A model for simulating the photographic development process on digital images

Geigel, Joe; Musgrave, F. Kenton

doi:10.1145/258734.258813

Cited by 23 publications

(17 citation statements)

References 13 publications

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“…We are not trying to closely mimic the actual photographic process [Geigel and Musgrave 1997], but instead use the basic conceptual framework of the Zone System to manage choices in tone reproduction. We first apply a scaling that is analogous to setting exposure in a camera.…”

Section: Algorithmmentioning

confidence: 99%

Photographic tone reproduction for digital images

et al. 2002

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A classic photographic task is the mapping of the potentially high dynamic range of real world luminances to the low dynamic range of the photographic print. This tone reproduction problem is also faced by computer graphics practitioners who map digital images to a low dynamic range print or screen. The work presented in this paper leverages the time-tested techniques of photographic practice to develop a new tone reproduction operator. In particular, we use and extend the techniques developed by Ansel Adams to deal with digital images. The resulting algorithm is simple and produces good results for a wide variety of images.

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Section: Algorithmmentioning

confidence: 99%

Photographic tone reproduction for digital images

et al. 2002

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“…One of the shortcomings in this model is that the curve codomain which is the pixel intensities is expressed in linear manner. Chemical titration simulation process Samples positive-negative detection method ImageTitre [12] Image processing (Software-Automatic) Manual PolyTitre [3] Light Intensity (Hardware-Manual) Manual Patent DE2008001894 [6] Camera (Hardware-Automatic) Automatic Proposed Method Image processing (Software-Automatic) Automatic Similarly to Bhukhanwala and Ramabadran, Geigel [4] used the HD curve of which the information is adapted from the real photographic hardware, in order to simulate the effect of exposure time on images. By using this information, he was then able to develop a virtual darkroom which digitally simulates the photographic process.…”

Section: A Simulating Exposure Time By Using Exposure-density Curve mentioning

confidence: 99%

“…This means, every sample image is only taken once with the same exposure time. Furthermore, unlike ImageTitre, this simulation uses a realistic camera model based on sensitometry [4]. Using this method, the processing time will be much faster than described by Hiemann [5].…”

Section: Introductionmentioning

confidence: 99%

An Automatic Image Based Single Dilution Method for End Point Titre Quantitation of Antinuclear Antibodies Tests Using HEp-2 Cells

Wiliem

Hobson

Minchin

et al. 2011

2011 International Conference on Digital Image Computing: Techniques and Applications

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Indirect Immunofluorescence (IIF) on Human epithelial (HEp-2) cells test has been the golden standard for identifying the presence of Anti-Nuclear Antibodies (ANA) due to its high sensitivity and the large range of antigens that can be detected. Furthermore, IIF ANA test allows the positive sample strength (sample end point titre) to be reported. Despite its advantages, the IIF ANA test needs to be performed manually, and therefore it is perceived as an expensive and laborious process. This also applies to determining the strength of positive samples (end point titre) which traditionally is done by serially diluting the specimen. In this paper, we present an imagebased method which is able to automatically determine the end point titre of positive samples based only on a single screening dilution. This can be done by simulating the manual titration process using a mathematical model of the exposure-density curve. Technically, a new Image Titration Endpoint (ITE) unit based on the model is introduced. Each specimen image is then measured in terms of this unit. Finally, the end point titre for the specimen is determined through a standard curve which specifies the end point titre given an ITE unit. This process is fully automated which would give an advantage over the current digital titration methods. The overall endpoint titre agreement between the proposed approach and the manual serial dilution method in the evaluation of 134 positive samples was 100%. This high agreement demonstrates that the proposed approach is suitable for routine ANA IIF testing in the clinical settings.

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“…Our work builds on local tone mapping where the mapping varies according to the neighborhood of a pixel [Pattanaik et al 1998;Tumblin and Turk 1999;Reinhard et al 2002;Durand and Dorsey 2002;Fattal et al 2002;Li et al 2005]. The precise characteristics of film have also been reproduced [Geigel and Musgrave 1997;Reinhard et al 2002]. However, most techniques seek an objective rendering of the input, while we want to facilitate the exploration and transfer of particular pictorial looks.…”

Section: Related Workmentioning

confidence: 99%

Two-scale tone management for photographic look

2006

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a) input (b) sample possible renditions: bright and sharp, gray and highly detailed, and contrasted, smooth and grainy Figure 1: This paper describes a technique to enhance photographs. We equip the user with powerful filters that control several aspects of an image such as its tonal balance and its texture. We make it possible for anyone to explore various renditions of a scene in a few clicks. We provide an effective approach to aesthetic choices, easing the creation of compelling pictures. AbstractWe introduce a new approach to tone management for photographs. Whereas traditional tone-mapping operators target a neutral and faithful rendition of the input image, we explore pictorial looks by controlling visual qualities such as the tonal balance and the amount of detail. Our method is based on a two-scale non-linear decomposition of an image. We modify the different layers based on their histograms and introduce a technique that controls the spatial variation of detail. We introduce a Poisson correction that prevents potential gradient reversal and preserves detail. In addition to directly controlling the parameters, the user can transfer the look of a model photograph to the picture being edited.

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A model for simulating the photographic development process on digital images

Cited by 23 publications

References 13 publications

Photographic tone reproduction for digital images

Photographic tone reproduction for digital images

An Automatic Image Based Single Dilution Method for End Point Titre Quantitation of Antinuclear Antibodies Tests Using HEp-2 Cells

Two-scale tone management for photographic look

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