### 8.19. Stretch Contrast HSV

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.

#### 8.19.1. Activating the Command

You can access this command from the main menu through Colors → Auto → Stretch Contrast HSV.

#### 8.19.2. 「Stretch Contrast HSV」 example

図16.158 元画像

The active layer and its Red, Green and Blue histograms before 「Stretch Contrast HSV」.

図16.159 コマンド適用後の画像

The active layer and its Red, Green and Blue histograms after 「Stretch Contrast HSV」. Contrast, luminosity and hues are enhanced.

8.18. コントラスト伸長 |  | 8.20. 色強調

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