Picasa
Encyclopedia
Picasa is an image organizer
Image organizer
An image organizer or image management application is application software focused on organizing digital images. Image organizers represent one kind of desktop organizer software applications.- Common image organizers features :...

 and image viewer
Image viewer
An image viewer or image browser is a computer program that can display stored graphical image; it can often handle various graphics file formats...

 for organizing and editing digital photo
Digital photography
Digital photography is a form of photography that uses an array of light sensitive sensors to capture the image focused by the lens, as opposed to an exposure on light sensitive film...

s, plus an integrated photo-sharing
Photo sharing
Photo sharing is the publishing or transfer of a user's digital photos online, thus enabling the user to share them with others . This function is provided through both websites and applications that facilitate the upload and display of images...

 website, originally created by Idealab
Idealab
Idealab is a business incubator based in Pasadena, California.-History:Idealab was founded by Bill Gross in March 1996...

 in 2002 and owned by Google
Google
Google Inc. is an American multinational public corporation invested in Internet search, cloud computing, and advertising technologies. Google hosts and develops a number of Internet-based services and products, and generates profit primarily from advertising through its AdWords program...

 since 2004. "Picasa" is a blend
Blend
In linguistics, a blend is a word formed from parts of two or more other words. These parts are sometimes, but not always, morphemes.-Linguistics:...

 of the name of Spanish painter Pablo Picasso
Pablo Picasso
Pablo Diego José Francisco de Paula Juan Nepomuceno María de los Remedios Cipriano de la Santísima Trinidad Ruiz y Picasso known as Pablo Ruiz Picasso was a Spanish expatriate painter, sculptor, printmaker, ceramicist, and stage designer, one of the greatest and most influential artists of the...

, the phrase mi casa for "my house", and "pic" for pictures (personalized art). In July 2004, Google acquired Picasa and began offering it as a free download
Freeware
Freeware is computer software that is available for use at no cost or for an optional fee, but usually with one or more restricted usage rights. Freeware is in contrast to commercial software, which is typically sold for profit, but might be distributed for a business or commercial purpose in the...

.

Native applications for Windows XP
Windows XP
Windows XP is an operating system produced by Microsoft for use on personal computers, including home and business desktops, laptops and media centers. First released to computer manufacturers on August 24, 2001, it is the second most popular version of Windows, based on installed user base...

, Windows Vista
Windows Vista
Windows Vista is an operating system released in several variations developed by Microsoft for use on personal computers, including home and business desktops, laptops, tablet PCs, and media center PCs...

, Windows 7 and Mac OS X
Mac OS X
Mac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...

 (Intel only) are available through Google Labs
Google Labs
Google Labs was a page created by Google to demonstrate and test new Google projects. Google calls Google Labs,Google also uses an invitation-only phase for trusted testers to test projects including Gmail, Google Calendar and Google Wave and many of these have their own "labs" webpages for...

. For Linux
Linux
Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

, Google has bundled Wine
Wine (software)
Wine is a free software application that aims to allow computer programs written for Microsoft Windows to run on Unix-like operating systems. Wine also provides a software library, known as Winelib, against which developers can compile Windows applications to help port them to Unix-like...

 with the Windows version to create an installation package rather than write a native Linux
Linux
Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

 version, but this version is severely out of date (the latest Windows version, however, can be run with Wine
Wine (software)
Wine is a free software application that aims to allow computer programs written for Microsoft Windows to run on Unix-like operating systems. Wine also provides a software library, known as Winelib, against which developers can compile Windows applications to help port them to Unix-like...

, see Linux section). There is also an iPhoto
IPhoto
iPhoto is a digital photograph manipulation software application developed by Apple Inc. and released with every Macintosh personal computer as part of the iLife suite of digital life management applications...

 plugin or a standalone program for uploading photos available for Mac OS X 10.4 and later.

Windows

As of May 2011, the latest version of Picasa is 3.8, which supports Windows XP, Windows Vista and Windows 7.

Linux

As from about early June 2006, Linux versions (2.2.2820-5) became available as free downloads for most distributions of the Linux
Linux
Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

 operating system. It is not a native Linux program but an adapted Windows version that uses the Wine
Wine (software)
Wine is a free software application that aims to allow computer programs written for Microsoft Windows to run on Unix-like operating systems. Wine also provides a software library, known as Winelib, against which developers can compile Windows applications to help port them to Unix-like...

 libraries.

Google announced that there will be no Linux version for 3.5, due to low adoption. Since at least July 2009, and as of Nov 2010, Google has only officially offered Picasa 3.0 Beta for Linux http://picasa.google.com/linux/.

Linux installation

Further information: Using Picasa 3.8 in Linux


Picasa 3.8 for Windows can be successfully installed and used under Linux through the use of Picasa 3.0 and Wine. This involves merely installing the official Linux v3.0beta version, then downloading the Windows version and running the .exe installer through Wine, then overwriting the v3.0beta install with the Windows install.

Web Album alternatives

There are, however, also other programs that can upload to Picasa Web Albums. GwenView
Gwenview
Gwenview is an image viewer for the KDE Software Compilation desktop environment. The current maintainer is Aurélien Gâteau. The word "Gwen" means "white" in the Breton language and is commonly used as a first name....

 and DigiKam
DigiKam
digiKam is an image organizer and editor using KDE Platform. It runs on most known desktop environments and window managers if the required libraries are installed. It supports all major image file formats, and can organize collections of photographs in directory-based albums, or dynamic albums by...

 can upload to Picasa Web Albums when you install the kipi-plugins package and Shotwell
Shotwell (software)
Shotwell is an image organizer designed to provide personal photo management for the GNOME desktop environment. It has replaced F-Spot as the standard image tool for several GNOME-based Linux distributions, including Fedora in version 13 and Ubuntu in its 10.10 Maverick Meerkat...

 can upload to it without any plugins.

Mac OS X

On 5 January 2009 Google released a beta version of Picasa for Mac (Intel-based Macs only). Also, a plugin is available for iPhoto to upload to the Picasa Web Albums hosting service. There is also a standalone Picasa Web Albums uploading tools for OS X 10.4 or later. The Picasa for Mac is a Google Labs
Google Labs
Google Labs was a page created by Google to demonstrate and test new Google projects. Google calls Google Labs,Google also uses an invitation-only phase for trusted testers to test projects including Gmail, Google Calendar and Google Wave and many of these have their own "labs" webpages for...

 release.

Unfortunately, Picasa for Mac uses the OS X "scroll with inertia" and scrolling speed settings with a high multiplier, making it impossible to configure both Safari/Chrome/Firefox scrolling and Picasa scrolling (in single-picture mode) to be usable at the same time. The thumbnail/gallery view is unaffected.

Organization and editing

For organizing photos, Picasa has file importing and tracking features, as well as tags
Tag (metadata)
In online computer systems terminology, a tag is a non-hierarchical keyword or term assigned to a piece of information . This kind of metadata helps describe an item and allows it to be found again by browsing or searching...

, facial recognition, and collections for further sorting. It also offers several basic photo editing functions, including color enhancement, red eye
Red-eye effect
The red-eye effect in photography is the common appearance of red pupils in color photographs of eyes. It occurs when using a photographic flash very close to the camera lens , in ambient low light. The effect appears in the eyes of humans and animals that have no tapetum lucidum, hence no...

 reduction, and cropping. Other features include slide shows, printing, and image timeline
Chronology
Chronology is the science of arranging events in their order of occurrence in time, such as the use of a timeline or sequence of events. It is also "the determination of the actual temporal sequence of past events".Chronology is part of periodization...

s. Images can also be prepared for external use, such as for e-mailing or printing, by reducing file size and setting up page layouts. There is also integration with online photo printing services. Other simple editing features include adding text to the image. Picasa supports most RAW files
RAW image format
A camera raw image file contains minimally processed data from the image sensor of either a digital camera, image scanner, or motion picture film scanner. Raw files are so named because they are not yet processed and therefore are not ready to be printed or edited with a bitmap graphics editor...

, a user is able to view and edit RAW files and save their finished edit (as JPG, et al) without any changes to the original RAW file.

Keywords

Picasa uses picasa.ini files to keep track of keywords for each image. In addition to this, Picasa attaches IPTC
IPTC Information Interchange Model
The Information Interchange Model is a file structure and set of metadata attributes that can be applied to text, images and other media types...

 keyword data to JPEG
JPEG
In computing, JPEG . The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image quality....

 files, but not to any other file format. Keywords attached to JPEG files in Picasa can be read by other image library software like Adobe Photoshop Album
Adobe Photoshop Album
Adobe Photoshop Album is a software application by Adobe Systems designed to import, organize and edit digital photos, and allows quick and easy searching and sharing of entire photo collections. It has been compared to Apple Inc.'s iPhoto and Google's Picasa....

, Adobe Bridge
Adobe Bridge
Adobe Bridge is an organizational software application created and released by Adobe Systems as a part of the Adobe Creative Suite, beginning with CS2. Its primary purpose is to link the parts of the Creative Suite together using an interface similar to the file browser found in previous versions...

, Adobe Photoshop Lightroom, digiKam
DigiKam
digiKam is an image organizer and editor using KDE Platform. It runs on most known desktop environments and window managers if the required libraries are installed. It supports all major image file formats, and can organize collections of photographs in directory-based albums, or dynamic albums by...

, Aperture
Aperture
In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture of an optical system is the opening that determines the cone angle of a bundle of rays that come to a focus in the image plane. The aperture determines how collimated the admitted rays are,...

, and iPhoto
IPhoto
iPhoto is a digital photograph manipulation software application developed by Apple Inc. and released with every Macintosh personal computer as part of the iLife suite of digital life management applications...

.

According to Picasa Readme, Picasa can parse XMP
Extensible Metadata Platform
The Adobe Extensible Metadata Platform is a standard, created by Adobe Systems Inc., for processing and storing standardized and proprietary information relating to the contents of a file....

 data. However, it cannot search local files for existing XMP keywords.

Searching

Picasa has a search bar that is always visible when viewing the library. Searches are live, so that displayed items are filtered as you type. The search bar will search filenames, captions, tags, folder names, and other metadata.

Picasa also supports boolean operators for searching in much the same way as Google's web search. All search terms are required by default (as with the operator "AND"), and images tagged with specified keywords can be excluded by using the hyphen (as in the boolean operator "NOT"). For example, searching for family children -friends will cause Picasa to display all images with the keywords "family" and "children", but which do not include the keyword "friends".

Picasa also has an experimental feature that allows searching for images that contain certain colors with the "color:" operator.

Viewing

Picasa has no separate view window. There is only an "edit view" with a viewing area. Fullscreen view is available in slideshow mode, by holding down the ctrl+alt keys while in "edit view", or by pressing the Alt Gr key. This feature is also available through the context menu of Windows Explorer, and provides a way to start the Picasa editor as well.

Backup

In Picasa 2 and earlier versions, changes to pictures made in Picasa overwrite the original file, but a backup version of the original is saved in a hidden folder named "Originals" in the same folder as the original picture (.picasaoriginals on Mac OSX) .

In Picasa 3, changes to pictures made in Picasa are saved to a hidden file picasa.ini in the same folder as the original picture. This allows multiple edits to be performed without altering the original image. Viewing the picture in Picasa or using the Picasa Photo Viewer will apply modifications on the fly, whereas viewing through other programs (such as Windows XP's Photo and Fax Viewer) will display the original image. Changes can also be made permanent using the "Save" function, where the original file is backed up in a hidden folder .picasaoriginals located in the same folder as the original picture and the modified version is written in its place.

Further reading: Manual section "Saving photos" on picasa.google.com

Face recognition

On 15 August 2006, Google announced it had acquired Neven
Hartmut Neven
Hartmut Neven is a scientist working in computational neurobiology, robotics and computer vision. He is best known for his work in face and object recognition. He is currently Director of Engineering at Google.- Education :...

 Vision, whose technology can be used to search for features within photos such as people or buildings. Google applied this technology for face recognition, and this functionality was launched on Picasa Web Albums on 2 September 2008.

Neven Vision incorporates several patents specifically centered around face recognition from digital photo and video images.

Geotagging

Since June 2007 Picasa can write geographic coordinates to Exif metadata, thus geotagging
GeoTagging
Geotagging is the process of adding geographical identification metadata to various media such as a geotagged photograph or video, websites, SMS messages, QR Codes or RSS feeds and is a form of geospatial metadata...

 an image.

Since version 3.5 of Picasa, Google Earth is not needed. Geotagging may be done directly inside Picasa, using a more practical Google Maps component, which enables this functionality in the Mac OS X version.

Picasa Web Albums

Picasa Web Albums (PWA) is a photo sharing
Photo sharing
Photo sharing is the publishing or transfer of a user's digital photos online, thus enabling the user to share them with others . This function is provided through both websites and applications that facilitate the upload and display of images...

 web site from Google, often compared to Flickr
Flickr
Flickr is an image hosting and video hosting website, web services suite, and online community that was created by Ludicorp in 2004 and acquired by Yahoo! in 2005. In addition to being a popular website for users to share and embed personal photographs, the service is widely used by bloggers to...

 and similar sites.

It allows users with accounts at Google to store and share 1 GB
Gigabyte
The gigabyte is a multiple of the unit byte for digital information storage. The prefix giga means 109 in the International System of Units , therefore 1 gigabyte is...

 of large photos for free. Storage is unlimited for photos 2048x2048 pixels or smaller for Google+
Google+
Google+ is a social networking and identity service, operated by Google Inc.The service was launched on June 28, 2011, in an invite-only "field testing" phase. The following day, existing users were allowed to invite friends who were over 18 years of age to the service to create their own accounts....

 users, and for photos 800x800 for everyone else. Videos less than 15 minutes long also don't count towards the limit. After the limit is reached, photos are automatically resized.

Users may upload pictures through a variety of ways: via the PWA web interface on supported browsers, Picasa 2.5.0 or later on Microsoft Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

, using the Exporter for iPhoto
IPhoto
iPhoto is a digital photograph manipulation software application developed by Apple Inc. and released with every Macintosh personal computer as part of the iLife suite of digital life management applications...

, the Aperture to Picasa Web Albums plug-in, Uploader on Mac OS X, F-Spot
F-Spot
F-Spot is an image organizer, designed to provide personal photo management for the GNOME desktop environment. The name is a play on the words F-Stop and G-Spot.-Features:...

 on Linux
Linux
Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

, or through WAManager in the Amiga-like OS MorphOS
MorphOS
MorphOS is an Amiga-compatible computer operating system. It is a mixed proprietary and open source OS produced for the Pegasos PowerPC processor based computer, PowerUP accelerator equipped Amiga computers, and a series of Freescale development boards that use the Genesi firmware, including the...

. In both free and paid accounts, the actual resolution of the photo is maintained, even though a smaller resolution photo may be displayed by the web interface.

In Picasa 3 versions of the software , using the 'original size' upload option, pixel size remains the same, but JPEG
JPEG
In computing, JPEG . The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image quality....

 compression is increased significantly during upload to PWA. As JPEG is a "lossy" format, some picture information (and quality) is lost. Picasa 3.6 added an option to preserve original JPEG quality.

PWA uses an "unlisted number" approach for URLs for private photo albums. This enables a user to email a private album's URL to anyone, and the recipient can view the album without having to create a user account. This is done via an "authentication key" that must be appended to the URL for the album to be shown. The Picasa Help files say that private albums are not searchable by anyone except the user. Another visibility option named "sign-in required to view" is available. This makes the album viewable only to those with whom the album is explicitly shared.

Ads are shown on the free Picasa Web Albums accounts. The Terms of Service permit Google to use the uploaded photos to display on their website or via RSS feeds, and also for promoting Google services royalty-free. Additionally, the terms permit Google to allow other companies with which they are affiliated to use the uploaded pictures to provide syndicated services. This allowance is perpetual and cannot be revoked by the owner of the photos.

Picasa Web Albums was first leaked on 6 June 2006. When introduced, it came with 250 MB free space. On 7 March 2007, that was upgraded to 1 GB. As stated above, storage is now unlimited for small and resized photos. Users can also rent additional storage space (shared between Google services such as Gmail
Gmail
Gmail is a free, advertising-supported email service provided by Google. Users may access Gmail as secure webmail, as well via POP3 or IMAP protocols. Gmail was launched as an invitation-only beta release on April 1, 2004 and it became available to the general public on February 7, 2007, though...

 and Picasa Web Albums) from 20 GB to 16 TB.

Hello

Hello by Google's Picasa was a free computer program that enabled users to send images across the Internet and publish them to their blog
Blog
A blog is a type of website or part of a website supposed to be updated with new content from time to time. Blogs are usually maintained by an individual with regular entries of commentary, descriptions of events, or other material such as graphics or video. Entries are commonly displayed in...

s. It was similar to an instant messaging
Instant messaging
Instant Messaging is a form of real-time direct text-based chatting communication in push mode between two or more people using personal computers or other devices, along with shared clients. The user's text is conveyed over a network, such as the Internet...

 program because it allowed users to send text, but Hello focused on digital photographs. Users can opt to view the same pictures as their friends in real-time. One of the advantages claimed at the website is that photos could be shared through firewalls.

Hello's service was canceled at the end of 2006, and users were instructed to try the Picasa 'Blog This' functionality for uploading pictures to their blogs.
According to the official website, the Hello project was shut down on 15 May 2008.

See also

  • Comparison of image viewers
    Comparison of image viewers
    This article presents a comparison of image viewers and image organizers which can be used for image viewing.-General information:Note 1: Adobe Bridge comes included in the price with the Adobe Creative Suite CS2, Adobe Production Studio and Photoshop Elements 4 for Mac OS X...

  • Desktop organizer
    Desktop organizer
    Desktop Organizer software applications are applications that automatically create useful organizational structures from desktop content from heterogeneous types of content including email, files, contacts, companies, RSS news feeds, photos, music and chat sessions...

  • List of Google products
  • List of photo sharing websites

External links

  • Picasa Release Note
  • Anvo-it.de, "AvPicFaceXmpTagger", allows you to store Picasa face recognition data inside JPEG
    JPEG
    In computing, JPEG . The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image quality....

     pictures, the program fetches that data and stores it as XMP-MP
    Extensible Metadata Platform
    The Adobe Extensible Metadata Platform is a standard, created by Adobe Systems Inc., for processing and storing standardized and proprietary information relating to the contents of a file....

    meta tags inside the JPEG pictures.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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