photo sharing and upload picture albums photo forums search pictures popular photos photography help login
Marko Björkroth | profile | all galleries >> Experiments with Dimage 7(i) >> Colorspace conversion (Dimage 7) tree view | thumbnails | slideshow

Colorspace conversion (Dimage 7)

Dimage 7's pictures require some post-processing, because the camera uses it's own, proprietary color space. It's color gamut, the "color palette", is much larger than the sRGB color space used by almost every other consumer-class camera. Pictures will look dull, the colors will be poor, when images are viewed on a typical PC monitor, because most programs are designed to deal with sRGB color space only. Therefore, it's necessary to convert the pictures to sRGB color space for on-screen viewing. However, printing is totally a different story. Depending on the printer, some other color space, such as AdobeRGB, might give better results.

Unfortunately, this exceptional color space has not been properly documented by Minolta. As a result, Dimage 7 has often been claimed to produce very poor colors. This is not true, the colors are rich and accurate after the MinoltaRGB -> sRGB conversion. The camera also provides unparalleled control over color saturation (7 levels!) and contrast.

Sample pictures have been optimized for a screen gamma of 2.2 and color temperature of ~6500 K (daylight). On an uncalibrated PC monitor they will appear too dark and blueish.

Downloadable profiles are available from Minolta's official web site (Minolta's profile) and from Thordur Arnason's web page
http://www.arnason.no/modules.php?name=NSN_Downloads

Original picture, resized to 640×480
Original picture, resized to 640×480
DIVU2: sRGB
DIVU2: sRGB
DIVU2: AppleRGB, gammacorrected
DIVU2: AppleRGB, gammacorrected
DIVU2: CIE RGB
DIVU2: CIE RGB
DIVU's color profile (MLTDim7) assigned
DIVU's color profile (MLTDim7) assigned
MLTDim7 profile assigned + curve adjustments
MLTDim7 profile assigned + curve adjustments
Minolta's new profile MLTDiM7.icc assigned
Minolta's new profile MLTDiM7.icc assigned
Converted to sRGB color space by using Colorfix program
Converted to sRGB color space by using Colorfix program
ANTDim7j experimental profile (© Anthony L. Davis) assigned
ANTDim7j experimental profile (© Anthony L. Davis) assigned
D7_Exp2_j  experimental profile (© Bill Cook) assigned
D7_Exp2_j experimental profile (© Bill Cook) assigned
D7-r22g21b215 D7 unbalanced profile (© Jeff Yigdall)
D7-r22g21b215 D7 unbalanced profile (© Jeff Yigdall)
DiMage7-sRGBmod profile (©Jeff Yigdall) assigned
DiMage7-sRGBmod profile (©Jeff Yigdall) assigned
Original, full size (2560×1920) picture, 2064 KB
Original, full size (2560×1920) picture, 2064 KB
Final version, 919 KB
Final version, 919 KB