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A granny square worked in two colors and seven rounds. Cotton, four-millimetre (0.16 in) crochet hook. A granny square is a piece of square fabric produced in crochet by working in rounds from the center outward. Granny squares are traditionally handmade as crochet and cannot be manufactured by machine. They resemble coarse lace.
Illusion knitting or shadow knitting is a form of textile art, in which the knitting is viewed as simply narrow stripes from one angle, and as an image when viewed from another angle. [1] Illusion knitting has been recognised as an art form since 2010, largely due to the advances made by Steve Plummer who has created several large and detailed ...
Blue–red contrast demonstrating depth perception effects 3 Layers of depths "Rivers, Valleys & Mountains". Chromostereopsis is a visual illusion whereby the impression of depth is conveyed in two-dimensional color images, usually of red–blue or red–green colors, but can also be perceived with red–grey or blue–grey images.
An illusion closely related to the checker shadow illusion, which also relies on using implied visual shadows to seemingly darken a brighter region to the same color as a well-lit dark region, involves two squares placed at an angle, with the darker square being lit and the lighter square at an angle which receives poor light. [2]
Date/Time Thumbnail Dimensions User Comment; current: 03:17, 1 May 2010: 764 × 591 (22 KB): ZooFari: Create duplicate, offset checker board to fix line gaps: 18:30, 25 July 2008
The Ehrenstein illusion is of a bright disc. Closely related to Kanizsa figures is the Ehrenstein illusion. Instead of employing circles with missing wedges, the Ehrenstein illusion triggers an illusory contour percept via radial line segments. Ehrenstein's discovery was originally contextualized as a modification of the Hermann grid. [3]
The following other wikis use this file: Usage on ar.wikipedia.org خدعة رقعة الشطرنج; فلسفة الإدراك; قائمة الخدع البصرية
An animated sequence of simulated appearances of a red flower (of a zonal geranium) and background foliage under photopic, mesopic, and scotopic conditions. The Purkinje effect or Purkinje phenomenon (Czech: [ˈpurkɪɲɛ] ⓘ; sometimes called the Purkinje shift, often pronounced / p ər ˈ k ɪ n dʒ i /) [1] is the tendency for the peak luminance sensitivity of the eye to shift toward the ...