gives the array of pixel values converted to the specified type.
Details and Options
- ImageData[image] by default gives a 2D or 3D array whose elements are lists of values for each channel. For a single-channel image, only a value and not a list of values is returned.
- In 2D, the array generated by ImageData[image] is arranged in the same way that the image is displayed, with the first row corresponding to the top row of pixels in the image.
- In 3D, the array generated by ImageData[image] is arranged such that the first part corresponds to the top slice, with rows running from back to front, and columns running from left to right.
- For binary images, ImageData[image] returns integer values 0 or 1. For images of type "Byte" or "Bit16", ImageData[image] always normalizes values to lie between 0 and 1. For images of a real type, ImageData[image] returns whatever real values are used in the image.
- Possible types specified by ImageData[image,"type"] are:
"Bit" integer 0 or 1 "Byte" integer 0 through 255 "Bit16" integer 0 through 65535 "Real32" single-precision real (32-bit) "Real64" double-precision real (64-bit)
- ImageData[image,Automatic] is equivalent to ImageData[image,ImageType[image]].
- ImageData has the option Interleaving.
- With the default setting Interleaving->True, ImageData returns a 2D or 3D array of lists of channel values.
- With Interleaving->False, ImageData returns a list of 2D or 3D arrays of values for each channel.
- Interleaving->Automatic returns in the native form used to store the image.
- ImageData accepts a DataReversed option. With DataReversed->True, the order of the rows is reversed.
Examplesopen all close all
Basic Examples (3)
Properties & Relations (2)
Introduced in 2008Updated in 2012