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Topic: Aspect ratio (images)

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	Aspect Ratios @ Filmbug UK
		The aspect ratio of an image is its displayed width divided by its height (usually expressed as "x:y").
		Aspect ratios of 2.35:1 or 1.85:1 are frequently used in cinematography, while the aspect ratio of a standard 35mm film frame is around 1.37:1.
		The aspect ratio of a standard 35 millimeter frame is around 1.37:1, although cameramen may use only the part of the frame which will be visible on a television screen (which is 1.33:1 for standard television).
	www.filmbug.co.uk /dictionary/aspect-ratios.php (2224 words)

	Shooting Tips: Aspect Ratio
		Aspect Ratio is the ratio of horizontal to vertical dimensions of an image.
		Because the Aspect Ratio of the print size is equal to the Aspect Ratio of the negative, no cropping of the image occurs.
		Therefore, if you crop a digital image using an aspect ratio that is not equal to a 4x6 print, you may end up with a white border on the sides of your print.
	www.cordcamera.com /callme.asp?callid=CUTDigiBorders (561 words)

	DivXLand - Aspect Ratios Explained
		For instance, the aspect ratio of a traditional television screen is 4:3, or 1.33:1.
		Aspect ratios of 2.39:1 or 1.85:1 are normally used for movies, while the aspect ratio of a full 35 mm film frame with soundtrack (known as 'Academy standard') is around 1.37:1.
		Wider ratios such as 1.85:1 and 2.39:1 are accommodated within the 16:9 DVD frame by adding some additional masking within the image itself.
	www.divxland.org /aspect_ratios.php (755 words)

	Aspect ratio - MythTV
		Aspect ratio is the ratio of the width of an image to its height.
		When working with aspect ratios and television, it's important to remember that there are more than one of them involved: the AR of the original program, that of the broadcast, and that of your set.
		The topic of Aspect Ratio, which is the ratio of picture width to height, is one of the most complicated issues the Myth Boxer is likely to face, and this is mostly because there are things no one talks about.
	www.mythtv.org /wiki/index.php/Aspect_ratio (903 words)

	Aspect Ratio and Image Cut-Off
		In motion pictures, image cut-off begins in projection: all projector apertures, regardless of film width, are slightly smaller all around than camera aperatures, to avoid projecting unexposed areas of the original camera film, and to mask any bits of dust, dirt or hairs that may cling to the edges of the camera aperture.
		In television, image cut-off begins when a transfer is made from film to the electronic medium with its fixed aspect ratios, namely 4x3 and the new HDTV 16x9 A/R. This is done so that, again, any bits of dust, dirt or hairs that may cling to the edges of the camera aperture are not scanned.
		The problem of elongating the aspect ratio of flat films so that their screen proportion would approximate that of CinemaScope was solved by reducing the height of the projected image, using a shorter focal length projection lens and blowing up the picture onto a larger screen.
	www.tech-notes.tv /Jim/Articles/Cut-Off.html (2643 words)

	Aspect Ratio
		The aspect ratio started out 2.66:1 but was reduced to 2.55:1 when the addition of sound tracks on the film.
		Another aspect ratio from Panavision is the 1.85:1 or known as 16x9, and is the standard set for HDTV.
		Another Example: On the left Lost World in its original Widescreen aspect ratio of 1.85:1 which means the screen is 1.85 times wider than its height, and on the right is an example of the Pan and Scan version, with the aspect ratio of 1.33:1.
	www.geocities.com /SiliconValley/Bay/2933/favaspectratio.html (1025 words)

	DTV Aspect Ratio Signaling
		In the United States, television had one aspect ratio 4:3 –; and the FCC regulations on vertical and horizontal blanking made it mandatory that the screen be filled with picture.
		It is the native aspect ratio of all HDTV formats and it became established as a standard-definition aspect ratio as well, particularly in Europe.
		The 14:9 aspect ratio, a compromise that produces "equal pain" when boxed in 4:3 or 16:9, is a development of the BBC that has not found favor here.
	www.tvtechnology.com /features/Tech-Corner/f-rh-aspect-ratio.shtml (1005 words)

	Match the aspect ratio of your photos to your prints \| DigicamGuides.com
		The aspect ratio of a digital photograph is the relationship between the width and height of the photograph.
		Since the aspect ratio of the camera matches the ratio of the print, no parts of your photos will get cropped when they are printed.
		When the aspect ratio of your camera does not match the ratio of the print, crop the image yourself before you send it to be printed.
	www.digicamguides.com /print/aspect-ratio.html (675 words)

	CCD Camera Aspect Ratio Resampling
		Notice the "squashed" distortion of the image because the aspect ratio is not 1 to 1.
		Aspect ratio is corrected to 1 to 1 by resampling the image on the left to the width of 187 pixels.
		This results in a image that is 187 25.5 um-wide pixels by 252 25.5 um-high pixels.
	www.stargazing.net /david/ccd/aspect_ratio.html (289 words)

	efg's Image Processing -- Aspect Ratio
		The ratio of a picture's width-to-height is known as its aspect ratio.
		An image with an aspect ratio greater than 1, is called a "landscape" image.
		When the aspect ratio is fixed when the bitmap is stretched, part of the new bitmap may not be filled with the original bitmap.
	www.efg2.com /Lab/ImageProcessing/AspectRatio.htm (1050 words)

	Digital TV: A Cringley Crash Course -- A Different Aspect
		The aspect ratio of your old TV is 4 :3, which means it's a little wider than it is taller.
		The current aspect aspect ratio used for television was originally developed by W.K.L. Dickson in 1889 while he was working at Thomas Edison's laboratories.
		This film size, and its aspect ratio, became the standard for the film and motion-picture industry because there was no apparent reason to change.
	www.pbs.org /opb/crashcourse/aspect_ratio (249 words)

	VTV Aspect Ratio (Site not responding. Last check: 2007-10-12)
		Either way, the aspect ratio, based on image display dimensions (not pixels) is as close as anyone (a variance of 2-4%) could ask to the 3:2 standard, no matter how computed.
		The average size of the screen-capture images I have is 54 x 38 mm or a ratio of 1.42.
		Given the 3:2 aspect ratio of the NBTVA format, the image width should be 0.80 inches.
	taggart.glg.msu.edu /ICH/vtvar.htm (1243 words)

	6.0 Image Aspect Ratio (Site not responding. Last check: 2007-10-12)
		Aspect Ratio here refers to the height/width ratio of the area represented by a pixel.
		Digital images used for measurements (lengths, areas, aspect ratios, angles, etc.) should have an aspect ratio of 1:1, in other words the pixels should be 'square'.
		When a round object was 'digitized' with such a system, it looked round on the screen of the frame grabber (a normal TV screen where the pixels had a 3:4 aspect ratio), but when the image was viewed on a Mac which has square pixels, the round object looked like an ellipse.
	www.nist.gov /lispix/imlab/AspectR/aspect.html (268 words)

	The Letterbox and Widescreen Advocacy Page
		The original filming was done in an aspect ratio of 2.2:1; however, during the printing to 70mm film, the aspect ratio ended up being closer to a 2.35:1 aspect ratio.
		The entire 1.5:1 image area was then either optically unsqueezed to 70mm yielding a 2.21:1 aspect ratio, or given an additional squeeze to 35mm 2.35:1 4-perforated (four sprocket holes per frame) Panavision.
		The Academy ratio (1.37:1 before a soundtrack was incorporated onto the film) was the primary original aspect ratio.
	www.widescreen.org /aspect_ratios.shtml (1444 words)

	What is aspect ratio?
		Coming to greater details we can define that the aspect ratio is the relationship between the width of an image with respect to its height or rather it can also be defined as the ratio between the horizontal to vertical dimensions of the image or picture.
		Sound is one of the aspects which might have the greatest impact in a video, although sometimes it is a factor to which we do not pay much attention while recording.
		When viewing or capturing images on the digital camera the idea of outputting them to a printer or other output device should be ensured with the perfection of gamma settings of adjusted correctly.
	www.snapjunky.com /digicam-basics/what-is-aspect-ratio.shtml (1324 words)

	CNET's quick guide to aspect ratio - HDTV World - CNET.com
		The concept is simple enough: aspect ratio is the fractional relation of the width of a video image compared to its height.
		On the other hand, 16:9 is the native aspect ratio of most HDTV programming; it is 78 percent wider than it is tall, or fully one-third wider than 4:3.
		At comparable screen sizes, the wide-screen image is a distinct improvement: it offers a larger image, and the horizontal orientation is more akin to how your eyes--next to each other, not on top of one another--view objects.
	www.cnet.com /4520-7874_1-5140690-1.html (971 words)

	mir DMG: Aspect Ratios and Frame Sizes
		A non-square pixel has an aspect ratio W:H where W and H are not equal.
		Note also that all the non-square pixel aspect ratios are derived in some way from the CCIR-Rec.601 ratios (via some combination of 3:4 and/or 2:3 to account for widescreen and/or SVCD).
		According to Aho (see References), they have an aspect ratio of 768:767, which is very close to 1:1, but which is not truly exactly 1:1.
	www.mir.com /DMG/aspect.html (1196 words)

	PhotoNotes.org Dictionary - Aspect ratio
		The ratio of height to width of a rectangle.
		Images with a wide aspect ratio are wider than they are tall.
		Images with a tall aspect ratio are taller than they are wide.
	photonotes.org /cgi-bin/entry.pl?id=Aspectratio (214 words)

	Articles > The "Academy" Ratio
		Why the original 4:3 aspect ratio was chosen from the very earliest stage of motion picture development remains something of a puzzle.
		Although the 4:3 ratio had been used often for 19th Century lantern slides and photographs, there was no "standardized" format at that time.
		When the new optical sound track was put alongside the image on the motion picture film, the width of the area available for the image was decreased, and the 4:3 aspect ratio could no longer be maintained.
	www.pictureshowman.com /articles_technology_ratio.cfm (406 words)

	VideoHelp.com Forum Archive - Images and Aspect Ratio
		When "Maintain Aspect" is not selected, and "Lock aspect ratio" is not selected, the result is: Vertically oriented images that don't fit the width of the screen get stretched to the width of the screen, abnormally.
		When "Maintain Aspect" is selected, and "Lock aspect ratio" is selected, the result is: A frustrating fl bar of pointless fl space on each side of all images, resulting in slightly slimmer wide photos, and slightly slimmer vertically oriented photos too.
		To have the vertically oriented photos maintain their aspect ratio and the wide ones as well, without those annoying fl sidebars.
	www.videohelp.com /forum/archive/t220476.html (279 words)

	Aspect ratio
		Aspect ratio is the relationship of the width of an image to its height, of its horizontal to vertical dimensions.
		Some digital cameras let you select an aspect ratio that matches standard print sizes, such as 4x6." For digital cameras without this setting, you'll have to crop images to the desired aspect ratio with editing software.
		Few have as many pre-set sizes as FastStone Image Viewer (illustrated), an image browser and editor that is free for home users.
	www.digicamhelp.com /processing-photos/printing/aspect-ratio.php (204 words)

	Maintain Image Aspect ratio at runtime - Indigo Rose Software Forums
		I'm guessing the Maintain aspect ratio for images is only for the design environment.
		One suggestion which falls off the beaten path is using javascript pop-ups too, I love 'em for image display and it's a cinch to have them resize to a picture at runtime dynamically, so you don't even have to know what size your images are to use them.
		As for keeping aspect ratio at runtime I would probably get the image size dynamically and then calculate the aspect ration by dividing the y into the x and then resizing my image according to that ratio, i.e.
	www.indigorose.com /forums/showthread.php?p=28453 (743 words)

	Loading Dynamic Images, Preserving Aspect Ratio - ActionScript.org Forums
		From what I've picked up, it seems that Flash does not recognise that new images are being loaded and does not treat each one as a new object and therefore does not change the scaleMode, but I'm not sure.
		First is knowing the image sizes before any actions take place and then 2nd,what to do about images where the width is greater than the height and 3rd, those images where the height is greater than the width.
		For fear is nought but the surrender of the helps that come from reason; and the more one's expectation is of itself uncertain, the more one makes of not knowing the cause that brings on torment.
	www.actionscript.org /forums/showthread.php3?t=79988 (503 words)

	ReAspect, change aspect of images without losing quality
		If the original image had 480 lines, after cropping it to 16:9 you will have only 360 lines, but more importantly part of the visible image is lost.
		If you stretch the image, then you are reusing all the pixels, but the result has incorrect aspect ratio - image looks "fat".
		You should also use this format if you want to edit the image later in Image editing application since the aspect of the image is set for viewing on computer monitor.
	www.mediachance.com /dvdlab/reaspect.html (950 words)

	Projector People : Aspect Ratios
		In case you aren't familiar with the term, "aspect ratio" means the number of units wide by the number of units high of your display.
		Those two aspect ratios are 4:3 format (like the televisions and monitors most of us use) and 16:9 (also known as widescreen) format.
		Unless you limit the type of material to one aspect ratio or the other, there has to be a tradeoff with either the 4:3 or the 16:9 options.
	www.projectorpeople.com /goto.asp?id=2490 (743 words)

	Aspect ratio (image) - Wikipedia, the free encyclopedia
		Also standard ratio for IMAX and MPEG-2 video compression.
		Also used as one of the variable anamorphic ratios with SuperScope.
		This is not a problem in countries where the 625 line television standard is used (usually with PAL colour), because this standard has provision for a pair of pulses contained within the video signal.
	en.wikipedia.org /wiki/Aspect_ratio_(image) (2039 words)

	MPEG Still Images
		This means that the display aspect ratio (which refers to the proportion of the width to the length of the screen) is directly proportional to the height and width in pixels.
		The aspect ratio on a standard TV is 4:3 (1.33).
		This aspect ratio issue isn't perceptually obvious to some people, but it is to others.
	www.geocities.com /medinotes/vcd/mpeg_still_images.html (1555 words)

	Aspect Ratio - Henninger Media Services (Site not responding. Last check: 2007-10-12)
		Theater screens were twice as wide as they were tall and the images created for them had to match the display expectation.
		These days, we're likely to encounter one of the two aspect ratios and have the need to display them on a screen of the wrong type.
		Eggth image courtesy of the Image Science and Analysis Laboratory, NASA Johnson Space Center.
	www.henninger.com /edit/aspectratio/index.nclk (439 words)

	Howstuffworks "How Video Formatting Works"
		Theatrical movies are filmed using several different aspect ratios, almost all of which are somewhat wider than a television screen.
		As you can see, while a television screen is fairly close to a square, a movie picture with a 2.35:1 aspect ratio is more than twice as wide as it is high.
		We'll also look at why televisions and theatrical movies have different aspect ratios in the first place and explore the "widescreen vs. pan and scan" debate.
	entertainment.howstuffworks.com /video-format.htm (494 words)

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