Method of compressing endoscope image data based on image characteristics

• US 5,379,757 A
• Filed: 11/30/1992
• Issued: 01/10/1995
• Est. Priority Date: 08/28/1990
• Status: Expired due to Term

• Current Assignee: Olympus Optical Corporation Limited (Olympus Corporation)
• Original Assignee: Olympus Optical Corporation Limited (Olympus Corporation)
• Inventors: Hattori, Shinichiro, Nakamura, Kazunari, Tsuruoka, Takao, Hiyama, Keiichi, Konomura, Yutaka, Kanno, Masahide
• Primary Examiner(s): Apley, Richard J.
• Assistant Examiner(s): Leubecker, John P.
• Application Number:
  US07/983,237
• Time in Patent Office: 771 Days
• Field of Search: 128/6, 348/65, 348/76, 348/390, 348/393, 348/397, 348/399, 348/222, 382/6, 382/56, 364/413.15
• US Class Current: 600/109
• CPC Class Codes: H04N 11/042 Codec means
• CPC Class Codes: H04N 19/154 Measured or subjectively estimated visual quality after decoding, e.g. measurement of distortion use of rate-distortion criteria H04N19/147
• CPC Class Codes: H04N 19/30 using hierarchical techniques, e.g. scalability H04N19/63 takes precedence
• CPC Class Codes: H04N 19/60 using transform coding
• CPC Class Codes: H04N 19/80 Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation H04N19/635, H04N19/86 take precedence
• CPC Class Codes: H04N 19/98 Adaptive-dynamic-range coding [ADRC]
• CPC Class Codes: H04N 5/781 on disks or drums
• CPC Class Codes: H04N 5/782 on tape
• CPC Class Codes: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
• CPC Class Codes: H04N 9/8045 using predictive coding

Abstract

An endoscope image data compressing apparatus comprises a plurality of image compressing apparatus not equivalent to each other for compressing input endoscope image data and outputting the compressed data and a selecting apparatus for selecting the compressed data output from at least one of the image compressing apparatus. The selecting apparatus selects the compressing method in response to the kind of the endoscope, characteristic of the image, picture quality of the compressed image, recording time intervals and others.

A method for compressing endoscope image data is realized by an image compressing apparatus capable of compressing image data at different compressing rates. The endoscope image data is determined to be either ordinary image data or dyed image data and, based on this determination, is compressed at different rates. The compressing rate for dyed image data is lowered below the rate for ordinary image data.

Claims

1. A method of compressing input endoscope image data comprising the steps of:

analyzing whether said endoscope image data are ordinary image data or dyed image data; and

varying the compressing manner by lowering the compressing rate for said dyed image data below the compressing rate for said ordinary image data on the basis of the result of said analyzing step.