Image display apparatus

• US 5,959,618 A
• Filed: 08/02/1996
• Issued: 09/28/1999
• Est. Priority Date: 06/01/1993
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Watanabe, Ikuo
• Primary Examiner(s): Liang, Regina
• Application Number:
  US08/691,445
• Time in Patent Office: 1,152 Days
• Field of Search: 345/199, 345/189, 345/113, 345/115, 345/186
• US Class Current: 345/592
• CPC Class Codes: G09G 2340/10 Mixing of images, i.e. displayed pixel being the result of an operation, e.g. adding, on the corresponding input pixels
• CPC Class Codes: G09G 5/395 Arrangements specially adapted for transferring the contents of the bit-mapped memory to the screen G09G5/399 takes precedence
• CPC Class Codes: H04N 5/265 Mixing

Abstract

In an image display apparatus arranged to include a bit mapping memory having transparency parameter values and to display images while importing a picture effect to a plurality of image data on the basis of the transparency parameter values, a code memory is arranged to hold transparency parameter codes, and a look-up table is arranged to be used for converting the transparency parameter codes into the transparency parameter values. The image display apparatus is thus arranged to bring forth the picture effect by converting, through the look-up table, the transparency parameter codes into the transparency parameter values to be used for transparency between a plurality of images.

Claims

1. A data processing apparatus, comprising:

processing means for processing input image data with parameter data;

memory means for storing code data into a plurality of memory areas, each of the plurality of memory areas being provided for a plurality of areas into which one picture of the input image data is divided, the code data having different values between the plurality of memory areas;

generating means for receiving the code data read out from said memory means and outputting the parameter data corresponding to the code data; and

control means for changing values of the parameter data corresponding to the code data in the memory area unit.

2. An apparatus according to claim 1, wherein said image input data include first image data and second image data, said processing means compositing said first image data with said second image data by means of said parameter data.

3. An apparatus according to claim 2, wherein said parameter data represent a ratio of said first image data to said second image data when the first image data are composited with the second image data.

4. An apparatus according to claim 3, wherein said processing means has subtraction means for obtaining difference data between said first image data and said second image data, multiplying means for multiplying the difference data by a coefficient corresponding to the parameter data generated by said generating means and addition means for adding said second image data and an output from said multiplying means.

5. An apparatus according to claim 1, further comprising display means for displaying an image for the image input data which has been processed with said processing means.

6. An apparatus according to claim 1, wherein the values of said parameter data are changed for every vertical blanking period.

7. An apparatus according to claim 1, further comprising reproducing means for reproducing the input image data from a recording medium.

8. An apparatus according to claim 7, wherein said control means also controls a reproduction operation of said reproducing means.

9. A data processing apparatus, comprising:

a multiplexer for multiplexing first image data and second image data by using parameter data;

a memory for storing code data into a plurality of memory areas, each of the plurality of memory areas being provided for a plurality of areas into which one picture is divided, the code data having different values between the plurality of memory areas;

a table circuit for receiving the code data read out from said memory and outputting the parameter data corresponding to the value of the code data; and

a controller for changing values of the parameter data corresponding to the value of the code data in the memory area unit.

10. An apparatus according to claim 9, wherein the values of said parameter data are rewritten for every vertical blanking period.

11. A data processing apparatus, comprising:

processing means for processing input image data with parameter data;

assigning means for dividing one picture of the input image data into a plurality of areas and assigning code data to each of the plurality of areas so that the code data have different values between the plurality of areas;

generating means for receiving the code data assigned by said assigning means and outputting the parameter data corresponding to the value of the code data; and

control means for changing values of the parameter data corresponding to the code data in the area unit.

12. An apparatus according to claim 11, wherein said assigning means has memory means for staring the code data into a plurality of memory areas, each of which is provided for the plurality of areas.

13. An apparatus according to claim 11, wherein said generating means includes a table circuit for receiving the code data assigned by said assigning means and outputting the parameter data corresponding to the value of the code data.

14. An apparatus according to claim 11, further comprising reproducing means for reproducing the input image data from a recording medium.

15. An apparatus according to claim 11, wherein said image data include first image data and second image data, said processing means multiplexing said first image data and said second image data by means of said parameter data.

16. An apparatus according to claim 15, wherein said parameter data represent a ratio of said first image data to said second image data when said first image data are multiplexed with said second image data.

17. An apparatus according to claim 16, wherein said processing means has subtraction means for obtaining difference data between said first image data and said second image data, multiplying means for multiplying the difference data by a coefficient corresponding to the parameter data generated by said generating means and addition means for adding said second image data and an output from said multiplying means.

18. An apparatus according to claim 11, further comprising display means for displaying an image corresponding to the image data processed by said processing means.

19. An apparatus according to claim 11, wherein said processing means applies multiplication process to said input image data by using said parameter.

20. An apparatus according to claim 19, wherein said parameter is used as a coefficient in the multiplication process.

21. An apparatus according to claim 19, wherein said processing means has a memory for memorizing said input image data, and applies multiplication process to said input image data read from said memory.

22. An apparatus according to claim 11, wherein said control means causes values of parameters corresponding to said plural areas to gradually change.

23. A data processing method, comprising:

processing input image data with parameter data;

dividing one picture of the input image data into a plurality of areas and assigning code data to each of the plurality of areas so that the code data have different values between the plurality of areas;

receiving the code data assigned by said assigning step and outputting the parameter data corresponding to the value of the code data; and

changing values of the parameter data corresponding to the code data in the area unit.

24. The method according to claim 23, wherein said image data include first image data and second image data, said processing step including multiplexing said first image data and said second image data by said parameter data.

25. The method according to claim 24, wherein said parameter data represent a ratio of said first image data to said second image data when said first image data are multiplexed with said second image data.

26. The method according to claim 23, further comprising displaying an image corresponding to the image data processed in said processing step.

27. The method of claim 23, wherein said processing step applies multiplication process to said input image data by using said parameter.

28. The method according to claim 27, wherein said parameter is used as a coefficient in the multiplication process.

29. The method according to claim 27, wherein said processing step includes memorizing said input image data, and applies multiplication process to said memorized input image data.

30. The method according to claim 23, wherein said step of changing causes values of parameters corresponding to said plural areas to gradually change.