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US 8,947,550 B2Granted
Image processing apparatus with frame conversion, and method of controlling same
AssigneeCanon Kabushiki Kaisha
InventorYoshihiko Minato
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Abstract
An image processing apparatus according to the present invention, comprises: a frame rate conversion unit that generates an interpolated frame image which interpolates an input frame image constituting an input video, and outputs the input frame image and the interpolated frame image alternately; and an HDR video generation unit that performs processing to enhance gradation of an image in a low brightness area, for the input frame image which is output from the frame rate conversion unit, and performs processing to enhance gradation of an image in a high brightness area, for the interpolated frame image.
Claims18
An image processing apparatus, comprising:
- a frame rate conversion processor that generates an interpolated frame image which interpolates an input frame image constituting an input video, and outputs the input frame image and the interpolated frame image alternately;
- and
- a high dynamic range (HDR) processor that performs processing to increase the brightness of the input frame image which is output from the frame rate conversion processor by converting gradation in use of a lookup table for enhancing gradation in a low brightness area, and performs processing to decrease the brightness of the interpolated frame image which is output from the frame rate conversion processor by converting gradation in use of a lookup table for enhancing gradation in a high brightness area,
- wherein the low brightness area is an area of an image having a lower than or equal to a first predetermined brightness value and the high brightness area is an area of an image having a higher than or equal to a second predetermined brightness value.
1 more element
An image processing apparatus, comprising:
- a frame rate conversion processor that generates an interpolated frame image which interpolates an input frame image constituting an input video, and alternately outputs the input frame image and the interpolated frame image;
- an image processor that extracts high frequency components of the input frame image which is output from the frame rate conversion processor in order to generate a high frequency component image, and extracts low frequency components of the interpolated frame image which is output from the frame rate conversion processor in order to generate a low frequency component image;
- and
- a high dynamic range (HDR) processor that performs processing to decrease the brightness of the high frequency component image which is generated by the image processor, and performs processing to increase the brightness of the low frequency component image which is generated by the image processor.
1 more element
A method for controlling an image processing apparatus, comprising:
- a frame rate conversion step of generating an interpolated frame image which interpolates an input frame image constituting an input video, and alternately outputting the input frame image and the interpolated frame image;
- and
- a processing step of performing processing to increase the brightness of the input frame image which is output in the frame rate conversion step by converting gradation in use of a lookup table for enhancing gradation in a low brightness area, and performing processing to decrease the brightness of the interpolated frame image by converting gradation in use of a lookup table for enhancing gradation in a high brightness area,
- wherein the low brightness area is an area of an image having a lower than or equal to a first predetermined brightness value and the high brightness area is an area of an image having a higher than or equal to a second predetermined brightness value.
1 more element
A method for controlling an image processing apparatus, comprising:
- a frame rate conversion step of generating an interpolated frame image which interpolates an input frame image constituting an input video, and alternately outputting the input frame image and the interpolated frame image;
- a first processing step of extracting high frequency components of the input frame image which is output in the frame rate conversion step in order to generate a high frequency component image, and extracting low frequency components of the interpolated frame image which is output in the frame rate conversion step in order to generate a low frequency component image;
- and
- a second processing step of performing processing to decrease the brightness of the high frequency component image which is generated by the first processing step, and performing processing to increase the brightness of the low frequency component image which is generated by the first processing step.
1 more element
Dependencies are inferred from the claim text.