Sony Cyber-shot DSC-R1 Review
Output image file quality / JPEG artifacts
Standard Test Scene
Below you will find 200% magnified crops of the same 240 x 100 portion of the center of a sequence of images taken at full size but different output settings. The RAW file was converted to a TIFF using Sony Image Data Converter SR 1.0.
|3888 x 2592 RAW (Uncompressed) - 20,534 KB .SRF (not for download) (VGA TIFF crop)|
|3888 x 2592 JPEG Fine - 4,142 KB .JPG|
|3888 x 2592 JPEG Standard - 2,295 KB .JPG|
As we've seen on previous Olympus cameras the SHQ JPEG is as good as lossless and makes the TIFF option pretty redundant (you'll be hard pushed to see a difference). The optimum mode is probably HQ at the 1/4 setting which delivers files of around 4 MB with virtually not artifacts at all. Higher compression than this (1/8 or 1/12 settings) do lead to some JPEG artifacts, especially around detail edges.
Color mode / color space
The DSC-R1 has one menu option labelled 'Color', this allows you to select between Standard (which is in sRGB), Vivid (also sRGB) and Adobe RGB color output modes. As you can see from the samples below the 'Standard' mode is already pretty vivid, saturated enough for my tastes, selecting the Vivid option turns color saturation up even higher and also increases image contrast. In Adobe RGB mode color saturation is slightly higher, contrast slightly lower.
Images taken in the Adobe RGB color space have their filename prefixed with an underscore (_) this complies with DCF 2.0 (Exif 2.21)*. Place your mouse over the label to see a ColorChecker chart shot in the respective mode.
|Standard (sRGB)||Vivid (sRGB)||Adobe RGB|
* This has nothing in particular to do with Sony but this renaming system makes it difficult to keep your images in the correct order if you don't routinely rename them by date/time.
Color space: CIE u'v' Color Distribution chart
Note that in these samples the Adobe RGB image has not been converted to sRGB and so to view it correctly you will have to load it into a color space aware photo application and assign the Adobe RGB color space. Below each sample is the CIE u'v' Color Distribution chart; larger gray triangle approximately represents the range of color which the human eye can resolve, the inner triangle the available gamut in each color space (sRGB or Adobe RGB).
|Standard (sRGB)||Vivid (sRGB)||Adobe RGB|
Dec 6, 2005
Sep 8, 2005
Dec 2, 2008
Dec 2, 2008
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