GB692923A - Method of measuring an object by photography - Google Patents

Abstract

692,923. Measuring by photography; photographic projection printing apparatus. EASTMAN KODAK CO. July 8, 1948 [Feb. 4, 1948], No. 18436/48. Classes 97 (i), 98 (i) and 98 (ii). A method of producing a photographic record of an object, especially of a person, and from which record measurements may be taken for use in tailoring, includes the steps of photographing at least two aspects of the object; determining by inspection of one aspect the displacement, e.g. due to defects in posture, of the object relatively to the object plane of the camera; and relatively and independently positioning the image or the other aspect or aspects in a projection printing apparatus relatively to a light-sensitive material to compensate for said displacement and bring all the images to the same scale when making a print on said material of the several aspects. As shown, front, rear and profile views 54, 55, 56 of a man who may wear a harness of measuring tapes positioned on a support 25 by foot-guides 26 and lit by hooded lamps 50 are recorded in a camera 37 to the same scale by means of pairs of mirrors 34, 36; 42, 43; and 35, 40; together with an overhead view 57 reflected by mirrors 44, 45. The support 26 and a ring 30 define a right circular cylinder and carry marks 32, 33, Fig. 3 (not shown), arranged in quadrature, defining perpendicular vertical planes. These marks together with a cross 48 on the mirror 44 permit determination of the posture of the man, corrections for which are made in printing from the camera record, together with corrections for small maladjustments of the studio apparatus. The camera record is inspected either directly or in a projection viewer having a screen on which are etched a foot line and a line defining in the image of view 57 the middle longitudinal plane of the body, or in a projection printer, Fig. 7, into the sensitive material holder of which a similarly etched plate may be inserted. The. negative holder 77 comprises a hinged frame 85 urged shut by a spring 87 and carried by a disc 84 rotatable in a counter-sunk hole in a plate 82 in which it is retained by lugs 831, the plate 82 being vertically movable in guides 81 carried by plates 80 horizontally movable in guides 79 on a plate 78 fixed to a lamphouse 71. Horizontal and vertical adjustments of the plate 82 and rotation of the frame 85 are effected by thumb-screws 88, 92, 96. The projection lens 102 is mounted for vertical adjustment against springs 116 on a carriage 106 by thumb-screws 117, said carriage being similarly adjustable for focusing on a fixed support by thumb-screws 110. The light-sensitive plate-holder comprises a frame 136 apertured at 137 and provided with plate-retaining spring fingers 142, a locating stop 141 and a locating spring 143 together with a guideway 138 having retaining spring clips 144 for a mask as 159 apertured at 160. The frame 136 is slidably carried on a squared rod 147 secured to cranks 148 pivoted at 150, 152 on a supporting frame 124, the rod 147 being rotatable by means of an arm 153 to tilt the plate holder an amount indicated by a scale and pointer 155, 154, and being locked by a thumbnut 151. The supporting frame 124 is mounted on a turntable 129 which may be locked to a plate 123 by a wing-nut and bolt, the plate 123 being secured by blocks 122 to threaded rods 119 having locking-nuts 121 journalled in threaded portions of a support fixed to the baseplate 70 of the printer so that the plate 123 can be moved perpendicularly across the axis of the printer. Each of the views 54 ... 56 is printed in turn, an appropriate mask being employed in the frame 136 which must be slid along the rod 147 so as to centre the middle of the mask aperture on the turntable pivot before the mask can be slid home. Corrections for incorrect positioning of the views on the camera record are made by adjustment of the negative holder, while incorrect posture is allowed for by tilting the frame 136 to correct for forward or backward leaning of the subject, determined from the profile view 54, and by rotating the turntable 129 to correct for the subject facing laterally of the back-to-front direction defined by the vertical plane through marks 32, 33, determined from overhead view 57. The overhead view which is not used for measuring may be printed simultaneously with the rear view 56. The corrected print thus made is then projected to a selected scale of enlargement on to an easel providing with crossed measuring sticks adjustable by weights and pulleys. Specifications 692,971, 692,972 and 692,973 are referred to.