In addition to these png parameters, you can use any

parameter name that satisfies the PNG specification for

keywords: only printable characters, 80 characters or

fewer, and no leading or trailing spaces. The value

corresponding to these user-specified parameters must be a

string that contains no control characters except for

linefeed.

RAS - specific parameters

-----------------------

'Type' One of these strings: 'standard'

(uncompressed, b-g-r color order with

truecolor images), 'rgb' (like 'standard',

but uses r-g-b color order for truecolor

Images), 'rle' (run-length encoding of 1-bit

and 8-bit images)

'Alpha' A matrix specifying the transparency of each

pixel individually; the row and column

dimensions must be the same as the data

array; may be uint8, uint16, or double. May

only be used with truecolor images.

PBM, PGM, and PPM-specific parameters

------------------------

'Encoding' One of these strings: 'ASCII' for plain encoding

or 'rawbits' for binary encoding. Default is 'rawbits'.

'MaxValue' A scalar indicating the maximum gray or color

value. Available only for PGM and PPM files.

For PBM files, this value is always 1. Default

is 65535 if image array is 'uint16' and 255 otherwise.

Table: summary of supported image types

---------------------------------------

BMP 1-bit, 8-bit and 24-bit uncompressed images

GIF 8-bit images

HDF 8-bit raster image datasets, with or without associated

colormap; 24-bit raster image datasets; uncompressed or

with RLE or JPEG compression

JPEG 8-bit, 12-bit, and 16-bit Baseline JPEG images

JPEG2000 1-bit, 8-bit, and 16-bit JPEG2000 images

PBM Any 1-bit PBM image, ASCII (plain) or raw (binary) encoding.

PCX 8-bit images

PGM Any standard PGM image. ASCII (plain) encoded with

arbitrary color depth. Raw (binary) encoded with up

to 16 bits per gray value.

PNG 1-bit, 2-bit, 4-bit, 8-bit, and 16-bit grayscale

images; 8-bit and 16-bit grayscale images with alpha

channels; 1-bit, 2-bit, 4-bit, and 8-bit indexed

images; 24-bit and 48-bit truecolor images; 24-bit

and 48-bit truecolor images with alpha channels

PNM Any of PPM/PGM/PBM (see above) chosen automatically.

PPM Any standard PPM image. ASCII (plain) encoded with

arbitrary color depth. Raw (binary) encoded with up

to 16 bits per color component.

RAS Any RAS image, including 1-bit bitmap, 8-bit indexed,

24-bit truecolor and 32-bit truecolor with alpha.

TIFF Baseline TIFF images, including 1-bit, 8-bit, 16-bit,

and 24-bit uncompressed images, images with packbits

compression, images with LZW compression, and images

with Deflate compression; 8-bit and 24-bit images with

JPEG compression; 1-bit images with CCITT 1D, Group 3,

and Group 4 compression; CIELAB, ICCLAB, and CMYK images.

XWD 8-bit ZPixmaps

Please read the file libtiffcopyright.txt for more information.

See also imfinfo, imread, imformats, fwrite, getframe.

Reference page in Help browser

doc imwrite

<imfinfo> - Information about graphics file.

IMFINFO Information about graphics file.

INFO = IMFINFO(FILENAME,FMT) returns a structure whose

fields contain information about an image in a graphics

file. FILENAME is a string that specifies the name of the

graphics file, and FMT is a string that specifies the format

of the file. The file must be in the current directory or in

a directory on the MATLAB path. If IMFINFO cannot find a

file named FILENAME, it looks for a file named FILENAME.FMT.

The possible values for FMT are contained in the file format

registry, which is accessed via the IMFORMATS command.

If FILENAME is a TIFF, HDF, ICO, GIF, or CUR file containing more

than one image, INFO is a structure array with one element for

each image in the file. For example, INFO(3) would contain

information about the third image in the file.

INFO = IMFINFO(FILENAME) attempts to infer the format of the

file from its content.

INFO = IMFINFO(URL,...) reads the image from an Internet URL.

The URL must include the protocol type (e.g., "http://").

The set of fields in INFO depends on the individual file and

its format. However, the first nine fields are always the

same. These common fields are:

Filename A string containing the name of the file

FileModDate A string containing the modification date of

the file

FileSize An integer indicating the size of the file in

bytes

Format A string containing the file format, as

specified by FMT; for formats with more than one

possible extension (e.g., JPEG and TIFF files),

the first variant in the registry is returned

FormatVersion A string or number specifying the file format

version

Width An integer indicating the width of the image

in pixels

Height An integer indicating the height of the image

in pixels

BitDepth An integer indicating the number of bits per

pixel

ColorType A string indicating the type of image; this could

include, but is not limited to, 'truecolor' for a

truecolor (RGB) image, 'grayscale', for a grayscale

intensity image, or 'indexed' for an indexed image.

If FILENAME contains Exif tags (JPEG and TIFF only), then the INFO

struct may also contain 'DigitalCamera' or 'GPSInfo' (global

positioning system information) fields.

The value of the GIF format's 'DelayTime' field is given in hundredths

of seconds.

Example:

info = imfinfo('ngc6543a.jpg');

See also imread, imwrite, imformats.

Reference page in Help browser

doc imfinfo

<im2java> - Convert image to Java image.

IM2JAVA Convert image to Java image.

JIMAGE = IM2JAVA(I) converts the intensity image I to an instance of

the Java image class, java.awt.Image.

JIMAGE = IM2JAVA(X,MAP) converts the indexed image X with colormap

MAP to an instance of the Java image class, java.awt.Image.

JIMAGE = IM2JAVA(RGB) converts the RGB image RGB to an instance of

the Java image class, java.awt.Image.

Class Support

-------------

The input image can be of class uint8, uint16, or double.

Note

----

Java requires uint8 data to create an instance of java.awt.Image. If the

input image is of class uint8, JIMAGE contains the same uint8 data. If the

input image is of class double or uint16, im2java makes an equivalent

image of class uint8, rescaling or offsetting the data as necessary, and

then converts this uint8 representation to an instance of java.awt.Image.

Example

-------

This example reads an image into the MATLAB workspace and then uses

im2java to convert it into an instance of the Java image class.

I = imread('moon.tif');

javaImage = im2java(I);

icon = javax.swing.ImageIcon(javaImage);

label = javax.swing.JLabel(icon);

pSize = label.getPreferredSize;

f = figure('visible','off');

fPos = get(f,'Position');

fPos(3:4) = [pSize.width, pSize.height];

set(f,'Position',fPos);

hLabel= javacomponent(label,[0 0 fPos(3:4)], f);

figure(f)

Reference page in Help browser

doc im2java

Movies and animation

<getframe> - Get movie frame.

GETFRAME Get movie frame.

GETFRAME returns a movie frame. The frame is a snapshot

of the current axis. GETFRAME is usually used in a FOR loop

to assemble an array of movie frames for playback using MOVIE.

For example:

for j=1:n

plot_command

M(j) = getframe;

end

movie(M)

GETFRAME(H) gets a frame from object H, where H is a handle

to a figure or an axis.

GETFRAME(H,RECT) specifies the rectangle to copy the bitmap

from, in pixels, relative to the lower-left corner of object H.

F = GETFRAME(...) returns a movie frame which is a structure

having the fields "cdata" and "colormap" which contain the

the image data in a uint8 matrix and the colormap in a double

matrix. F.cdata will be Height-by-Width-by-3 and F.colormap

will be empty on systems that use TrueColor graphics.

For example:

f = getframe(gcf);

colormap(f.colormap);