Your digital video camera may have the ability to record video in several different aspect ratios. This setting may adversely affect video analysis in Logger Pro<\/i> software and Vernier Video Analysis.<\/p>\n
First a review of Vernier\u2019s video analysis features: During video analysis, Logger Pro<\/i> and Vernier Video Analysis record the x and y coordinates of points on a video. These coordinates are initially recorded in screen pixels. Setting the scale allows our video analysis software to convert pixels to a physical unit such as meters. Logger Pro<\/i> and Vernier Video Analysis assume that the video pixels are square so that the conversion process applies to the analysis of both horizontal and vertical motion.<\/p>\n
Your digital video camera may have the ability to change the aspect ratio. For example the default ratio might be 4:3, but you might be able to set it to 16:9, or widescreen. It may turn out that changing to a different aspect ratio alters the pixel dimensions in your video, and the resulting pixels may not be square. The video will rely on the display device, such as a widescreen monitor, to correct for the non-square pixels. The expansion of pixels is called \u201canamorphic\u201d correction. When viewed on a computer, the widescreen video may be compressed horizontally into a standard square-pixel, 4:3 aspect ratio image. If this happens, quantitative two-dimensional video analysis will be impossible. A simple test will let you know if this is happening when you switch aspect ratios. Set your camera to the new aspect ratio and record a video of a square object such as a piece of paper. Import the recorded video to your computer and view it using a video player, Logger Pro<\/i> software, or Vernier Video Analysis app. Does the object remained square? If it did not, you cannot use this aspect ratio setting when recording videos for video analysis.<\/p>\n Your digital video camera may have the ability to record video in several different aspect ratios. This setting may adversely affect video analysis in Logger…<\/p>\n","protected":false},"author":8976,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[1576,1575,1578,1577,1335],"class_list":["post-1300","post","type-post","status-publish","format-standard","hentry","tag-anamorphic","tag-aspect-ratio","tag-pixels","tag-squeeze","tag-video-analysis"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/1300","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/users\/8976"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/comments?post=1300"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/1300\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=1300"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=1300"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=1300"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Related Links<\/h3>\n
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