Image processing device
Color-difference signals that become unnecessary after rotation are deleted from a second pixel while saving color-difference signals that become necessary after rotation in the second pixel, to thereby form image data conforming to YUV422 format. The image data is then rotated, and subsequently the color-difference signals saved in the second pixel are returned to the original first pixel, to thereby form image data conforming to YUV422 format.
1. An image processing device executing image processing that includes a rotation process on a digital image, said image processing device comprising:
a first processing part forming first image data in a first format;
a second processing part forming second image data conforming to a second format based on said first image data; and
a third processing part rotating said second image data to form third image data conforming to said second format based on said second image data, wherein
said first image data includes a first pixel having a first color-difference signal, and a second pixel having a second color-difference signal,
said first color-difference signal is a color-difference signal that is necessary for said third image data, but needs to be deleted from said second pixel for said third image data to conform to said second format,
said second color-difference signal is a color-difference signal that is unnecessary for said third image data,
said second processing part forms said second image data, said second image data being such that said second color-difference signal is deleted from said second pixel, and said first color-difference signal of said first pixel is moved to said second pixel in said first image data, and
said third processing part forms said third image data, said third image data being such that said second image data is rotated, and said first color-difference signal of said second pixel is moved to said first pixel in said second image data.
2. The image processing device according to claim 1 , wherein
said first format is YUV444 format, and
said second format is YUV422 format.
3. An image processing device executing image processing that includes a rotation process on a digital image, said image processing device comprising:
a first processing part forming first image data in a first format;
a second processing part forming second image data conforming to a second format based on said first image data;
a third processing part rotating said second image data to form third image data conforming to said second format based on said second image data; and
a processing part executing a filtering process by using at least one line memory, wherein
said first image data includes a first pixel having a first color-difference signal, and a second pixel having a second color-difference signal,
said first color-difference signal is a color-difference signal that is necessary for said third image data, but needs to be deleted from said second pixel for said third image data to conform to said second format,
said second color-difference signal is a color-difference signal that is unnecessary for said third image data,
said second processing part forms said second image data, said second image data being such that said second color-difference signal is deleted from said second pixel, and said first color-difference signal of said first pixel is moved to said second pixel in said first image data,
said third processing part forms said third image data, said third image data being such that said second image data is rotated, and said first color-difference signal of said second pixel is moved to said first pixel in said second image data,
said second processing part forms said second image data by using a line memory storing row data of said first image data, and
said second processing part uses, as a line memory for forming said second image data, said line memory used for executing said filtering process.
4. The image processing device according to claim 3 , wherein
said first format is YUV444 format, and
said second format is YUV422 format.
5. The image processing device according to claim 3 , wherein
said filtering process is a resizing process.
6. The image processing device according to claim 4 , wherein
said filtering process is a resizing process.