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High Dynamic Range based on DIGITAL ZONE SYSTEM -A Focus on Adobe Photoshop-

  • Journal of Communication Design
  • Abbr : JCD
  • 2020, 73(), pp.511-524
  • DOI : 10.25111/jcd.2020.73.37
  • Publisher : CDAK Society of Communication Design
  • Research Area : Arts and Kinesiology > Design > Visual Information Design > Information Design
  • Received : September 4, 2020
  • Accepted : October 27, 2020
  • Published : October 31, 2020

Yun Chan-hee 1

1스튜디오 양파벌레

Accredited

ABSTRACT

The ZONE SYSTEM was able to develop into a full range of photographic materials in the 1970s when the theory of characteristic curves and photometric measurements of Hurt Triffiedld was established, and was published and organized by Ansl Adams and Fred Archer in 1939. The zone system was a method for obtaining systematic and technical results by adjusting the concentration through increase and decrease in the filming and status process. Moving on to the digital age, the form of silver film is the CMOS( Complementary Metal Oxide Semiconductor), a digital image sensor. It was replaced by a and darkroom was transformed into a digital darkroom (such as Adobe Photoshop) The transformation of digital images has evolved in a variety of ways, especially HDR High Dynamic Range's technology has made many advances and has begun to be applied in general real life. (TV, cell phone HDR shooting, digital camera highlight tone-first HDR filming method) Thus, the research method of this paper is to digitally convert RAW (a file format that stores data without processing or compression from sensors in digital cameras) images into appropriate images (JPG) without adjusting exposure. The same RAW file is then converted once again to JPG with multiple exposure changes through a multiplication or decrease with proper exposure, and the files are generated as a single HDR JPG image through "HDR IMAGE MAAPPING SOFTWARE". A single JPG made without exposure adjustment and a JPG with HDR are represented on a digital zone scale converted to a "PHOTOSHOP" RGB value. At this time, digitize and compare the digital zone scale of JPG of the two files, and check if there is a change in zone of each file. JPG and HDR show that the zone of ZONE "0" is moved to ZONE "I," eliminating Shadow and increasing the ZONE scale to ZONE "VII." This means that when HDR is applied, exposure to the shadow increases and the highlights remain unchanged. However, in the case of the mid-area Jones Cale, it can be seen that it is more distributed in the shadow and highlight sections, creating a rich genealogy. This shows that HDR has a brighter shadow area than a single JPG, but the results show that the middle gene does not change drastically based on the shadow and highlights of a single JPG zone scale when simply exposed. We hope this study will serve as a reference for future HDR image variations.

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