Editing Scanco User Instructions (section)

==Image Data==
===Image Data Type===
====Binary Images====
Binary images are images whose pixels contain only two possible intensity values (off-on, or black-white B&W). The off or black value is usually 0 and the on or white value is usually 1 (1-bit pixel) or 255 (8-bit pixel). This type of image is commonly used as a multiplier to mask regions within another image.

====Grayscale Images====
Grayscale images represent intensities. Pixels range from least intense (black) to most intense (white). Pixel values usually range from 0 to 255 or are scaled to this range when displayed.

====Indexed Images====
An indexed image uses direct mapping of pixel values to colormap values. Instead of intensities, a pixel value within an indexed image relates to a color value within a color lookup table. An indexed image consists of a data matrix and a colormap matrix. The data matrix can be of class uint8, uint16, or double. The colormap matrix is an m-by-3 array of class double containing floating-point values in the range [0,1]. Each row of map specifies the red, green, and blue components of a single color. Since indexed images reference color tables composed of up to 256 colors, the data values of these images are usually scaled to range from 0 to 255.

====RGB Images====
Within the three-dimensional array of an RGB image, two of the dimensions specify the location of a pixel within an image. The other dimension specifies the color of each pixel. The color dimension always has a size of 3 and is composed of the red, green, and blue color bands (channels) of the image.


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===Image Data Pixel Values===
The image data type is determined by the pixel depth in bits per channel, or bit depth. Bit depth for each channel can be 8, 16, 32 or 64. The data may be signed, unsigned (u), floating-point (f), real or complex (c) for some arithmetic functions, where each channel value is represented by two numbers: real and imaginary part. All channels in an image must have the same data type.

{| class="wikitable"
|-
! scope="col"| Image Data Type
! scope="col"| Name
! scope="col"| Byte
! scope="col"| Value Range
! scope='col'| Comments
|-
! scope="row"| char
| 8-bit signed integer
| 1
| -128 ~ 127 
| Scanco SEG.AIM, GOBJ  
|-
! scope="row"| uchar
| 8-bit unsigned integer
| 1
| 0 ~ 255
| 
|-
! scope="row"| int
| 16-bit signed integer
| 2
| −32768 ~ 32767
| Scanco grey-scaled images, ISQ, AIM 
|-
! scope="row"| uint
| 16-bit unsigned integer
| 2
| 0 ~ 65535
| Converted format of Scanco grey-scaled images
|-
! scope="row"| long
| 32-bit signed integer
| 4
| −2^31 ~ 2^31 - 1
| 
|-
! scope="row"| ulong
| 32-bit unsigned integer
| 4
| 0 ~ 2^32 - 1
| 
|-
! scope="row"| float
| floating point
| 4
| ±3.40282347 E+38
| 32-bit single-precision with 6~7 significant digits
|-
! scope="row"| long64
| 64-bit signed integer
| 8
| −2^63 ~ 2^63 - 1
| 
|-
! scope="row"| ulong64
| 64-bit unsigned integer
| 8
| 0 ~ 2^64 - 1
| 
|-
! scope="row"| double
| double precision floating point
| 8
| ±1.79769313486231570 E+308
| 64-bit double-precision with 15~16 significant digits
|-
! scope="row"| complex
| floating point complex
| 8
| same as floating-point
| same as floating-point
|-
! scope="row"| dcomplex
| double precision complex
| 16
| same as double-precision
| same as double-precision
|}


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===Scanco Image File Types===

{| class="wikitable"
! scope="col"| Extension 
! scope="col", style="width: 65%"| Description 
! scope="col"| Creation 
! scope="col"| Opens with 
|-
! scope="row"| RSQ 
| '''R'''aw '''S'''e'''Q'''uence data. This is the raw data collected after the scan. This file contains the bright and dark field corrections and the raw projections. || created with scan || $ x 
|-
! scope="row"| ISQ 
| '''I'''mage '''S'''e'''Q'''uence data. This is the reconstructed 3D image, which you see in the µCT Evaluation Program. || created from RSQ 
| $ uct_evaluation 
$ x 
|-
! scope="row"| AIM 
| '''A'''ny '''IM'''age data. This is a binary raw data format (16-bit signed data, little endian) 3D discretized data you see using the µCT Ray Program and used for the analysis. The AIM file is a volume of interest isolated from the ISQ file.  || extracted from ISQ 
|$ uct_3d
$ uct_evaluation 
|-
! scope="row"| GOBJ 
| '''G'''raphical '''OBJ'''ect data. These are the green contours in the µCT Evaluation Program, which are used to isolate regions of interest from an AIM file for analysis. || extracted from ISQ/AIM || $ uct_evaluation   
|-
! scope="row"| SCV
| '''SC'''out '''V'''iew || created with scan || $ x   
|-
! scope="row"| RAD
| Scout View || created with scan || $ x   
|-
! scope="row"| RSW 
| raw data (RSQ) || created with scan || $ x  
|-
! scope="row"| IMA 
| image data (AIM, ISQ, GOBJ)|| created from RSQ || $ uct_evaluation 
|}
*Refer to [[Media:Aimpack_documentation.pdf|'''Scanco Aim Format''' ]] or its [[Media:Scanco_Aim_File_Format.doc|'''Doc Format''']] for its header info.


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