In a distance-measuring device that measures individual distances to plural distance-measured regions, a selection circuit selects at least one first measured distance value by excluding second measured distance values that are not smaller than a predetermined distance value from the individually me
In a distance-measuring device that measures individual distances to plural distance-measured regions, a selection circuit selects at least one first measured distance value by excluding second measured distance values that are not smaller than a predetermined distance value from the individually measured distance values to the plural distance measured regions. An auto-focusing data value is computed in accordance with the selected first measured distance values.
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1. A distance-measuring device for individually measuring a plurality of distance-values corresponding to a respective plurality of distance-measured regions, the plurality of distance-measured regions constituting all distance-measurable regions of the distance-measuring device, the distance-measur
1. A distance-measuring device for individually measuring a plurality of distance-values corresponding to a respective plurality of distance-measured regions, the plurality of distance-measured regions constituting all distance-measurable regions of the distance-measuring device, the distance-measuring device comprising:a selection circuit for selecting at least one first measured distance-value from the plurality of distance-values, wherein the selection is effected such that in the case that more than one of the plurality of distance-values have been determined to be greater than or equal to a predetermined distance-value, the distance-values that have been determined to be greater than or equal to the predetermined distance-value are excluded, and other distance-values of the plurality of distance-values that have not been determined to be greater than or equal to the predetermined distance-value are not excluded; anda computation circuit for computing an auto-focusing data value in accordance with the at least one first measured distance-value selected by said selection circuit. 2. A distance-measuring device according to claim 1, wherein said computation circuit sets the auto-focusing data value to a value equal to a minimum permissible distance-value in response to a determination that the computed auto-focusing data value is smaller than the minimum permissible distance-value. 3. A distance-measuring device according to claim 1, wherein said computation circuit computes the auto-focusing data value from a mean value of the at least one first measured distance-value selected by said selection circuit. 4. A distance-measuring device according to claim 1, wherein said computation circuit computes the auto-focusing data value from a majority of the at least one first measured distance-value selected by said selection circuit. 5. A distance-measuring device according to claim 1, wherein the predetermined distance-value is obtained from a focal distance of a lens used for auto-focusing. 6. A distance-measuring device according to claim 1, wherein the predetermined distance-value is obtained from an aperture value of a lens used for auto-focusing. 7. A distance-measuring device according to claim 1, wherein a smallest measured distance-value serves as the auto-focusing data value when all of the plurality of distance-values have been determined to be greater than or equal to the predetermined distance-value and are not selected by the selection circuit. 8. A camera including a distance-measuring device for individually measuring a plurality of distance-values corresponding to a respective plurality of distance-measured regions, the plurality of distance-measured regions constituting all distance-measurable regions of the distance-measuring device, and camera comprising:a selection circuit for selecting at least one first measured distance-value from the plurality of distance-values, wherein the selection is effected such that in the case that more than one of the plurality of distance-values have been determined to be greater than or equal to a predetermined distance-value, the distance-values that have been determined to be greater than or equal to the predetermined distance-value are excluded, and other distance-values of the plurality of distance-values that have not been determined to be greater than or equal to the predetermined distance-value are not excluded;a computation circuit for computing an auto-focusing data value in accordance with the at least one first measured distance-value selected by said selection circuit; anda driving circuit for driving an image-forming lens in accordance with the auto-focusing data value computed by the computation circuit. 9. A camera according to claim 8, wherein said computation circuit sets the auto-focusing data value to a value equal to a minimum permissible distance-value in response to a determination that the computed auto-focusing data value is smaller than the minimum permi ssible distance-value. 10. A method of individually measuring a plurality of distance-values corresponding to a respective plurality of distance-measured regions by a distance-measuring device, the plurality of distance-measured regions constituting all distance-measurable regions of the distance-measuring device, said method comprising the steps of:selecting at least one first measured distance-value from the plurality of distance-values, wherein the selection is effected such that in the case that more than one of the plurality of distance-values have been determined to be greater than or equal to a predetermined distance-value, the distance-values that have been determined to be greater than or equal to the predetermined distance-value are excluded, and other distance-values of the plurality of distance-values that have not been determined to be greater than or equal to the predetermined distance-value are not excluded; andcomputing an auto-focusing data value in accordance with the selected at least one first measured distance-value. 11. A measuring method according to claim 10, wherein said computing step includes setting the auto-focusing data value to a value equal to a minimum permissible distance-value in response to a determination that the computed auto-focusing data value is smaller than the minimum permissible distance-value. 12. A measuring method according to claim 10, wherein said computing step includes computing the auto-focusing data value from a mean value of the selected at least one first measured distance-value. 13. A measuring method according to claim 10, wherein said computing step includes computing the auto-focusing data value from a majority or the selected at least one first measured distance-value. 14. A computer usable medium for use with a distance-measuring device for individually measuring a plurality of distance-values corresponding to a respective plurality of distance-measured regions, the plurality of distance-measured regions constituting all distance-measurable regions of the distance-measuring device, said computer usable medium having computer readable program code units embodied therein comprising:a first program code unit for selecting at least one first measured distance-value from the plurality of distance-values, wherein the selection is effected such that in the case that more than one of the plurality of distance-values have been determined to be greater than or equal to a predetermined distance-value, the distance-values that have been determined to be greater than or equal to the predetermined distance-value are excluded, and other distance-values of the plurality of distance-values that have not been determined to be greater than or equal to the predetermined distance-value are not excluded; anda second program code unit for computing an auto-focusing data value in accordance with the selected at least one first measured distance-value. 15. A computer usable medium according to claim 14, wherein the second program code unit includes a program code unit for setting the auto-focusing data value to a value equal to a minimum permissible distance-value in response to a determination that the computed auto-focusing data value is smaller than the minimum permissible distance-value. 16. A distance-measuring device for individually measuring a plurality of distance-values corresponding to a respective plurality of distance-measured regions, the plurality of distance-measured regions constituting all distance-measurable regions of the distance-measuring device, the distance-measuring device comprising:a selection circuit for selecting at least one measured distance-value for use in focusing, wherein the selection is effected by comparing a first measured distance-value of the plurality of distance-values to a predetermined distance-value, and wherein if the first measured distance-value is greater than or equal to the predetermined distance-value, said selection circuit compares a se cond measured distance-value of the plurality of distance-values to the predetermined distance-value and excludes the first measured distance-value from being selected; anda computation circuit for computing an auto-focusing data value in accordance with the at least one measured distance-value selected by said selection circuit,wherein if the second measured distance-value is greater than or equal to the predetermined distance-value, said selection circuit excludes the second measured distance-value from being selected, andwherein said selection circuit compares measured distance values in descending order to the predetermined distance-value. 17. A distance-measuring device according to claim 16, further comprising an ordering circuit for ordering into a predetermined order the plurality of distance-values before said selection circuit performs the selection. 18. A distance-measuring device according to claim 16, wherein said computation circuit sets the auto-focusing data value to a value equal to a minimum permissible distance-value when the computed auto-focusing data value is smaller than the minimum permissible distance-value. 19. A distance-measuring device according to claim 1, further comprising an ordering circuit for ordering into a predetermined order the plurality of distance-values,wherein said selection circuit performs the selection and exclusion upon the ordered plurality of distance-values in accordance with the predetermined order. 20. A distance-measuring device for individually measuring a plurality of distance-values corresponding to a respective plurality of distance-measured regions, the plurality of distance-measured regions constituting all distance-measurable regions of the distance-measuring device, the distance-measuring device comprising:a selection circuit which selects, from the plurality of distance-values, at least one measured distance-value, not less than the shortest distance-value where focusing operation is possible and not more than a predetermined distance-value, without taking into account the position in the image plane of the plurality of distance-measured regions; anda computation circuit for computing an auto-focusing data value in accordance with the at least one measured distance-value selected by said selection circuit. 21. A distance-measuring device according to claim 20, wherein when said selection circuit selects a plurality of distance-values, and said computation circuit performs the computation of the auto-focusing data value as the average of the plurality of selected distance-values.
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이 특허에 인용된 특허 (8)
Muramatsu Masaru (Kawasaki JPX) Sato Shigemasa (Yokohama JPX) Ohishi Sueyuki (Shinagawa JPX) Otani Tadashi (Ohtawara JPX), Auto focusing apparatus in a camera.
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