生物医学图像处理：人眼视觉特性

人眼视觉特性 要 人眼视觉 人眼非正常视觉 人眼错觉

要点： ▪ 人眼视觉 ▪ 人眼非正常视觉 ▪ 人眼错觉 人眼视觉特性

人眼视觉 感光细胞( photoreceptor cells) 杆状细胞(rod):单色夜视 锥状细胞(cone):彩色视觉 绿( green 蓝(blue) Primary Color基色

人眼视觉 感光细胞(photoreceptor cells)： 杆状细胞(rod)：单色夜视 锥状细胞(cone)：彩色视觉 红(red) 绿(green) 蓝(blue) Primary Color 基色

Courtesy of the National Eye Institute click on numbered labels Eyelid for more inform ation over 2 ris 6 Lens 10 Optic Nerve 3 Pupil 7 Macula Optic 4 Cornea Disc Vitreous Humor 11 Choroid 12 Retina 14 Extraocular Muscle 15 Visual Pathw ays of the Brain Table of contents

Retina Optic nerve Optic chiasma Lateral geniculate nucleus Optic radiations Visual cortey More detailed look at lgn cortex Master Diagram

ventriculus pars centralis sin cornu anterius sin thalamus. cornu posterius dext chiasma opticum cornu inferius dext bulbus oculi sin ventriculus quartus- nervus opticus sin nervus opticus dext bulbus oculi dext Example image of VoXEL-MAN/brain e 1994 IMDM University Hamburg, Germany

Image formation in the eye 15 C is the optical center of the lens

Retina You can click on the names of the neurons(eg receptors) to obtain more information receptors horizontal bipolar midget bipolar cells→aot bistratfied ganglion cells analine puc nerves Human retma Table of Contents light micrograph」ght Master diagram Light enters the retina on the side containing the optic nerves and travels through all the layer before reaching the receptors

Light enters the retina on the side containing the optic nerves and travels through all the layer before reaching the receptors. Retina

How light enters the retina and is transmitted out the optic nerve This animated cartoon illustrates how light (white dot)enters the retina on the side containing the optic nerves and travels through all of the retinal layers before finally being absorbed by the photopigments in the outer segments of the receptors. A neural signal (yellow dot)is generated in the receptors which then travels through the neurons of the various retinal layers and finally travels out through the optic nerve up to the lateral geniculate nucleus

This animated cartoon illustrates how light (white dot) enters the retina on the side containing the optic nerves and travels through all of the retinal layers before finally being absorbed by the photopigments in the outer segments of the receptors. A neural signal (yellow dot) is generated in the receptors which then travels through the neurons of the various retinal layers and finally travels out through the optic nerve up to the lateral geniculate nucleus. How light enters the retina and is transmitted out the optic nerve

Ph ION OPL% IPL GCL L 多

Electron Micrograph h of Human Visual Receptors rods cones

Electron Micrograph of Human Visual Receptors