{"id":1181,"date":"2009-04-08T22:06:12","date_gmt":"2009-04-08T13:06:12","guid":{"rendered":"https:\/\/regex.info\/blog\/2009-04-08\/1181"},"modified":"2009-04-08T22:06:12","modified_gmt":"2009-04-08T13:06:12","slug":"strange-image-effect-that-i-dont-understand-any-ideas","status":"publish","type":"post","link":"https:\/\/regex.info\/blog\/2009-04-08\/1181","title":{"rendered":"Strange Image Effect that I Don’t Understand… Any Ideas?"},"content":{"rendered":"\n\n\n
\nNOTE<\/b>: Images with an icon next to them have been artificially shrunk to better fit your screen; click the icon to restore them, in place, to their regular size.\n<\/div>\n\n\n
<\/a>\nNikon D700 + Nikkor 70-200mm f\/2.8 @ 200 mm — 1<\/sup>\/<\/big>400 sec, f<\/span>\/6.3, ISO 900 —\nmap & image data<\/a> — nearby photos<\/a><\/span>\nsorta' pretty, but\nSomething Strange<\/span>\n<\/div>\n\n

The photo above is a repeat of the first photo in yesterday's post<\/a>. They're\nsome cherry blossoms that were overhanging our car in the parking lot of a\nrestaurant<\/span> on Awaji Island. The image<\/span> has some strange artifacts that I'm\nat a loss<\/span> to explain, so thought I'd ask whether anyone understands their\nsource.<\/p>\n\n

Here are two full-resolution crops – one from near the center, and\nanother from left of center – that show some odd haloes around some\nitems, but not around others...<\/p>\n\n

<\/a>\n<\/div>\n\n
<\/a>\n<\/div>\n\n

Clicking on any of these images brings up the full-resoltion 4,256 × 2,832 pixel image<\/a>.<\/p>\n\n

These kind of effects are often the result of heavy-handed post\nprocessing.... adding too much fill light, or tweaking the luminosity or\nsaturation of the background, for example, but none of that went on here. The image<\/span> and crops here are just as loaded in Lightroom without any\npost-processing whatsoever.<\/p>\n\n

(Actually, while wondering whether the effects were influenced by the\ncamera-calibration setting, I tried<\/span> several. None seemed to have any impact\nthe strange effect, but I preferred<\/span> the “Camera Vivid” calibration for this\none, so did leave it at that setting for these examples.)<\/p>\n\n

I also checked the full-resolution jpeg embedded within\nthe raw file<\/a>, as well as a simple<\/span> conversion of the raw data with dcraw<\/a>, and\nfound no differences, so it's certain that the effects were created in\ncamera.<\/p>\n\n

Camera shake could cause artifacts like this, but in that case I would<\/span>\nexpect the odd effect to be uniform across the image. Subject shake could\naccount for localized effects, but in the branch crop, for example, it's\nmuch more pronounced on one side of the branch than the other, which rules\nout that the branch was shaking really really fast (the shutter speed is\n1\/400th of a second<\/span>).<\/p>\n\n

I also wondered for a bit whether it might be some kind of hiccup with\nthe lens' VR mechanism, but like camera shake, I'd think<\/span> that would affect\nall areas of the frame equally.<\/p>\n\n

I'm at a total loss to explain this, and find myself at the point of\nwondering whether there's such a thing<\/span> as translucent bark. Any ideas?<\/p>\n\n\n","protected":false},"excerpt":{"rendered":"

The photo above is a repeat of the first photo in yesterday's post. They're some cherry blossoms that were overhanging our car in the parking lot of a restaurant on Awaji Island. The image has some strange artifacts that I'm at a loss to explain, so thought I'd ask whether anyone understands their source.<\/p>

Here are two full-resolution crops – one from near the center, and another from left of center – that show some odd haloes around some items, but not around others...<\/p>

Clicking on any of these images brings up the full-resoltion 4,256 × 2,832 pixel image.<\/p>

These [...]","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,4],"tags":[],"_links":{"self":[{"href":"https:\/\/regex.info\/blog\/wp-json\/wp\/v2\/posts\/1181"}],"collection":[{"href":"https:\/\/regex.info\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/regex.info\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/regex.info\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/regex.info\/blog\/wp-json\/wp\/v2\/comments?post=1181"}],"version-history":[{"count":0,"href":"https:\/\/regex.info\/blog\/wp-json\/wp\/v2\/posts\/1181\/revisions"}],"wp:attachment":[{"href":"https:\/\/regex.info\/blog\/wp-json\/wp\/v2\/media?parent=1181"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/regex.info\/blog\/wp-json\/wp\/v2\/categories?post=1181"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/regex.info\/blog\/wp-json\/wp\/v2\/tags?post=1181"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}