Patent EP0183539A2 successfully refreshed from Google Patents.
EP0183539A2
Expired / Lapsed
EP
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Colour graphics data processing apparatus
Assignee: Sony Corp
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Filing: 1985-11-27
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Granted: —
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Expires: 2005-11-27
Abstract
Abstract Apparatus for processing colour graphics data converts an analog video information signal to a digital signal and stores one frame of the digital video signal corresponding to a desired still picture for display on a video monitor/receiver (4) upon being read out from the store (32). The still picture read out from the store (32) is also fed to a microcomputer (1) in which a colour picture corresponding to the displayed still picture is stored in a memory (13) so that it may be displayed on the monitor (4) and visually compared with the original picture. The data processing apparatus specifies a movable portion of the displayed picture, and the appearance frequencies of respective colours in a plurality of picture elements contained within that specified portion are counted. These appearance frequencies are used to generate a limited number of colours in a colour palette (17). When defining the colours of the colour palette (17) the data in the microcomputer memory (13) are converted to a computer graphics bit length and read out through the colour palette (17) for display on the monitor (4).
Inventors
- 👤 Masaaki C/O Patents Division Hoshino
- 👤 Itaru C/O Patents Division Kawakami
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 15:20
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/62; H04N1/622; H04N1/64; H04N1/644; H04N1/648
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
222 words
Colour graphics data processing apparatus for use in displaying a colour picture based on an input analog colour video signal, the apparatus being characterised by: an analog-to-digital converter (31) for converting an input analog colour video signal to a digital colour video signal; original picture memory means (32) tor storing a plurality of colour picture elements constituting a one-picture portion ot said digital colour video signal from said analog-to-digital converter (31); means (1) for sequentially reading out from said original picture memory means (32) respective picture elements of said digital colour video signal and for counting frequencies of appearance ot each colour of colour data ot said plurality of picture elements; colour determining means (1) responsive to the frequencies of appearance of said colour data for selecting a predetermined number of colours having relatively higher frequencies of appearance; video converting and memory means (13) responsive to said colour determining means (1) for sequentially colour converting and storing said colour data of said digital colour video signal from said original picture memory means (32); a colour palette (17) for producing a predetermined number of display colours in response to said converted colour data read out from said video converting and memory means (13); and video display means (4) for receiving said display colours from said colour palette (17) for displaying said colour picture.
Claim 2
Dependent Claim
222 words
Colour graphics data processing apparatus for use in displaying a colour picture based on an input analog colour video signal, the apparatus being characterised by: an analog-to-digital converter (31) for converting an input analog colour video signal to a digital colour video signal; original picture memory means (32) tor storing a plurality of colour picture elements constituting a one-picture portion ot said digital colour video signal from said analog-to-digital converter (31); means (1) for sequentially reading out from said original picture memory means (32) respective picture elements of said digital colour video signal and for counting frequencies of appearance ot each colour of colour data ot said plurality of picture elements; colour determining means (1) responsive to the frequencies of appearance of said colour data for selecting a predetermined number of colours having relatively higher frequencies of appearance; video converting and memory means (13) responsive to said colour determining means (1) for sequentially colour converting and storing said colour data of said digital colour video signal from said original picture memory means (32); a colour palette (17) for producing a predetermined number of display colours in response to said converted colour data read out from said video converting and memory means (13); and video display means (4) for receiving said display colours from said colour palette (17) for displaying said colour picture.
Claim 3
Dependent Claim
66 words
Apparatus according to claim 1 further comprising cursor generating means (1) for selecting a predetermined portion ot a video screen of said video display means (4), and in which said means (1) for sequentially reading out and counting is arranged to count colour data of picture elements of a picture on said display means (4) in said predetermined portion selected by said cursor generating means (1).
Claim 4
Dependent Claim
21 words
Apparatus according to claim 2 wherein said cursor generating means (1) generates a rectangularly shaped cursor (37) forming said predetermined portion.
Claim 5
Dependent Claim
34 words
Apparatus according to claim 2 wherein said means (1) for sequentially reading out and for counting counts appearing frequencies of colour data by accumulating picture elements within said area determined by said cursor (37).
Claim 6
Dependent Claim
20 words
Apparatus according to claim 1 wherein the colour data of said digital colour video signal is formed of eight bits.
Claim 7
Dependent Claim
31 words
Apparatus according to claim 5 wherein 8-bit colour data is formed having three bits assigned to red colour, three bits assigned to green colour, and two bits assigned to blue colour.
Claim 8
Dependent Claim
19 words
Apparatus according to claim 1 wherein each display colour of said colour palette (17) is formed of sixteen bits.
Claim 9
Dependent Claim
20 words
Apparatus according to claim 1 wherein said colour palette (17) is capable of producing sixteen display colours from 4096 colours.
Claim 10
Dependent Claim
22 words
Apparatus according to claim 1 wherein said colour determining means (1) is arranged to select sixteen colours having higher frequencies of appearance.
Claim 11
Dependent Claim
15 words
Apparatus according to claim 9 wherein said sixteen colours are each formed of four bits.
Claim 12
Dependent Claim
23 words
Apparatus according to claim 1 further comprising display inhibiting means for inhibiting the display of a colour specified by said display inhibiting means.
Claim 13
Dependent Claim
38 words
Apparatus according to claim 13 wherein said display inhibiting means includes a warm colour table and a cool colour table, whereby said colour picture can be displayed only by selected ones of said warm colour or cool colour.
Claim 14
Dependent Claim
22 words
Apparatus according to claim 1 further comprising an external memory (5) for storing said colour data of said digital colour video signal.
Claim 15
Dependent Claim
17 words
Apparatus according to claim 13 wherein said external memory (5) comprises a floppy disc magnetic memory (5).
Claim 16
Independent Claim
147 words
A method of processing computer graphics data and displaying a colour picture based on an input analog colour video signal, the method being characterised by the steps of: digitally converting the analog colour video signal into a digital colour video signal; storing a selected single picture portion formed of a plurality of picture elements of said digital colour video signal; sequentially reading out colour data of respective picture elements of said stored digital colour video signal; counting the number of appearances of each colour of the colour data of said picture elements; selecting a predetermined number of colours having a relatively higher number of appearances; sequentially colour converting and storing said colour data of said digital colour video signal that was previously stored; producing a limited number of colour palette colours from said converted colour data; and displaying said colour picture based on said colour palette colours.
Claim 17
Independent Claim
147 words
A method of processing computer graphics data and displaying a colour picture based on an input analog colour video signal, the method being characterised by the steps of: digitally converting the analog colour video signal into a digital colour video signal; storing a selected single picture portion formed of a plurality of picture elements of said digital colour video signal; sequentially reading out colour data of respective picture elements of said stored digital colour video signal; counting the number of appearances of each colour of the colour data of said picture elements; selecting a predetermined number of colours having a relatively higher number of appearances; sequentially colour converting and storing said colour data of said digital colour video signal that was previously stored; producing a limited number of colour palette colours from said converted colour data; and displaying said colour picture based on said colour palette colours.
Claim 18
Dependent Claim
48 words
A method according to claim 15 further comprising generating a cursor (37) for selecting a predetermined area on a video screen of a displayed picture, and in which said step of counting includes counting colour data of picture elements within a predetermined area selected by said cursor (37).
Claim 19
Dependent Claim
12 words
A method according to claim 16 wherein said cursor (37) is rectangular.
Claim 20
Dependent Claim
27 words
A method according to claim 16 wherein said step of counting includes counting numbers of appearances of colour data by accumulating picture elements within said cursor (37).
Claim 21
Dependent Claim
27 words
A method according to claim 18 wherein said step of counting further includes repeatedly counting and accumulating the colour data of picture elements within said cursor (37).
Claim 22
Dependent Claim
41 words
A method according to claim 15 further comprising the step of forming the colour data of said digital colour video signal having three bits assigned to red colour, three bits assigned to green colour, and two bits assigned to blue colour.
References Cited (Backward Citations)
No citation records indexed.
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