| 释义 |
speckle
speck·le S0616600 (spĕk′əl)n. A speck or small spot, as a natural dot of color on skin, plumage, or foliage.
[Middle English spakle.]
speck′le v.speckle (ˈspɛkəl) na small or slight mark usually of a contrasting colour, as on the skin, a bird's plumage, or eggsvb (tr) to mark with or as if with speckles[C15: from Middle Dutch spekkel; see speck] ˈspeckled adjspeck•le (ˈspɛk əl)
n., v. -led, -ling. n. 1. a small speck, spot, or mark. 2. speckled coloring or marking. v.t. 3. to mark with or as if with speckles. [1400–50; probably < Middle Dutch spekkel, akin to speck] speckle
Past participle: speckled
Gerund: speckling
| Present |
|---|
| I speckle | | you speckle | | he/she/it speckles | | we speckle | | you speckle | | they speckle |
| Preterite |
|---|
| I speckled | | you speckled | | he/she/it speckled | | we speckled | | you speckled | | they speckled |
| Present Continuous |
|---|
| I am speckling | | you are speckling | | he/she/it is speckling | | we are speckling | | you are speckling | | they are speckling |
| Present Perfect |
|---|
| I have speckled | | you have speckled | | he/she/it has speckled | | we have speckled | | you have speckled | | they have speckled |
| Past Continuous |
|---|
| I was speckling | | you were speckling | | he/she/it was speckling | | we were speckling | | you were speckling | | they were speckling |
| Past Perfect |
|---|
| I had speckled | | you had speckled | | he/she/it had speckled | | we had speckled | | you had speckled | | they had speckled |
| Future |
|---|
| I will speckle | | you will speckle | | he/she/it will speckle | | we will speckle | | you will speckle | | they will speckle |
| Future Perfect |
|---|
| I will have speckled | | you will have speckled | | he/she/it will have speckled | | we will have speckled | | you will have speckled | | they will have speckled |
| Future Continuous |
|---|
| I will be speckling | | you will be speckling | | he/she/it will be speckling | | we will be speckling | | you will be speckling | | they will be speckling |
| Present Perfect Continuous |
|---|
| I have been speckling | | you have been speckling | | he/she/it has been speckling | | we have been speckling | | you have been speckling | | they have been speckling |
| Future Perfect Continuous |
|---|
| I will have been speckling | | you will have been speckling | | he/she/it will have been speckling | | we will have been speckling | | you will have been speckling | | they will have been speckling |
| Past Perfect Continuous |
|---|
| I had been speckling | | you had been speckling | | he/she/it had been speckling | | we had been speckling | | you had been speckling | | they had been speckling |
| Conditional |
|---|
| I would speckle | | you would speckle | | he/she/it would speckle | | we would speckle | | you would speckle | | they would speckle |
| Past Conditional |
|---|
| I would have speckled | | you would have speckled | | he/she/it would have speckled | | we would have speckled | | you would have speckled | | they would have speckled |
Thesaurus| Noun | 1. |  speckle - a small contrasting part of something; "a bald spot"; "a leopard's spots"; "a patch of clouds"; "patches of thin ice"; "a fleck of red"dapple, maculation, patch, fleck, spotmarking - a pattern of marksspeck, pinpoint - a very small spot; "the plane was just a speck in the sky"nebula - (pathology) a faint cloudy spot on the corneasplash - a patch of bright color; "her red hat gave her outfit a splash of color"worn spot, fret - a spot that has been worn away by abrasion or erosionplaque - (pathology) a small abnormal patch on or inside the bodymacule, macula - a patch of skin that is discolored but not usually elevated; caused by various diseasesmock sun, parhelion, sundog - a bright spot on the parhelic circle; caused by diffraction by ice crystals; "two or more parhelia are usually seen at once"macula, sunspot - a cooler darker spot appearing periodically on the sun's photosphere; associated with a strong magnetic fieldfacula - a large bright spot on the sun's photosphere occurring most frequently in the vicinity of sunspotsfacula - a bright spot on a planet | | Verb | 1. | speckle - produce a mottled effect; "The sunlight stippled the trees"stippledapple, mottle, cloud - colour with streaks or blotches of different shades | | 2. |  speckle - mark with small spots; "speckle the wall with tiny yellow spots"bespeckleblob, fleck, blot, spot - make a spot or mark onto; "The wine spotted the tablecloth" |
speckleverbTo mark with many small spots:bespeckle, besprinkle, dapple, dot, fleck, freckle, mottle, pepper, speck, sprinkle, stipple.Translationsspeckle (ˈspekl) noun a little spot on a different-coloured background. The eggs were pale blue with dark green speckles. 斑點 斑点ˈspeckled adjective marked with speckles. 有斑點的 有斑点的speckle
Speckle The generation of a random intensity distribution, called a speckle pattern, when light from a highly coherent source, such as a laser, is scattered by a rough surface or inhomogeneous medium. See Laser The surfaces of most materials are extremely rough on the scale of an optical wavelength (approximately 5 × 10-7 m). When nearly monochromatic light is reflected from such a surface, the optical wave resulting at any moderately distant point consists of many coherent wavelets, each arising from a different microscopic element of the surface. Since the distances traveled by these various wavelets may differ by several wavelengths if the surface is truly rough, the interference of the wavelets of various phases results in the granular pattern of intensity called speckle. If a surface is imaged with a perfectly corrected optical system, diffraction causes a spread of the light at an image point, so that the intensity at a given image point results from the coherent addition of contributions from many independent surface areas. As long as the diffraction-limited point-spread function of the imaging system is broad by comparison with the microscopic surface variations, many dephased coherent contributions add at each image point to give a speckle pattern. The basic random interference phenomenon underlying laser speckle exists for sources other than lasers. For example, it explains radar “clutter,” results for scattering of x-rays by liquids, and electron scattering by amorphous carbon films. Speckle theory also explains why twinkling may be observed for stars, but not for planets. See Coherence, Diffraction, Interference of waves In metrology, the most obvious application of speckle is to the measurement of surface roughness. If a speckle pattern is produced by coherent light incident on a rough surface, then surely the speckle pattern, or at least the statistics of the speckle pattern, must depend upon the detailed surface properties. An application of growing importance in engineering is the use of speckle patterns in the study of object displacements, vibration, and distortion that arise in nondestructive testing of mechanical components. Astronomical speckle interferometry is a technique for obtaining spatial information on astronomical objects at the diffraction-limited resolution of a telescope, despite the presence of atmospheric turbulence. Speckle interferometry techniques have proven to be an invaluable tool for astronomical research, allowing studies of a wide range of scientifically interesting problems. They have been widely used to determine the separation and position angle of binary stars, and for accurate diameter measurements of a large number of stars, planets, and asteroids. Speckle imaging techniques have successfully uncovered details in the morphology of a range of astronomical objects, including the Sun, planets, asteroids, cool giants and supergiants, young stellar objects, the supernova SN1987A in the Large Magellanic Cloud, Seyfert galaxies, and quasars. See Interferometry speckle[′spek·əl] (optics) A phenomenon in which the scattering of light from a highly coherent source, such as a laser, by a rough surface or inhomogeneous medium generates a random-intensity distribution of light that gives the surface or medium a granular appearance. speckle
speckle (spĕk′əl)n. A speck or small spot, as a natural dot of color on skin, plumage, or foliage.
speck′le v.speckleA grainy distortion (a kind of “noise”) in an ultrasonographic image.speckle
Related to speckle: Speckle interferometrySynonyms for speckleverb to mark with many small spotsSynonyms- bespeckle
- besprinkle
- dapple
- dot
- fleck
- freckle
- mottle
- pepper
- speck
- sprinkle
- stipple
Synonyms for specklenoun a small contrasting part of somethingSynonyms- dapple
- maculation
- patch
- fleck
- spot
Related Words- marking
- speck
- pinpoint
- nebula
- splash
- worn spot
- fret
- plaque
- macule
- macula
- mock sun
- parhelion
- sundog
- sunspot
- facula
verb produce a mottled effectSynonymsRelated Wordsverb mark with small spotsSynonymsRelated Words |