The Stretch Contrast HSV command does the same thing as the Stretch Contrast command, except that it works in HSV color space, rather than RGB color space, and it preserves the Hue. Thus, it independently stretches the ranges of the Hue, Saturation and Value components of the colors. Occasionally the results are good, often they are a bit odd. “Stretch Contrast HSV” operates on layers from RGB and Indexed images. If the image is Grayscale, the menu entry is disabled.

8.19.2. Ejemplo de “Estirar contraste HSV”

Figura 16.156. Imagen original

La capa activa y sus histogramas de color rojo, verde y azul, antes de “Estirar contraste HSV”.

Figura 16.157. La imagen después del comando

La capa activa y sus histogramas de color rojo, verde y azul, después de “Estirar contraste HSV”. Contraste, luminosidad y tonalidad estirados.