In recent years, three-dimensional (3D) displays become more and more popular in many fields. Although they can provide better viewing experience, they cause extra problems, e.g., visual fatigue. Subjective or objective methods are usually used in discrete viewing processes to evaluate visual fatigue. However, little research combines subjective indicators and objective ones in an entirely continuous viewing process. In this paper, we propose a method to evaluate real-time visual fatigue both subjectively and objectively. Subjects watch stereo contents on a polarized 3D display continuously. Visual Reaction Time (VRT), Critical Flicker Frequency (CFF), Punctum Maximum Accommodation (PMA) and subjective scores of visual fatigue are collected before and after viewing. During the viewing process, the subjects rate the visual fatigue whenever it changes, without breaking the viewing process. At the same time, the blink frequency (BF) and percentage of eye closure (PERCLOS) of each subject is recorded for comparison to a previous research. The results show that the subjective visual fatigue and PERCLOS increase with time and they are greater in a continuous process than a discrete one. The BF increased with time during the continuous viewing process. Besides, the visual fatigue also induced significant changes of VRT, CFF and PMA.
Existing image pyramid data structures have certain limitations. Some need much more storage space than
original images; some are unable to reconstruct original images accurately; the others result in bad visual qualities. In
this paper, a type of modified reduced-sum pyramid (MRSP) is proposed. In such a pyramid, every father-node can be
got by adding a certain integer to one of its son-nodes, and the son-node can also be got by subtracting the same integer
from the father-node. This integer is calculated using the neighboring nodes of the son-node. This type of pyramid has
many possible implementations; they all fulfill the same general formula, but use different approaches to calculate the
integer. One implementation, based on the technique of image inpainting, is also presented in this paper. Theoretical
analysis and experiments demonstrate that the proposed pyramid achieves good performance in precision, storage space
and visual quality.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.