Visual Cognition research group Contact Information

Principal Investigator, University Researcher
Jukka Häkkinen
Institute of Behavioural Sciences
PO Box 9 (Siltavuorenpenger 1 A)
FI-00014 University of Helsinki
+358 - 9 - 1911
e-mail:
Jukka.Hakkinen@helsinki.fi

Publications

2014

Nuutinen, M., Virtanen, T., Leisti, T., Mustonen, T., Radun, J. & Häkkinen, J. (2014) A new method for evaluating the subjective image quality of photographs: Dynamic Reference. Multimedia Tools and Ap-plications, December 2014. DOI: 10.1007/s11042-014-2410-7.

Hakala, J., Oittinen, P. & Häkkinen, J. (2014) Depth artifacts caused by spatial interlacing in stereoscopic 3D displays. Transactions on Applied Perception, In Press.

Nuutinen, M., Virtanen, T., Rummukainen, O. & Häkkinen, J. (2014) VQone MATLAB toolbox: A graphical experiment builder for image and video quality evaluations. Behavior Research Methods, In Press.

Nuutinen, M., Virtanen, T. & Oittinen, P. (2014) Image feature subsets for predicting the quality of consumer camera images and identifying quality dimensions. Journal of Electronic Imaging, 23(6), 061111. doi:10.1117/1.JEI.23.6.061111

Virtanen, T., Nuutinen, M., Vaahteranoksa, M., Oittinen, P. & Häkkinen, J. (2014) CID2013: a database for evaluating no-reference image quality assessment algorithms. IEEE Transactions on Image Processing. In Press.

Radun, J., Leisti, T., Virtanen, T., Nyman, G., & Häkkinen, J. (2014). Why is quality estimation judgment fast? Comparison of gaze control strategies in quality and difference estimation tasks. Journal of Electronic Imaging, 23(6), 061103. doi:10.1117/1.JEI.23.6.061103

Leisti T., Radun J., Virtanen, T., Nyman G., Häkkinen J. (2014) Explaining can enhance visual decision making. Acta Psychologica 145, Pages 65–74.

Hakala, J., Westman, S., Salmimaa, M., Pölönen, M., Järvenpää, T. & Häkkinen, J. (2014) Why 3D cameras are not popular: A qualitative user study on stereoscopic photography acceptance. 3D Research, 3D Research 5:4.

Kawai, T., Atusta, D., Tomiyama, Y., Kim, S., Morikawa, H., Mitsuya, R. & Häkkinen, J. (2014) Disparity modifications and the emotional effects of stereoscopic images. Proceedings of IS&T/SPIE's International Symposium on Electronic Imaging 2014, Stereoscopic Displays and Applications XXV, 901115.

Salmimaa, M., Hakala, J., Pölönen, M., Järvenpää, T., Bilcu, R. & Häkkinen, J. (2014) Luminance asymmetry in stereoscopic content: Binocular rivalry or luster. Display Week 2014 International Symposium, Seminar and Exhibition, June 1-6, 2014, California, San Diego Convention Center.

Sassi, A., Pöyhönen, P., Jakonen, S., Suomi, S., Capin, T. & Häkkinen, J. (2014) Enhanced user performance in image gallery application with mobile autostereoscopic touch display. Displays, Displays 35, 152-158.

Rummukainen, O., Radun, J., Virtanen, T., & Pulkki, V. (2014). Categorization of natural dynamic audiovisual scenes. PloS one, 9(5), e95848. doi:10.1371/journal.pone.0095848

 

2013

Kawai, T., Hirahara, M., Tomiyama, Y., Atsuta, D. & Häkkinen, J. (2013) Disparity analysis of 3D movies and emotional representations. Proceedings of SPIE Vol. 8648, Stereoscopic Displays and Applications XXIV, 86480Z (March 12, 2013); doi:10.1117/12.2008582.

Kim, S., Morikawa, H., Mitsuya, R., Kawai, T., Häkkinen, J. (2013)  Binocular disparity and emotional evaluation of horror in S3D content The Japanese Journal of Ergonomics 49:  S424-S427.

Kytö, M., Mäkinen, A., Häkkinen, J., Oittinen, P. (2013) Using auxiliary augmentations for reducing ordinal and relative depth judgment errors in non-photorealistic augmented reality. ACM Transactions on Applied Perception 10(1) Article 6.

Muukkonen, H., Kosonen, K., Marttiin, P., Vesikivi, P., Kaistinen, J., & Nyman, G. (2013). Pedagogical design for knowledge creating inquiry in customer projects. Knowledge Management & E-Learning, 5(3), 278–297.

Nuutinen, M., Virtanen, T., Valkonen, V., & Oittinen, P. (2013) Automatic exposure and white balance control in video cameras: Time course characterization and preference. Proceedings of the 8th International Symposium on Image and Signal Processing and Analysis 2013, p. 25–29.

Pei, L. , Guinness, R. , Chen, R. , Liu, J. , Kuusniemi, H. , Chen, Y. , Chen, L. & Kaistinen, J. (2013) Human Behavior Cognition Using Smartphone Sensors. Sensors 13(2), 1402-1424.

Takala, T., Hämäläinen, P., Matveinen, M., Simonen, T. & Takatalo, J. (2013) Enhancing Spatial Perception and User Experience in Video Games with Volumetric Shadows. Proceedings of OzCHI 2013. In Press.

Takatalo, J., Miller, D. & Häkkinen, J. (2013) Experience, Engagement and Shikake. Proceedings of AAAI 2013 Spring Symposium Series: Shikakeology, March 25.–27. 2013, Stanford, CA, USA.

2012

Kytö, M., Hakala, J., Oittinen, P. & Häkkinen, J. (2012) Defining Camera Separation for Stereoscopic Mobile Phones. Journal of Electronic Imaging, 21(1) 011011.

Nuutinen, M., Orenius, O., Säämänen, T., Oittinen, P. (2012) A Framework for Measuring Sharpness in Natural Images Captured by Digital Cameras Based on Reference Image and Local Areas. EURASIP Journal on Image and Video Processing, 2012(8).

Nuutinen, M., Virtanen, T., Oittinen, P. (2012) Features for predicting quality of images captured by digital cameras. Proc of IEEE International Symposium on Multimedia. p. 165-168.

Pölönen, M., Hakala, J., Bilcu, R., Järvenpää, T., Häkkinen, J. & Salmimaa, M. (2012) Color Asymmetry in 3D Imaging: Influence on Viewing Experience. Journal of 3D Research 3(3) Article 5.

Pölönen, M., Järvenpää, T. & Häkkinen, J. (2012) Reading e-books on a near-to-eye display: comparison between a small-sized multimedia display and a hard copy. Displays 33(3) 157-167.

Pölönen, M., Salmimaa, M., Takatalo, J. & Häkkinen, J. (2012) Subjective Experiences of Watching Stereoscopic Avatar and U2 3D in a Cinema. Journal of Electronic Imaging 21(1) 011006-1 - 011006-8.

Radun, J., Leisti, T., Virtanen, T., & Nyman, G. (2012). How do we watch images?: a case of change detection and quality estimation. in: Image Quality and System Performance IX (Proceedings Volume): proceedings of the IS&T/SPIE's International Symposium on Electronic Imagining 2012, 23-26 January 2012, Burlingame, California USA/ Eds. Frans Gaykema and Peter Burns - RECEIVED THE BEST STUDENT PAPER AWARD OF THE CONFERENCE

2011

Eerola, T., Lensu, L., Kamarainen, J., Leisti, T., Ritala, R., Nyman, G. & Kalviainen, H. (2011) Bayesian network model of overall print quality: Construction and structural optimisation. Pattern Recognition Letters 32, 11, p. 1558-1566.

Kawai, T., Häkkinen, J., Oshima, K., Saito, H., Yamazoe, T., Morikawa, H., Nyman, G. (2011) Psychophysiological effects of head-mounted displays in ubiquitous use. Multimedia on Mobile Devices 2011 and Multimedia Content Access: Algorithms and Systems V, Ed. D. Akopian, SPIE Vol 7881, 1-12.

Nuutinen, M., Orenius, O., Säämänen, T., Oittinen, P. (2011) Potential of face area data for predicting sharpness of natural images. Proc. of SPIE/IS&T Electronic Imaging 2011, Image Quality and System Performance VIII. San Francisco, California, USA, 23.-27.1.2011, [7876-36].

Nuutinen, M., Orenius, O., Säämänen, T., Oittinen, P. (2011) Reference image method for measuring quality of photographs produced by digital cameras. Proc. of SPIE/IS&T Electronic Imaging 2011, Image Quality and System Performance VIII. San Francisco, California, USA, 23.-27.1.2011. [7876-22].

Nyman, G. (2011) Suomen Akatemian rooli olisi syytä uudistaa. Helsingin Sanomat 7.4.2011.

Takatalo, J., Häkkinen, J., Kaistinen, J. & Nyman, G. (2011) User Experience in Digital Games: Differences Between Laboratory and Home. Simulation & Gaming 42(5) 657-674.

Takatalo, J., Häkkinen, J., Kaistinen, J. & Nyman, G. (2011) User experience in stereoscopic 3D games. Media Psychology 14(4) 387-414.

Pölönen, M., Salmimaa, M. & Häkkinen, J. (2011) Effect of ambient illumination level to perceived autostereoscopic display quality and depth perception. Displays 32(3) 135-141.

Takatalo, J. (2011) Psychologically-based and content-oriented experience in entertainment virtual environments Helsinki. Studies in Psychology / Helsingin yliopiston psykologian laitoksen tutkimuksia: 77, 98 p. Doctoral Thesis.

2010

Radun, J., Leisti, T., Virtanen, T., Häkkinen, J., Vuori, T. & Nyman, G. (2010) Evaluating the Multivariate Visual Quality Performance of Image-Processing Components. ACM transactions on applied perception 7, 3, p. 16.

Takatalo, J., Häkkinen, J., Kaistinen, J. & Nyman, G. (2010) Evaluating user experience in digital games: a psychological approach. Journal of digital games research 4, 1, p. 21-35.

Nyman, G., Häkkinen, J., Koivisto, E-M., Leisti, T., Lindroos, P., Orenius, O., Virtanen, T., Vuori, T. (2010) Evaluation of the visual performance of image processing pipes: information value of subjective image attributes. IS&T/SPIE's International Symposium on Electronic Imaging: Science and Technology, Image Quality and System Performance XXI, 18-22 January 2010, San Jose California, USA.

Eerola, T., Lensu, L., Kälviäinen, H., Kämäräinen, J., Leisti, T., Nyman, G., Halonen, R. & Oittinen, P. (2010) Printed Image Quality: Measurement Framework and Statistical Evaluation. Journal of Imaging Science and Technology 54, 1, p. 1-13.

Halonen, R., Nuutinen, M., Oittinen, P., Leisti, T., Nyman, G., Mettänen, M., Ritala, R., Eerola, T., Lensu, L., Kämäräinen, J. & Kälviäinen, H. (2010) Fusion of Digital and Visual Print Quality: Final Report of DigiQ Project. Helsinki, 108 p. Graphic arts in Finland: 3.

Nyman, G., Kaistinen, J., Takatalo, J. & Häkkinen, J. (2010) Innovation Journalists, Null-Hypothesis, and the Forgotten H0 Heroes. Innovation journalism 7, 8, p. 1-13.

Muukkonen, H., Lakkala, M., Kaistinen, J. & Nyman, G. (2010) Knowledge Creating Inquiry In a Distributed Project-Management Course. Research and Practice in Technology Enhanced Learning 5, 2, p. 73-96.

Takatalo, J., Häkkinen, J., Lehtonen, M., Kaistinen, J. & Nyman, G. (2010) Presence, involvement, and flow in digital games. In Bernhaupt, R. (Ed.) Evaluating User Experience in Games: Concepts and Methods. London: Springer, p. 23-46.

Häkkinen, J., Aaltonen, V., Schrader, M., Nyman, G., Lehtonen, M. & Takatalo, J. (2010) Qualitative analysis of mediated communication experience. IEEE QoMEX 2010, p. 147-151.

Kishi, S., Kim, S., Shibata, T., Kawai, T., Häkkinen, J., Takatalo, J. & Nyman, G. (2010) Scalable 3D image conversion of stereoscopic images for safety and comfort (Japanese). Journal of The Institute of Image Information and Television Engineers 64, 12, p. 1912-1920.

Säämänen, T., Virtanen, T. & Nyman, G. (2010) Videospace: Classification of video through shooting context information. Proc. SPIE 7529, 752906 (2010); doi:10.1117/12.839414.

Häkkinen, J., Kawai, T., Takatalo, J., Mitsuya, R. & Nyman, G. (2010) What do people look at when they watch stereoscopic movies? Electronic Imaging: Stereoscopic Displays & Applications XXI Conference. Proceedings of SPIE, Vol. 7524, 10 p.

Nuutinen, M., Orenius, O., Säämänen, T., Oittinen, P. (2010) A Reduced-reference Method for Characterizing Color Noise in Natural Images Captured by Digital Cameras. Proc. Of. IS&T/SID 18th Color and Imaging Conference, San Antonio, Texas, USA 8.-12.11.2010, pp. 80-85.

Nuutinen, M., Halonen, R., Leisti, T. & Oittinen, P. (2010) Reduced-reference quality metrics for measuring the image quality of digitally printed natural images. Proc. SPIE 7529, 75290I (2010); doi:10.1117/12.838883.

Pölönen, M., Järvenpää, T. & Häkkinen, J. (2010) Comparison of near-to-eye displays: subjective experience and comfort. Journal of Display Technology, Vol. 6, pp. 27-35

2009

Aaltonen, VK., Takatalo, J., Häkkinen, J., Lehtonen, M., Nyman, G., & Schrader, M. (2009) Measuring mediated communication experience. First International Workshop on Quality of Multimedia Experience (QoMEX 2009), 29.-31.7.2009, San Diego, California, U.S.A.

Häkkinen, J., Kilpeläinen, M., Salmimaa, M., Takatalo, J. & Nyman, G. (2009) Image quality with stereoscopic contents: Determining the limits to avoid double images. Journal of the Society for Information Display 17 (5), 433-441.

Leisti, T., Radun, J., & Nyman, G. (2009). Subjective quality of print. In Oittinen, P., & Saarelma, H. (Eds.), Papermaking science and technology. Book 13: Print media: Principles, processes and quality (2nd ed., totally updated version), p. 336-354. Helsinki: Papers Engineers' Association/Paperi ja Puu oy.

Leisti, T., Radun, J., Virtanen, T., Halonen, R., & Nyman, G. (2009) Subjective experience of image quality: attributes, definitions, and decision making of subjective image quality. In Farnand, S. P., & Gaykema, F. (Eds.): Image Quality and System Performance VI (Proceedings Volume): Proceedings of the IS&T/SPIE's International Symposium on Electronic Imagining 2009, 19 January 2009, San Jose, California USA: Volume 7242.

Pölönen, M. & Häkkinen, J. (2009) Near-to-Eye Display—An Accessory for Handheld Multimedia Devices: Subjective Studies. Journal of Display Technology, Vol. 5, No. 9, September 2009. DOI 10.1109/JDT.2009.2025056.

Pölönen, M, Järvenpää, T. & Häkkinen, J. (2009) Comparison of Near-to-Eye Displays: Subjective Experience and Comfort. Journal of Display Technology. DOI 10.1109/JDT.2009.2029123.

Pölönen, M., Salmimaa, M., Aaltonen, V.-K., Häkkinen, J. & Takatalo, J. (2009) Subjective measures of presence and discomfort in viewers of color-separation-based stereoscopic cinema. Journal of the Society for Information Display 17(5), 459-466.

Pölönen, M., Järvenpää, T. & Häkkinen, J. (2010) Comparison of near-to-eye displays: subjective experience and comfort. Journal of Display Technology, Vol. 6, pp. 27-35

Pölönen, M. & Häkkinen, J. (2009) Near-to-eye display – an accessory for handheld multimedia devices: subjective studies. Journal of Display Technology 5(9) 358-367

Salmimaa, M., Häkkinen, J., Liinasuo, M. & Järvenpää, T. (2009) Effect of number of views to the viewing experience with autostereoscopic 3D displays. Journal of the Society for Information Display 17(5) 449-458

Shibata, T., Kurihara, S., Kawai, T, Takahashi, T., Shimizu, T., Kawada, R., Ito, A., Häkkinen, J., Takatalo, J. & Nyman, G. (2009) Evaluation of stereoscopic image quality for mobile devices using interpretation based quality methodology. IS&T/SPIE's International Symposium on Electronic Imaging: Science and Technology, Stereoscopic Displays and Applications XX, 18-22 January 2009, San Jose California, USA.

Särkelä, H., Takatalo, J., May, P., Laakso, M. & Nyman, G. (2009) Movement patterns and the experiential components of virtual environments. International Journal of Human-Computer Studies 67 (9), 787-799.

Takatalo, J., Häkkinen, J., Kaistinen, J., & Nyman, G. (2009) Experiencing multimodal environments. Experiencing light 2009 conference, 26.-28.10.2009, Eindhoven, The Netherlands.

2008

Häkkinen, J., Kawai, T., Takatalo, J., Leisti, T., Radun, J., Hirsaho, A. & Nyman, G. (2008) Measuring stereoscopic image quality experience with interpretation based quality methodology. Proceedings of the IS&T/SPIE's International Symposium on Electronic Imaging 2008: Imaging Quality and System Performance V, 27-31 January 2008, San Jose Convention Center, San Jose, California USA.

Häkkinen, J., Pölönen, M., Salmimaa, M. & Hautanen, J. (2008) Reading experience with curved hand-held displays. Journal of the SID Society for Information Display, 16/11.

Jumisko-Pyykkö, S. & Häkkinen, J. (2008) The effect of age and technology experience on subjective mobile video quality. Proceedings of the IS&T/SPIE's International Symposium on Electronic Imaging 2008: Multimedia on Mobile Devices III, 27-31 January 2008, San Jose Convention Center, San Jose, California USA.

Leisti, T., Halonen, R., Kokkonen, A., Weckman, H., Mettänen, M., Lensu, L., Ritala, R., Oittinen, P. & Nyman, G. (2008) Process perspective on image quality evaluation. In Image Quality and System Performance V: Image Quality Evaluation Concepts, pp. 68080P Proceedings of SPIE, vol. 6808.

Miettinen, I., Näsänen, R. & Häkkinen, J. (2008) Effects of saccade length and target luminance on the refresh frequency threshold for the visibility of colour break-up. IEEE Journal of Display Technology 4(1) 81-85.

Mizobuchi, S., Terasaki, S., Bergquist, J., Häkkinen, J., Heinonen, E. & Chignell, M. (2008) The effect of stereoscopic viewing in a word-search task with a layered background. Journal of the Society for Information Display 16(11) 1105-1113.

Pölönen, M., Aaltonen, V., Nyman, G. & Häkkinen, J. (2008) Influence of the monocular near-to-eye display position on the visual system during dual-task performance. Journal of the Society for Information Display 16(11) 1083-1087.

Virtanen, T., Radun, J., Lindroos, P., Suomi, S., Säämänen, T., Vuori, T., Vaahteranoksa, M., & Nyman, G. (2008) Forming valid scales for subjective video quality measurement based on a hybrid qualitative/quantitative methodology. In Farnand, S. P. & Gaykema, F. (Eds.): Image Quality and System Performance V (Proceedings Volume): Proceedings of the IS&T/SPIE's International Symposium on Electronic Imagining 2008, 27-31 January 2008, San Jose, California USA: Volume 6808.

2007

Havukumpu, J., Häkkinen, J., Grönroos, E., Vähäkangas, P & Nyman, G. (2007) Comparing Two Head-Mounted Displays in Ultrasound Scanning. In: Jacko, J. (Ed.) Human-Computer Interaction, Part II, HCII 2007, LNCS 4551, p. 597–604. Springer-Verlag Berlin Heidelberg.

Niinikuru, R., Kojo, I., Häkkinen, J. (2007) Miten katseen kohdistamisen aikaiset pienet silmänliikkeet vaikuttavat havaitsemiseen? Psykologia 42, 4-13. (“How do the small eye movements during fixation affect perception”).

Radun J., Virtanen T., Olives J-L., Vaahteranoksa M., Vuori T., Nyman G. (2007) Audiovisual Quality Estimation of Mobile Phone Video Cameras with Intrepretation-Based Quality Approach. In Proceedings of Electronic Imaging Science and Technology 6494, San Jose, USA. Jan. 2007 649403-1 – 649403-11.

Takatalo, J., Häkkinen, J., Kaistinen, J. & Nyman, G. (2007) Measuring user experience in digital gaming: Theoretical and methodological issues. Proceedings of the IS&T/SPIE Symposium on Electronic Imaging, 28.1. - 1.2. 2007, San Jose, California USA. 1-13.

2006

Havukumpu, J., Vähäkangas, P., Grönroos, E. & Häkkinen, J. (2006) Midwives experiences of us-ing HMD in ultrasound scan. Proceedings of the 4th Nordic conference on Human-computer interaction: changing roles. ACM International Conference Proceeding Series; Vol. 189, 369-372.

Häkkinen, J., Liinasuo, M., Takatalo, J. & Nyman, G. (2006) Visual comfort with stereoscopic mobile gaming. Proceedings of the IS&T/SPIE's International Symposium on Electronic Imaging 2006: Stereoscopic Displays and Applications XVII, vol. 6055. Andrew J. Woods, Neil A. Dodgson, John O. Merritt, Mark T. Bolas, Ian E. McDowall, Editors, 60550A. DOI 10.1117/12.641210.

Häkkinen, J., Takatalo, J., Pölönen, M. & Nyman, G. (2006) Simulator sickness in virtual display gaming: A comparison of stereoscopic and non-stereoscopic situations. Proceedings of the 8th conference on Human-computer interaction with mobile devices and services MobileHCI '06, 12-15th September, Espoo, Finland. ACM International Conference Proceeding Series, Vol. 159, pp. 227-229.

Jumisko-Pyykkö, S. & Häkkinen, J. (2006) “I would like to see the face and at least hear the voice”: Effects of screen size and audio-video bitrate ratio on perception of quality in mobile television. 4th European Interactive TV Conference, 25-26 May 2006, Athens, Greece.

Kojo, I., Häkkinen, J. & Simola, J. (2006) Captured waterfall: Depth capture in a natural setting. Perception 35 (5), 717-718.

Lehtonen J., Andriyashin, A., Parkkinen, J., Leisti, T., Nyman, G. (2006) Functions of image. Proceedings of the SPIE: Intelligent robots and computer vision XXIV: Algorithms, techniques, and active vision, Vol 6384, 3-4 October 2006, Boston, Massachusetts, USA.

Nyman, G., Radun, J., Leisti, T., Oja, J., Ojanen, H., Olives, J.-L., Vuori, T. & Häkkinen, J. (2006) What do users really perceive – probing the subjective image quality experience. Proceedings of the IS&T/SPIE's International Symposium on Electronic Imaging 2006: Imaging Quality and System Performance III, Vol. 6059, 15-19 January 2006, San Jose Convention Center, San Jose, California USA, pp. 1-7.

Radun J., Virtanen T., Nyman G., Olives J-L. (2006) Explaining multivariate image quality – Interpretation-Based Quality Approach. In Proceedings of ICIS ’06, Rochester, NY, USA, May 2006, International Congress of Imaging Science, 119-121.

Takatalo, J., Häkkinen, J., Komulainen, J., Särkelä, H. & Nyman, G. (2006) The impact of the display type and content to a game adaptation. Proceedings of the Eight International Conference on Human-Computer Interaction With Mobile Devices and Services, September 12-15, Otaniemi, Finland, 17-20.

Takatalo, J., Häkkinen J., Komulainen, J., Särkelä, H., & Nyman, G. (2006) Involvement and presence in digital gaming. Proceedings of the Fourth Nordic Conference on Human-Computer Interaction, October 14-18, Oslo, Norway, 393-396.

Takatalo, J., Häkkinen, J., Kaistinen, J., Komulainen, J., Särkelä, J. & Nyman, G. (2006) Adaptation into a game: Involvement and presence in four different PC-games. Proceedings of the FuturePlay 2006: The International Academic Conference on the Future of Game Design and Technology, October 10-12, London, Ontario, Canada.

2005

Havukumpu, J., Nyman, G., Takatalo, J. & Häkkinen, J. (2005) Attention and simulator sickness with a see-through head-mounted display. Proceedings of the 11th International Conference on Human-Computer Interaction, 22-27 July, Las Vegas, Nevada, USA. NV: Mira Digital.

Häkkinen, J., Takatalo, J., Komulainen, J., Särkelä, H., Havukumpu, J. & Nyman, G. (2005) Simulator sickness symptoms in virtual display gaming. Proceedings of the 12th International Display Workshops (IDW '05), December 6-9, 2005, Sunport Takamatsu, Takamatsu, Japan, pp. 1825-1828.

Jumisko-Pyykkö, S. & Häkkinen, J. (2005) Evaluation of subjective video quality on mobile devices. Proceedings of the 13th ACM International Conference on Multimedia 6-12 November, 2005, Singapore, pp. 535-538.

Nyman G., Radun J., Leisti T. & Vuori T. (2005) From image fidelity to subjective quality: a hybrid qualitative/quantitative methodology for measuring subjective image quality for different image contents. In Proceedings of the 12th International Display Workshops (IDW '05), December 6-9, 2005, Sunport Takamatsu, Takamatsu, Japan, pp. 1817–1820.

Pölönen, M., Häkkinen, J. & Laarni, J. (2005) Reading short lines. Proceedings of the 11th International Conference on Human-Computer Interaction, 22-27 July, Las Vegas, Nevada, USA. NV: Mira Digital.

2004

Häkkinen, J. (2004) A virtual display for mobile use. Society for Information Display 2004 International Symposium, Seminar and Exhibition. May 23-28, 2004 Washington State Convention Center, Seattle, Washington USA. Society for Information Display 2004 International Symposium Digest of Technical Papers, Vol. XXXV, Book II, pp. 1586-1589.

Häkkinen, J., Takatalo, J., Havukumpu, J., Komulainen, J., Särkelä, H. & Nyman, G. (2004) Simulator sickness symptoms caused by a visual search task in a monocular virtual display. Proceedings of the 11th International Display Workshops (IDW '04) December 8-10, 2004, Niigata Convention Center, Toki Messe, Niigata, Japan, pp. 1511-1513.

Liinasuo, M., Kojo, I., Häkkinen, J. & Rovamo, J. (2004) Visual completion of three-dimensional, chromatic, moving stimuli in humans. Neuroscience Letters 354(1-2), 18-21.

Mustonen, T., Olkkonen, M., Häkkinen, J. (2004) Examining mobile phone text legibility while walking. ACM Conference on Human Factors in Computing Systems (CHI 2004), April 24-29, Vienna, Austria. Extended abstracts, pp. 1243–1246.

Pölönen, M., Häkkinen, J. & Laarni, J. (2004) Does eye tracking provide a window to the soul of mobile phone users? Proceedings of the 11th International Display Workshops (IDW '04) December 8-10, 2004, Niigata Convention Center, Toki Messe, Niigata, Japan, pp. 1519-1522.

Särkelä, H., Takatalo, J., Komulainen, J., Nyman, G. & Häkkinen, J. (2004) Attitudes to a new technology and experiential dimensions of two different digital games. Proceedings of the Third Nordic Conference on Human-Computer Interaction, October 23-27, Tampere, Finland, 349-352.

Takatalo, J., Häkkinen, J., Särkelä, H, Komulainen, J. & Nyman, G. (2004) The experiential dimensions of two different digital games. Proceedings of the PRESENCE 2004-7th Annual International Workshop on Presence October 12-15, Valencia, Spain, 274-278.

Takatalo, J., Häkkinen, J., Särkelä, H, Komulainen, J. & Nyman, G. (2004) A Psychological profile of game play. Advance –Nokia research magazine. No. 3.

Vuori, T., Olkkonen, M., Pölönen, M., Siren, A. & Häkkinen, J. (2004) Can eye movements be quantitatively applied in image quality studies? NordiCHI2004, Proceedings of the Third Nordic Conference on Human-Computer Interaction, October 23-27, Tampere, Finland, pp. 335-338.

1995-2003

Häkkinen, J. (2002) Using interocular apparent movement to measure head-mounted display misalignment. The 22nd International Display Research Conference, October 2-4, Nice, France, pp. 811-814.

Häkkinen, J., Vuori, T. & Puhakka, M. (2002) Simulator sickness and postural sway after HMD use. IEEE International Conference on Systems, Man and Cybernetics. Yasmine Hammamet, Tunis, October 6 – 9, 2002, 147-152.

Mustonen, T., Törn, L. & Häkkinen, J. (2002) The effect of character size and contrast on performance in pseudo-text and letter search tasks. Society for Information Display, 2002 International Symposium Digest of Technical Papers, Volume XXXIII, Number 1, 240-243.

Häkkinen, J. & Nyman, G. (2001) Phantom surface captures stereopsis. Vision Research, 41, 187-199.

Liinasuo, M., Kojo, I., Häkkinen, J. & Rovamo, J. (2000) Neon colour spreading in three-dimensional illusory objects in humans. Neuroscience Letters 281 (2-3), 119-122.

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Psychology in University of Helsinki

University of Helsinki