Numazawa`s Home Page Eclipse

Images of Total Solar Eclipse in Aruba Island

MULTIPLE LAYER DIGITAL PROCESSING

From now, I reach the parameter by image processing on the computer, and following it, I did process in the darkroom. They are corona image of 1991 and 1994.
But recently an ability of our computer increases rapidly, so I decide that I make every process on desktop at this time.

This time, to making a corona7.jpg image, I did;

1
9 different exposure time transparency films taken by 6x6camera+1400mm lens

2
digitize those images using High end Scanner of Dmax4.5,RGB36bit ieach image is 4000x4000pixel

3
Using a software Photoshop4.0 on MAC computer, I adjust a tone curve of 36bit data and change to 24bit data from 36bit, then save it with an other mane.

4
Using Photoshop, 24bit 9 images open on each layer. At that time, lower image is shorter exposure image.

5
adjust a transparency and look a lower image through upper image then adjust the position of each image.

6
select white over exposure part and make a quick mask. shade off a outline of the mask using gausian blur filter and select it.then cut off it from RGB image. This process should be done from the top image to the bottom.

7
cut a white part where is saturated with signal, we can see useful part under image.

8
do this process to 8th image, we can see every useful signal parts of every images.++++(PhotoShop 4.0 desktop)

9
adjust a density of each image and check whether it is natural, and superimpose every layer to make one image.

10
use a weak unsharp mask to clear a structure.

I call this way " Multiple layer method"

This method is less a loss of gradation than previous SUM method that use unsharp mask many times, and more beautiful.
A using transparency way can make an image that has higher saturation, higher contrast and wider gradation than a using negative film way.(but in the case of transparency it is twice piece of negative images.)

1998.04.30 Shigemi Numazawa

CORONA PAGE

踢滍昐ɪ及允屯化及綜圴反﹜ ╡atlas@atlasphoto.com╡匹棟咥仄化中引允﹝

杽中寧歹六燮╡jpl@jplnet.com╡

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1	9 different exposure time transparency films taken by 6x6camera+1400mm lens
2	digitize those images using High end Scanner of Dmax4.5,RGB36bit ieach image is 4000x4000pixel
3	Using a software Photoshop4.0 on MAC computer, I adjust a tone curve of 36bit data and change to 24bit data from 36bit, then save it with an other mane.
4	Using Photoshop, 24bit 9 images open on each layer. At that time, lower image is shorter exposure image.
5	adjust a transparency and look a lower image through upper image then adjust the position of each image.
6	select white over exposure part and make a quick mask. shade off a outline of the mask using gausian blur filter and select it.then cut off it from RGB image. This process should be done from the top image to the bottom.
7	cut a white part where is saturated with signal, we can see useful part under image.
8	do this process to 8th image, we can see every useful signal parts of every images.++++(PhotoShop 4.0 desktop)
9	adjust a density of each image and check whether it is natural, and superimpose every layer to make one image.
10	use a weak unsharp mask to clear a structure.