Dimension Measurement Device Using Distortion Correction Markers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing dimension measurement devices face challenges in accurately determining the size of measurement objects due to image distortion, particularly when using imagers with wide-angle lenses, which affects the precision of length, width, and height measurements.
Innovation Solution
The dimension measurement device incorporates a storage receptacle with markers and a reference corner point, along with an imager and image processor that performs distortion correction by binarizing images, recognizing markers, and applying distortion correction data to accurately measure object dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a wide-angle lens is used in the imager to capture images of measurement objects in the storage receptacle, then the field of view and coverage are improved, but image distortion increases which degrades measurement precision
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing distortion correction data for various positions within the storage receptacle before actual measurement. The image processor retrieves and applies the appropriate correction data based on the measured object's location, thereby compensating for wide-angle lens distortion and restoring measurement accuracy while maintaining the broad field of view.
Solution Approach 2:
The patent changes the parameter of image data by applying distortion correction transformations. The image processor modifies the captured image parameters (pixel coordinates, spatial relationships) using pre-calculated correction data, converting distorted wide-angle images into geometrically corrected images that enable accurate dimension measurements.
2Measurement precision
If distortion correction processing is applied to images captured by the imager, then measurement precision is improved, but device complexity and processing time increase
Solution Approach 1:
The patent reduces processing complexity by performing the computationally intensive distortion correction calculations in advance. The correction data is pre-computed and stored in a lookup table, allowing the image processor to simply retrieve and apply pre-determined correction values rather than performing complex real-time distortion calculations, thereby maintaining measurement precision while simplifying the actual measurement process.
3Measurement precision
If multiple markers are placed on the storage receptacle surfaces for distortion correction, then measurement accuracy is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies universality by designing markers that serve multiple functions: they act as both geometric reference points for distortion correction and as visual indicators for proper object placement. This multi-functionality reduces the need for separate placement markers and simplifies the overall manufacturing process while maintaining high measurement accuracy through precise distortion correction.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
An object of the present invention is to provide a dimension measurement device with the ability to accurately determine a size of a measurement object, a parcel locker system including such a dimension measurement device, and a dimension measurement method. A dimension measurement device (101) according to the present invention includes: a storage receptacle (111); an imager (103) configured to capture an image of a measurement object (150) to be stored in the storage receptacle (111); and an image processor configured to process the image captured by the imager (103). The storage receptacle (111) includes: a rectangular lower surface (1201); a rectangular first side surface (1242); and a rectangular second side surface (1232). The storage receptacle (111) further includes: a first concave corner (112) formed by the lower surface (1201) and the first side surface (1242); a second concave corner (113) formed by the lower surface (1201) and the second side surface (1232); and a third concave corner (114) formed by the first side surface (1242) and the second side surface (1232). The storage receptacle (111) further includes a reference corner point (115) formed at an intersection between the first concave corner (112), the second concave corner (113), and the third concave corner (114). The storage receptacle (111) further includes markers (116) indicating locations of respective sides of the first side surface (1242), the second side surface (1232), and the lower surface (1201).