- •In the structure returned from imfinfo function.
- •In addition to these png parameters, you can use any
- •Images), 'rle' (run-length encoding of 1-bit
- •Interleave: The format in which the data is stored. This can be
- •Cdf file handling
- •Image An array of structures containing information
- •IdxMapInfo a structure with 'Map' and 'Size' describing the
- •Vdata | 'Fields'
- •Values for 'Interpolate' are: lon, lat
- •It is written in the file. Each dimension in the file's datasets
- •Hdf version 5 data objects
- •Cdf library interface
- •Inquire - return basic characteristics of cdf
- •InquireVar - return information about cdf variable
- •Hdf version 4 library interface
- •Identifier.
- •Values for funcstr. For example, hdfdf24('lastref') corresponds to the
- •Values for funcstr. For example, hdfdfr8('setpalette',map) corresponds
- •Identifier.
- •In cases where the hdf c library accepts null for certain inputs, an
- •Identical to maxcache, but is -1 if the operation fails.
- •Xdimsize,ydimsize,upleft,lowright)
- •Vector of up to 13 elements containing projection-specific
- •Vector containing the number of values to read along each
- •Is a vector containing the dimension sizes of the subsetted region.
- •Index (zero-based) of the desired level. Fieldlist is a string
- •Vert_field,range)
- •Is an array containing the rank (number of dimensions) for each
- •Is an array of compression parameters. Status is -1 and other
- •Hdf version 5 library interface
- •Iterate - Calls a user function for each attribute
- •Vlen_get_buf_size - Determines storage requirements for vl data
- •Is_hdf5 - Determines if a file is in the hdf5 format
- •Is_simple - Determines if dataspace is simple
- •LibTiff library interface
- •InkSet - Set of inks used in a separated image
- •NetCdf library interface
- •In most cases, the syntax of the matlab function is similar to the
Values for funcstr. For example, hdfdfr8('setpalette',map) corresponds
to the C library call DFR8setpalette(map).
Syntax conventions
------------------
A status or identifier output of -1 indicates that the operation
failed.
HDF uses C-style ordering of elements, in which elements along the last
dimension vary fastest. MATLAB uses FORTRAN-style ordering, in which
elements along the first dimension vary fastest. HDFDFR8 does not
automatically convert from C-style ordering to MATLAB-style ordering,
which means that MATLAB image and colormap matrices need to be
transposed when using HDFDFR8 to read or write from HDF files.
Functions in HDFDFR8 that read and write palette information expect to
use uint8 data in the range [0,255], while MATLAB colormaps contain
double-precision values in the range [0,1]. Therefore, HDF palettes
need to be converted to double and scaled to be used as MATLAB
colormaps.
Write functions
----------------
Write functions create raster image sets and store them in new files or
append them to existing files.
status = hdfdfr8('writeref',filename,ref)
Stores the raster image using the specified reference number.
status = hdfdfr8('setpalette',colormap)
Sets palette for multiple 8-bit raster images.
status = hdfdfr8('addimage',filename,X,compress)
Appends an 8-bit raster image to a file; compress can be 'none',
'rle', 'jpeg', or 'imcomp'.
status = hdfdfr8('putimage',filename,X,compress)
Writes an 8-bit raster image to an existing file or creates the
file; compress can be 'none', 'rle', 'jpeg', or 'imcomp'.
status = hdfdfr8('setcompress',compress_type,...)
Sets the compression type. compress_type can be 'none', 'rle',
'jpeg', or 'imcomp'. If compress_type is 'jpeg', then two
additional parameters must be passed in: quality (a scalar between
0 and 100) and force_baseline (either 0 or 1). Other compression
types do not have additional parameters.
Read functions
----------------
Read functions determine the dimension and palette assignment for an
image set, read the actual image data, and provide sequential or random
read access to any raster image set.
[width,height,hasmap,status] = hdfdfr8('getdims',filename)
Retrieves dimensions for an 8-bit raster image.
[X,map,status] = hdfdfr8('getimage',filename)
Retrieves an 8-bit raster image and its palette.
status = hdfdfr8('readref',filename,ref)
Gets the next raster image with the specified reference number.
status = hdfdfr8('restart')
Ignores information about last file accessed and restarts from
beginning.
num_images = hdfdfr8('nimages',filename)
Returns number of raster images in a file.
ref = hdfdfr8('lastref')
Returns reference number of last element accessed.
Please read the file hdf4copyright.txt for more information.
See also hdf, hdfan, hdfdf24, hdfh, hdfhd,
hdfhe, hdfhx, hdfml, hdfsd, hdfv, hdfvf, hdfvh, hdfvs
<hdfh> - MATLAB Gateway to HDF H interface.
HDFH MATLAB gateway to the HDF H interface.
HDFH is a gateway to the HDF H interface.
The general syntax for HDFH is HDFH(funcstr,param1,param2,...). There
is a one-to-one correspondence between H functions in the HDF library
and valid values for funcstr. For example, HDFH('close',file_id)
corresponds to the C library call Hclose(file_id).
Syntax conventions
------------------
A status or identifier output of -1 indicates that the operation
failed.
status = hdfh('appendable',access_id)
Specifies that the element can be appended to.
status = hdfh('close',file_id)
Closes the access path to the file.
status = hdfh('deldd',file_id,tag,ref)
Deletes a tag and reference number from the data descriptor list.
status = hdfh('dupdd',file_id,tag,ref,old_tag,old_ref)
status = hdfh('endaccess',access_id)
Terminates access to a data object by disposing of the access