1024 768 pixels and the pixel pitch is 18 m, not all pixels are
used to display the elemental image array. The diverging angle
of the projection beam is approximately . The same
microlenslet array used in the pickup procedure is used in the
reconstruction setup, but now working as a micro-convex mirror
array. The microlenslet array does not have coating then it has
small reflectivity due the transparent optic material. In this case,
the focal length of each convex mirror in the array is 0.75 mm.
When displaying the original elemental images we used 23 16
micro-convex mirrors. On the contrary, in the display procedure
of the OM and DM elemental-image arrays we used 46 32 mirrors.
B. Experimental Elemental-Image Arrays
Considering optical magnification by a factor of two, we
picked up four elemental images by MALT at four sampling
positions, , , , (all in millimeters).
These positions correspond to an interval half of the pitch of the
lenslet array. Fig. 9(a) shows 4 4 elements out of the optical
magnified array which have precise optical information about
the objects.
We consider the elemental image array as an input of the
DM method to be magnified. Fig. 9(b) shows 4 4 elemental
images out of the array magnified digitally. In this case, from
(8) is about 6 pixels for both objects.
C. Mean Square Error of Elemental-Image Arrays
We evaluated mean square error (MSE) [24] of the elemental
images obtained by the digital magnification method comparing
them with the elemental images obtained by optical magnifi-
cation method. This calculation gives a numerical comparison.
The images have three channels (RGB) with 256 gray levels. We
obtained a MSE value as 172, which is small value compared
with 803 MSE value when we use only replication of elemental
images for digital magnification.
The value of MSE can be explained for two main reasons:
alignment problem when an optical magnified elemental image
array is arranged, and the mathematical error in the digital calculation
of the new elemental images. Ideal MSE value should
approach zero.
1024 768 pixels and the pixel pitch is 18 m, not all pixels are
used to display the elemental image array. The diverging angle
of the projection beam is approximately . The same
microlenslet array used in the pickup procedure is used in the
reconstruction setup, but now working as a micro-convex mirror
array. The microlenslet array does not have coating then it has
small reflectivity due the transparent optic material. In this case,
the focal length of each convex mirror in the array is 0.75 mm.
When displaying the original elemental images we used 23 16
micro-convex mirrors. On the contrary, in the display procedure
of the OM and DM elemental-image arrays we used 46 32 mirrors.
B. Experimental Elemental-Image Arrays
Considering optical magnification by a factor of two, we
picked up four elemental images by MALT at four sampling
positions, , , , (all in millimeters).
These positions correspond to an interval half of the pitch of the
lenslet array. Fig. 9(a) shows 4 4 elements out of the optical
magnified array which have precise optical information about
the objects.
We consider the elemental image array as an input of the
DM method to be magnified. Fig. 9(b) shows 4 4 elemental
images out of the array magnified digitally. In this case, from
(8) is about 6 pixels for both objects.
C. Mean Square Error of Elemental-Image Arrays
We evaluated mean square error (MSE) [24] of the elemental
images obtained by the digital magnification method comparing
them with the elemental images obtained by optical magnifi-
cation method. This calculation gives a numerical comparison.
The images have three channels (RGB) with 256 gray levels. We
obtained a MSE value as 172, which is small value compared
with 803 MSE value when we use only replication of elemental
images for digital magnification.
The value of MSE can be explained for two main reasons:
alignment problem when an optical magnified elemental image
array is arranged, and the mathematical error in the digital calculation
of the new elemental images. Ideal MSE value should
approach zero.
การแปล กรุณารอสักครู่..
