1. An X-ray imaging apparatus comprising:
an X-ray emitter that emits X-rays to an object at a plurality of positions;
a detector that detects X-rays having passed through the object and converts the detected X-rays into electric signals; and
an image processor that is configured to generate X-ray images at the plurality of positions by reading out the electric signals, acquire volume data of the object using the X-ray images, and reproject the acquired volume data by using different bands of energy spectrums to acquire reconstructed reprojection images of different energy bands.
2. The apparatus according to claim 1, wherein the image processor generates a multi-energy X-ray (MEX) image using the acquired reprojection images.
3. The apparatus according to claim 2, wherein the image processor generates the MEX image having an enhanced contrast between materials inside the object by using the reprojection images of the different energy bands.
4. The apparatus according to claim 3, wherein the image processor acquires the reprojection images captured at different positions by reprojecting the acquired volume data at the different positions.
5. The apparatus according to claim 4, wherein the image processor controls a generation of a stereoscopic image or a display of a stereoscopic image based on at least two reprojection images of the reprojection images captured at the different positions.
6. The apparatus according to claim 1, wherein the image processor reprojects the acquired volume data at different positions to acquire the reprojection images captured at the different positions, and controls a generation of a stereoscopic image or a display of a stereoscopic image based on at least two reprojection images of the reprojection images captured at the different positions.
7. The apparatus according to claim 6, wherein the image processor generates at least one multi-energy X-ray (MEX) image by using the acquired reprojection images.
8. The apparatus according to claim 7, wherein the image processor generates the MEX image having an enhanced contrast between materials inside the object by using the reprojection images of the different energy bands.
9. An X-ray image generation method comprising:
emitting X-rays to an object at a plurality of positions a plurality of times;
detecting X-rays having passed through the object and converting the detected X-rays, emitted the plurality of times, into electric signals;
generating X-ray images by reading out respective electric signals;
calculating volume data of the object by using the X-ray images;
reprojecting the volume data by using different bands of energy spectrums; and
acquiring reprojection images of different energy bands.
10. The method according to claim 9, further comprising generating a multi-energy X-ray (MEX) image by using the acquired reprojection images.
11. The method according to claim 10, wherein the generating the MEX image includes generating the MEX image having an enhanced contrast between materials inside the object by using the acquired reprojection images.
12. The method according to claim 9, wherein the reprojecting includes reprojecting the volume data at different positions by using the different bands of energy spectrums, and
the acquiring the reprojection images includes acquiring the reprojection images that are reconstructed on a per energy band basis and captured at the different positions.
13. The method according to claim 12, further comprising generating or displaying a stereoscopic image based on at least two reprojection images of the reprojection images captured at the different positions.
14. An X-ray imaging apparatus comprising:
an X-ray emitter that emits X-rays to an object at a plurality of positions;
a detector that detects X-rays having passed through the object and converts the detected X-rays into electric signals; and
an image processor that is configured to generate X-ray images of the object at the plurality of positions by reading out the electric signals, generate a virtual object from volume data of the object calculated by using the X-ray images of the object, and acquire virtual X-ray images of the virtual object of different energy bands by virtually emitting X-rays having different bands of energy spectrums to the generated virtual object.
15. The apparatus according to claim 14, wherein the image processor generates a multi-energy X-ray (MEX) image of the virtual object by using the acquired virtual X-ray images.
16. The apparatus according to claim 14, wherein the image processor acquires the virtual X-ray images captured at different positions by virtually emitting X-rays having the different bands of energy spectrums to the virtual object at the different positions.
17. The apparatus according to claim 16, wherein the image processor controls a generation of a stereoscopic image or a display of a stereoscopic image based on at least two virtual X-ray images of the virtual X-ray images captured at the different positions.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. An image processing method of generating conversion data, which is used in conversion between data on a device-dependent color space and data on a device-independent color space, from a calorimetric value, comprising steps of:
acquiring media white and black points;
calculating a gray-balance black points from the media white and black points;
converting the calorimetric value using the media white point and the gray-balance black point; and
calculating the conversion data using the converted calorimetric value to perform gray-balance correction,
wherein the gray-balance black point is calculated by changing lightness of the media white point to lightness of the media black point.
2. The method according to claim 1, further comprising the step of providing a user interface for setting the gray-balance correction to ON or OFF.
3. The method according to claim 1, further comprising the step of providing a user interface used to select a type of conversion model used in the gray-balance correction, and
wherein the conversion model includes a chromatic adaptation model and color perception model.
4. The method according to claim 1, further comprising the steps of:
converting thee calorimetric value using the media white and black points to perform media-black point correction; and
providing a user interface used to select an output of the media-black point correction and the gray-balance correction to provide the converted calorimetric value to the calculation of the conversion data.
5. An image processing method comprising steps of:
converting color data dependent on a source-side device to color data in a device-independent color space;
correcting the converted color data on the basis of a media white point and gray-balance black point on the source side, and a media white point and gray-balance black point on the destination side to perform gray-balance correction; and
converting the corrected color data to color data dependent on a destination-side device,
wherein the gray-balance black point on the source side is calculated from the media white point and gray-balance black point on the source side, and
the gray-balance black point on the destination side is calculated from the media white point and gray-balance black point on the destination side.
6. The method according to claim 5, wherein the gray-balance black point is calculated by changing lightness of the media white point to lightness of a media black point.
7. The method according to claim 5, further comprising the step of providing a user interface for setting the gray-balance correction to ON or OFF.
8. The method according to claim 5, further comprising the step of providing a user interface used to select a type of conversion model used in the gray-balance correction, and
wherein the conversion model includes a chromatic adaptation model and color perception model.
9. The method according to claim 5, further comprising the steps of:
correcting the converted color data on the basis of the media white point and a media black point on the source side, and the media white point and a media black point on the destination side to perform media-black point correction; and
providing a user interface used to select an output of the media black point correction and the gray-balance correction to provide the corrected color data to the conversion for obtaining the color data dependent on a destination-side device.
10. A computer program product storing a computer readable media comprising a computer program code for a color processing method of generating conversion data, which is used in conversion between data on a device-dependent color space and data on a device-independent color space, from a calorimetric value, the method comprising the steps of:
acquiring media white and black points;
calculating a gray-balance black points from the media white and black points;
converting the calorimetric value using the media white point and the gray-balance black point; and
calculating the conversion data using the converted calorimetric value to perform gray-balance correction, wherein the gray-balance black point is calculated by changing lightness of the media white point to lightness of the media black point.
11. A computer program product storing a computer readable media comprising a computer program code for an image processing method, the method comprising the steps of:
converting color data dependent on a source-side device to color data in a device-independent color space;
correcting the converted color data on the basis of a media white point and gray-balance black point on the source side, and a media white point and gray-balance black point on the destination side to perform gray-balance correction; and
converting the corrected color data to color data dependent on a destination-side device,
wherein the gray-balance black point on the source side is calculated from the media white point and gray-balance black point on the source side, and
the gray-balance black point on the destination side is calculated from the media white point and gray-balance black point on the destination side.
12. A color processing apparatus for generating conversion data, which is used in conversion between data on a device-dependent color space and data on a device-independent color space, from a calorimetric value, comprising:
an acquisition section, arranged to acquire media white and black points;
a first calculator, arranged to calculate a gray-balance black points from the media white and black points;
a converter, arranged to convert the calorimetric value using the media white point and the gray-balance black point; and
a second calculator, arranged to calculate the conversion data using the converted calorimetric value to perform gray-balance correction,
wherein the gray-balance black point is calculated by changing lightness of the media white point to lightness of the media black point.
13. An image processing apparatus comprising:
a first converter, arranged to convert color data dependent on a source-side device to color data in a device-independent color space;
a corrector, arranged to correct the converted color data on the basis of a media white point and gray-balance black point on the source side, and a media white point and gray-balance black point on the destination side to perform gray-balance correction; and
a second converter, arranged to convert the corrected color data to color data dependent on a destination-side device,
wherein the gray-balance black point on the source side is calculated from the media white point and gray-balance black point on the source side, and
the gray-balance black point on the destination side is calculated from the media white point and gray-balance black point on the destination side.