System and method for changing orientation of an image in a display device

• US 8,134,577 B2
• Filed: 08/21/2008
• Issued: 03/13/2012
• Est. Priority Date: 09/04/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Nagaraj, Guruprasad, Murthy, Krishna Koteshwara Sridhar
• Primary Examiner(s): Johnson, M Good
• Application Number:
  US12/195,972
• Publication Number:
  US 20090073193A1
• Time in Patent Office: 1,300 Days
• Field of Search: 345/659, 345/538, 345/649
• US Class Current: 345/649
• CPC Class Codes: G06F 16/9577 Optimising the visualization of content, e.g. distillation of HTML documents
• CPC Class Codes: G06T 1/60 Memory management

Abstract

A method for displaying an image in a display device initially includes storing a plurality masks in a memory. A mask of the plurality of masks is selected randomly from the plurality of masks, when control information is received for a source image and used to change the orientation of the source image. Each mask controls the transfer of image lines in a different non-sequential order based on the control information.

Claims

1. A method for displaying an image in a display device, comprising:

selecting a mask;

receiving control information for a source image; and

changing an orientation of the source image using the mask,

wherein the mask includes a plurality of constant values that control transfer of image lines in the source image to a display memory, the constant values arranged within the mask to cause the image lines to be transferred in a non-sequential order based on the control information, wherein each constant value controls transfer of a different one of the image lines in the source image to the display memory.

2. The method of claim 1, wherein said changing includes:

transferring image lines in the source image to the display memory in said non-sequential order based on the constant values in the mask.

3. The method of claim 2, wherein said transferring includes:

applying an index variable to the mask to transfer a first group of image lines in the source image to the display memory; and

incrementing the index variable by a size of the mask to transfer remaining groups of image lines in the source image to the display memory.

4. The method of claim 3, wherein after transfer of remaining groups of image lines and if there are remaining image lines less than the size of mask, the remaining image lines are transferred sequentially to the display memory.

5. The method of claim 3, wherein each of the plurality of masks has a different order of constant values that control transfer of image lines in the source image in a different non-sequential order.

6. The method of claim 5, wherein each mask has a same number of constant values.

7. The method of claim 5, wherein each mask has the same constant values arranged in a different order.

8. The method of claim 5, wherein a number of constant values in the mask controls a number of image lines in the source image that are transferred in each iteration of the index variable.

9. The method of claim 5, wherein said incrementing includes:

incrementing the index variable with a size of mask,

wherein the size of mask is set based on the plurality of values in the mask.

10. The method of claim 1, wherein the control information includes an angle of rotation for the source image.

11. The method of claim 1, further comprising:

displaying the changed orientation of the source image based on the transfer of image lines into the display memory.

12. A system for displaying an image in a display device, comprising:

a computer readable medium to store at least one mask; and

a processor to change an orientation of a source image using the mask,

wherein the mask includes a plurality of constant values that control transfer of image lines in the source image to a display memory, the constant values arranged within the mask to cause the image lines to be transferred in a non-sequential order based on control information, and wherein each constant value controls transfer of a different one of the image lines in the source image to the display memory.

13. The system of claim 12, wherein the processor transfers image lines in the source image to the display memory in said non-sequential order based on the constant values in the mask.

14. The system of claim 13, wherein the processor:

generates a random number;

selects the mask from a plurality of masks stored in said memory based on the random number;

applies an index variable to the mask to transfer a first group of image lines in the source image to the display memory; and

increments the index variable by a size of mask to transfer remaining groups of image lines in the source image to the display memory, wherein the size of mask is set based on the plurality of values in the mask.

15. The system of claim 14, wherein after the transfer of remaining groups of image lines and if there are remaining image lines less than the size of mask, the remaining image lines are transferred sequentially to the display memory.

16. The system of claim 14, wherein each of the plurality of masks has a different order of constant values that control transfer of image lines in the source image in a different non-sequential order.

17. The system of claim 16, wherein each mask has a same number of constant values.

18. The system of claim 16, wherein each mask has the same constant values arranged in a different order.

19. The system of claim 16, wherein a number of constant values in the mask controls a number of image lines in the source image that are transferred in each iteration of the index variable.

20. The system of claim 16, wherein said incrementing includes:

incrementing the index variable with a size of mask,

wherein the size of mask is set based on the plurality of values in the mask.

21. The system of claim 12, wherein the control information includes an angle of rotation for the source image.

22. The system of claim 12, wherein the processor controls display of the changed orientation of the source image based on the transfer of image lines into the display memory.

23. A method for displaying an image in a display device, comprising:

randomly selecting one of a plurality of the masks stored in a memory;

receiving control information for a source image; and

changing an orientation of the source image using the selected mask,

wherein the mask is used to transfer image lines in the source image to a display memory in a non-sequential order based on the control information.

24. The method of claim 23, wherein:

each of the masks includes a plurality of constant values,

image lines in the source image are transferred to the display memory in said non-sequential order based on the constant values in the selected mask, and

each constant value in the selected mask controls transfer of a different one of the image lines in the source image to the display memory.

25. The method of claim 24, wherein each of the plurality of masks has a different order of the same constant values that control transfer of image lines in the source image in a different non-sequential order.

26. The method of claim 24, wherein each mask has a same number of constant values.

27. The method of claim 24, wherein image lines in the source image are transferred by:

applying an index variable to the selected mask to transfer a first group of lines in the source image to the display memory; and

incrementing the index variable by a size of mask to transfer remaining groups of lines in the source image to the display memory, wherein the size of mask is set based on the plurality of values in the mask.

28. The method of claim 27, wherein after the transfer of remaining groups of lines and if there are remaining image lines of less than the size of the mask, the remaining image lines are transferred sequentially to the display memory.

29. The method of claim 27, wherein a number of constant values in the selected mask controls a number of lines in the source image that are transferred in each iteration of the index variable.

30. The method of claim 27, wherein said incrementing includes:

incrementing the index variable with the size of (mask).

31. The method of claim 23, further comprising:

displaying the changed orientation of the source image based on the transfer of source image lines into the display memory.

32. A computer-implemented method for transferring image information from a source memory to a display memory for presentation on a computer display, the image information comprising a plurality of image lines, each image line comprising a plurality of pixels, the transfer causing an image to be presented on the computer display conforming in orientation to one of a plurality of selectable orientations with respect to the computer display, the method comprising:

determining one of the plurality of selectable orientations as the selected orientation;

calculating a first increment parameter from the selected orientation; and

selecting image lines in the source memory in a non-sequential order,

for each image line;

stepping seriatim through each pixel of the image line,

for each pixel;

transferring the value of that pixel to a display memory location indicated by a display memory pointer;

updating the display memory pointer after each pixel transfer by adding the first increment parameter to the display memory pointer; and

updating the display memory pointer after each image line by adding different increment parameters to the display memory pointer to transfer image lines in the source memory in said non-sequential order.

33. The method of claim 32, wherein the non-sequential transfer order of image lines is determined randomly based on a selection of one of a plurality of masks, each mask including constant values that control a different non-sequential transfer order of the image lines in the source memory.