5.16. Sarmal ve Kıstırma

5.16.1. Genel Görünüm

Şekil 17.94. “Sarmal ve Kıstırma” süzgeci örneği

Özgün görüntü

“Sarmal ve Kıstırma” süzgeci uygulandı

“Whirl and Pinch” distorts your image in a concentric way.

“Whirl” (applying a non-zero Whirl angle) distorts the image much like the little whirlpool that appears when you empty your bath.

“Pinch”, with a nil rotation, can be compared to applying your image to a soft rubber surface and squeezing the edges or corners. If the Pinch amount slider is set to a negative value, it will look as if someone tried to push a round object up toward you from behind the rubber skin. If the Pinch amount is set to a positive value, it looks like someone is dragging or sucking on the surface from behind, and away from you.

	İpucu
	The “pinch” effect can sometimes be used to compensate for image distortion produced by telephoto or fish-eye lenses (“barrel distortion”).

Şekil 17.95. Örnekleme

Özgün

Sarmal

Kıstırma

5.16.2. Süzgeci Etkinleştirme

Bu süzgeç ana menüde Süzgeçler → Bozulma → Sarmal ve Kıstırma… altında bulunur.

5.16.3. Seçenekler

Şekil 17.96. “Sarmal ve Kıstırma” süzgeci seçenekleri

Önayarlar, “Girdi Türü”, Kırpma, Harmanlama Seçenekleri, Ön izleme, Süzgeci birleştir, Bölünmüş görünüm

	Not
	Bu seçenekler şurada açıklanmıştır: Kısım 2, “Ortak Özellikler”.

Sarmal

The clockwise or counter clockwise angle (-360 to +360). Controls how many degrees the affected part of the image is rotated.

Kıstırma

The pinch amount (-1 to +1) determines how strongly the affected part of the image is pinched.

Yarıçap

Whirlpool width (0.0-2.0). Determines how much of the image is affected by the distortion. If you set Radius to 2, the entire image will be affected. If you set Radius to 1, half the image will be affected. If Radius is set to 0, nothing will be affected (think of it as the radius in a circle with 0 in the center and 1 halfway out).