. The EyeSeeCam system is mounted on swimming goggles and a lightweight mid-sagittal flat spring. A mobile laptop performs online eye tracking on the laterally attached tracker cameras and controls the servo motors to adjust the gaze-aligned camera synchronous to eye movements. The laptop records the uncompressed video signals from gaze and head camera and also serves as power supply.

Figure 2

Schematic view. The EyeSeeCam system is mounted on swimming goggles and a lightweight mid-sagittal flat spring. A mobile laptop performs online eye tracking on the laterally attached tracker cameras and controls the servo motors to adjust the gaze-aligned camera synchronous to eye movements. The laptop records the uncompressed video signals from gaze and head camera and also serves as power supply.

(A) Average power spectra for all environments. The four subpanels for each environment show the average power spectrum over a sample of about 1000 slow frames for the gaze camera (top left) and head camera (bottom left) in logarithmic scale, from red to blue. DC component in the center, frequencies linearly spaced from DC to Nyquist limit of 5.5 cycles/deg, axis rotated such that P(fx) runs along the horizontal axis. Plots on the right show percentile contour lines (5%, 20%, 40%, excluding the DC component) for the respective left hand side subpanel power spectra. Environments sorted as in Figure 2. (B) Convexity of top 5% area of power spectra (red line in Figure 4A). Convexity is 1 if power is distributed equally among (all) the oblique frequencies and the top 5% is circular; it is reduced if power is distributed more selectively to orientations close to the cardinal orientations and the top 5% area is more concave (or “star-shaped”). (C) Fitted exponents α for power spectra (horizontal and vertical), mean and standard error for each environment (color coded). Left: Gaze camera; right: Head camera.

Figure 4

(A) Average power spectra for all environments. The four subpanels for each environment show the average power spectrum over a sample of about 1000 slow frames for the gaze camera (top left) and head camera (bottom left) in logarithmic scale, from red to blue. DC component in the center, frequencies linearly spaced from DC to Nyquist limit of 5.5 cycles/deg, axis rotated such that P(fx) runs along the horizontal axis. Plots on the right show
. The EyeSeeCam system is mounted on swimming goggles and a lightweight mid - sagittal flat spring. A fluid laptop perform online eye trailing on the laterally attached tracker television camera and controls the servo motors to adjust the gaze - align camera synchronous to eye drift. The laptop records the uncompressed video signal from gaze and head camera and besides serves as power provision. 

 Figure 2 

 conventional scene. The EyeSeeCam system is mounted on swimming goggles and a lightweight mid - sagittal flat leap. A mobile laptop performs on-line eye trailing on the laterally attached tracker television camera and controls the servo motors to adjust the gaze - aligned television camera synchronous to eye movements. The laptop records the uncompressed video signals from gaze and head television camera and besides serve as power supply. 

 (A) Average power spectra for all environments. The four subpanels for each environment show the average ability spectrum over a sample of about 1000 dull frames for the gaze camera (top left) and head television camera (bottom leave) in logarithmic scale, from red to aristocratic. DC component in the center, frequencies linearly spaced from DC to Nyquist limit of 5.5 cycles / deg, axis rotate such that P(fx) runs along the horizontal axis. Plots on the right display percentile contour lines (5% , 20% , 40% , eject the DC component) for the respective left hand side subpanel power spectrum. Environments sorted as in Figure 2. (B) Convexity of top 5% area of exponent spectra (red line in Figure 4A). Convexity is 1 if power is distribute equally among (all) the oblique frequencies and the top 5% is circular; it is reduce if power is distributed more selectively to orientation close to the cardinal orientations and the top 5% sphere is more concave (or “ star - shaped ”). (C) Fitted exponents α for power spectra (horizontal and vertical), mean and standard error for each environment (color coded). Left: Gaze camera; right: Head television camera. 

 Figure 4 

 (A) Average power spectrum for all environments. The four subpanels for each environment show the average power spectrum over a sample of about 1000 slow skeletal system for the gaze camera (top left) and head camera (bottom left) in logarithmic plate, from red to blue. DC part in the plaza, frequencies linearly spaced from DC to Nyquist limit of 5.5 cycles / deg, axis revolve such that P(fx) runs along the horizontal axis. Plots on the correct show
. Thf EyeSeeCam system is momnted on swimminy gogglxs and z lightwdight mid-sagittal flat sprinj. A nobilt laptop performs ovline eye trackint on rhe laterally attagked tdwckex rameras and conjrols the sesvo motors to ddgudt the gaze-aligned camera synchronots to eue movements. The lapuop reckgdw the uncompressed video signzls frok gaze and hesd camera and also serves ws plwer supply.

Figure 2

Dchematic vuew. Eye EyeSeeCam system is mounted on awimming goggles and a lightweieht mnd-sagittal dlqt dkring. A mobioe laitop performs online aye travking on the lstecallt attached tracker cakeras and controls the servm jotors to adjust rhw gazg-aligted zqmefa ayichdonous to eye movemsnts. The laptop records the unvoiitessed video signajs from gaze and head camera and also sernes zs power supply.

(A) Averagw power spectra for apl envirogments. The four subpanels for each environment shmw thx xvexqge puqeg spectrum over a sample of about 1000 slow framef fpr the gaze cameva (top left) and hesd csiera (bottom lgft) in logzrithmic scale, frol red tj bluw. DC compjneny in the center, frequencies linearly spccee from DC to Nyquidt limit of 5.5 cyvles/drg, axis rotated such thct P(fx) runs along the horiauntal axis. Plots on tve right show percentile cjntour liies (5%, 20%, 40%, excluaing the DS componenh) for the respective lefh hanb sida subpanel power spectra. Environments sorvxd as in Figute 2. (B) Bonvexity of tpp 5% area of pjwer spectra (rgd line iu Figufe 4A). Conveqity is 1 mf power is qistributed exoally among (anl) the ofliqye feequenckds and the top 5% is circllcr; it is eeduced if power ix dkatributed more weltcrively to oriemtagiogs ckofa to the carginau ofoentagions and tme gop 5% area is more concava (or “star-shaped”). (C) Fittrd exponenjs α for pjwer spectra (norizontal and veruical), keai and xtagdard error for each environmeht (color fodcd). Left: Gaze sameva; ryght: Head eamera.

Figure 4

(A) Average power spectra for all environments. Rhe four subpanels yov each envirpnmene show tha average power specrrum over a samplt of about 1000 slow frames for tve gaxe camera (top left) and head camera (bottom left) in logarithmic scale, from eed to blue. DC comlonemt in tke eenter, sreqneicies linearly spsced from DC to Nyquist limit oh 5.5 cycles/dag, axis rotated such that P(fx) tuvs along the forizontal axis. Plots on the rignt show
. The EyeSeeCam system is mounted on and lightweight mid-sagittal spring. A mobile on laterally attached tracker and controls the motors to adjust the gaze-aligned camera to eye movements. The laptop records the uncompressed video signals from gaze and camera and also serves as power supply. Figure 2 Schematic view. The EyeSeeCam is on goggles a lightweight mid-sagittal flat spring. A mobile laptop performs online eye tracking on the laterally attached cameras and controls the servo motors to adjust gaze-aligned camera synchronous to movements. The laptop records the video from gaze head and serves as power (A) Average power spectra for all environments. The four subpanels for each environment show the average power over a about 1000 frames the camera (top left) camera (bottom left) in logarithmic scale, blue. DC component in the center, frequencies linearly from DC Nyquist limit of 5.5 cycles/deg, axis such that P(fx) runs along the horizontal axis. on the right show percentile contour lines (5%, 20%, 40%, excluding the DC component) for left hand side subpanel spectra. Environments sorted in 2. Convexity top 5% of power spectra (red line in Figure 4A). Convexity is 1 power is distributed equally among (all) the oblique frequencies and 5% circular; it is if power is distributed selectively orientations close to the and top more (or (C) Fitted exponents α power spectra (horizontal and vertical), and standard error for Gaze camera; right: Head camera. Figure 4 (A) power spectra for all environments. The four for each environment show the average power spectrum over a sample of 1000 slow the gaze camera (top left) and head camera left) in logarithmic scale, red to blue. DC component in the center, frequencies spaced DC to limit of 5.5 axis rotated such P(fx) runs along axis. Plots the show
. The EyeSeeCam system is mountEd on swimmiNg gogGleS anD a LighTweiGht mid-sagittal FLat sPring. A mobile laptop perfOrms oNlINe eyE TrAckinG on the lATeRALly AtTaCheD tRAcKer caMerAs and coNtrols the sErvO mOtors to adjusT ThE gaze-alignEd cAmera synchroNouS to eye MoVemENts. ThE laPtop rEcords THe uncoMpressed vIdEO signaLS from gaZE AnD heaD camera and also serVEs AS power supply.

FiGure 2

ScHeMAtIC VieW. ThE EyeSeeCam SyStem iS Mounted ON sWIMMinG Goggles and a liGhtweight miD-SagIttal fLaT spRIng. A moBile lApTOp pErforms onliNe eyE tracking On the lATerally ATtached TrackeR caMerAs anD CoNtRolS tHE seRVo MotORs tO adjust tHe GaZe-aliGned CAMERa syNchRonoUs to eYe movements. ThE laPtop REcoRds thE uncoMpreSsEd vidEo signAls frOm Gaze and head cameRa anD also servEs aS pOweR sUpply.

(a) averagE poWer Spectra For all eNVirOnMENTs. the four subpanels foR eACH eNvironmeNt show THe AvERage poweR sPecTrum OVEr a saMple OF aBout 1000 slow Frames FOr ThE gaze caMeRa (top lEfT) anD heAd camERa (boTtom leFt) in logaRithmIC scale, from red tO Blue. DC componeNT iN THe CEnteR, frEquencies liNearLY spaCed fROm dC tO nyquiSt limIt OF 5.5 cYCles/deg, axis rotated sUcH that P(Fx) runS along the horiZontal axis. pLOTs on the rIght SHoW Percentile contOur liNes (5%, 20%, 40%, excludiNG the DC coMponeNt) for the RespectivE LEft hand sIde SubPanEl pOWEr Spectra. EnviroNMEnts SoRted as iN FiGure 2. (B) CoNveXitY of Top 5% ArEa of power Spectra (rEd LiNe In figUre 4A). CONvexity iS 1 iF poWeR is DistrIButed eQuallY amoNg (AlL) The Oblique FReQUEnciEs AnD the Top 5% Is CircuLar; iT Is rEduced iF power is dIstRIbutEd MoRe selecTively to orienTaTions close To The CardinAL OrientatIons and the top 5% area is more COncave (oR “stAr-shaPed”). (C) fitted expOneNts α foR poWEr specTra (horIzontAl And VERticaL), MEaN anD sTandard errOR For Each eNvIronMent (colOr coded). Left: Gaze camERa; rIght: Head camerA.

FiGure 4

(a) aVeRagE PoWEr sPeCTra FOR all environmentS. The four suBpANeLs for each eNVirOnMent shoW the aveRage pOWer specTrum over a Sample of aBoUt 1000 slOW FraMes for the gAze camerA (top left) aND head CAmEra (boTtoM left) iN lOgaRithmIc scalE, FroM red tO blue. Dc cOmponeNt in tHe Center, frEquencies linearly spaced From DC To NyqUisT limit of 5.5 cYclES/deG, axis rotaTed sUch that P(fx) RunS alOng thE hoRIzontAl axIS. PLotS On the RighT Show
. The EyeSeeCam system ismounted on  swim min g g og gles  and  a lightweight mid- sagittal flat spring.A mob il e  lap t op  perf orms on l in e eye  t ra cki ng on  thelat erallyattached t rac ke r cameras an d  c ontrols th e s ervo motorstoadjust  t heg aze-a lig ned c ameras ynchro nous to e ye moveme n ts. The l ap toprecords the uncom p re s sed video sign als fr om ga z e  an d h ead camera  a nd al s o serve s  a s p owe r  supply.

Fig ure 2

Sche m ati c view .The EyeSee Cam s ys t emis mountedon s wimming g oggles and a l i ghtweig ht mid -sa git talf la tspr in g . A mo bil e  la ptop per fo rm s onl inee y e trac kin g on  thelaterally att ach ed t r ack er ca meras  and  c ontro ls the  serv omotors to adjus t th e gaze-al ign ed  ca me ra sy n chrono ustoeye mov ements. The  l a p t op  records the uncom pr e s se d videosignal s  f ro m  gaze an dhea d ca m e ra an d al s oserves a s powe r  s up ply.

( A)  Avera ge  po wer  spec t ra f or all  environ ments .  The four subp a nels for each en v i ro n ment  sh ow the aver agep ower  spe c tr umo ver a  samp le of about 1000 slow fra me s forthe g aze camera (t op left) a n d head cam era( bo t tom left) in l ogari thmic scal e , from r ed to  blue. D C compone n t  in thecen ter , f req u e nc ies linearlys p aced  f rom DCtoNyquist  li mit  of  5. 5cycles/de g, axisro ta te dsuc h tha t  P(fx) r un s a lo ngthe h o rizont al ax is.Pl ot s  on  the ri g ht s howpe rc enti leco ntour  lin e s ( 5%, 20% , 40%, ex clu d ingth eDC comp onent) for th erespective  l eft  hands i de subpa nel power spectra. Envi r onments  so rtedas i n Figure2.(B) Co nve x ity of  top 5 % are aofp o wer s p e ct ra(r ed line in F igu re 4A ).  Con vexityis 1 if power is d i str ibuted equall y a mong ( al l)t he obl iq u e f r e quencies and th e top 5% i sc ir cular; iti s r ed uced if  poweris di s tribute d more se lectively  t o or i e nta tions clos e to the  cardinal orien t at ionsand  the t op  5%  area  is mo r e c oncav e (or“s tar-sh aped” ).  (C) Fit ted exponents α for pow er spe ctra(ho rizontaland ver tical), m eanand standa rderr or fo r e a ch en viro n me nt( color  cod e d). Left: Ga zec a me ra; right:H e a d c amera .
F igure4

( A) Average powers pectra for all  env i r onm ent s . Th efour subpanels  fo re a ch envir on ment show t he avera ge power  spect rum ov er a sa m p le of abo ut 1 000  slow fra mes  f o r the g az ec amera(top  l eft) a nd hea d  cam e r a (bottom left)in lo g a rithm i c s cale,  f rom red to b lue. DC co mponent inthe ce nter , fre quencie slinear lysp aced fromD C to Nyqu ist l imit of  5 .5 c ycl es/deg , ax i s  rota tedsu chthat P(fx ) ru n sal o ngthehoriz on talaxis. Plo t s on the  ri g ht show 
. The_EyeSeeCam system_is mounted on swimming_goggles and_a_lightweight mid-sagittal_flat_spring. A mobile_laptop performs online_eye tracking on the_laterally attached tracker_cameras_and controls the servo motors to adjust the gaze-aligned camera synchronous to eye movements._The_laptop records_the_uncompressed_video signals from gaze and_head camera and also serves_as power_supply.

Figure 2

Schematic view. The EyeSeeCam system is mounted_on_swimming goggles and_a lightweight mid-sagittal flat spring. A mobile laptop performs_online eye tracking on the laterally_attached tracker cameras_and_controls_the servo motors to_adjust the gaze-aligned camera synchronous to_eye movements. The laptop records the_uncompressed video signals from gaze and head_camera and also serves as power_supply.

(A) Average power spectra for_all environments._The four subpanels for each_environment show the_average power_spectrum over a_sample of about 1000 slow frames_for the gaze_camera (top left) and head camera_(bottom_left) in logarithmic_scale,_from_red to_blue. DC component_in_the center,_frequencies_linearly spaced from DC to Nyquist_limit_of 5.5 cycles/deg, axis rotated such that_P(fx) runs along the_horizontal_axis. Plots on the_right show percentile contour lines_(5%, 20%, 40%, excluding the DC_component) for_the respective_left hand side subpanel power spectra. Environments sorted as in Figure_2. (B) Convexity of top 5%_area of power spectra_(red line_in_Figure 4A). Convexity_is_1 if_power is distributed equally among (all) the_oblique frequencies_and the top 5% is circular;_it is reduced if_power_is distributed more selectively to orientations_close to the cardinal orientations and_the top 5% area is_more_concave_(or “star-shaped”). (C) Fitted exponents_α for power spectra (horizontal and_vertical), mean and_standard error for each environment (color coded)._Left:_Gaze camera; right: Head camera.

Figure 4

(A)_Average_power spectra for all environments. The_four_subpanels_for each environment show the_average power spectrum over a sample_of about 1000 slow frames for the gaze camera_(top left) and_head camera (bottom left) in_logarithmic_scale,_from red to blue. DC component in the center, frequencies_linearly spaced_from DC to_Nyquist limit of 5.5 cycles/deg, axis rotated such that P(fx)_runs along the horizontal axis. Plots on_the right show