Forums
New posts
Search forums
What's new
New posts
New media
New media comments
New profile posts
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Nikon DSLR Cameras
D5200
Normal vs. Fine quality
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="WayneF" data-source="post: 175634" data-attributes="member: 12496"><p>It is the same number of pixels, but Normal is never clearer than Fine. The quality is not always the same.</p><p>Some would argue Fine JPG is none too good. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>The D5200 image is 24 megapixels. There are three bytes of red, green, blue data for every pixel, so that is 24x3 = 72 million bytes (uncompressed, in computer memory). That is simply how large the image is, 24 megapixels and 72 million bytes (about 68 MB).</p><p></p><p>When stored in the JPG file, </p><p>Fine JPG compression squeezes this down to 12.2 MB (D5200 manual, page 241 says typical),</p><p>which is to 12/72 = 17% of original size.</p><p></p><p>Normal JPG compression squeezes this down to 6.2 MB,</p><p>which is 6/72 = 8% of original size.</p><p></p><p>This is lossy compression, meaning to be able to do this, the process has to take liberties with the data to be able to do it. Then, when taking them out of the JPG file (uncompressing), we get back the same number of pixels, but they may not be quite the same color that we thought we put into the JPG file. The color variations is the detail of the image. So this data loss is image quality losses. It can cause visible artifacts (you could say distortion, of the colors, and the detail).</p><p></p><p>Why would we spend the price, and then choose image quality losses?</p><p></p><p>See <a href="http://www.scantips.com/basics09b.html" target="_blank">What does JPG Quality Losses Mean?</a> for more about JPG artifacts.</p></blockquote><p></p>
[QUOTE="WayneF, post: 175634, member: 12496"] It is the same number of pixels, but Normal is never clearer than Fine. The quality is not always the same. Some would argue Fine JPG is none too good. :) The D5200 image is 24 megapixels. There are three bytes of red, green, blue data for every pixel, so that is 24x3 = 72 million bytes (uncompressed, in computer memory). That is simply how large the image is, 24 megapixels and 72 million bytes (about 68 MB). When stored in the JPG file, Fine JPG compression squeezes this down to 12.2 MB (D5200 manual, page 241 says typical), which is to 12/72 = 17% of original size. Normal JPG compression squeezes this down to 6.2 MB, which is 6/72 = 8% of original size. This is lossy compression, meaning to be able to do this, the process has to take liberties with the data to be able to do it. Then, when taking them out of the JPG file (uncompressing), we get back the same number of pixels, but they may not be quite the same color that we thought we put into the JPG file. The color variations is the detail of the image. So this data loss is image quality losses. It can cause visible artifacts (you could say distortion, of the colors, and the detail). Why would we spend the price, and then choose image quality losses? See [URL="http://www.scantips.com/basics09b.html"]What does JPG Quality Losses Mean?[/URL] for more about JPG artifacts. [/QUOTE]
Verification
Post reply
Forums
Nikon DSLR Cameras
D5200
Normal vs. Fine quality
Top