https://www.viyehni.com/perception daily 0.75 2025-04-02 https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1554776455405-KUG9ZLOSCTW8SWQ9AF9J/Sparrow.png Perception In the simple image at left, a sparrow is seen through some foliage. Due to partial occlusion by the leaves and the branch, the sparrow projects to the retina in disconnected, spatially separated patches. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1554792140237-DF1ITXAUDJCLRBBFQNZ8/Rotation+drawing_site_working.png Perception In the image above, a dark grey bar is partially occluded by a light teal box. The two edges, A and B, can be connected by an interpolated edge because they are relatable - that is, they can be connected by a smooth, monotonic curve that bends through fewer than ninety degrees. At right, a subset of other orientations that Edge B could take and still be relatable with A is illustrated. At left, the T-junction in which Edge A terminates is highlighted. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1554785712584-5QJ16YINVYZYHY4GMBTY/path+detection+example.png Perception https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1554784029362-R0TMHIMJC9D3GJ7CW9U8/1.png Perception https://www.viyehni.com/contact daily 0.75 2024-03-15 https://www.viyehni.com/about-me daily 0.75 2024-11-12 https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555022861628-LGJH1DL6Q0KYDA4BPQS4/2016-07-15%2B06.40.40.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555023123919-X53CGX5ZXZ54XLQ56WNR/image-asset.jpeg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555023986690-9ZBVP507T4E19E1YHUJD/20160909_173257.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1554943557727-K80ZSQ53DPCCU8OZIOZS/20160827_152634.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555023791982-E9J6444F6X0VRYRZJ6DK/20160827_152724.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555005699598-06RXPNXXNXN6WGIGIC8X/image-asset.jpeg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555022552225-062U4YUMDD0OTB4EVH1Z/IMG_7818.JPG Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555024357463-5F0MJEXKXJKAFJC5KQBR/20160908_160831.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/f8b90f22-fe24-45bb-90b4-8e00ab8fcc21/DSCF3383.JPG Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555024843594-2KJM26Y5GBV47O8618PP/IMG_7662.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1683ff66-e5f7-43b9-b33d-2a5b3ef450e6/20170320_051849.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/9e9e0843-c6ab-472d-853d-8fc1b4e576e4/20170329_175505.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1554939114488-B0B2S2JQ4S6MF1XAJSU8/2017-07-01+17.32.52-1.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/b4dde843-2e5b-456b-8c48-b85beec5d0ba/2018-08-19+11.24.35.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/123e4b67-1fc0-4a7e-92ce-fb708f18ca1b/2017-07-30+16.17.29.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/0963126f-4e18-4218-a476-a4f8180bf6e8/20160815_122615.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1409d3c4-e992-4d1c-9a46-5593bae518fc/20160817_162557.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/80a881f4-da9b-4fbf-b72e-e84e640ad957/DSC_0969.JPG Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/88a8db40-9d8d-4c65-9151-806b1f601a82/2016-07-15+06.44.30.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1554942215814-LRXWORKAEXVSOVXO51JY/102.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/c5513dc9-3372-4e28-bdb7-d6819d981295/2016-07-30+18.03.17.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1554938948407-ZRXLLBEU0D37R1UGZGLR/20160911_145147.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1554939406048-DQ4ARFEB8HFZ85YHO2U7/20160111_035458.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/57d4e771-e675-4043-8b0c-d4c1f41eee3d/DSCF3502.JPG Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/a3d6166c-49f3-4657-a1b5-508c0fcf9b46/2016-07-30+19.28.35.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555020978178-IQWBZCKE4I4E2XMSRL3K/20170329_120535.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/8d665885-e81d-4c86-9135-1ba8f025f39b/2017-05-19+14.50.46.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/b9931630-73a9-4ca8-8122-1f8cf27b5ca4/2017-05-19+16.27.35+HDR.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/a3b0c640-98bc-4636-9c22-bcb60d83d3e9/2017-07-02+19.42.43.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/885097e6-f79b-4df3-818e-427be506370d/2017-07-02+20.50.10+HDR.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/2de3e560-ca3d-42f8-9bd3-50254d8a73dd/2017-07-02+21.04.31.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/6a155063-b354-4a64-9833-0c8b45a87a4d/2017-09-15+10.04.39.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/e700bb3c-19b5-4568-85a9-99581243c39e/2017-12-20+14.51.32.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/e96f0877-8264-45e5-9f8a-591ce1913ef2/DSC_0861-2.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555023877110-YSLVE9HIZRPBQKVFS1GR/2017-08-31+18.45.03.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555022939276-N3SQKCSDG0ZUPTK3471P/2016-07-15+07.26.52.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1554896611540-7A8R43UAR29AUZMZ3Q9F/2017-12-24+13.49.11.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1554941694137-TDCXGQGC8Y87KHHOKDA8/IMG_7599.JPG Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555007471798-FJNMTWGEHU42DH291NHB/20160911_145126.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555005132550-E8R1GRPHXZDMAW4GAEG8/20160111_035441.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/4ed0cd6d-53df-4b1d-8aea-99dbc72fdabc/2016-07-30+20.14.27.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555020768204-4U9GT60HPSPIT8HNP7BM/20170327_111912.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555020805829-D5F6JQLIIMTLO5WWIIKS/20170327_113524.jpg Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555008699997-D7TF6XYZBCVNMQLAQMOY/IMG_7794.JPG Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1554940325309-GBQ2MLS7N9MVG4PP0CVZ/IMG_7591.JPG Photography https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/77e9b140-99e4-4334-bb88-12d894ea7b16/20160111_020039.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/27a9421a-a1c1-4c4f-81b0-35c85b961970/20160909_191123.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/48f8efed-43bd-447b-b5fa-559fb71fc41b/20160910_134241.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/18f5c556-0939-48cd-89db-86996c0a1c40/DSC_0051-2.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/45f49d13-c099-4d85-9205-1ae590b911b3/DSC_0149-3.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/5ceb86a7-81f7-4e1f-91e6-c7af0eaac9d3/DSC_0549_1.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/b900bfc8-90aa-4396-b32e-b8de0243aff0/DSC_0671_2.jpg Photography - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.viyehni.com/stage1 daily 0.75 2024-04-17 https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555210663725-K8XGPEWDSWZEP3FPUJDE/path+detection+example2.png Stage1 At left, a “target”, composed of 8 elements whose positions and orientations are organized to define a path, is shown. At right, that same “target” is hidden within a background consisting of elements with random orientations and positions. In this particular stimulus, the positions & orientations of the elements within the target are held to certain geometric constraints. As a result, observers will likely readily detect the target in the image at right. As the element positions and orientations are instead allowed to violate these certain constraints, the detectability of the target is reduced. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555224629707-KLW0M37POYT1OA9XZ5UX/path+detection+example_step_edges.png Stage1 At left, a target path, composed of 8 elements, is set against a random background. At right, the target is isolated. Because it is plausible that a grey bar is partially occluding some black circles and lacks contrast with its grey background, the observer may perceive interpolated grey edges traversing the gaps between the elements. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555220895326-BFJI5FPFB07T6Q19BWB7/Misalignment_Constraint.png Stage1 The retinal tolerance for misalignment means that fragments that appear connected from far away may appear disconnected up close. Here, nearness to the object is mimicked by enlarging the size of the image. The distant misaligned fragments may appear connected, while they appear disconnected up close (percept depends on absolute retinal sizes and thus, will vary depending on monitor size and resolution as well as viewing distance). https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555226228691-INC73DSXVR0YXH6RS3EQ/path_misalignment.png Stage1 Example stimuli from Experiment 2. In a) and c), grey-centered and white-centered elements are perfectly aligned to a horizontal path. In b) and d), elements are misaligned. Both element type and misalignment (0, 4, 8, 12, 16, 20, 24, or 28 arcminutes) were varied across trials. Interpolated contours are expected to be perceived only for the grey-centered elements. In addition, for those elements, ratings of contour clarity should decrease with increasing misalignment, mirroring the decreases in path detection performance. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555224278803-UUBQ9JZXLZ5P6N7JHJ8V/Path_data.png Stage1 Superimposed selection of data from both experiments. Path detection data are illustrated with solid lines while contour clarity ratings are illustrated with dashed lines. The y-axis for contour clarity ratings is given at right. Interpolated contours were perceived only for the grey-centered (and not the white-centered) elements: the contour clarity ratings for the white-centered Gabors are flat across the entire range of misalignments, while contour clarity ratings for grey-centered Gabors decrease with increasing misalignment, reaching a plateau at 16 arcminutes. This pattern of deterioration is highly similar to the deterioration observed for the path detection performance for both Gabor types. https://www.viyehni.com/stage2 daily 0.75 2024-04-17 https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555296386105-XGXQW8T8K09BNVQIB4KL/He_site.png Stage2 Redrawing of “illusory-O” figures from Su, He, & Ooi (2010a, 2010b). Gaps between relatable edge fragments have the same color and brightness as the background. The gaps could be perceived to be caused by a ring or “O” shaped object that lies on top of the bars and which has the same color as the background. In a), relatable edge fragments in the same wheel spoke have identical luminance and color, and an “illusory-O” with grey color is typically perceived to lie atop otherwise complete spokes. In b), relatable edge fragments have opposite luminance contrast polarities relative to the background (one fragment is white while the other is black), and the perception of the “illusory-O” is typically eliminated. c) and d) replicate these effects with stimuli with the same c) (“illusory-O” is perceived) or opposite d) (“illusory-O is not typically perceived) color contrast. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555299207332-MU8VCUHTVZY3X704IV58/illusory_contours_filled_vs_outline.png Stage2 https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555298034628-8R5JB0JOF7R9LLVCXIPN/frequencies.png Stage2 The visual system picks up Information about edges with different spatial frequencies in separate channels. a) shows a complete image, while b) and c) show the relatively low frequency and high frequency edges, respectively. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555300467219-F64FCRDLAYFJ66A24NYQ/1.png Stage2 Hidden within a background of randomly arranged alphanumeric character fragments is one partially occluded whole number or letter. For this particular stimulus, it is the number “2”, hidden in the upper left of the image. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555301730871-YKMYH28SEYCCD0YOFNN3/stimulus_examples.png Stage2 Example stimuli from Experiment set 1. From left to right, top to bottom, the stimulus images manipulate border ownership cues, luminance contrast polarity, spatial frequency of edges, and color contrast. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1555304096290-TC84R37BD6YO2JXIL05R/LCP_results.png Stage2 Results for the luminance contrast polarity manipulation relative to the control. Significant differences in recognition accuracy, in the expected direction, appear from 150ms onward. https://www.viyehni.com/homepage daily 1.0 2024-11-12 https://www.viyehni.com/art daily 0.75 2025-04-08 https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/3eee847f-c386-4801-9486-49d5464846dc/Portrait_of_dad_small.jpg Art - Make it stand out A portrait of my father. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/6c155c30-c748-4a8a-a9bf-6b157555cb30/Hess_small.jpg Art - Make it stand out An exploration of how surface and edge factors influence the perception of a unified triangle, located in the upper-right of each image. This piece investigates how we visually group parts into a whole and the perceptual ‘pop-out’ effect of a cohesive shape. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/595b9713-c3fd-479b-b7bf-28280e56cb2c/ring_through_paper.jpg Art - Make it stand out Our visual system uses fragmented cues to complete the perception of a ring, which appears to float in front of parts of the scene while seeming partially hidden behind others. This piece illustrates how we mentally ‘fill in’ missing information to create a coherent image. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/b99fa608-d5fe-4bd5-9780-1dcfc1921e3b/selfportrait_smaller.jpg Art - Make it stand out A self-portrait. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1cc354db-d102-4180-b0a7-d66e0d70e3c9/depth_pairs.jpg Art - Make it stand out Crossing your eyes while viewing these three pairs of images reveals the objects as positioned on different depth planes. The partially hidden figure appears to pop forward in the top pair, recede into the background in the middle pair, and rest at an intermediate depth in the bottom pair. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/d3574210-5fbd-42cb-bf0f-89e7a2dfd2dd/cups.jpg Art - Make it stand out This piece highlights how local edge geometry is dominant in determining which edge pairs we perceive as connected. When edge geometry is ambiguous, other factors—such as symmetry and closure—help guide our perception, revealing the complex interplay of scene cues in visual organization. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/9e8c14f1-5b24-44d8-aed7-dcd12399bbe5/Bonnie_small_clearer.jpg Art - Make it stand out A childhood portrait of my great-grandmother Bonnie with her siblings. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/3edd11b2-61bc-4490-bd49-dda70a039475/illusory_contours_small.jpg Art - Make it stand out This piece showcases 'illusory edges'—edges that seem to lie in front of other elements in the scene, despite the absence of any actual contrast. The visual system relies on edge geometry to perceptually 'fill in' these edges, bridging gaps in the information received by the eyes. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/186910a4-2769-4630-966b-40fe74b50cba/parallelism_small.jpg Art - Make it stand out Once again, local edge geometry helps fill in gaps in the visual input. In this piece, the effect of parallelism is shown, where the alignment of edges weakens the strength of the filled-in edges. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/2d24368e-6f14-4527-b205-46af98b592d0/mask_smaller.jpg Art - Make it stand out The seat of perception and the window to the soul—eyes (of many creatures, not just humans!) are one of my favorite subjects to explore. https://www.viyehni.com/research daily 0.75 2025-04-17 https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/6c418c89-a2ca-459b-b130-a1e8fe31a631/Figure_BrowseDisplay+copy-01.png Research Portfolio - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/e659fe2b-4f65-47f0-b4de-7693e80f0dec/Figure_HomeDisplayYourNeighborhood.png Research Portfolio - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1329e42d-c717-4931-a663-dc7262c2a10c/Profile+Screen.png Research Portfolio - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/e1788c59-b6e2-421b-967b-0eb67d249c4e/Shy+Sophia_4+1.png Research Portfolio - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/8b446be9-fb44-44d4-9cf3-8ec0a315f431/Outgoing+Owen+4_1.png Research Portfolio - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/1554776455405-KUG9ZLOSCTW8SWQ9AF9J/Sparrow.png Research Portfolio - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.viyehni.com/research-process daily 0.75 2025-04-07 https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/08f036fa-e2ce-43f1-b19b-9c071d64f71c/UX+Research+Process.PNG Research Process - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.viyehni.com/aboutme daily 0.75 2025-01-28 https://images.squarespace-cdn.com/content/v1/5cabb54f93a6327b363a3d58/08c11848-f4a6-4df8-8f19-1ea763243563/Vi_11_11.jpg About Me - Make it stand out Whatever it is, the way you tell your story online can make all the difference.