1. A flashlight comprising:
a housing for receiving a battery;
a first light supported by the housing, the first light configured to emit light in a first direction;
a second light supported by the housing, the second light configured to emit light in a second direction that is non-parallel with the first direction; and
an actuation switch configured to selectively powering the first light and the second light with the battery received in the housing.
2. The flashlight of claim 1, wherein the second direction is oblique to the first direction.
3. The flashlight of claim 1, wherein the second direction is angled at between zero and 180 degrees, exclusive, to the first direction.
4. The flashlight of claim 3, wherein the second direction is angled at 45 degrees to the first direction.
5. The flashlight of claim 3, wherein the first direction extends along a longitudinal dimension of the housing.
6. The flashlight of claim 3, wherein the first direction is substantially parallel to ground level.
7. The flashlight of claim 3,
wherein the second direction is a forward direction from the housing; and
wherein the first direction is a downward direction.
8. The flashlight of claim 1, wherein at least one of the first light and the second light comprises one or more light emitting diodes.
9. The flashlight of claim 1, wherein the second light comprises a plurality of lights.
10. The flashlight of claim 1, wherein the second light is arranged to face in the second direction.
11. The flashlight of claim 1, wherein the actuation switch is configured for selecting a mode of operation for the flashlight.
12. The flashlight of claim 11,
wherein in a first mode each of the first light and the second light emit light; and
wherein in a second mode only one of the first light and the second light emit light.
13. The flashlight of claim 11, wherein the actuation switch is arranged above the first light and the second light.
14. The flashlight of claim 1, wherein the housing includes a reflector assembly in which the second light is received.
15. The flashlight of claim 14, wherein the first light is received in the reflector assembly.
16. The flashlight of claim 14, wherein the reflector assembly is arranged within the housing.
17. The flashlight of claim 1, wherein the flashlight is a right-angle flashlight.
18. The flashlight of claim 1, further comprising:
a fastening member coupled to the housing for fastening the flashlight to a user.
19. The flashlight of claim 1, further comprising:
a charging unit for charging the flashlight.
20. A method of manufacturing a flashlight, the method comprising:
providing a housing for receiving a battery;
arranging a first light to be supported by the housing, the first light configured to emit light in a first direction;
arranging a second light to be supported by the housing, the second light configured to emit light in a second direction transverse to the first direction; and
configuring an actuation switch for selectively powering the first light and the second light with the battery received in the housing.
21. A flashlight comprising:
a housing for receiving a battery;
a first light supported by the housing for emitting light in a first direction;
a second light supported by the housing for emitting light in a second direction that is non-parallel with the first direction; and
an actuation switch configured to selectively powering the first light and the second light with the battery received in the housing.
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. A periodic-pattern suppression method of reducing a spatial frequency component resulting from a stationary grid, contained in an original image signal photographed using said stationary grid, said method comprising the steps of:
transforming said original image signal, represented in a real space domain, into a plurality of transformed image signals which can be handled in a frequency domain; and
reducing a transformed image signal of said transformed image signals which has a desired frequency range containing a spatial frequency component corresponding to at least a grid array frequency of said stationary grid, which is actually used, in only the vicinity of a grid array direction of said stationary grid, not reducing any of said transformed image signals in a different direction from said vicinity of said array direction of said periodic pattern, and then transforming said transformed image signals into an inverse-transformed signal in said real space domain, wherein
said transforming step obtains said plurality of transformed image signals by applying two-dimensional wavelet transformation to said original image signal by the use of a low-pass filter which splits a band so that its response at a frequency greater than the spatial frequency of said stationary grid becomes approximately zero; and
said reducing step further applies a process of reducing a component less than a predetermined frequency and then performs inverse wavelet transformation, with respect to a signal of said transformed image signals which contains a spatial frequency component corresponding to said grid array frequency.
2. The periodic-pattern suppression method as set forth in claim 1, wherein said reducing step reduces a component less than said predetermined frequency, by recursively and repeatedly applying one-dimensional wavelet transformation to the transformed image signal, containing a spatial frequency component corresponding to said grid array frequency, in a grid array direction of said stationary grid by a predetermined number of times by the use of a predetermined band splitting filter, then making zero transform coefficients of a low frequency image signal of a plurality of image signals obtained by said one-dimensional wavelet transformation, and applying inverse one-dimensional wavelet transformation.
3. The periodic-pattern suppression method as set forth in claim 2, wherein said reducing step calculates powers of said plurality of transformed image signals, judges the grid length direction of said stationary grid, based on whether or not each said calculated power is greater than a predetermined threshold value, and applies said process of reducing a component less than a predetermined frequency, based on the result of judgment.
4. The periodic-pattern suppression method as set forth in claim 2, wherein said reducing step reduces a component less than said predetermined frequency, by recursively and repeatedly applying one-dimensional wavelet transformation to the transformed image signal, containing a spatial frequency component corresponding to said grid array frequency, in a grid array direction of each possible stationary grid that may be used by a predetermined band splitting filter, then making zero transform coefficients of a low frequency image signal of a plurality of image signals obtained by said one-dimensional wavelet transformation, and applying inverse one-dimensional wavelet transformation.
5. The periodic-pattern suppression method as set forth in claim 1, wherein said reducing step calculates powers of said plurality of transformed image signals, judges the grid length direction of said stationary grid, based on whether or not each said calculated power is greater than a predetermined threshold value, and applies said process of reducing a component less than a predetermined frequency, based on the result of judgment.
6. The periodic-pattern suppression method as set forth in claim 1, wherein said reducing step reduces a component less than said predetermined frequency with respect to a signal of said transformed image signals wherein said reduction comprises reducing a spatial frequency component corresponding to a grid array frequency of each possible stationary grid that may be used and then performs inverse wavelet transformation.
7. A periodic-pattern suppression method of reducing a spatial frequency component resulting from a stationary grid, contained in an original image signal photographed using said stationary grid, said method comprising the steps of:
transforming said original image signal, represented in a real space domain, into a plurality of transformed image signals which can be handled in a frequency domain; and
reducing a transformed image signal of said transformed image signals which has a desired frequency range containing a spatial frequency component corresponding to at least a grid array frequency of said stationary grid, which is actually used, in only the vicinity of a grid array direction of said stationary grid, not reducing any of said transformed image signals in a different direction from said vicinity of said array direction of said periodic pattern, and then transforming said transformed image signals into an inverse-transformed signal in said real space domain, wherein
said transforming step obtains said plurality of transformed image signals by applying one-dimensional wavelet transformation to said original image signal in the grid length direction of said stationary grid by the use of a predetermined band splitting filter; and
said reducing step further applies a process of reducing a component less than a predetermined frequency and then performs inverse wavelet transformation, with respect to a low frequency image signal of said transformed image signals which contains a spatial frequency component corresponding to the grid array frequency of said stationary grid.
8. The periodic-pattern suppression method as set forth in claim 7, wherein each stationary grid to be used is subjected to said transforming step and said reducing step.
9. A periodic-pattern suppression unit for reducing a spatial frequency component resulting from a stationary grid, contained in an original image signal photographed using said stationary grid, said unit comprising:
image signal transforming means for transforming said original image signal, represented in a real space domain, into a plurality of transformed image signals which can be handled in a frequency domain; and
stationary grid-component suppressing means for reducing a transformed image signal of said transformed image signals which has a desired frequency range containing a spatial frequency component corresponding to at least a grid array frequency of said stationary grid, which is actually used, in only the vicinity of a grid array direction of said stationary grid, not reducing any of said transformed image signals in a different direction from said vicinity of said array direction of said periodic pattern, and then transforming said transformed image signals into an inverse-transformed signal in said real space domain, wherein
said image signal transforming means obtains said plurality of transformed image signals by applying two-dimensional wavelet transformation to said original image signal by the use of a low-pass filter which splits a band so that its response at a frequency greater than the spatial frequency of said stationary grid becomes approximately zero; and
said stationary grid-component suppressing means further applies a process of reducing a component less than a predetermined frequency and then performs inverse wavelet transformation, with respect to an image signal of said transformed image signals which contains a spatial frequency component corresponding to the grid array frequency of said stationary grid.
10. The periodic-pattern suppression unit as set forth in claim 9, wherein said stationary grid-component suppressing means reduces a component less than said predetermined frequency, by recursively and repeatedly applying one-dimensional wavelet transformation to the transformed image signal, containing a spatial frequency component corresponding to said grid array frequency, in a grid array direction of said stationary grid by a predetermined number of times by the use of a predetermined band splitting filter, then making zero transform coefficients of a low frequency image signal of a plurality of image signals obtained by said one-dimensional wavelet transformation, and applying inverse one-dimensional wavelet transformation.
11. The periodic-pattern suppression unit as set forth in claim 10, further comprising stationary grid-direction judging means for calculating powers of said plurality of transformed image signals and judging the grid length direction of said stationary grid, based on whether or not each said calculated power is greater than a predetermined threshold value;
wherein said stationary grid-direction judging means applies said process of reducing a component less than a predetermined frequency, based on the judgment made by said stationary grid-direction judging means.
12. The periodic-pattern suppression unit as set forth in claim 10, wherein said stationary grid-component suppressing means applies said process of reducing a component less than a predetermined frequency, by recursively and repeatedly applying one-dimensional wavelet transformation to the transformed image signal, containing a spatial frequency component corresponding to said grid array frequency, in a grid array direction of each possible stationary grid that may be used by a predetermined number of times by the use of a predetermined band splitting filter, then making zero transform coefficients of a low frequency image signal of a plurality of image signals obtained by said one-dimensional wavelet transformation, and applying inverse one-dimensional wavelet transformation.
13. The periodic-pattern suppression unit as set forth in claim 9, further comprising stationary grid-direction judging means for calculating powers of said plurality of transformed image signals and judging the grid length direction of said stationary grid, based on whether or not each said calculated power is greater than a predetermined threshold value;
wherein said stationary grid-component suppressing means applies said process of reducing a component less than a predetermined frequency, based on the judgment made by said stationary grid-direction judging means.
14. The periodic-pattern suppression unit as set forth in claim 9, wherein said stationary grid-component suppressing means applies said process of reducing a component less than a predetermined frequency with respect to an image signal of said transformed image signals wherein said reduction comprises reducing a spatial frequency component corresponding to the grid array frequency of each possible stationary grid that may be used and then performs inverse wavelet transformation.
15. A periodic-pattern suppression unit for reducing a spatial frequency component resulting from a stationary grid, contained in an original image signal photographed using said stationary grid, said unit comprising:
image signal transforming means for transforming said original image signal, represented in a real space domain, into a plurality of transformed image signals which can be handled in a frequency domain; and
stationary grid-component suppressing means for reducing a transformed image signal of said transformed image signals which has a desired frequency range containing a spatial frequency component corresponding to at least a grid array frequency of said stationary grid, which is actually used, in only the vicinity of a grid array direction of said stationary grid, not reducing any of said transformed image signals in a different direction from said vicinity of said array direction of said periodic pattern, and then transforming said transformed image signals into an inverse-transformed signal in said real space domain, wherein
said image signal transforming means obtains said plurality of transformed image signals by applying one-dimensional wavelet transformation to said original image signal in the grid length direction of said stationary grid by the use of a predetermined band splitting filter; and
said stationary grid-component suppressing means further applies a process of reducing a component less than a predetermined frequency and then performs inverse wavelet transformation, with respect to a low frequency image signal of said transformed image signals which contains a spatial frequency component corresponding to the grid array frequency of said stationary grid.
16. The periodic-pattern suppression unit as set forth in claim 15, wherein
said image signal transforming means applies said one-dimensional wavelet transformation in the grid length direction of each stationary grid to be used; and
said stationary grid-component suppressing means applies said reducing process and said inverse wavelet transformation to each said stationary grid to be used.
17. A periodic-pattern suppression method of reducing a spatial frequency component resulting from a stationary grid, contained in an original image signal photographed using said stationary grid, said method comprising the steps of:
transforming said original image signal, represented in a real space domain, into a plurality of transformed image signals which can be handled in a frequency domain; and
reducing a transformed image signal of said transformed image signals which has a desired frequency range containing a spatial frequency component corresponding to at least a grid array frequency of said stationary grid, which is actually used, in only the vicinity of a grid array direction of said stationary grid, not reducing any of said transformed image signals in a different direction from said vicinity of said array direction of said periodic pattern, and then transforming said transformed image signals into an inverse-transformed signal in said real space domain, wherein said reducing step reduces a component less than a predetermined frequency, by recursively and repeatedly applying one-dimensional wavelet transformation to the transformed image signal, containing a spatial frequency component corresponding to said grid array frequency, in a grid array direction of said stationary grid by a predetermined number of times by the use of a predetermined band splitting filter, then making zero transform coefficients of a low frequency image signal of a plurality of image signals obtained by said one-dimensional wavelet transformation, and applying inverse one-dimensional wavelet transformation.
18. A periodic-pattern suppression unit for reducing a spatial frequency component resulting from a stationary grid, contained in an original image signal photographed using said stationary grid, said unit comprising:
image signal transforming means for transforming said original image signal, represented in a real space domain, into a plurality of transformed image signals which can be handled in a frequency domain; and
stationary grid-component suppressing means for reducing a transformed image signal of said transformed image signals which has a desired frequency range containing a spatial frequency component corresponding to at least a grid array frequency of said stationary grid, which is actually used, in only the vicinity of a grid array direction of said stationary grid, not reducing any of said transformed image signals in a different direction from said vicinity of said array direction of said periodic pattern, and then transforming said transformed image signals into an inverse-transformed signal in said real space domain, wherein said stationary grid-component suppressing means reduces a component less than a predetermined frequency, by recursively and repeatedly applying one-dimensional wavelet transformation to the transformed image signal, containing a spatial frequency component corresponding to said grid array frequency, in a grid array direction of said stationary grid by a predetermined number of times by the use of a predetermined band splitting filter, then making zero transform coefficients of a low frequency image signal of a plurality of image signals obtained by said one-dimensional wavelet transformation, and applying inverse one-dimensional wavelet transformation.
19. A periodic-pattern suppression method of reducing a spatial frequency component which forms a periodic pattern contained in an original image signal, said method comprising the steps of:
transforming said original image signal, represented in a real space domain, into a plurality of transformed image signals which can be handled in a frequency domain; and
reducing a transformed image signal of said transformed image signals which has a desired frequency range containing a spatial frequency component corresponding to at least a frequency of said periodic pattern in only the vicinity of an array direction of said periodic pattern, not reducing any of said transformed image signals in a different direction from said vicinity of said array direction of said periodic pattern, and then transforming said transformed image signals into an inverse-transformed signal in said real space domain, wherein said reducing a transformed image signal comprises reducing the transformed image signal by extracting a low frequency component in a direction perpendicular to said array direction from said transformed image signal containing at least said spatial frequency component corresponding to said frequency of said periodic pattern in said array direction, said low frequency component having a spatial frequency lower than a predetermined value, and then reducing said extracted low frequency component.
20. A periodic-pattern suppression unit for reducing a spatial frequency component which forms a periodic pattern contained in an original image signal, said unit comprising the steps of:
image signal transformation means for transforming said original image signal, represented in a real space domain, into a plurality of transformed image signals which can be handled in a frequency domain; and
periodic-pattern-component suppression means for reducing a transformed image signal of said transformed image signals which has a desired frequency range containing a spatial frequency component corresponding to at least a frequency of said periodic pattern in only the vicinity of an array direction of said periodic pattern, not reducing any of said transformed image signals in a different direction from said vicinity of said array direction of said periodic pattern, and then transforming said transformed image signals into an inverse-transformed signal in said real space domain, wherein said periodic-pattern-component suppression means reduces the transformed image signal by extracting a low frequency component in a direction perpendicular to said array direction from said transformed image signal containing at least said spatial frequency component corresponding to said frequency of said periodic pattern in said array direction, said low frequency component having a spatial frequency lower than a predetermined value, and then reducing said extracted low frequency component.