Fotoxx - current release 17.08.2 Deutsch Español
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
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, select 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 please read the user manual (at least the first
few pages) before jumping
This video provides a basic understanding of
how Fotoxx works.
Fotoxx can be downloaded from many places. Watch
out for very old releases.
The latest release is here: downloads.
Packages for some other Linux
Instructions for Fedora:
Packages for OpenSUSE: https://software.opensuse.org/package/fotoxx
Long Overview (or skip
the verbiage and scroll down to the examples below)
Fotoxx is a free Linux program for editing photos or other
images and managing a large
Image directories (folders) can be viewed as a
scrolling gallery of thumbnail images. Navigating directories and
subdirectories is simple and fast. Click on a thumbnail for a full
window view of the image. The image can be zoomed, panned and
scrolled using the mouse. Gallery thumbnails can vary from small to
huge. Popup windows can be used to view multiple images at any
scale. Galleries are also used to display image search results and
albums. Albums are ordered collections of selected
Fotoxx has many editing tools that go beyond the basics. Images
with severe problems (underexposed, false colors, blurred, uneven
lighting, hazy/foggy background) can be brought back to life.
Details lost in shadows or haze can be brought out.
Fotoxx is standards compliant.
Nothing done by Fotoxx makes your images less usable with other
applications. Fotoxx uses your image files wherever they are: they
are not moved or duplicated. Fotoxx does create an index for fast
image searching, and thumbnail images for fast gallery displays.
These add typically 1-2% to overall storage requirements.
Fotoxx can import RAW images and
perform all processing in deep color (24 bits per color used
internally). Edited images can be saved as JPEG, TIFF (8/16
bits/color), or PNG (8/16 bits).
Image edit 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 file versions.
Objects or areas within an image can be selected and edited
separately (select by matching tones, following edges, or freehand
draw). There are no layers - results are seen instantly in the
edited areas. Selected areas can be copied and pasted into other
images, resized, turned, brightened, etc.
Batch functions are available to
copy, move, rename, resize, upright, convert format, and add/revise
Several tools are available to
change size and shape: crop, resize, rotate, fix perspective,
flatten curved book pages, curve/warp the whole image or selected
areas within the image.
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 overlaps and
Fotoxx has a batch edit 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
Artistic effects are available to
convert a photo into a line drawing, sketch, painting, embossing,
cartoon, dot image, or mosaic. Background patterns can be added;
e.g. the texture of artist's linen.
Images can be rapidly searched using file and folder names, dates,
assigned tags, ratings and other data stored in the image metadata,
from the camera or manually
All search criteria can be used in
combination; e.g. find Chicago photos for years 2002-2005
containing tags "Barbara" or
Locations (from a camera GPS
receiver or entered manually) can also be searched. You can view a
map of any region in the world, at any scale, using an internet map
service. Images having location data show as red dots on these
maps. You can click the dots to get a gallery display of the
can be viewed full size or
Local map 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 map, where you can find other photos from the same or nearby
Slide shows can be prepared. Choose animated transitions between
images, pan and zoom effects, and places to auto-pause for
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 for reference.
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. No layers.
- 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, pasted,
resized, rotated, edited.
- Zoom in/out with mouse clicks or mouse
wheel. Edit zoomed image.
- Scroll/pan a zoomed image by dragging the
- 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
Internal edit calculations use
the 'float' number type (24 bits per
Brightness/color/contrast curves: drag
curves using the mouse while
watching a live image (sub-second response on a strong
Remove color castes, even if they vary
One-click white balance or black level
Color temperature adjustment with a slider
Sharpen, Blur, Noise reduction (several
Red-eye removal: usually 1 click each, with
backup method for hard
Expand and/or flatten brightness
distribution to enhance
Tone Mapping (change contrast distribution
Fix brightness uniformity problems
Smart erase: remove power lines, ground
litter, etc. from
Anti-Alias: suppress pixelation (jagged
edges) in low resolution
Remove dark spots on images from dusty
scanned slides or old
Make calibrated color adjustments or match
Find and fix hot/dark pixels (from camera
Remove chromatic aberration (color fringes)
by rescaling RGB color
Edit individual pixels or small areas using
Clone: paint over unwanted objects with
background taken from
Retouch functions can be
"Paint" most retouch functions locally and
gradually using the
Trim (crop): drag a mask or directly set
desired size and aspect
Resize: use 1/2, 2/3 etc. or set desired
size. Lock or change aspect
Rotate in 90 degree steps or use any angle.
Level by dragging the image
Flip (mirror) horizontal or
Make a black/white or color negative, or
Convert the color profile of an image, e.g.
Adobe RGB <-->
Convert to black/white with sepia tint
Write text on image: adjustable font,
color, transparency, angle,
Warp an image to fix perspective,
straighten curves, or for special
Flatten a photo of a curved page from a
thick book, stretch squished
HDR: combine dark/bright images, adjust
relative inputs by dragging
HDF: combine near- and far-focus images to
get a greater focus
Suppress noise by combining and averaging
Remove transient people or cars: combine
photos from different
Panorama: combine 2-4 overlapped images
horizontally or vertically
(hand-held photos work OK (some care is needed, but not a
Mashup (photo-montage): arrange images and
text on a background, move around
with the mouse, adjust size, angle, transparency, font and font
Posterize an image (reduce color
Convert photo to drawing (charcoal,
Add embossing effect (surface depth, 3D
Make tiles: any size, with or without
borders. Pixelate to obscure a
Roy Lichtenstein effect: convert an image
into a matrix of
Simulate a painting: aggregate adjacent
matching tones into larger
Paint or unpaint using the mouse, with
variable brush size and
Convert a photo into a cartoon-like
Add texture to an image background, random
Convert an image into a mosaic using tiles
made from your image
Convert an image into a spherical
Many image transform kernels are supplied.
Edit and add custom
Select foreground topic and blur the
Show all metadata in a popup window, or a
compact report with key
Search and report any metadata, show
thumbnail gallery with
Edit tags, geotags (location data),
ratings, comments, captions ... any
Search images using these criteria plus
folder/file names (also partial
Search output is a thumbnail gallery.
Search speed is nearly
Manage tags: create, delete, group into
categories for easy
Geotags (earth coordinates and location
names) may come from a camera GPS
or be entered manually. Batch processing of many images makes this
- 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 time
View locations of geotagged images as red
markers on a map. Click a location to
get a corresponding gallery of images. Click gallery thumbnails to
Locally stored maps (huge) for the world
and all continents are
Web maps may also be used to view any
location in the world at any scale
(works well if you have a good internet
Create your own custom maps (city, region,
campus, national park ...) which
automatically inherit image location markers like the other
Fotoxx metadata is standards compliant and
usable with other apps (no
Build a custom graphic menu in a popup
window. Add your most frequently
used functions and arrange their layout using the
Slide-show mode: arty transitions, optional
keyboard control, zoom
Select images from the thumbnail gallery
browser, burn a DVD or
Brightness distribution graph, updated live
Batch functions: rename, resize, copy/move,
change format, revise
Batch convert RAW files to JPEG, TIFF (8/16
bits), or PNG (8/16
View thumbnail gallery of recently seen or
newest images, click thumbnail to
Build albums of selected images: add,
delete, arrange (drag & drop),
Monitor color/contrast and gamma test
Grid Lines (horizontal, vertical, vary
Print images using standard paper formats
View video files as images and thumbnails
(first frame), click to play
Calibrate printer colors and print with
Move a simulated magnifying glass around an
image to view any area at full
Use Gimp, ImageMagick, etc. as plug-in edit
functions (minor setup
Switch GUI between English and any of the
- Batch edit: record edits made to one
image and apply to multiple images.
- Export utility suited for upload to photo
sharing web sites.
The GUI is available in English, Catalan,
French, German, Italian, Portuguese,
A comprehensive user guide is provided in English. If
you can help with translations, see the topic Translations
in the User Guide. This is technically easy but would require
several days of work: there are over 1200 text strings to
Fotoxx works best on a strong PC (2+ processor cores, 8+ GB).
Weaker computers may be quite slow or may fail to edit very
large images. 64-bit Linux is required.
Monitors used for photo editing should be at least HD in size
and have good color accuracy (most do not).
Performance and Limitations
Most image edit functions respond within a second on a strong PC
and for images up to 20 megapixels. 100 megapixel images can be
processed on a PC with 8+ GB RAM. Some composite functions
(panorama, HDR) may need a minute or more when combining many large
images. Search speed is generally below 2 seconds for collections
up to 200,000 images.
Click on the small images to see a
These examples are not very
useful on a smart phone (small) screen.
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 directory (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 functions.
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 slightly increased.
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
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 directory 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 thousands of
images per second. 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 slower (around
100 images per second) 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.).
Newer 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
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 days.
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 has image counts by year and month. Click on any month
to get an instant gallery of images for that month.
Edit Selected Object or Area
Little Mermaid was backlighted. The fix was to select her and
flatten (spread out) her brightness distribution. Areas are
selected using the mouse: freehand draw, follow edges, or select
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 was about
a 10 minute project for an experienced user, but 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
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
more 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
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
Remove fog and haze with flatten and tone mapping.
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
The power lines and roadside trash were replaced with neighboring
pixels. 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 areas, or even larger areas
when surrounded with fairly uniform background, like sky or
Remove the dark spots from images made from dusty scanned slides or
old images. This example has dust with at least 3 different
characteristics - gray on bright (boat), dark on bright (pier), and
dark on dark background (lake). Three iterations were used to
select each of these dust types. Removal rate is not 100% but close
Remove Unwanted Objects
Erase printing, erase branch in foreground.
Improve color and contrast.
Remove Chromatic Aberration (color
Click to enlarge and view carefully. The left image is a photo
taken from inside a church (a small part 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
Increase contrast where it is weak without changing
overall contrast. Details in Niagra 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
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 in each brightness region.
Tone mapping was added after the images were combined.
The people moved between the photos, so ghosting can be
HDR made from photos having significant camera movement and
rotation. 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 correction and tone
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
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 PC 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 was done.
A vertical panorama. Brightness and color matching was
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 also 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
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 a
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 is
Use for retouching. Pick a color from the image or from a palette.
Variable brush size and transparency allow gradual change without
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 available colors.
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 click.
Add Texture to an Image
Combine texture with tone mapping 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
tone mapping. These were applied in different areas of the
The photo 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 tone-mapping.
Select hazy areas, flatten brightness distribution, add color
saturation, add tone mapping.
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
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