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Nikon DSLR Cameras
D5200
Normal vs. Fine quality
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<blockquote data-quote="Horoscope Fish" data-source="post: 175963" data-attributes="member: 13090"><p>This is not correct. </p><p></p><p>Each pixel is made up of three <em>color channels</em>: Red, Green and Blue. This has nothing to do with image size or resultant file size. While the size of the pixel itself can vary, it will always be composed of these three color channels. Always always.</p><p></p><p>The JPG image format uses 8-bit color which means each color channel (R, G & B) is allotted 256 shades for that particular channel: 256 shades of Red, 256 shades of Green and 256 shades of Blue. Doing the math we see: 256 x 256 x 256 = 16.8 million (rounding up slightly). This is the total number of colors (16.8 million) any .JPG file can display. Ever. It's the limit of the file format. This number sounds impressive until you realize that most of our digital camera's are CAPABLE of 12 or 14 bit color (but *only* when shooting RAW). 12-Bit color renders 67 <em>million</em> shades of color, or <em>four times</em> as much as 8 bit color. I don't remember the numbers for 14-bit color and I don't want to do the math. </p><p></p><p>Aaaaaaaanyway... Back to image size vs. file size.</p><p></p><p><strong>Image</strong> size (aka "resolution") is dictated by the total number of pixels used to create the image. To calculate the megapixel size of an image you need to take the number of pixels wide and multiply it by the number of pixels tall. The resulting number, rounded to the nearest million, is the image's size in megapixels. That being said, I can record JPG's as small as 6MP on my D7100 (JPG Small = 2992 x 2000) or as large as 24MP (6000 x 4000). The D5200 can do the same thing, although the dimensions of the image are probably different. </p><p></p><p><strong>File</strong> size (aka "how much space the file takes up on your hard drive") will be dependent on the number of MP's used to create the image but also on compression, if applied. RAW files are un-compressed, as are .TIFF files, which is why they are so much larger (in megabytes) as compared to .JPG files of the same mega-pixel size. This is because JPG is a compressed format that analyzes images in blocks of 8X8 pixels and selectively reduces the detail within each block to reduce file size.</p><p></p><p>I hope that helps to clarify things a little.</p><p></p><p></p><p></p><p><span style="color: #FFFFFF">.....</span></p></blockquote><p></p>
[QUOTE="Horoscope Fish, post: 175963, member: 13090"] This is not correct. Each pixel is made up of three [i]color channels[/i]: Red, Green and Blue. This has nothing to do with image size or resultant file size. While the size of the pixel itself can vary, it will always be composed of these three color channels. Always always. The JPG image format uses 8-bit color which means each color channel (R, G & B) is allotted 256 shades for that particular channel: 256 shades of Red, 256 shades of Green and 256 shades of Blue. Doing the math we see: 256 x 256 x 256 = 16.8 million (rounding up slightly). This is the total number of colors (16.8 million) any .JPG file can display. Ever. It's the limit of the file format. This number sounds impressive until you realize that most of our digital camera's are CAPABLE of 12 or 14 bit color (but *only* when shooting RAW). 12-Bit color renders 67 [I]million[/I] shades of color, or [I]four times[/I] as much as 8 bit color. I don't remember the numbers for 14-bit color and I don't want to do the math. Aaaaaaaanyway... Back to image size vs. file size. [B]Image[/b] size (aka "resolution") is dictated by the total number of pixels used to create the image. To calculate the megapixel size of an image you need to take the number of pixels wide and multiply it by the number of pixels tall. The resulting number, rounded to the nearest million, is the image's size in megapixels. That being said, I can record JPG's as small as 6MP on my D7100 (JPG Small = 2992 x 2000) or as large as 24MP (6000 x 4000). The D5200 can do the same thing, although the dimensions of the image are probably different. [B]File[/B] size (aka "how much space the file takes up on your hard drive") will be dependent on the number of MP's used to create the image but also on compression, if applied. RAW files are un-compressed, as are .TIFF files, which is why they are so much larger (in megabytes) as compared to .JPG files of the same mega-pixel size. This is because JPG is a compressed format that analyzes images in blocks of 8X8 pixels and selectively reduces the detail within each block to reduce file size. I hope that helps to clarify things a little. [COLOR="#FFFFFF"].....[/COLOR] [/QUOTE]
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Normal vs. Fine quality
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