Free hidden picture software for linux

View Picture project is an SDL-based image viewer for Linux and FreeBSD that supports slideshows, fullscreen, zoom, and arbitrary movement through the image list.
Main features:
- HTTP updated to 1.1
- Only hide cursor when fullscreen
- Fixed image count estimate
- configure-time X prefix
- fixed potential buffer overflow issues

Instant Picture Creator is an Image Wrapper written in PHP to produce images on demand for websites. It uses filters, so you can manipulate images in every way by adding own filters. Currently it comes with two basic filters for Resizing images (Example: thumbnails) and Manipulation image colour palette. You can combine filters (like ‘Resize-square-100/Palette-grey’) and it is possible to define Shortcuts (like ‘greythumb’).

Filtered images can be cached, so it is fast and only need some more server time at the first image request.

It doesn’t need a special backend interface, you can manipulate images by a request like http://yourserver.com/picture.png?filter=thumbnail (you don’t need to do it by yourself, it will be done by the first request anyway). In this way you can integrate this mechanism very easy in running websites. You can use it only for one (or more) folder (with images) or you can you use Instant Picture Creator in general for all images on your website. Of cause you also can use it in your backends to prepare thumbnails for uploaded images, etc ...

Currently it supports GIF, PNG and JPEG image types.

Zenith Picture Gallery is a feature-rich picture gallery that organizes uploaded images into searchable categories, creates thumbnails, and stores individual statistics for each one.
Other features of Zenith Picture Gallery include downloadable categories and sub-categories, user accounts and profiles, batch adding via FTP and batch deleting, user comments and ratings, the ability to add languages and skins, the option to rebuild thumbnails, an IP blacklist, and a comprehensive admin control panel that provides access to a great deal of settings and formatting options.
Main features:
- Everything is done from the browser, from installation to configuration.
- Searcheable records by filters.
- Auto-resizing/resampling of images to thumbnails.
- Easy skinning.
- Categories and sub-categories with display permission options.
- User accounts, user profiles, control panels and user types.
- Easy management of languages.
- Blacklist containing IPs of troublesome users.
- Admin CP allows you to define countless settings and formatting options.
- A notice appears in the nav bar to admins when there are pictures, comments or users awaiting approval.
- Batch add pictures via FTP.
- Batch delete pictures.
- Rebuild thumbnails tool.
- Search result and display page addresses are linkable.
- Gallery can be turned on/off.
- Adding pictures can be disabled for guests.
- Sort pictures by Last comments, Most viewed, Top rated.
- ZIP and download pictures.
- User accounts, profiles and pictures can all be managed in the Admin CP.
- Option to receive an email when a picture is submitted.
- 21. Option to allow only registered users to view the gallery.
- 22. Option to set a timezone offset for picture submission dates.
- Categories are mapped to directories in the file structure.
- Users can choose a skin from the ones uploaded.
- Forgot my Password and Resend Activation Email tools.
- Admins can define custom fields for pictures.
- EXIF support.

SPGM is a PHP script that displays picture galleries on the web. It is intended to provide a very simple way to set up online photo albums: creating directories, filling them with pictures and uploading to your website... That is what its all about !
Several cool features are also included, while keeping in mind that the program aims to be as lightweight, simple and portable as possible. Dont expect automatic thumbnail generation, advanced search functions, nor per-gallery full statistics then.
SPGM generates XHTML 1.0 Strict compliant code and makes extensive use of CSS stylesheets to render galleries. It only requires PHP version 4 or higher and does not rely on image manipulation libraries (like GD), or any database system whatsoever.
Main features:
- gallery/picture captioning
- unlimited sub-galleries
- per gallery complete configuration (inheritance supported)
- several sort options for both pictures and galleries
- random/fixed thumbnails used for gallery previews
- new pictures highlighting
- hidden galleries
- EXIF support
- slideshow mode
- easy integration into websites
- multi-language support (29 languages are currently provided)
- flavors (themes) available for use
Enhancements:
- This is a maintenance release that provides various bugfixes and small features.
- People who want to upgrade from previous versions should pay attention to the release notes, as a few configuration files must be updated as well.

Picture Downloader is an app suitable for downloading pictures from websites. Picture Downloader as the name implies is an application written in C-Sharp and Gtk-Sharp made to automate the process of downloading images from websites, Perfect for TGPs.
Right now Picture Downloader is in a very early stage of development , this means bugs are still there and some features are on their way.
Main features:
- Scan HTML code to extract links to images.
- Save pictures to a desired directory.
- Filter type of pictures (jpg, jpeg, gif, png).
- Can download from secure sites (.htacces, .htpasswd).

Hide Menubar is an extension used to hide your Mainmenu Toolbar automatically.

Supports to hide your Mainmenu Toolbar automatically, you can press the ALT key to show it temporarily.

libptp2 is a library used to communicate with PTP devices like still imaging cameras or MP3 players (KODAK mc3).
You can download files or tweak camera properties using ptpcam program boundled with libptp2.
Supported Cameras
The list of cameras implementing PTP is constantly growing. Most (if not all) USB still cameras designed after 2002 are supporting PTP. Below is the list of vendors implementing PTP in their cameras:
- Kodak
- HP
- Nikon
- Canon
- Panasonic
- Olympus
- Konica
- Minolta
- Fuji
- Ricoh
- Sony
More are comming...
Please note that if your camera is supporting PTP it does not mean that it is capable of performing all PTP operations (like trigerring capture, uploading files or tweaking properties). Sony cameras are good example of poor PTP implementation where the only thing you can do is downloading files. Sony even breaks the USB specification assigning all its cameras the same product/vendor IDs so dont buy Sony if you want to stay out of problems.
Currently most PTP features are supported. Uploading/downloading files, taking pictures and setting camera properties is supported as long as your camera supports it. However there are many Vendor Extensions that are not supported.
For example Canon uses some proprietary extension operations to take pictures (entering capture mode, extending lens and so on), Nikon introduces proprietary PTP properties.
Unfortunately I have access to couple of Kodak cameras only so to help support extension features you may send me a patch or donate/lend the camera.
Enhancements:
- A number of bugs were fixed, including leaving the camera in an unpredictable state when an I/O error occurs.
- The projects own reimplementation of the old libusb interface (IOCTL_USB_BULK) is used instead of the new URB interface, which is 20% to 50% slower and sometime leads to I/O errors.
- File time preservation across download was added.
- Better capture support was added.
- A bug that caused files over 2MB to be corrupted while downloading was fixed.
- The --loop-capture feature was added.
- Configure errors and parralel build with make -j were fixed.