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COLOR MEMORY MATCH UNDER DISPARATE VIEWING CONDITION

This study conducted at Gjøvik University College and University of Pardubice delves into the complex realm of color memory and appearance, aiming to understand how individuals perceive and remember colors under disparate viewing conditions. By utilizing the CIECAM02 model and conducting experiments on color memory matching, the research examines the differences in color perception based on surrounding parameters. The results reveal intriguing insights into color memory shift and its correlation with background and surrounding colors, shedding light on the challenges in predicting color attributes accurately, particularly with varying backgrounds. The study also suggests potential areas for further exploration, including refining color mixing techniques and investigating color memory of specific color pairs. This research contributes to the broader understanding of human perception and memory in relation to color, offering valuable insights for future studies in this field.

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COLOR MEMORY MATCH UNDER DISPARATE VIEWING CONDITION

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  1. COLOR MEMORY MATCH UNDER DISPARATE VIEWING CONDITION Ondrej Panák SUPERVISING BY: Jon Y. Hardeberg Peter Nussbaum Marie Kaplanová The Norwegian Color Research Laboratory Faculty of Computer Science and Media Technology Gjøvik University College Gjøvik, Norway http://www.colorlab.no Department of Graphic Arts and Photophysics Faculty of Chemical Technology University of Pardubice Pardubice, Czech republic http://www.upce.cz Master Thesis Presentation 8.7.2007, Gjøvik

  2. CONTENT ♦ Introduction - Color memory - Color appearance ♦ Aim ♦ Experiment ♦ Results ♦ Conclusion

  3. COLOR MEMORY ♦ Color memory shift ♦ Cognitive colors ♦ Color memory experiments - Abstract cue - Memory cue ♦ Methods - Selecting - Mixing up - Deciding

  4. COLOR APPEARANCE ♦ Color appearance phenomena ♦ Color appearance models – CIECAM02 ♦ Corresponding color data sets

  5. AIM ♦Color memory matchunder simply specified condition (varied in surround and background parameters only) ♦How big are the differences between mixing memory color in different condition, and can be used CIECAM02 for evaluation modeled experiment? ♦Is memory shift really not related to the conditions of memorizing (the same conditions of mixing)?

  6. VARIABLES ♦ Colors ♦ Given cue ♦ Time to show ♦ Delay time to match ♦ Shape ♦ Angular subtense ♦ Number of observers ♦ Adaptation time ♦ Background ♦ Surround ♦ Illuminant

  7. EXPERIMENT EXPERIMENT 1 EXPERIMENT 2

  8. EXPERIMENT 1

  9. EXPERIMENT 1

  10. EXPERIMENT 2

  11. EXPERIMENT 2

  12. RESULTS E-1 Dim mixing in CIELAB ab plane aL plane

  13. RESULTS E-1 Mean coordinatesof different mixing in CIELAB Nontransformed Transformed

  14. LAB CAM Lighntess Chro./colorful. Hue angle

  15. Nontransformed vs transformed Lab Light Dark Lighntess Chroma Hue angle

  16. RESULTS E-1 Mean values of mixing CIECAM E-1 memory match E-2 simultaneous match

  17. RESULTS E-2 dE LAB dE CAM

  18. dLightness dCroma dHue

  19. Correlation factors for Lab Correlation factors for CAM

  20. CONCLUSION ♦ CIECAM02 has weightily problem with predicting especially the chroma attribute of the color seen with the black background ♦ There is no statistical proof that the background has some influence on color memory shift. There is only slight tendency to memorize the colors as lighter, when they are shown on white background ♦ The lightness shift seems to be correlated to the chroma of original color

  21. FURTHER WORK ♦ More accurate technique of mixing ♦ The variation of the condition with light sources variations as well ♦ Color memory of color pairs

  22. THANK YOU FOR YOUR ATTENTION

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