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enblend - combine images using a multiresolution spline


enblend [options] [--output=IMAGE] INPUT...


Blend INPUT images into a single IMAGE.

INPUT... are image filenames or response filenames. Response filenames start with an "@"


Common options:
-V, --version
output version information and exit

-a pre-assemble non-overlapping images

-h, --help
print this help message and exit

-l, --levels=LEVELS
limit number of blending LEVELS to use (1 to 29); negative number of LEVELS
decreases maximum; "auto" restores the default automatic maximization

-o, --output=FILE
write output to FILE; default: "a.tif"

-v, --verbose[=LEVEL]
verbosely report progress; repeat to increase verbosity or directly set to LEVEL

-w, --wrap[=MODE]
wrap around image boundary, where MODE is "none", "horizontal", "vertical", or
"both"; default: none; without argument the option selects horizontal wrapping

-x checkpoint partial results

set compression of output image to COMPRESSION, where COMPRESSION is: "deflate",
"jpeg", "lzw", "none", "packbits", for TIFF files and 0 to 100, or "jpeg",
"jpeg-arith" for JPEG files, where "jpeg" and "jpeg-arith" accept a compression

set the layer selector ALGORITHM; default: "all-layers"; available algorithms are:
"all-layers": select all layers in all images; "first-layer": select only first
layer in each multi-layer image; "largest-layer": select largest layer in each
multi-layer image; "no-layer": do not select any layer from any image;

set one or more KEY-VALUE pairs

Extended options:
image cache BLOCKSIZE in kilobytes; default: 2048KB

force COLORSPACE for blending operations; Enblend uses "CIECAM" for images with
ICC-profile and "IDENTITY" for those without and also for all floating-point

-c, --ciecam
use CIECAM02 to blend colors; disable with "--no-ciecam"

use the ICC profile from PROFILE-FILE instead of sRGB

-d, --depth=DEPTH
set the number of bits per channel of the output image, where DEPTH is "8", "16",
"32", "r32", or "r64"

-g associated-alpha hack for Gimp (before version 2) and Cinepaint

--gpu use graphics card to accelerate seam-line optimization

manually set the size and position of the output image; useful for cropped and
shifted input TIFF images, such as those produced by Nona

set image CACHESIZE in megabytes; default: 1024MB

Mask generation options:
use main seam finder ALGORITHM, where ALGORITHM is "nearest-feature-transform" or
"graph-cut"; default: "nearest-feature-transform"

use ALGORITHM for calculation of the difference image, where ALGORITHM is
"max-hue-luminance" or "delta-e"; LUMINANCE-WEIGHT and CHROMINANCE-WEIGHT define
the weights of lightness and color; default: delta-e:1:1

--coarse-mask[=FACTOR] shrink overlap regions by FACTOR to speedup mask
generation; this is the default; if omitted FACTOR defaults to 8

generate mask at full image resolution; use e.g. if overlap regions are very

(deprecated) smooth the difference image prior to seam-line optimization with a
Gaussian blur of RADIUS; default: 0 pixels

turn on mask optimization; this is the default

turn off mask optimization

set the optimizer's weigths for distance and mismatch; default: 8:1

set LENGTH of single seam segment; append "%" for relative value; defaults: 4 for
coarse masks and 20 for fine masks

set annealing parameters of optimizer strategy 1; defaults: 0.75:7000:5:32

set search RADIUS of optimizer strategy 2; default: 25 pixels

save generated masks in TEMPLATE; default: "mask-%n.tif"; conversion chars: "%i":
mask index, "%n": mask number, "%p": full path, "%d": dirname, "%b": basename,
"%f": filename, "%e": extension; lowercase characters refer to input images
uppercase to the output image

use existing masks in TEMPLATE instead of generating them; same template characters
as "--save-masks"; default: "mask-%n.tif"

--visualize[=TEMPLATE] save results of optimizer in TEMPLATE; same template
characters as "--save-masks"; default: "vis-%n.tif"

Enblend accepts arguments to any option in uppercase as well as in lowercase letters.


TMPDIR The TMPDIR environment variable points to the directory, where to store ImageCache
files. If unset Enblend uses "/tmp".

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