sensing system. The area sensor optically detects image marks on the microfilm, converting a manual mechanical task into an automated optical-electronic process that significantly reduces search time.
2Extent of automation
If dedicated optical sensors are used to read image marks, then automatic document location is achieved, but the system becomes complex and expensive
Solution Approach 1:
The area sensor serves multiple functions: it captures images of documents on the microfilm and simultaneously detects image marks for automatic location. This multi-functionality eliminates the need for separate dedicated sensors, reducing system complexity while maintaining automation capabilities.
Solution Approach 2:
The patent combines the document imaging function and image mark detection function into a single area sensor system. By merging these two functions, the system reduces component count and complexity while achieving automatic document location capability.
3Productivity
If film is advanced quickly to speed up searching, then search time is reduced, but accuracy of locating specific documents decreases
Solution Approach 1:
The area sensor provides continuous feedback about image mark positions as the film passes through the system. The controller uses this real-time feedback to accurately determine document locations even when the film is moving at higher speeds, maintaining precision while improving search speed.
4Extent of automation
If traditional optical sensors are used to read image marks, then automatic location is possible, but inaccuracies occur when film is not properly aligned
Solution Approach 1:
The area sensor can adjust its region of interest and transport rate parameters to accommodate variations in film alignment. By dynamically changing these parameters, the system maintains reliable image mark detection even when the film is not perfectly positioned.
Solution Approach 2:
The system dynamically adjusts the area sensor's region of interest based on the detected position of image marks on the film. This dynamic adaptation allows the system to maintain accurate reading capability despite variations in film alignment or positioning.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables rapid and precise location of desired documents on microfilm rolls, reducing search time and enhancing the reliability of image mark detection, even when the film is not perfectly aligned.
Implementation Method 1
sensing at least one image mark on the microform using the area sensor
Data Source
AI summary
Systems and methods use a digital microform imaging apparatus for sensing an image mark on the microform containing the image of a document. The use of an area sensor with an adjustable region of interest can be used to improve the detection speed of image marks as a roll of microform is being transported.