TW248629B - Color space conversion method - Google Patents

Color space conversion method

Info

Publication number
TW248629B
TW248629B TW82111201A TW82111201A TW248629B TW 248629 B TW248629 B TW 248629B TW 82111201 A TW82111201 A TW 82111201A TW 82111201 A TW82111201 A TW 82111201A TW 248629 B TW248629 B TW 248629B
Authority
TW
Taiwan
Prior art keywords
space
pim
color
component
cnm
Prior art date
Application number
TW82111201A
Other languages
Chinese (zh)
Inventor
Rong-Fuh Shyu
Original Assignee
Winbond Electronics Corp
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 Winbond Electronics Corp filed Critical Winbond Electronics Corp
Priority to TW82111201A priority Critical patent/TW248629B/en
Application granted granted Critical
Publication of TW248629B publication Critical patent/TW248629B/en

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  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

A color space conversion method with symmetric coding, which could implement the conversion between the natural color space R, G, B and luminance/chrominance space Y, Cb, Cr, includes: 1. supplying a equation: 3 POn=sum(Cnm(PIm-128))+128, n=1, 2, 3 m=1 in which m = 1 the color space constituted by PIm is called original space, i.e., PIm is one color component of original space; the color space constituted by POn is called converted space, i.e., POn is color component of original space; Cnm is the coefficient of the n-th color of converted space with respect to the m-th color of original space; 2. when PO1, PO2, PO3 individually represent Y, Cb, Cr component of YCbCr space, PI1, PI2, PI3 individually represent R, G, B component of RGB space; 3. when PO1, PO2, PO3 individually represent R, G, B component of RGB space, PI1, PI2, PI3 individually represent Y, Cb, Cr component of YCbCr space; 4. making each color component PIm of original space represent odd function symmetric distribution with constant 128 as center in conversion relationship; 5. coding PIm with 2's complement based on the multiplication of |PIm-128| and corresponding coefficient Cnm except 128(forcing its value to 0 when output); 6. mapping the symmetric PIm value to same coding address, remaining 0 to its coding address, 128 to the same address with 0; 7. when output, recovering the polarity of Cnm(PIm-128) with respect to Cnm|PIm-128|, conducting polarity reverting if PIm < 128, maintaining same polarity if PIm > 128, forcing output 0 value if PIm = 128.
TW82111201A 1993-12-30 1993-12-30 Color space conversion method TW248629B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW82111201A TW248629B (en) 1993-12-30 1993-12-30 Color space conversion method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW82111201A TW248629B (en) 1993-12-30 1993-12-30 Color space conversion method

Publications (1)

Publication Number Publication Date
TW248629B true TW248629B (en) 1995-06-01

Family

ID=51401231

Family Applications (1)

Application Number Title Priority Date Filing Date
TW82111201A TW248629B (en) 1993-12-30 1993-12-30 Color space conversion method

Country Status (1)

Country Link
TW (1) TW248629B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI697873B (en) * 2018-08-01 2020-07-01 大陸商深圳朗田畝半導體科技有限公司 Image saturation adjusting method and device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI697873B (en) * 2018-08-01 2020-07-01 大陸商深圳朗田畝半導體科技有限公司 Image saturation adjusting method and device

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