does chromatic fringing reduction/correction affect image quality negatively...? i know if improves CA obviously, curious to know if there is any side effects?
thanks
Full Version: does CA reduction affect IQ?
Chromatic is perhaps the most noticeable optical aberration in digital camera systems. On those occasions when I forget to remove it in ACR, I almost immediately notice it PS. If its removal introduces other aberrations, the effect does not grab my eye anything like the way chromatic does. Rainbows are hard to miss. Whatever the consequences of its removal, those would seem to pale by comparison.
Unscientifically, I have allowed myself to feel that swatting down chromatic also improves image sharpness by re-aligning edges.
And I have never kicked myself for removing chromatic, as I have sometimes done for over sharpening and such.
Unscientifically, I have allowed myself to feel that swatting down chromatic also improves image sharpness by re-aligning edges.
And I have never kicked myself for removing chromatic, as I have sometimes done for over sharpening and such.
QUOTE (bill t. @ Jul 6 2008, 07:00 PM)
Chromatic is perhaps the most noticeable optical aberration in digital camera systems. On those occasions when I forget to remove it in ACR, I almost immediately notice it PS. If its removal introduces other aberrations, the effect does not grab my eye anything like the way chromatic does. Rainbows are hard to miss. Whatever the consequences of its removal, those would seem to pale by comparison.
Unscientifically, I have allowed myself to feel that swatting down chromatic also improves image sharpness by re-aligning edges.
And I have never kicked myself for removing chromatic, as I have sometimes done for over sharpening and such.
Unscientifically, I have allowed myself to feel that swatting down chromatic also improves image sharpness by re-aligning edges.
And I have never kicked myself for removing chromatic, as I have sometimes done for over sharpening and such.
it certainly makes the images look digital.
QUOTE (michaelnotar @ Jul 7 2008, 12:32 AM)
does chromatic fringing reduction/correction affect image quality negatively...?
Transverse CA removal consists of solely realigning the 3 channels : it just can improve sharpness, if well made.
Fringing suppression by desaturation of high-contrast contour (eg with the "defringe" tool in LR) has much more side effect imho.
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