acutancen.

Brit.

/əˈkjuːt(ə)ns/, U.S.

/əˈkjutns/

Origin: Formed within English, by derivation. Etymons: acute adj., -ance suffix.

Etymology: < acute adj. + -ance suffix. Compare earlier acuteness n.

The sharpness of a photographic or printed image; a numerical measure of this.

ΘΚΠ

society > leisure > the arts > visual arts > photography > a photograph > qualities and effects > [noun] > other qualities and effects

ghost1851

solarization1853

flare1867

bronzing1868

ghost image1872

shine1880

orthochromatism1889

false image1892

flare-spot1893

halo1941

acutance1952

1952 G. C. Higgins & L. A. Jones in Jrnl. Soc. Motion Picture & Television Engineers 58 279/2 We suggest that physical measurements based upon the density variation across a knife-edge image be termed ‘acutance’.

1957 T. L. J. Bentley Man. Miniature Camera (ed. 5) vi. 82 The sharpness of the edge of hard lines is now becoming known by such terms as ‘acutance’, ‘edge sharpness’, [etc.].

1967 E. Chambers Photolitho-offset 268 Acutance, physical measure of image sharpness intended to correlate with the visual assessment of sharpness.

1979 Mod. Photogr. Dec. 206/1 CU's hazily described test for sharpness is more like a test for film acutance which must be measured by a microdensitometer.

1991 Photographer Oct. 42/1 This will adversely affect acutance, seriously reducing resolution and thereby limiting the definition obtainable on the subsequent print.

Compounds

acutance developer n. a photographic developer formulated to increase the acutance of the developed image.

ΘΚΠ

society > leisure > the arts > visual arts > photography > chemicals > [noun] > developer

developer1855

paraphenylenediamine1873

rodinal1892

glycin1893

amidol1894

Adurol1898

soup1929

acutance developer1961

1960 Industr. Photogr. May 72/2 A new, fine grain, high acutance developer..has been announced by Eastman Kodak Co.]

1961 Brit. Jrnl. Photogr. 27 Jan. 49/1 Add to FX1 working solution..40 gm/litre..of anhydrous sodium sulphite. This forms a ‘safe’ acutance developer for all grain structure groups.

1979 SLR Camera June 113/1 Indeed it may be worth using an acutance developer to further increase the apparent sharpness of contre-jour pictures.

1998 S. G. Anchell & B. Troop Film Developing Cookbk. vi. 59 Although acutance developers increase graininess, Rodinal can be used successfully with fast 35mm films.

This entry has been updated (OED Third Edition, December 2011; most recently modified version published online December 2021).

单词	acutance
释义	acutancen. Brit. /əˈkjuːt(ə)ns/, U.S. /əˈkjutns/ Origin: Formed within English, by derivation. Etymons: acute adj., -ance suffix. Etymology: < acute adj. + -ance suffix. Compare earlier acuteness n. The sharpness of a photographic or printed image; a numerical measure of this. ΘΚΠ society > leisure > the arts > visual arts > photography > a photograph > qualities and effects > [noun] > other qualities and effects ghost1851 solarization1853 flare1867 bronzing1868 ghost image1872 shine1880 orthochromatism1889 false image1892 flare-spot1893 halo1941 acutance1952 1952 G. C. Higgins & L. A. Jones in Jrnl. Soc. Motion Picture & Television Engineers 58 279/2 We suggest that physical measurements based upon the density variation across a knife-edge image be termed ‘acutance’. 1957 T. L. J. Bentley Man. Miniature Camera (ed. 5) vi. 82 The sharpness of the edge of hard lines is now becoming known by such terms as ‘acutance’, ‘edge sharpness’, [etc.]. 1967 E. Chambers Photolitho-offset 268 Acutance, physical measure of image sharpness intended to correlate with the visual assessment of sharpness. 1979 Mod. Photogr. Dec. 206/1 CU's hazily described test for sharpness is more like a test for film acutance which must be measured by a microdensitometer. 1991 Photographer Oct. 42/1 This will adversely affect acutance, seriously reducing resolution and thereby limiting the definition obtainable on the subsequent print. Compounds acutance developer n. a photographic developer formulated to increase the acutance of the developed image. ΘΚΠ society > leisure > the arts > visual arts > photography > chemicals > [noun] > developer developer1855 paraphenylenediamine1873 rodinal1892 glycin1893 amidol1894 Adurol1898 soup1929 acutance developer1961 1960 Industr. Photogr. May 72/2 A new, fine grain, high acutance developer..has been announced by Eastman Kodak Co.] 1961 Brit. Jrnl. Photogr. 27 Jan. 49/1 Add to FX1 working solution..40 gm/litre..of anhydrous sodium sulphite. This forms a ‘safe’ acutance developer for all grain structure groups. 1979 SLR Camera June 113/1 Indeed it may be worth using an acutance developer to further increase the apparent sharpness of contre-jour pictures. 1998 S. G. Anchell & B. Troop Film Developing Cookbk. vi. 59 Although acutance developers increase graininess, Rodinal can be used successfully with fast 35mm films. This entry has been updated (OED Third Edition, December 2011; most recently modified version published online December 2021). < n.1952
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