| Using Adobe Photoshop to read .IV
files |
Alternate approach
- use ImageView, which is supplied with all OI systems, to open the
IV file and output one of the formats that PhotoShop can open directly.
| three steps to open
the IV file directly in Adobe Photoshop |
- Click on 'File' menu and select option 'Open
As...'. A browsing window will show up.
- At lower left corner of the window there is
an entry for 'Open File as Format Type' the default value for
the type is 'Photoshop 3.0 (*.PSD)'. Change the type to 'Raw (*.RAW).
Select the directory where the files are located and select the
file to be opened.
- Another window will come up that will
allow you to enter the RAW image parameters :
a. Enter image Dimensions (Width and Height in pixels).
b. Leave channels as default (Count = 1, Depth = 8).
c. Enter image header as 12 bytes.
If you do not know the image size, then leave
Width & Height blank and enter the header as 12 bytes and then
press 'Guess' a few times until Adobe Photoshop selects the right
image size for you.
After pressing 'OK' the image should appear
on the screen.
| Changing the image look up table (Color
Table): |
Vdaq uses a few special look up tables to show images:
- SAT.LUT
is used by the calibration procedures to show color reference
images.
- RESERV16.LUT
is used to show the online analysis results (screenX.iv).
- GRAY.LUT
for any other gray level image.
After loading an IV image to Adobe Photoshop,
we can change the look up table by doing :
- Select the 'Mode' menu option for 'Indexed Color'.
- Select the 'Mode' menu option for 'Color Table...'.
A window will come up that usually allow you to change each pixel
color. Press 'Load...', another window will come up that will
allow you to select a look up table, select one of the following
tables :
- SatLut.ACT : for color
reference images.
- Reserv16.ACT : for screenX.iv
images.
- After pressing 'OK' the image will be
displayed using the new look up table.
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