Image Processing Apparatus and Method

1. An image processing apparatus comprising: an encoding mode selector that selects, on a coding unit basis, a non-compression mode being an encoding mode in which image data is output as encoded data; a flag setter that sets a value of a flag to indicate the non-compression mode as the selected mode; an encoder that encodes, on the coding unit basis, the image data and the flag in accordance with the non-compression mode selected by the encoding mode selector; and a controller that controls, on the coding unit basis, encoding in accordance with a bit depth which specifies a number of bits used to represent the image data encoded as the non-compression mode, wherein the coding unit is formed by recursively splitting a largest coding unit into smaller coding units as block partitioning, and wherein a size of the largest coding unit and a size of the smallest coding unit are each specified by a sequence parameter set that is included in image compression information.

2. The image processing apparatus according to claim 1 , wherein the controller further performs control, on the coding unit for which the non-compression mode has been selected by the encoding mode selector, to skip processing of changing a value of the bit depth.

3. The image processing apparatus according to claim 1 , wherein the controller further performs control, on the coding unit for which the non-compression mode has been selected by the encoding mode selector, to select whether to apply or skip filter processing in which filtering is performed on a locally decoded image.

4. The image processing apparatus according to claim 3 , further comprising: a filter identification information generator that generates filter identification information identifying whether the filter processing is to be performed.

5. The image processing apparatus according to claim 1 , wherein, in a case where an amount of input data, which is a data amount of the image data corresponding to the coding unit, is smaller than or equal to an amount of code of encoded data, which is obtained by encoding the image data corresponding to the coding unit, the encoding mode selector selects an encoding mode of the coding unit to be the non-compression mode.

6. The image processing apparatus according to claim 5 , further comprising: an input data amount calculator that calculates the amount of input data, wherein the encoding mode selector compares, regarding the coding unit, the amount of input data calculated by the input data amount calculator with the amount of code.

7. The image processing apparatus according to claim 1 , further comprising: an encoding mode identification information generator that generates encoding mode identification information indicating whether the non-compression mode has been selected by the encoding mode selector.

8. The image processing apparatus according to claim 1 , further comprising: an identification information generator that generates identification information identifying that a block constitute by a plurality of coding units includes a coding unit for which the non-compression mode has been selected.

9. An image processing method comprising: selecting, on a coding unit basis, a non-compression mode being an encoding mode in which the image data is output as encoded data; setting a value of a flag to indicate the non-compression mode as the selected mode: encoding, on the coding unit basis, the image data and the flag in accordance with the selected non-compression mode; and controlling, on the coding unit basis, encoding in accordance with a bit depth which specifies a number of bits used to represent the image data encoded as the non-compression mode, wherein the coding unit is formed by recursively splitting a largest coding unit into smaller coding units as block partitioning, and wherein a size of the largest coding unit and a size of the smallest coding unit are each specified by a sequence parameter set that is included in image compression information.

10. The image processing method according to claim 9 , further comprising: performing a controlling, on the coding unit for which the non-compression mode has been selected, to skip processing of changing a value of the bit depth.

11. The image processing method according to claim 9 , further comprising performing a controlling, on the coding unit for which the non-compression mode has been selected, to select whether to apply or skip filter processing in which filtering is performed on a locally decoded image.

12. The image processing method according to claim 11 , further comprising: generating filter identification information identifying whether the filter processing is to be performed.

13. The image processing method according to claim 9 , wherein, in a case where an amount of input data, which is a data amount of the image data corresponding to the coding unit, is smaller than or equal to an amount of code of encoded data, which is obtained by encoding the image data corresponding to the coding unit, an encoding mode of the coding unit is selected to be the non-compression mode.

14. The image processing method according to claim 13 , further comprising: calculating the amount of input data; and comparing, regarding the coding unit, the amount of input data calculated by the input data amount calculator with the amount of code.

15. The image processing method according to claim 9 , further comprising: generating encoding mode identification information indicating whether the non-compression mode has been selected.

16. The image processing method according to claim 9 , further comprising: generating identification information identifying that a block constitute by a plurality of coding units includes a coding unit for which the non-compression mode has been selected.