imfinfo

Gets information from the image, without reading pixel data, using functions defined in the omlimgtoolbox.

Syntax

R = imfinfo(file)

R = imfinfo(file, ext)

Inputs

file
Name of the image file.
Type: string
ext (optional)
Specifies the extension to use for the image file to be read. If this option is used, file should be the base name with no extension specified.
Type: string

Outputs

R
The resulting structure with information about the image in file. R contains the following fields:
BitDepth
Bit depth of the image.
ByteOrder
Byte order stored. Values are 'big-endian' if bytes are packed with the most significant first, 'little-endian' otherwise, or 'undefined' if it cannot be determined.
ColorType
Color type of the image. Values are 'grayscale' for grayscale, 'indexed' if an image indexes into a color map, and 'truecolor' otherwise.
Comment
Text, if any, associated with the image.
Compression
Compression type, if available.
DelayTime
Delay in milliseconds before reading the next image for image formats that support animation.
DisposalMethod
Specifies how succeeding frames are rendered for image formats that support animation.
FileModDate
Last modification date of the image file on disk.
FileSize
Size of the image file on disk.
Filename
Absolute, normalized path to the image.
Format
Image type.
Height
Height of the image in pixels.
LoopCount
Number of loop iterations for an animation.
Quality
Quality of the image, with values from 0-100, 100 being the highest quality.
Width
Width of the image in pixels.
Type: struct

Examples

Obtain information on the image file: 
addlibrary('omlimgtoolbox')
R = imfinfo('img_4871.jpg');
info
info = struct [
BitDepth: 32
ByteOrder: undefined
ColorType: truecolor
Comment: 
Compression: undefined
DelayTime: 0
DisposalMethod: 
FileModDate: Tue Jul 11 09:16:24 2017
FileSize: 9055297
Filename: c:\tests\oml\img_4871.jpg
Format: JPEG
Height: 3096
LoopCount: 0
Quality: 99
Width: 3870
]