| 4.4. High Pass | ||
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4. Enhance Filters |  |
| 4.4. High Pass | ||
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4. Enhance Filters | |
In sound processing, a high-pass filter filters high frequencies above a threshold. In digital images, frequency refers to sudden changes in brightness or color in neighboring pixels. The High Pass filter filters high essential details, and larger scale gradients are removed. This result, combined with the original image and "Soft Light" or "Hard Light" merge mode, is used to sharpen images. It enhances fine details.
These options are common to GEGL-based filters. Please refer to Section 2, “Common Features”.
Increasing this Standard Deviation lowers the filter threshold and more image details are taken in account for treatment.
Increase/Decrease contrast of treated details.
The result of this filter can be larger than the original image. With the default Adjust option, the layer will be automatically resized as necessary when the filter is applied. With the Clip option the result will be clipped to the layer boundary.
