### 9.5. 明るさの最小値

#### 9.5.1. 概観

図17.194 明るさの最小値

元画像

Filter applied

明るさの最大値 フィルターは活性レイヤーもしくはその選択範囲の明るい部分を拡げ、 強調します。

For every image pixel, it brings the pixel Value (luminosity) into line with the upper value (the brightest) of the 8 neighboring pixels (3×3 matrix). So, a bright pixel is added around bright areas. An isolated pixel on a brighter background will be deleted. A larger bright area will dilate by one pixel in all directions.

On complex images, bright areas are widened and enhanced the same, and somewhat pixelated.

背景が単色ならこのフィルターはノイズを取り除きます。

図17.195 「Dilate」 example

#### 9.5.2. Activating the Filter

This filter is found in the main menu under Filters → Generic → Dilate.

#### 9.5.3. 使用例

図17.196 ネオン効果を明るさの最小値で拡張

9.4. Normal Map |  | 9.6. 明るさの最大値

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