Signal characteristics and compression performance evaluation of digital pathological microscopic images with up to SHD resolution

Akira Okumura; Junji Suzuki; Isao Furukawa; Sadayasu Ono; Tsukasa Ashihara

doi:10.1117/12.270050

4 April 1997 Signal characteristics and compression performance evaluation of digital pathological microscopic images with up to SHD resolution

Akira Okumura, Junji Suzuki, Isao Furukawa, Sadayasu Ono, Tsukasa Ashihara

Author Affiliations +

Proceedings Volume 3025, Very High Resolution and Quality Imaging II; (1997) https://doi.org/10.1117/12.270050
Event: Electronic Imaging '97, 1997, San Jose, CA, United States

Abstract

Digitizing high-quality microscopic images and developing input/output technology for displaying those results is critical to tele-pathology in which pathological microscopic images are transferred to remote locations where they are diagnosed by specialists. This paper will discuss the results achieved by directly digitizing pathological microscopic images at a 2k by 2k resolution, and then using a super high definition imaging system to analyze their signals and evaluate compression performance. We will start off by digitizing samples that a pathologist will actually use in making a diagnosis, and then analyze their color distribution and spatial frequencies characteristics by comparing them to general images. This will make it apparent that such pathological images characteristically contain high spatial frequency in their chrominance components. We will also discuss the evaluation results of color differences for L.a.b space and compression ratios achieved when using JPEG to encode pathological images. We will also present a subjective evaluation of the influence sub- sampling of chrominance components has on image quality.

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Akira Okumura, Junji Suzuki, Isao Furukawa, Sadayasu Ono, and Tsukasa Ashihara "Signal characteristics and compression performance evaluation of digital pathological microscopic images with up to SHD resolution", Proc. SPIE 3025, Very High Resolution and Quality Imaging II, (4 April 1997); https://doi.org/10.1117/12.270050

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KEYWORDS

Image compression

Distortion

Color difference

Spatial frequencies

Microscopes

Signal to noise ratio

Image resolution

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