`getrangefromclass`

Returns the minimum and maximum values of an image's data class.

Category: Graphics > Images

Syntax

range = getrangefromclass(I)

Returns [min max] for the class of I.

Description

Only the class of I matters, not its values. For integer classes the range is the full span of the type; for floating-point and logical images the conventional display range [0 1] is returned. It is useful for scaling code that must work with several image classes.

Input arguments

I: Image array of any numeric or logical class.

Output arguments

range: Two-element vector: [0 255] for uint8, [-32768 32767] for int16, [0 1] for double, single and logical.

Example

Ranges by class

getrangefromclass(uint8(1))
getrangefromclass(int16(1))
getrangefromclass(0.5)

Output

ans = 1×2

     0   255
ans = 1×2

      -32768       32767
ans = 1×2

     0     1

See also

im2double intmax intmin class