DE585225C - Process for increasing the differences in brightness in single-lens reflex images - Google Patents

Process for increasing the differences in brightness in single-lens reflex images

Info

Publication number
DE585225C
DE585225C DEE42949D DEE0042949D DE585225C DE 585225 C DE585225 C DE 585225C DE E42949 D DEE42949 D DE E42949D DE E0042949 D DEE0042949 D DE E0042949D DE 585225 C DE585225 C DE 585225C
Authority
DE
Germany
Prior art keywords
image
brightness
differences
increasing
lens reflex
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEE42949D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eckelt & Co Appbau
Original Assignee
Eckelt & Co Appbau
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eckelt & Co Appbau filed Critical Eckelt & Co Appbau
Priority to DEE42949D priority Critical patent/DE585225C/en
Application granted granted Critical
Publication of DE585225C publication Critical patent/DE585225C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C11/00—Auxiliary processes in photography
    • G03C11/06—Smoothing; Renovating; Roughening; Matting; Cleaning; Lubricating; Flame-retardant treatments

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Instructional Devices (AREA)

Description

Verfahren zur. Steigerung der Helligkeitsunterschiede bei Spiegelreflexbildern Im auffallenden Licht zu projizierende Bilder mit spiegelnder Oberfläche des Bildträgers sind schon bekannt.Procedure for. Increase in the differences in brightness in single-lens reflex images Images to be projected in incident light with a reflective surface of the image carrier are already known.

Bei diesen Bildern, z. B. Lichtbildern, gelangen die auffallenden Lichtstrahlen nur dort, wo das Schichtmaterial (Gelatine) glas= klar ist, ungehindert auf die spiegelnde Bildträgerfläche, von welcher sie gerichtet in das Auge oder Objektiv reflektiert werden. Es sind dies die hellsten Stellen des Bildes, während .das -.in /der Schicht eingebettete, reduzierte, schwarze Silberkorn das Licht mehr oder weniger absorbiert und :die Schatten und Halbschatten des Bildes darstellt.In these pictures, e.g. B. Photos, get the striking Light rays only where the layer material (gelatine) is glass = clear, unhindered onto the reflective image carrier surface from which it is directed into the eye or Objectively reflected. These are the brightest parts of the picture while The black silver grain embedded in the layer reduced the light more or less absorbed and: represents the shadow and penumbra of the image.

Es hat sich nun gezeigt, daß bei der Betrachtung oder Projektion derartiger Bilder die Bildschatten und Halbschatten eine Aufhellung erfahren, ad. h. daß das Bild flau wird. Diese Aufhellung kommt dadurch zustande, daß auch die glatte Oberfläche der schwärzen Bildteile einen Teil der auffallenden Lichtstrahlen gerichtet reflektiert.It has now been shown that when viewing or projecting such Images the image shadows and penumbra are brightened, ad. H. that this Picture becomes dull. This brightening is due to the fact that the smooth surface the black parts of the image reflect part of the incident light rays in a directed manner.

Erfindungsgemäß wird dieser Übelstand daidurch behoben, daß die Oberflächen der silberhaltigen Bildteile durch ein geeignetes Verfahren abgestumpft oder mattiert werden, und zwar entsprechend ihrem Silbergehalt. Diese .bildabstufungsgemäße Mattierung der Oberfläche .der Schattenstellen und Halbschatten des Bildes -bewirkt eine, Steigerung der Helligkeitsunterschiede, da der Teil .des auffallenden Lichtes, welches nicht absorbiert wird, ari diesen Stellen diffus reflektiert und dadurch eine merkbare Verdunkelung dieser Bildteile eintritt. Die nichtsilberhaltigen Teile des Bildes erfahren keinerlei Mattierung. Die Zusammensetzung des Mattierungsbades ist ein Erfindungsgegenstand für sich und braucht hier nicht erörtert zu werden.According to the invention, this drawback is eliminated by the fact that the surfaces the silver-containing parts of the image are blunted or matted by a suitable process according to their silver content. This .image gradation according to matting the surface, the shadows and penumbra of the picture - causes an increase the differences in brightness, since the part of the incident light which is not is absorbed, ari diffusely reflected at these points and thus a noticeable Darkening of these parts of the image occurs. The non-silver parts of the picture do not experience any matting. The composition of the matting bath is a Subject of the invention in itself and need not be discussed here.

Claims (1)

PATENTANSPRÜCHE: i. Verfahren zur Steigerung der Helligkeitsunterschiede bei Spiegelreflexbillern, .dadurch gekennzeichnet, daß die Oberflächen der Bildschatten und Halbschatten bildabstufungsmäßig stumpf (mattiert) ausgeführt werden. a. Verfahren zur Steigerung der Helligkeitsunterschiede bei Spiegelreflexbildern nach Anspruch i, dadurch gekennzeichnet, daß bei Lichtbildern die Oberflächen .der silberhaltigen Bildteile entsprechend ihrem Silbergehalt mattiert werden. 3. Spiegelreflexbild nach Verfahren der Ansprüche i und z, dadurch gekennzeichnet, daß die Oberflächen der Bildschatten und Halbschatten bildabstufungsgemäß :stumpf (mattiert) sind.PATENT CLAIMS: i. Process for increasing the differences in brightness in SLR,. characterized in that the surfaces of the image shadows and penumbra are executed in a dull (matt) manner in terms of image gradation. a. procedure to increase the brightness differences in mirror reflex images according to claim i, characterized in that, in the case of photographs, the surfaces .der containing silver Parts of the image are matted according to their silver content. 3. SLR image according to the method of claims i and z, characterized in that the surfaces the image shadows and penumbra according to image gradation: are dull (matted).
DEE42949D 1932-06-23 1932-06-23 Process for increasing the differences in brightness in single-lens reflex images Expired DE585225C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEE42949D DE585225C (en) 1932-06-23 1932-06-23 Process for increasing the differences in brightness in single-lens reflex images

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE42949D DE585225C (en) 1932-06-23 1932-06-23 Process for increasing the differences in brightness in single-lens reflex images

Publications (1)

Publication Number Publication Date
DE585225C true DE585225C (en) 1933-09-29

Family

ID=7079417

Family Applications (1)

Application Number Title Priority Date Filing Date
DEE42949D Expired DE585225C (en) 1932-06-23 1932-06-23 Process for increasing the differences in brightness in single-lens reflex images

Country Status (1)

Country Link
DE (1) DE585225C (en)

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