Distance measuring equipment
First Claim
1. A distance measuring device comprising first and second receiving means for receiving radiation from an object along different optical paths, said receiving means generating first and second groups of signals, quantizing means for quantizing said signals, said quantizing means generating first and second quantized data rows responsive to said first and second groups of signals, means for shifting at least one of said first and second rows, means for correlating a coincidence between said first and second rows each time after said shifting is completed, means for obtaining at least one shift rate which indicates a maximum coincidence, and judging means for judging a condition wherein said first and second rows are not reliable for obtaining the distance, said condition being detected based on said first group of signals which have first values and second group of signals which have second values, said first and second values corresponding to first and second distributions of said radiation, said judging means generating a first signal when said condition is detected.
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Accused Products
Abstract
A distance measuring equipment wherein two images of an object are received on photosensor arrays each, two image data rows indicating a luminous intensity distribution in the object are compared with each other, and a distance to the object is measured from a mutual shift rate of both the signal rows which is required for bringing both the signal rows into coincidence at high correlation. A presence of the shift rate whereat the both image data rows indicate a high correlation is detected when it is present plurally, a part of the plural shift rate including a shift rate corresponding to the highest correlation is stored and taken.
13 Citations
25 Claims
- 1. A distance measuring device comprising first and second receiving means for receiving radiation from an object along different optical paths, said receiving means generating first and second groups of signals, quantizing means for quantizing said signals, said quantizing means generating first and second quantized data rows responsive to said first and second groups of signals, means for shifting at least one of said first and second rows, means for correlating a coincidence between said first and second rows each time after said shifting is completed, means for obtaining at least one shift rate which indicates a maximum coincidence, and judging means for judging a condition wherein said first and second rows are not reliable for obtaining the distance, said condition being detected based on said first group of signals which have first values and second group of signals which have second values, said first and second values corresponding to first and second distributions of said radiation, said judging means generating a first signal when said condition is detected.
- 2. A distance measuring device comprising, first and second receiving means for receiving radiation from an object along different optical paths, said receiving means generating first and second groups of signals, quantizing means for quantizing said signals, said quantizing means generating first and second quantized data rows responsive to said first and second groups of signals, means for shifting at least one of said first and second rows, means for correlating a coincidence between said first and second rows each time after said shifting is completed, means for obtaining at least one shift rate which indicates a maximum coincidence and judging means for judging a condition wherein said shift rate indicating said maximum coincidence is plural, said judging means generating a signal when said condition is detected.
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25. A distance measuring device comprising:
- first and second receiving means for receiving radiation from an object along different optical paths, said receiving means generating first and second groups of signals, quantizing means for quantizing said signals, said quantizing means generating first and second quantized data rows responsive to said first and second groups of signals, means for shifting at least one of said first and second rows, means for correlating a coincidence between said first and second rows each time after said shifting is completed, means for obtaining at least one first shift rate which indicates a maximum coincidence and judging means for detecting a condition wherein said first shift rate is plural, said judging means generating a signal when said condition is detected, means for obtaining at least one second shift rate which indicates a maximum coincidence and means for storing said first shift rate and second shift rate.
Specification