Abstract
Image magnification often results in disorientation through loss of orientation and location during inspection. This study investigated the effects of three different magnification modes viz. full screen, circular, and fixed-area on visual inspection performance. Also, to improve participants’ global orientation with respect to the original product, location cues in the form of halftone landmarks were introduced as a job aid and their effectiveness on inspection performance was examined. Twenty-eight undergraduates participated in the experiment. Significant magnification mode effect was found, but the location cue effect was found non-significant. The results suggested that the presentation of content/contextual information on one single screen should be considered together with the nature of the visual task and participants’ search behaviors, and that the aid of location cues might be useful when the visual task demanded a high level of search memory and/or an unsystematic search strategy was employed by inspectors.
Highlights
Visual inspection is one of the quality control processes in manufacturing industry and plays an important role in our daily live [1,2,3,4]
The time elapsed from the onset of the stimulus image to the left-clicking on the perceived target position or the press of ‘N’ key to indicate target absence was taken as the inspection time (IT) for a trial
This study showed a significant magnification mode effect and a non-significant location cue effect on visual inspection performance
Summary
Visual inspection is one of the quality control processes in manufacturing industry and plays an important role in our daily live [1,2,3,4]. Previous studies have focused on obtaining an indepth understanding of and improving human visual related task performance from a diversity of perspectives. Yu and Yang [5] conducted a study to examine the agerelated changes in visual lobe shape characteristics and its relationships to visual search performance. Schwandt [7] found that the performance of joint visual search can be improved by employing a tactile or an auditory display to exchange gaze information about the search partner. With miniaturization of electronic and mechanical components of consumer products, video magnifiers have been designed for human visual inspection. The product to be inspected is placed under a camera and the magnified image is presented on a display.
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