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Volume 25 (1986)
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Volume 25, Issue 2
Displaying 1-7 of 7 articles from this issue
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[in Japanese]1986 Volume 25 Issue 2 Pages 1
Published: April 30, 1986
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (1685K) -
1986 Volume 25 Issue 2 Pages 2-3
Published: April 30, 1986
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (5584K) -
Yukio Mukai, Shoji Takeuchi1986 Volume 25 Issue 2 Pages 4-12
Published: April 30, 1986
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSThis paper descibes the procedure of registration of two digital images using two steps resampling method, a fine registration by the second step resampling after a coarse registration by the first step resampling. Inorder to register two images, as many as possible standard points for the registration (Registration GCP) should be selected all over the images and the root mean square of the positional errors of the Registration GCPs between the two images should be minimized. The positional errors of the Registration GCPs between the two images could be obtained automatically by computing the correlation coefficients between the two image chips (16×16) around the Registration GCPs, which enabled a quick process of image registration. Band 6 was best for automatic image matching in registering two Landstat MSS images. The relationship between the registration accuracy and the number of the Registration GCPs was also examined.View full abstractDownload PDF (2510K) -
Xing Chiao Tang, Shunji Murai, Ryuji Matsuoka1986 Volume 25 Issue 2 Pages 13-23
Published: April 30, 1986
Released on J-STAGE: March 19, 2010
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—Matching Stabilization Using a Narrow Band-pass Filter—Susumu Hattori, Chuji Mori, Osamu Uchida, Shigeo Fujiwara1986 Volume 25 Issue 2 Pages 24-38
Published: April 30, 1986
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSThis paper, following the previous one, treats some improvements of the stereo matching method that has been proposed by the authors. The major effort is bent to find and process occlusions using a narrow band-pass filter. The obtained results are as follows:
(1) In the author's matching structure, stereo images are subdivided to overlapping patch pairs which make processed units for matching. Correlation windows around the grid points which are located on a left patch are correlated to the respective search windows on the right one. The previous paper showed that for finding the position of occlusions median filtering of measured x-parallaxes is useful. But matching convergency and precision is still insufficient in the marginal area of patches. Especially in case that occlusions appear in the margin, matching tends to wander. To keep the precision uniform, it is suggested in this paper that the grid points included in the margin, the width of which is possible maximum occlusion width plus the width of the median filter, should be discarded.
(2) It is proved that unstableness of matching in the presence of projective distortions or ther noises comes from the fact that images contain wide band range of frequencies. Hence the images are filtered with a narrow band-pass filter beforehand to raise up matching convergency and precision. In particular the so-called Laplacian of Gaussian filter has preferable properties for this purpose.View full abstractDownload PDF (9407K) -
[in Japanese]1986 Volume 25 Issue 2 Pages 48-51
Published: April 30, 1986
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (2406K) -
1986 Volume 25 Issue 2 Pages 52-54
Published: April 30, 1986
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (5923K)
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