current release 19.0
Fotoxx is a free open source Linux program for
image editing and collection management.
The goal is to meet the needs of serious photographers while
remaining fast and easy to use.
Click the image
above to see a full-size image.
Navigate a large image collection using a
thumbnail browser, click on an image to view
or edit. A rich set of edit and
retouch functions is available. Import RAW
files and edit with deep color. Save revised
images as JPEG, PNG (8/16
bits), or TIFF (8/16). Select an object or
area within an image (freehand draw, follow
edges, fill matching tones...),
apply edit functions, copy and paste,
resize, blend, warp, etc. without using
layers. Edit functions have fast feedback
using the full image. Edit image metadata
(tags, geotags, dates, ratings,
captions...). Search images using any
combination of metadata and file and folder
names or partial names. Click on a marked
map location to view all photos
from that location. Batch functions are
available to rename, add/revise metadata,
copy/move, resize, convert format.
Fotoxx uses your image files wherever they
are and maintains a separate index for fast
searching. Fotoxx is standards
compliant and can be used with other photo
programs (no lock-in). Fotoxx is easy to use
but unconventional, so read the
user manual (at least the first few pages)
release can be obtained
can be found HERE.
jump to the examples
Fotoxx is a free Linux program
for editing photos or other images
and managing a large
be viewed as a
fast. Click on
for a full
window view of
the image. The
image can be
small to huge.
can be used
images at any
also used to
has many editing tools that go
beyond the basics. Images with
severe problems (underexposed, false
uneven lighting, fog/haze) can be
brought back to life. Details lost
in shadows or haze can be brought
standards compliant. Nothing done by
Fotoxx makes your images less usable
with other applications. Fotoxx uses
image files wherever they are: they
are not moved or duplicated. Fotoxx
does create an index for fast image
and thumbnail images for fast
gallery displays. These add
typically 2% to overall storage
requirements. There is no
database to manage - the index
import RAW images and perform all
processing in deep color (24 bits
per color is used internally).
Edited images can be
saved as JPEG, TIFF (8/16
bits/color), or PNG (8/16 bits).
functions are interactive, giving
rapid response to adjustments using
the full image or a chosen area.
Undo and Redo
can be applied serially to all the
edits of an image. Intermediate and
final results can be saved as new
files or as
versions of the input file (e.g.
Objects or areas within an image can
be selected and edited separately
from the background. Areas can be
several mouse methods: drag to
select and expand into matching
tones, follow feature edges, or
outline an area
freehand. There is a special tool to
select complex features, such as
hair or foliage.
Edit results are seen instantly in
the image or selected areas.
Selected areas can be copied and
pasted into the same
or other images, resized, rotated,
brightened, etc. Layers are not
are available to copy, move, rename,
resize, upright, convert format, and
are available to change size and
shape: trim (crop), resize, rotate,
fix perspective, curve/warp the
or selected areas within the image.
There is a special tool to 'flatten'
photos of curved book pages (where
the text is
squeezed together at the center
Dust spots from old slides or photos
can be removed, roadside trash or
power lines can be erased. Panoramas
can be made
by stitching photos together
seamlessly, matching brightness and
color. Photos with a range of
exposure values can be
combined into an HDR image with
adjustable contributions. Photos
with varying depth of focus can be
combined into an
image that is sharp over the
combined range. Photos of one scene
taken at different moments can be
combined to remove
passing autos or tourists. Multiple
photos made under low light
conditions can be combined to reduce
noise. Images and
text can be combined into a montage,
using the mouse to position and
resize the elements and adjust
Fotoxx has a batch scripting tool to
speed the processing of multiple
images requiring the same edits:
record the edits
made to a base image and then apply
these edits automatically to any
number of selected images.
Many special effects ('filters') are
available to convert a photo into a
line drawing, sketch, painting,
cartoon, dot image, mosaic, or
abstract patterns. Background
patterns and textures can be added.
Images can be rapidly searched using
file and folder names or partial
names, dates, assigned tags,
and any other metadata stored in the
image. Some data is automatic from
the camera (date, location, exposure
other data can be manually
tools are available to load metadata into many images at once. Search
criteria can be used in combination;
Chicago photos for years 2002-2005
containing tags "Barbara" or
a camera GPS or entered manually)
can also be searched. You can view a
map of any region in the world, at
scale, using an internet map
service. Images having location data
show as markers on these maps. Click
a marker to get
a gallery of the corresponding
viewed full size or
files of the world, each continent,
and some countries are also
available, and you can add your own
maps at any scale.
Local maps have no dependency on the
internet. You can jump from a given
photo to its position on a world
you can find other photos from the
same or nearby positions.
Slide shows can be prepared. Choose
animated transitions between images,
pan and zoom effects, and places to
Fotoxx includes a comprehensive user
manual that also serves as
interactive help on a function by
function basis. You
should take the time to read the
overview pages. The function details
can be viewed as needed.
Detailed List of Fotoxx
- Thumbnail browser and navigator,
variable thumbnail size or list view.
- Click on a thumbnail image to view or
edit, or use a File Open dialog.
- View and edit most image formats and
camera RAW formats.
- Menu-driven function selection, with
custom popup menu for favorites.
- Edits have live feedback using the whole
image or a chosen zoomed area.
- Edits are accumulated. Stepwise
undo/redo and before/after compare.
- Edit the whole image or a selected
object or area within the image.
- Use the mouse to select/enclose an
object or area to edit.
- Select using freehand draw, follow edge,
spread into matching tones, others.
- Special select function for "hairy"
objects (complex edges, poor contrast).
- Selections can be cut out, saved,
recalled, pasted, resized, rotated, edited.
- Zoom in/out with mouse clicks or mouse
wheel. Edit zoomed image.
- Scroll/pan a zoomed image by dragging
- Save edited image: replace, save as new
file version or new file name.
- Saved image formats: JPEG, PNG (8/16
bits/color), TIFF (8/16).
- Comprehensive user guide is available in
- F1 key pops-up the current menu topic in
the user guide.
Edit and Retouch
type (24 bits
drag curves using the mouse while
watching a live
image (sub-second response on
color caste, even if it varies
balance or black level
adjustment with a slider
faded photos or photos with
Noise reduction (several methods
usually 1 click each, with backup
method for hard
flatten brightness distribution to
to enhance detail in dark or
uniformity problems (vignetting
remove power lines, ground litter,
pixelation (jagged edges) in low
spots on images from dusty scanned
slides or old
color adjustments or match to
fix hot/dark pixels (from camera
aberration (color fringes) by
rescaling RGB color
pixels or small areas using the
over unwanted objects with
background taken from
can be amplified/attenuated by
retouch functions locally and
gradually using the
within an image or from one image
to another, with
drag a mask or directly set
desired size and aspect
1/2, 2/3 etc. or set desired size.
Lock or change aspect
90 degree steps or use any angle.
Level by dragging the image
black/white or color negative, or
color profile of an image, e.g.
Adobe RGB <-->
black/white with sepia tint (aged
on image: adjustable font, color,
image to fix perspective,
straighten curves, or for special
photo of a curved page from a
thick book, stretch squished
dark/bright images, adjust
relative inputs by dragging
near- and far-focus images to get
a greater focus
by combining and averaging
people or cars: combine photos
2-4 overlapped images horizontally
(hand-held photos work OK (some
care is needed, but not a
arrange images and text on a
background, move around
with the mouse, adjust size,
angle, transparency, font and font
image (reduce color
to drawing (charcoal, blackboard,
effect (surface depth, 3D
any size, with or without borders.
Pixelize to obscure a
effect: convert an image into a
painting: aggregate adjacent
matching tones into larger
unpaint using the mouse, with
variable brush size and
photo into a cartoon-like
to an image background, random or
image into a mosaic using tiles
made from your image
image into a spherical
transform kernels are supplied.
Edit and add custom
features and blur the
metadata in a popup window, or a
compact report with key
report any metadata, show
thumbnail gallery with
geotags (location data), ratings,
comments, captions ... any
using these criteria plus
folder/file names (also partial
is a thumbnail gallery. Search
speed is nearly
create, delete, group into
categories for easy
coordinates and location names)
may come from a camera GPS
or be entered manually. Batch
processing of many images makes
- Location Report: click on table to view
a gallery of images by country, country and
location, or country, location and date-group (groups of
images with nearby dates).
- Timeline Report: click on a calendar
with image counts by month. Click on any
year or month to get an instant gallery of images for that
of geotagged images as red markers
on a map. Click a location to
get a corresponding gallery of
images. Click gallery thumbnails
to view or
maps (huge) for the world and all
may also be used to view any
location in the world at any scale
(works well if you have a good
own custom maps (city, region,
campus, national park ...) which
automatically inherit image
location markers like the other
is standards compliant and usable
with other apps (no
items can be indexed to enable
custom graphic menu in a popup
window. Add your most frequently
used functions and arrange their
layout using the
transitions, pan and zoom, auto or
from the thumbnail gallery
browser, burn a DVD or
graph, updated live with image
rename, resize, copy/move, change
RAW files to JPEG, TIFF (8/16
bits), or PNG (8/16
gallery of recently seen or newest
images, click to view or
of selected images: add, delete,
arrange (drag & drop),
and gamma test images are
(horizontal, vertical, vary
using standard paper formats or
colors and print with improved
files as images and thumbnails
(first frame), click to play
images - rotate viewpoint by
'magnifying glass' around an image
to view any area
ImageMagick, etc. as plug-in edit
functions (minor setup
between English and any of the
- Export utility suited for uploads to
photo sharing web sites.
- Batch utility to set photo date/time or
shift by any amount (e.g. fix the time
- Create a 'script' from multiple edits,
use as an edit function or batch
- Find duplicate images within current
gallery view or entire image collection.
comprehensive user guide is
provided in English.
Fotoxx works best on a strong computer
(4 processor cores, 8+ GB). Weaker
computers may be quite slow or may
to edit very large images. 64-bit
Linux is required. Monitors
used for photo editing should
have accurate color (most do not).
Most image edit functions respond
within 1 second for images up to 20
megapixels on a strong computer. 100
images can be edited on a computer
with 8 GB RAM, 200 megapixels with 16
GB. Some composite functions
may need a minute or more when
combining many large images. Image
search speed is generally below 1
collections up to 200 K images.
Click on the small images to see
a full-size image.
These examples are not useful
on a smart phone (small)
View a large
collection of image files using a thumbnail gallery. Click
on a thumbnail to view or edit a full-size image. Move around
within gallery pages and navigate to other pages. A
gallery may be a folder of image files, the output of an image
search, or an album (ordered set of images). The
thumbnails can be large or small and can be zoomed out to any
scale with the mouse wheel.
Images can have geotags (via camera GPS or manually added). A
scalable world map shows image location markers. Click on
a marker to get a gallery of images, instantly.
Custom Favorites Menu
The Fotoxx menus are large and finding the function you want may
take time. You can put the functions you use most
frequently into a small popup window, and arrange the layout as
desired. The popup is activated with a toolbar icon.
You can use text or icons or both. Drag the menu items with the
mouse to arrange as wanted. The popup window can be
positioned anywhere and left open for convenient access to many
RAW file import
The first image is the JPEG produced by the camera. The 2nd image
is the RAW file from the camera, converted to
TIFF-16. The 3rd image is the edited TIFF file saved as a JPEG
file. The dark areas were lightened and color was
RAW files can be directly opened and edited, or you can use a
batch function to select and convert many RAW files at
once. The speed is 1-2 seconds per file on a strong PC. The
converted files can be JPEG, TIFF (8 or 16 bits per RGB
color), or PNG (8 or 16 bits). All internal editing is done with
24 bits per color.
Add tags (keywords), geotags, titles, captions, dates, and ratings
to images. Search images using these criteria as
well as image file and folder names. Partial matching also works.
Matching images are shown in a thumbnail gallery.
Click a thumbnail to view or edit, or step through sequentially.
Search speed is nearly instantaneous.
Tags, etc. are stored inside the images using EXIF and IPTC
standards. They can be shared with other
standards-compliant photo programs.
Find images with any desired metadata, show thumbnail images with
metadata text. Click a thumbnail to view full-size.
There are also functions to view the key metadata for an image,
view all available metadata, or edit any metadata.
The search speed is almost instantaneous for 'main' (indexed)
speed is slower (a few thousand files per minute) for metadata
that is not indexed and must be read from the image
files. The search speed can still be very fast if some indexed
data is included in the search criteria (e.g. date
range, folder/file names, tags, etc.).
You can optionally add metadata items to the index for fast
Cameras with GPS receivers can add geotags (location and earth
coordinates) to images automatically. Fotoxx also has a
function to find the earth coordinates for a given location (city,
park, monument ...) and add geotags to a bunch of
images at once. If many photos made in one location are located
together in your collection, you can quickly process
all of them. If this work has been done, you can use the following
geotag functions to find and display images from a
given location as a gallery of clickable thumbnails.
Search Images Using Geotags
List image locations: group by country, country/location, or
country/location/date. Click on a list entry to see all
the images in that group as a gallery of thumbnails. The example
here shows 28 photos made in Jan. 2012 at Achensee,
Austria. If listing by dates, you can consolidate dates that are
separated by less than a given number of
Search Images by Clicking on a Map
Click on a map location to instantly see all the photos made in or
around that location. Location names pop up as you
move the mouse over the map. In this case, "Leipzig" was clicked
to retrieve 25 photos of Leipzig.
Search Images Using a Calendar
The calendar report shows image counts by year and month. Click on
any month to get an instant gallery of images for
Edit Selected Object or Area
Little Mermaid was back-lighted. The fix was to select her
and flatten (spread out) her brightness distribution.
Areas are selected using the mouse: freehand draw, follow edges,
or spread into matching tones (color and brightness)
from the mouse position outwards. Edge effects can be blended out.
Copy and Paste Selected Areas
There is a special tool for copying hair and other irregular
shapes. Drag over the area with the mouse, clicking as
needed on colors to be selected or suppressed. This can be tedious
if the background contrast is weak. This example was
difficult because of varying background colors and areas of low
contrast. This example is about a 10 minute project for
an experienced user. Novices will need more time to get the feel
of this tool.
Flatten Brightness Distribution
This tool is an easy way to improve detail in areas that lack
contrast. Uses a single sliding control with live
feedback. Sometimes works miracles and sometimes not very
effective. Good for fog/haze removal.
This tool can be used to restore the full color range for a badly
faded photo or one with an extreme color caste. It
can also be used to add flair to any image. The original and
modified images can be blended in any ratio.
View 360°Panorama Image
This tool is used to view a 360°panorama image. Use the mouse to
rotate the viewpoint through the full
360°. The view
window is 90°(right
image) and can be zoomed-in for a larger/narrower view.
Comparison of different sharpening methods on a blurred image.
The 'gradient' method increases sharpness about as well as the
classic 'unsharp mask' method, but with less "halo"
effect around high-contrast edges. 'Kuwahara' produces excellent
sharpness but small details are lost.
Reduce noise in photos made under low-light conditions.
The original image was scanned from a magazine at 600 dpi.
The results from four noise suppression methods are shown.
Noise can be measured and noise suppression
can be quantitatively evaluated.
Revise Brightness by Editing a Curve
Edit a brightness curve while watching the live output image.
Remove fog and haze with flatten and gradients.
Compensate for radial brightness loss (vignetting), or highlight
some part of the image. Response curve can be
customized, saved and reused. Use the mouse to set the center for
the response curve. Image can be brightened or
darkened, or a color-caste can be added or removed.
The power lines and poles were erased. Select an object to erase
using the mouse like a paintbrush. Click to erase.
Neighboring pixels replace the erased area. This usually works
well for small or narrow areas, or even larger areas
when surrounded with fairly uniform background, like sky or grass.
Selecting long thin objects like power lines is done
by clicking positions along the length.
Remove the dust spots from images made from dusty
scanned slides or old photo prints.
Remove Chromatic Aberration (color fringes)
Click to enlarge and view carefully. The left image is a photo
taken from inside a church (a small cutout of a large
image). It has color fringes on the dark to bright transitions,
and these were mostly eliminated in the edited version
on the right. Slider controls change the scale of individual RGB
color planes, and you simply adjust them to minimize
the color bands. It works for the usual sort of chromatic
aberration which increases radially from the
contrast where it is weak without changing
overall contrast. Details in Niagara Falls have been brought out
from behind the mist, and the cliff has been brought
out from the shadows. Watch the image change as you move a curve
or slider. Response is sub-second on a strong PC for
image sizes up to 20 megapixels.
This one was taken to extremes, giving the impression of an
Tools for Brightness and Contrast
5 methods to change brightness and contrast
HDR - High Dynamic Range Image
The lower image is a composite of the upper ones. Brighter areas
were taken mostly from the darker image, and darker
areas from the brighter image. Image alignment is automatic and
hand-held photos work fine. Optionally use editable
curves to adjust the contribution of each image for each
Gradients tool was added after the images were combined.
The camera was hand-held. The automatic alignment works well
unless the camera is shifted significantly between
The people moved between the photos, so ghosting can be seen.
HDR made from photos having significant camera movement and
Minor changes in image scale are compensated.
HDR was used here to photograph a strongly backlighted scene.
The resulting image was also edited for color and gradients.
HDF - High Depth of Field
Combine multiple photos of the same subject, each having a
different focus distance. The combined image has a depth of
field spanning all the input images. This function is very
sensitive to changes in camera position or aiming point -
these cause parallax errors and changes in image scale that cannot
be fixed with simple translation and rotation. The
software compensates for small errors in scale. If you are careful
not to move the camera too much, you can get good
results. All photos here were hand-held.
This HDF required several minutes of manual work to choose which
input image to use for each area in the output image.
This is done by choosing an image and "painting" with the mouse.
This can take time if there are lots of edges
separating near and far details.
This one was easier because there are no overlaps of near and far
Stack - Noise Suppression
9 photos were made at ISO 1600 in a darkened room with a hand-held
camera. My strong computer needed almost 1 minute to
align and combine them into a low-noise image. This is part of the
10-megapixel image shown at full size.
Stack - Paint
The two images were taken a few seconds apart, during which time
the cyclist (left image) moved out and the red car
(right image, left side) moved in. The images were combined, and
the car and cyclist were removed by choosing one image
or the other and "painting" with the mouse.
Four photos made in quick succession.
Stack - Paint can be used to make transient objects disappear or
make them appear multiple times.
Combine up to four images to make wide-angle images. Rough
alignment is done with the mouse and fine alignment is
automatic. All photos here were hand-held.
Indoor scene with house pet pasted in.
Brightness and color matching was automatic.
3 images with poor camera handling. The final image was
straightened and retouched for brightness and color.
Acropolis closeup. A case where turning the camera with minimal
lateral movement was important for good image
alignment. The guy in the striped shirt moved up the steps between
the two photos, so he is seen twice in the panorama.
The joint can be seen behind his upper image, since no blending
A vertical panorama. Brightness and color matching was automatic.
Photo montage. Add images and text to a background layout of
arbitrary size. Images and text can be moved around using
the mouse, resized, rotated, and made party or wholly transparent.
Transparency can be painted gradually or fully. Text
can have any font, size, and angle. Background, outline and shadow
can be added to text, with adjustable color and
transparency for all of these.
Move around over an image with a simulated magnifying glass.
Diameter and magnification are adjustable.
Sometimes panorama images must be straightened.
Adjust while watching a live output image.
Fix images photographed from an angle, e.g. gallery paintings,
buildings, etc. Select the 4 corners and transform into
Flatten Photo of a Book Page
Flatten the page edges and stretch the squished text where the
page curves down at the center binding. Mark the page
top and bottom edges at several points using the mouse. The rest
Use for retouching. Pick a color from the image or from a palette.
Variable brush size and transparency allow gradual
change without edge effects.
Warp Image, 4 variations
Pull the image with the mouse.
The image behaves like sheet rubber.
Unwarp Close-up Photo (selfie)
Close-up portraits exhibit a "balloon face" distortion.
There is a special function just for this problem.
Straighten her eyes and smooth her skin.
Make Mosaic Image
Make any image into a mosaic with tiles created from your images.
Click on a tile to get a larger popup image which you
can resize and drag. This requires that you have thousands of
images in your collection, with an adequate range of
Click on image to view full size.
Make a Montage
Images can be mixed
sizes. They are rearranged and
resized as needed to make all the columns even.
You can click on any image to get a larger popup image which can
be zoomed to any size, and disappears with another
Add Texture to an Image
Combine texture with gradients and embossing to get interesting
Add Background Pattern
A background pattern
can be added to an entire image or selected areas. The
pattern is a small image file that is repeated to cover a larger
target image. If the pattern repeats, dimensions are
found automatically so that the resulting background pattern is
seamless (left example). The pattern file can be a
photo of a texture, as in the right sample. Pattern size and
opacity are adjustable.
Write text on images. Select font, colors, transparencies, shadow,
angle. Watermarks are made by writing faint text and
Fix a Lousy Photo
The upper photo had multiple retouches to produce the one below.
The functions used were trim/rotate, flatten
brightness distribution, increase contrast, increase color
saturation, and gradients. These were applied in different
areas of the image.
was back-lighted and the Fall colors came out faded. The
following steps were made in sequence: select the sky, invert the
selection (everything but the sky), increase overall
brightness with an upward slope for more contrast, select the
foreground vegetation areas, add more contrast, add color
saturation, add slight gradients.
Select hazy areas, flatten brightness distribution, add color
saturation, add gradients
Convert a photo into a simulated drawing, painting, embossing,
cartoon. These take a few seconds to a few minutes,
depending on how long you want to play with the controls to
optimize the result.
Your Veteran Coder