Claims
- 1. An image information processor for generating display data which is applied to a display to produce an image composed of a succession of frames, each frame containing an array of picture elements, or pixels, the display data for each pixel being composed of L image display bits, where L is a natural number equal to or greater than 2, and for causing the image to present pseudo representations of gradations represented by P image data bits, where P is a natural number greater than L, said image information processor comprising:
- (a) processing means for generating (L+1)-bit image display data from the P-bit source image data;
- (b) means for generating a control signal in response to predetermined information; and
- (c) information generation means being responsive to said control signal for executing or suppressing addition of the least significant bit of said (L+1)-bit image display data and at least high-order bits of said (L+1)-bit image display data and generating L-bit image display data.
- 2. The image information processor as claimed in claim 1 wherein said signal generation means generates a control signal alternated for each frame in response to a frame synchronizing signal and said information generation means executes and suppresses the addition alternately for each frame.
- 3. The image information processor as claimed in claim 1 wherein said signal generation means generates a control signal alternated for each dot, each line, and each frame in response to a frame synchronizing signal, a horizontal synchronizing signal, and a dot synchronizing signal and said information generation means executes and suppresses the addition alternately for each dot, each line, and each frame.
- 4. The image information processor as claimed in claim 1 wherein said processing means adds low-order P-(L+1) bits of the P-bit image data of one pixel of an image frame, as error data, to image data of pixels peripheral to the one pixel in the same image frame.
- 5. An image information processor for generating display data which is applied to a display to produce an image composed of a succession of frames, each frame containing an array of picture elements, or pixels, the display data for each pixel being composed of L image display bits, where L is a natural number equal to or greater than 2, and for causing the image to present pseudo representations of gradations represented by P image data bits, where P is a natural number treater than L, said image information processor comprising:
- (a) means for calculating a difference between first and second source image data pieces in a frame;
- (b) comparison means for determining whether or not said difference exceeds a predetermined value;
- (c) information generation means, if said difference does not exceed the predetermined value, for adding a first error data piece which is an error between the first source image data and a first image display data corresponding to a first picture element to the second source image data corresponding to a second picture element contiguous to the first picture element, and if said difference exceeds the predetermined value, for suppressing the addition; and
- (d) information selection means for outputting high-order L bits of P-bit data output from said information generation means as image display data of the second picture element and at least one bit of the remaining ((P-L) bits as a second error data piece.
- 6. An image information processor for generating display data which is applied to a display to produce an image composed of a succession of frames, each frame containing an array of picture elements, or pixels, the display data for each pixel being composed of L image display bits, where L is a natural number equal to or greater than 2, and for causing the image to present pseudo representations of gradations represented by P image data bits, where P is a natural number greater than L, said image information processor comprising:
- (a) first operational means for adding internal image process data and source image data to generate (P-L) -bit error data and L-bit image display data for outputting;
- (b) first storage means for holding the (P-L)-bit error data for a period of one line for outputting as error data of picture element of the immediately preceding line;
- (c) second storage means for holding the (P-L) -bit error data for a period of one picture element for outputting as error data of the immediately preceding picture element; and
- (d) second operational means for outputting to said first operational means said internal image process data which is high-order (P-L) bits of (P-L+1)-bit data provided by adding the (P-L)-bit error data of the picture element of the immediately preceding line and the (P-L)-bit error data of the immediately preceding picture element.
- 7. An image information processor for generating display data which is applied to a display to produce an image composed of a succession of frames, each frame containing an array of picture elements, or pixels, the display data for each pixel being composed of L image display bits, where L is a natural number equal to or treater than 2, and for causing the image to present pseudo representations of gradations represented by P image data bits, where P is a natural number greater than L, said image information processor comprising:
- (a) inframe processing means for processing the P-bit source image data in a frame and generating Q-bit internal image process data, Q being less than P; and
- (b) interframe processing means for processing said internal image process data among a plurality of frames and generating the L-bit image display data.
- 8. The image information processor as claimed in claim 7 wherein said interframe processing means includes:
- means for adding Q-bit internal image process data of a picture element of an Nth frame and error data corresponding to a picture element of an (N-1)st frame at the same position as the picture element of the Nth frame, when N is assumed to be a natural number of 2 or greater; and
- information selection means for outputting high-order L bits of Q-bit data output from said addition means as image display data and at least one bit of the remaining low-order bits as error data of the Nth frame.
- 9. The image information processor as claimed in claim 7 wherein a plurality of said interframe processing means are provided, further including:
- means for selectively outputting the internal image process data from said interframe processing means to any of said plurality of interframe processing means.
- 10. The image information processor as claimed in claim 7 wherein said inframe processing means adds low-order R bits (where R is a natural number of 2 or greater) of nth error data (where n is a natural number) of (P-L) bits which is an error between nth source image data corresponding to an nth picture element in an (N-1)st frame (where N is a natural number of 2 or greater) and image display data of the nth picture element to (n+1)st source image data corresponding to an (n+1)st picture element contiguous to the nth picture element and said interframe processing means adds Nth source image data corresponding to an Nth picture element which is a picture element of an Nth frame at the same position as the nth picture element and high-order (P-L-R) bits of the nth error data and outputs high-order L bits of P-bit data resulting from the addition as Nth image display data corresponding to the Nth picture element and the remaining low-order (P-L) bits as Nth error data corresponding to the Nth picture element.
Priority Claims (10)
Number |
Date |
Country |
Kind |
HEI 5-262174 |
Sep 1992 |
JPX |
|
HEI 4-262175 |
Sep 1992 |
JPX |
|
HEI 4-264873 |
Oct 1992 |
JPX |
|
HEI 4-286054 |
Oct 1992 |
JPX |
|
HEI 4-286055 |
Oct 1992 |
JPX |
|
HEI 4-307210 |
Nov 1992 |
JPX |
|
HEI 4-307211 |
Nov 1992 |
JPX |
|
HEI 4-308856 |
Nov 1992 |
JPX |
|
HEI 4-316751 |
Nov 1992 |
JPX |
|
HEI 5-28155 |
Feb 1993 |
JPX |
|
Parent Case Info
This is a division of application Ser. No. 08/128,476, filed on Sep. 28, 1993 now U.S. Pat. No. 5,596,349.
US Referenced Citations (8)
Non-Patent Literature Citations (3)
Entry |
Floyd et al, 43: An Adaptive Algorithm for Spatial Grey Scale, SID 75 Digest (1975). |
Hirose et al, 32.2: 5-bit TV Pictures on 3-bit Color TFT LCDs Using Alternating Dither, SID 92 Digest (1992). |
Kobayashi et al, P-8: Multi-Gay0Level Method for TFT-LCD Using Enhanced Error Diffusin, SID 93 Digest (1993). |
Divisions (1)
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Number |
Date |
Country |
Parent |
128476 |
Sep 1993 |
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