1. An image sensing apparatus having an image sensing device which has a color filter including different first, second and third color components, said apparatus comprising:
a reading device which sequentially reads a first field including the first and second color components and a second field including the second and third color components from the image sensing device by interlaced scanning in every one field interval;
a storage device which stores an image signal output from said reading device;
a controller which calculates a white balance coefficient on the basis of an image signal including the first and second color components read in the first field and stored in said storage device and an image signal including the second and third color components read in the second field, in parallel with reading operation of an image signal of the second field and after reading operation of the first field; and
a white balance correction device which executes white balance correction to one frame image signal including the image signals of the first and second fields by using the white balance coefficient after the reading operation of the image signal of the second field from the image sensing device has been finished.
2. The apparatus according to claim 1, further comprising a white balance processing unit which performs white balance processing on the basis of the white balance coefficient as the white balance coefficient is calculated by said controller, and a display device which displays an image that has undergone the white balance processing by said white balance processing unit.
3. The apparatus according to claim 2, wherein said white balance processing unit performs a first white balance processing or a second white balance processing which is different from the first white balance processing,
wherein said display device displays an image that has undergone the first white balance processing in a case that an image is displayed on said display device after an image sensing instruction has been arisen, and said display device displays an image that has undergone the second white balance processing in a case that an image is displayed on said display device before an image sensing instruction is arisen.
4. The apparatus according to claim 1, wherein a control device which controls the image data read operation from said storage so as to end the calculation of the white balance coefficient after an image data write operation of one frame in said storage is ended.
5. The apparatus according to claim 1, wherein a control device controls said reading device to start reading out the image data from said storage after an elapse of at least one field.
6. The apparatus according to claim 1, wherein a control device controls a timing of the image data read from said storage for the calculation of the white balance coefficient so that a read rate of the image data from said storage for the calculation of the white balance coefficient become lower than twice a rate of a read rate of the image data output from said image sensing device.
7. A signal processing method of an image sensing apparatus having an image sensing device which has a color filter including different first, second and third color components, said method comprising the steps of:
sequentially reading a first field including the first and second color components and a second field including the second and third color components from the image sensing device by interlaced scanning in every one field interval;
storing an image signal output in said reading step into a storage device;
calculating a white balance coefficient on the basis of an image signal including the first and second components read in the first field and stored in said storage device and an image signal including the second and third color components read in the second field, in parallel with reading operation of an image signal of the second field and after reading operation of the first field; and
executing white balance correction to one frame image signal including the image signals of the first and second fields by using the white balance coefficient after the reading operation of the image signal of the second field from the image sensing device has been finished.
8. The method according to claim 7, further comprising performing white balance processing on the basis of the white balance coefficient as the white balance coefficient is calculated in said white balance coefficient calculating step, and displaying an image that has undergone the white balance processing in said performing white balance processing step.
9. The method according to claim 8, further comprising displaying an image that has undergone a first white balance processing in a case that an image is displayed after an image sensing instruction has been arisen, and displaying an image that has undergone a second white balance processing which is different from the first white balance processing, in a case that an image is displayed before an image sensing instruction is arisen.
10. The method according to claim 7, wherein the image data read operation from the storage device is so controlled as to end the calculation of the white balance coefficient after image data write operation of one frame in the storage device is ended.
11. The method according to claim 7, wherein reading of the image data from the storage device is started after an elapse of at least one field.
12. The method according to claim 7, wherein a timing of the image data read from the storage device, which temporarily sequentially stores the image data, for the calculation of the white balance coefficient is controlled on the basis of a read rate of the image data from the storage device for the calculation of the white balance coefficient and a read rate of the image data output from the image sensing device.
13. A computer-readable storage medium which stores a program wherein the program causes a computer to execute the signal processing method of claim 7.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An apparatus for positioning a workpiece in a spindle of a machine tool and removing a workpiece therefrom, said spindle having an axis of rotation and said workpiece having a centerline extending between a first end surface and a second end surface, said apparatus comprising:
a mechanism for grasping the workpiece in a position proximate said spindle whereby said centerline is coincident with said axis of rotation,
means to move said spindle relative to said workpiece in the direction of said axis of rotation whereby said workpiece is inserted into said spindle or removed from said spindle,
wherein said mechanism includes a first gripping means for gripping the workpiece at the intersection of the first end surface and the centerline, said first gripping means being positionable between an engaged position and a disengaged position.
2. The apparatus of claim 1 wherein said workpiece is one of a gear or gear blank.
3. The apparatus of claim 1 wherein said first gripping means is located spaced from said spindle.
4. The apparatus of claim 2 wherein said gear or gear blank comprises a pinion having a shank.
5. The apparatus of claim 1 wherein said mechanism includes a second gripping means for gripping the workpiece at the second end surface.
6. The apparatus of claim 5 wherein the second end surface is gripped at the intersection of the second end surface and the centerline.
7. The apparatus of claim 5 wherein said second gripping means is located within said spindle and is positionable therein.
8. The apparatus of claim 1 wherein said machine tool comprises a machine for manufacturing gears.
9. The apparatus of claim 4 wherein the first end surface of said pinion is a front face having a center and the second end surface of said pinion is the end of said shank having a center, the front face center and the shank center defining the centerline.