SHARPENING OF DRIFTING, BLURRED IMAGES

被引:47
作者
BEX, PJ
EDGAR, GK
SMITH, AT
机构
[1] UNIV WALES COLL CARDIFF, DEPT PSYCHOL, VIS RES UNIT, CARDIFF CF1 3YG, S GLAM, WALES
[2] BRITISH AEROSP PLC, SOWERBY RES CTR, DEPT HUMAN FACTORS, BRISTOL BS12 7QW, AVON, ENGLAND
[3] UNIV LONDON, ROYAL HOLLOWAY & BEDFORD NEW COLL, DEPT PSYCHOL, EGHAM TW20 0EX, SURREY, ENGLAND
关键词
BLUR; DEBLURRING; EDGES; SINE GRATINGS; SHARPENING;
D O I
10.1016/0042-6989(95)00060-D
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The perceived blur of moving images is less than expected given the sluggish temporal response of the visual system. This suggests that a motion deblurring mechanism may exist to preserve the positional acuity and sharpness of moving images. Furthermore, when sequences of blurred stills are presented, observers report that the moving image is in sharp focus raising the possibility that there is a mechanism which may sharpen the appearance of moving, blurred images. We have measured the effects of velocity and contrast on the perceived blur of drifting, blurred images (sine gratings and blurred edges). Subjects matched the perceived blur of drifting, blurred images to that of static, blurred images in a dimly lit room, It was found that perceived blur was inversely related to drift speed and contrast. The results confirm that moving, blurred images may appear sharper than when they are static. This finding is not consistent with some models of motion deblurring since these account only for the preservation of sharp contours that are present in the image and not for the sharp appearance of images that are in fact blurred.
引用
收藏
页码:2539 / 2546
页数:8
相关论文
共 31 条
[1]   BLUR INTO FOCUS [J].
ANDERSON, CH ;
VANESSEN, DC ;
GALLANT, JL .
NATURE, 1990, 343 (6257) :419-420
[2]   SHIFTER CIRCUITS - A COMPUTATIONAL STRATEGY FOR DYNAMIC ASPECTS OF VISUAL PROCESSING [J].
ANDERSON, CH ;
VANESSEN, DC .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1987, 84 (17) :6297-6301
[3]   VISUAL PROCESSING DELAYS ALTER THE PERCEIVED SPATIAL FORM OF MOVING GRATINGS [J].
ANDERSON, SJ .
VISION RESEARCH, 1993, 33 (18) :2733-2746
[4]   RESISTANCE TO POSITIONAL NOISE IN HUMAN VISION [J].
BADCOCK, DR ;
WONG, TL .
NATURE, 1990, 343 (6258) :554-555
[5]   TEMPORAL AND SPATIAL SUMMATION IN HUMAN VISION AT DIFFERENT BACKGROUND INTENSITIES [J].
BARLOW, HB .
JOURNAL OF PHYSIOLOGY-LONDON, 1958, 141 (02) :337-350
[6]   MOTION SMEAR [J].
BURR, D .
NATURE, 1980, 284 (5752) :164-165
[7]   VISUAL PROCESSING OF MOTION [J].
BURR, D ;
ROSS, J .
TRENDS IN NEUROSCIENCES, 1986, 9 (07) :304-307
[8]   SEEING OBJECTS IN MOTION [J].
BURR, DC ;
ROSS, J ;
MORRONE, MC .
PROCEEDINGS OF THE ROYAL SOCIETY SERIES B-BIOLOGICAL SCIENCES, 1986, 227 (1247) :249-265
[9]   CONTRAST SENSITIVITY AT HIGH VELOCITIES [J].
BURR, DC ;
ROSS, J .
VISION RESEARCH, 1982, 22 (04) :479-484
[10]   CONTRAST CONSTANCY - DEBLURRING IN HUMAN VISION BY SPATIAL FREQUENCY CHANNELS [J].
GEORGESON, MA ;
SULLIVAN, GD .
JOURNAL OF PHYSIOLOGY-LONDON, 1975, 252 (03) :627-+