Fotoxx - current release 20.09 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 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, flood 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 guide (at least the first few pages) before jumping in. Fotoxx has deep functionality. Do not expect to master it
in a few minutes.
Fotoxx Demo (YouTube video)
A basic overview of Fotoxx.
Fotoxx Sample Images (YouTube video)
A collection of before/after images edited with Fotoxx.
The latest release can be obtained here: downloads.
Packages for many Linux flavors can be found HERE.
Long Overview (or jump to the examples below)
Fotoxx is a free Linux program for editing photos or other images and managing a large collection. Image directories
(folders) can be viewed as a scrolling gallery of thumbnail images. Navigation of folders and subfolders 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 selected images arranged in a desired
order. Fotoxx has many editing tools that go beyond the basics. Images with severe problems (underexposed, false
colors, blurred, uneven lighting, fog/haze) can be brought back to life. Details lost in shadows or haze can be brought
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 2% to overall storage requirements.
There is no database to manage - the index manages itself.
Fotoxx can 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). Convert single RAW files or selected
Image edit functions are interactive, giving rapid response to adjustments using the full image or a chosen zoom-in
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. filename.v02.jpg).
Objects or areas within an image can be selected and edited separately from the background. Areas can be selected using
several mouse methods: drag to select and flood 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. Selected areas can be copied and pasted
into the same or other images, resized, rotated, brightened, etc. Layers are not used.
Batch functions are available to copy, move, rename, resize, upright, convert format, and add/revise metadata.
Several tools are available to change size and shape: trim (crop), resize, rotate, fix perspective, curve/warp the
whole image 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 binding).
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 focus depths 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 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, embossing,
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, ratings, locations,
and any other metadata stored in the image. Some data is automatic from the camera (date, location, exposure data), and
other data can be manually entered (tags, captions ...). Batch tools are available to load metadata into many images at
once. Search criteria can be used in combination; e.g. find Chicago photos for years 2002-2005 containing tags
"Barbara" or "Barbie".
Locations (from a camera GPS 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 markers on these maps. Click a marker
to get a gallery of the corresponding images, which can be viewed full size or edited. 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 positions.
Slide shows can be prepared. Choose animated transitions between images, pan and zoom effects, and places to auto-pause
Fotoxx includes a comprehensive user manual that also serves as interactive help (press F1 while using a function). You
should take the time to read the overview pages. The function details can be viewed as needed.
- Organize and manage a very large photo/image collection.
- Thumbnail browser/navigator with variable thumb size and metadata view.
- Click thumbnail for full-size view, image zoom in/out and pan/scroll.
- View gallery of recently viewed or edited images, or the newest images.
- RAW file conversion, single or batch, save as TIFF/PNG with 16 bits/color.
- Edit RAW files directly using RawTherapee or the Fotoxx edit functions.
- Internal processing in 24 bits per color (float), output in 8 or 16 bits.
- Edited files are saved with a version number, originals are kept.
- Rapid edit visual feedback using the full image or selected zoom-in area.
- Undo/Redo edits, go back and forth to compare edited versions.
- Large set of functions to edit, repair, enhance, and transform images:
- brightness, color, contrast, trim/crop, rotate, upright, resize, sharpen,
denoise, color saturation and temperature, white and black points ...
- fix vignette and other brightness/color uniformity problems.
- fix chromatic aberration: rescale color planes or erase colored edges.
- Smart Erase (power lines, signs, litter ...)
- Fix red eyes with one click per eye
- Make color adjustments, or match to colors in a reference image.
- Make a black/white or color negative, positive from negative, or sepia.
- Convert the color profile of an image, e.g. Adobe RGB <--> sRGB.
- Warp an image to fix perspective, straighten curves, or for special effects.
- HDR: combine dark/bright images, adjust relative inputs by editing curves.
- HDF: combine near- and far-focus images to get a greater focus depth.
- Suppress noise by combining and averaging multiple high-noise photos.
- Stack multiple versions of an image, select one to expose in each area.
- Panorama: combine 2-4 overlapped images horizontally or vertically
(hand-held photos work OK - some care is needed, but not a tripod).
- Posterize an image (reduce color depth).
- Convert photo to drawing (charcoal, blackboard, colored lines).
- Convert a photo into a cartoon-like drawing.
- Add embossed effect (surface depth, 3D texture).
- Make tiles: any size, with or without borders. Pixelize to obscure a face.
- Dither - four methods for artistic effect, including Roy Lichtenstein dots.
- Simulate a painting: aggregate matching tones into larger patches.
- Paint or unpaint with the mouse, with variable brush size and transparency.
- Add texture to an image background, random or repeating pattern.
- Convert an image into a mosaic using tiles made from image collection.
- Transformations: sphere, twist, stretch, inside-out, tiny planet, Escher spiral.
- Many convolution kernels are supplied. Add custom convolution kernels.
- Blur: ordinary, radial, directed, background only, paint blur using mouse.
- Area Rescale: select an area to freeze and rescale the rest of the image.
- Add text to an image with variable font, size, angle, transparency, shadow.
- Add lines and arrows to an image.
- Most edit functions can be 'painted' locally and gradually using the mouse.
- Select image objects or areas to edit separately from the background:
outline by hand, follow feature edges, 'flood' matching colors ...
- Special selection tool for complex image features (e.g. hair, foliage).
- Copy areas within and across images by mouse painting and blending.
- Create or maintain transparent image areas while editing.
- Mashup: arrange images and text in an arbitrary layout using the mouse.
- Custom scripts: record a series of edits and use as a new edit function.
- Custom favorites menu: select and arrange icons and text in popup window.
- Plugins: use other edit apps (e.g. Gimp) as Fotoxx plug-in edit function.
- Batch tools for renaming, resizing, converting, processing RAW files,
adding/revising/reporting metadata, and executing custom edit scripts.
- Batch utility to set photo date/time or shift by any amount (e.g. fix time zone).
- Metadata edit and report (tags, dates, captions, geotags ... any metadata).
- Show all metadata in a popup window, or a compact report with key items.
- Search images using any metadata and folder/file names or partial names:
dates, tags, locations, ratings, captions, comments, exposure data ...
- Show a table of image locations and date groups, click for image gallery.
- Show an image calendar, click on year or month for a gallery of images.
- Show scalable internet map with markers for image locations.
- Click map markers for gallery of images at location.
- Use locally stored maps: world, continents, nations, cities, custom maps.
- View 360 degree panorama image (Google Street View format).
- Show video files (first frame) in thumbnails, view full size, play video.
- Show animated GIF files (first frame) in thumbnails, play animation.
- Bookmark image locations with a name, jump to bookmark (gallery).
- Find duplicate images within current gallery view or entire image collection.
- Move a 'magnifying glass' around an image to view any area magnified.
- Create albums linking selected images. Arrange by drag and drop.
- Slide show: show album images with animated transitions and pan/zoom.
- Grid Lines (horizontal, vertical, vary count/spacing, shift positions).
- Print an image at any scale. Printer color calibration tool is available.
- Custom keyboard shortcuts can be assigned to most functions.
- Comprehensive user guide and context help popups via F1 key.
The GUI is available in English, Catalan, French, German, Italian, Portuguese, and Spanish. A comprehensive user guide
is provided in English.
Fotoxx needs a strong computer (4 CPU cores, 8+ GB). 64-bit Linux is required. Weaker computers may not work, may be
slow, or may fail to edit large images. The monitor should be at least HD (1920x1080) and have accurate color (most do
Performance and Limitations
Most image edit functions respond within 1 second for images up to 30 megapixels on a strong computer. 100 megapixel
images can be edited on a computer with 8 GB RAM, 200 megapixels with 16 GB. Some composite functions (panorama, HDR)
may need a minute or more when combining many large images. Image search time is generally below 1 second for
collections up to 200K images.
Click on the small images to see a full-size image.
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 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 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) metadata. The speed is slower (a few thousand files per
minute) for metadata that is not indexed and must be read from the image files.
You can optionally add metadata items to the index for fast searching.
Cameras with GPS receivers can add geotags (location name 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 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 center.
Increase contrast where it is weak without changing
Watch the image change as you move a curve or slider.
This one was taken to extremes, giving the impression of an illustration.
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. Optionally use editable curves to
adjust the contribution of each image for each brightness level.
Gradients tool was used after the images were combined.
The camera was hand-held. The automatic alignment works well unless the camera is shifted significantly between shots.
The people moved between the photos, so ghosting can be seen.
HDR made from photos having significant camera movement and rotation.
Minor changes in image scale are compensated.
HDR was used on this photo of 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 details.
Stack - Noise Suppression
9 photos were made at
ISO 1600 in a darkened room with a hand-held camera. My strong computer needed nearly a minute to align and combine
them into a low-noise image. This is part of the 20-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 (house pet was 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 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. paintings, buildings, etc.
Select the 4 corners and transform into a rectangle.
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 automatic.
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 effects.
Add Background Pattern
A background pattern can be added to an image or selected areas. The pattern is
a small image that is repeated to cover a larger area. If the pattern repeats, dimensions are found automatically to
make the pattern seamless (left example). The pattern can be a photo of a texture, as in the right sample. Pattern
scale and opacity are adjustable.
Write text on images. Select font, colors, transparencies, shadow, angle. Watermarks are made by writing faint text and
Lines, arrows, boxes, and circles/ovals can also be added.
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.
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 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.
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