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. 2010 Sep;30(5):626-31.
doi: 10.1111/j.1475-1313.2010.00722.x.

The role of color in recognizing material changes

Ali Yoonessi  1 , Qasim Zaidi
Affiliations

The role of color in recognizing material changes

Ali Yoonessi et al. Ophthalmic Physiol Opt. 2010 Sep.

Abstract

The chemical and physical properties of objects provide them with specific surface patterns of color and texture. Endogenous and exogenous forces alter these colors and patterns over time. The ability to identify these changes can have great utility in judging the state and history of objects. To evaluate the role of color cues in this process, we used images of 26 materials undergoing real changes. Observers were asked to identify materials and types of changes for color and gray-scale images. The images were shown in three sets; one image of the surface, two images of the same surface before and after a natural change, and image sequences of the time-varying appearance. The presence of color cues improved performance in all conditions. Identification of materials improved if observers saw two states of the material, but the complete image sequence did not improve performance.

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Figures

Figure 1
Figure 1
Twenty six samples from the STAF database; first (left) and last image (right) in the change sequence.
Figure 2
Figure 2
Examples of materials with the sequence of images showing their changes over time.
Figure 3
Figure 3
Average percent correct over five observers in each case for identifying the type of material in color and gray-scale images. The bottom row shows the log odds-ratio of the difference.
Figure 4
Figure 4
Average percent correct over five observers in each case for identifying the type of material change in color and gray-scale images. The extreme right figure shows the log odds-ratio of the difference.
Figure 5
Figure 5
Log odds-ratio for identifying the type of material category in color and gray-scale images.
See this image and copyright information in PMC

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