### 6.7. Искрение

#### 6.7.1. Общая информация

Рисунок 17.130. Пример применения фильтра «Искрение»

Исходное изображение

Filter applied

This filter adds sparkles to your image. It uses the lightest points determined by the Luminosity threshold. It is difficult to predict the location of the sparkles. You can add white dots on your image where you want the sparkles to appear.

| Примечание
If the image is in indexed mode, this menu entry is disabled.

#### 6.7.2. Активация фильтра

Этот фильтр находится в меню Фильтры → Свет и тень → Искрение….

#### 6.7.3. Параметры

Рисунок 17.131. Параметры фильтра «Искрение»

Просмотр

  If checked, the settings are interactively updated in the preview area. Scroll bars allow you to move the image, but you can also drag the visible area with your pointing device.

Порог яркости

  The higher the threshold, the more areas will get sparkles.

Интенсивность вспышки

  This adjusts the strength of the flare.

Длина луча

  This determines the length of the rays. Reducing this value causes small spikes to decrease first.

Число лучей

  The number of starting points for spikes. This value is used for both the number of big spikes and small spikes. When this value is odd, small spikes are opposite the big ones. When it is even, big spikes are opposite another big spike.

Угол луча (-1: случайный)

  This sets the angle of the first big spike. If set to -1, the angle is chosen at random. If a spot has several pixels within the Luminosity threshold, each of them will generate a sparkle. If the angle is positive, they will all be superimposed. With -1, each sparkle will have a random rotation resulting in numerous thin spikes.

Плотность луча

  This option determines the number of sparkles on your image. It indicates the percentage of all possible sparkles that will be preserved.

Полупрозрачность

  When you increase transparency, sparkles become more transparent and the layer beneath becomes visible. If there is no other layer, sparkle saturation decreases.

Случайный тон

  This sets how much the hue of the sparkles should be changed randomly.

Случайная насыщенность

  This sets how much the saturation of the sparkles should be changed randomly.

Additional Options
  Сохранять яркость

    If set, the central pixels of the sparkle keep the luminosity of the brightest pixel. This reduces the brightness.

  Инверсия

    Instead of selecting the brightest pixels in the image, Sparkle will select the darkest ones, resulting in dark sparkles.

  Добавить рамку

    When enabled, instead of creating sparkles on the brightest pixels, this creates an image border made up of sparkles.

Color type
  Естественный свет, Цвет переднего плана, Цвет фона

    This selects the color used for the central pixels of the sparkles. This color will be added in Screen mode (Multiply if Inverse is checked). «Natural color» is the color of the pixel in the image.

6.6. Освещение |  | 6.8. Падающая тень

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