From 8362bf63dea22bbf6736609b0f49c152f975eb63 Mon Sep 17 00:00:00 2001 From: tpearson Date: Wed, 20 Jan 2010 01:29:50 +0000 Subject: Added old abandoned KDE3 version of koffice git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/koffice@1077364 283d02a7-25f6-0310-bc7c-ecb5cbfe19da --- doc/krita/using-filters.docbook | 923 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 923 insertions(+) create mode 100644 doc/krita/using-filters.docbook (limited to 'doc/krita/using-filters.docbook') diff --git a/doc/krita/using-filters.docbook b/doc/krita/using-filters.docbook new file mode 100644 index 000000000..3dd686c4c --- /dev/null +++ b/doc/krita/using-filters.docbook @@ -0,0 +1,923 @@ + +Filters + + +&krita; comes with a number of filters. These can be used to enhance or +otherwise modify the image, either in whole or in part. Some filters are +applied directly, others are customizable, meaning that you are presented with +a dialog in which you can tune the result to your liking before the filter is +applied. If a selection is active, a filter is applied on the selected part of +the image. If no selection is active, the entire image is modified. + +This chapter describes the available filters in detail. To make comparing the +filters easier, each filter has been applied to the same image and each description +contains a comparison image, showing the result of applying the filter described. +The original image (with thanks to the photographer, Christian Peper) is shown +below at half the original size. The sample images demonstrating the +results of applying the filters, with the original image at the left and the +modified image at the right, are shown at 25% of the original size. + +Some filters yield reasonable results for most images. For +other filters though, quite some tweaking needs to be done before the desired +outcome is achieved. If a filter does not do what you want, it might need +more or less customising. The examples in this chapter are exaggerated to +give a good impression of the filters. You will usually want to have more +gentle modifications. + +Tip: If you want to apply a filter to everything except a certain part of your +image (for example, you want to desaturate your image except for the centre), +select the part you do not want to apply the filter to, use the +SelectInvert +menu option, and then apply the filter. + + +See the Dialogs for working with +filters section for descriptions of the settings available for the +customizable filters. + + + +The original image + + + + + +The original image + +The original image + + + + +The Auto Contrast filter + +The Auto Contrast filter changes the contrast of your image to what should be +the best settings. Usually this works out fine, but in some cases (for example +photos taken under unusual lighting circumstances), the filter will not yield +satisfying results. + + +You can find the Auto Contrast filter in the Filter +Adjust menu. This filter is not customizable. + + +The image with the Auto Contrast filter applied to it + + + + + +The image with the Auto Contrast filter applied to it + +The image with the Auto Contrast filter applied to it + + + + + +The Blur filter + +You can use the Blur filter to blur your image (give it a fuzzy look). + + +You can find the filter in the Filter +Blur menu. +See the section on the +Blur dialog +for more information on its settings. + + +The image with the Blur filter applied to it + + + + + +The image with the Blur filter applied to it + +The image with the Blur filter applied to it + + + + + +The Brightness / Contrast filter + +With this filter, you can adjust the brightness and contrast of your image. + + +You can find the filter in the Filter +Adjust menu. +See the section on the +Brightness / Contrast dialog +for more information on its settings. + + +The image with the Brightness / Contrast filter applied to it + + + + + +The image with the Brightness / Contrast filter applied to it + +The image with the Brightness / Contrast filter applied to it + + + + + +The Bumpmap filter + +The Bumpmap filter takes two layers and uses one of these to convert the other +one so that it will give an illusion of depth. The object layer (the layer to be +transformed) is the actual layer that should receive the three-dimensional +looks. The bumpmap layer is a grayscale layer, which is read and used to +determine the height for each point of the object layer. Alternatively, the +same layer can be used as both object layer and bumpmap layer. + + +You can find the filter in the Filter +Map menu. +See the section on the +Bumpmap dialog for more information on its +settings. + + +The image with the Bumpmap filter applied to it + + + + + +The image with the Bumpmap filter applied to it + +The image with the Bumpmap filter applied to it + + + + + +The CImg Image Restoration filter + +With this filter, you can perform minor enhancements to your image, for +example removing small scratches or adding a slight blur. The difference +between our sample original image and the result of applying this filter with +standard settings is virtually none. + + +You can find the filter in the Filter +Enhance menu. +See the section on the +Image Restoration dialog +for more information on its settings. + + + + +The Color Adjustment filter + +This filter allows you to change the looks of your image by increasing or +decreasing the abundance of certain colors. + + +You can find the filter in the Filter +Adjust menu. +See the section on the +Color Adjustment dialog +for more information on its settings. + + +The image with the Color Adjustment filter applied to it + + + + + +The image with the Color Adjustment filter applied to it + +The image with the Color Adjustment filter applied to it + + + + + +The Color to Alpha filter + +This filter changes a color or color range in your image to become +transparent, effectively clearing regions with those colors. + + +You can find the filter in the Filter +Colors menu. +See the section on the +Color to Alpha dialog +for more information on its settings. + + +The image with the Color to Alpha filter applied to it + + + + + +The image with the Color to Alpha filter applied to it + +The image with the Color to Alpha filter applied to it + + + + + +The Color Transfer filter + +With this filter, you can re-color an image using the colors from another +image. Each color in your current image will be replaced by the most alike +color used in the other image. + + +You can find the filter in the Filter +Colors menu. +See the section on the +Color Transfer dialog +for more information on its settings. + + +The image with the Color Transfer filter applied to it + + + + + +The image with the Color Transfer filter applied to it + +The image with the Color Transfer filter applied to it + + + + + +The Custom Convolution filter + +This filter allows you to distort your image by setting a number of +parameters. + + +You can find the filter in the Filter +Enhance menu. +See the section on the +Custom Convolution dialog +for more information on its settings. + + +The image with the Custom Convolution filter applied to it + + + + + +The image with the Custom Convolution filter applied to it + +The image with the Custom Convolution filter applied to it + + + + + +The Desaturate filter + +This filter converts your image to grayscale by setting the saturation of each +pixel's color to zero. + + +You can find the filter in the Filter +Adjust menu. +This filter is not customizable. + + +The image with the Desaturate filter applied to it + + + + + +The image with the Desaturate filter applied to it + +The image with the Desaturate filter applied to it + + + + + +The Edge Detection filters + +These filters try to detect edges (boundaries) in the picture +and modify the image such that only these edges retain their respective colors, +while the rest of the image is turned gray. Through the use of lighting the +image will then get a three-dimensional look. + +There are four edge detection filters available. Each of these detects edges +from a different side (possibly considering other parts of the image as being +edges) and will therefore obtain a different resulting image. + + +You can find the filters in the Filter +Edge Detection menu. +These filters are not customizable. + + +The image with the Bottom Edge Detection filter applied to +it + + + + + +The image with the Bottom Edge Detection filter applied to it + +The image with the Bottom Edge Detection filter applied to +it + + + + + +The Emboss filters + +Emboss filters work somewhat like edge detection filters, with the difference +that embossed images are entirely gray. Areas in the picture are detected and +are given a certain height level, which is made visible by using +grayscale borders, making the image look like it is three-dimensional. + + +You can find the filters in the Filter +Emboss menu. +Except for the Emboss with Variable Depth filter, these filters are not +customizable. See the section on the +Emboss dialog +for more information on the settings of the Emboss with Variable Depth filter. + + +The image with the Emboss in All Directions filter applied to it + + + + + +The image with the Emboss in All Directions filter applied to it + +The image with the Emboss in All Directions filter applied to +it + + + +The image with the Emboss with Variable depth filter applied to +it + + + + + +The image with the Emboss with Variable depth filter applied to it + +The image with the Emboss with Variable depth filter applied to +it + + + + + +The Gaussian Blur filter + +This filter makes the image a little fuzzy by blurring it in a pseudo-random +way. A gaussian algorithm is used for finding the extent to which each part of +the image should be blurred. + + +You can find the filter in the Filter +Blur menu. +This filter is not customizable. + + +The image with the Gaussian Blur filter applied to it + + + + + +The image with the Gaussian Blur filter applied to it + +The image with the Gaussian Blur filter applied to +it + + + + + +The Gaussian Noise Reduction filter + +With this filter, you can remove noise from your image. + + +You can find the filter in the Filter +Enhance menu. +See the section on the +Gaussian Noise Reduction dialog +for more information on its settings. + + +The image with the Gaussian Noise Reduction filter applied to it + + + + + +The image with the Gaussian Noise Reduction filter applied to it + +The image with the Gaussian Noise Reduction filter applied to it + + + + + +The Invert filter + +This filter inverts all colors. The Red, Green and Blue component of each pixel +are taken and subtracted from 255. This means that red becomes cyan, green +becomes purple, and blue becomes yellow. The resulting values form the new +pixel color. + + +You can find the filter in the Filter +Adjust menu. +This filter is not customizable. + + +The image with the Invert filter applied to it + + + + + +The image with the Invert filter applied to it + +The image with the Invert filter applied to it + + + + + +The Lens Correction filter + +This filter can fix distortions in your image resulting from for example +pincushion lens effects, and modify some lighting. + + +You can find the filter in the Filter +Other menu. +See the section on the +Lens Correction dialog +for more information on its settings. + + +The image with the Lens Correction filter applied to it + + + + + +The image with the Lens Correction filter applied to it + +The image with the Lens Correction filter applied to it + + + + + +The Maximize Channel filter + +This filter gives each pixel in your image a new color: only the color channel +that contributes the most to the color of a pixel is retained (except for +gray pixels, which are kept gray). + + +You can find the filter in the Filter +Colors menu. +This filter is not customizable. + + +The image with the Maximize Channel filter applied to it + + + + + +The image with the Maximize Channel filter applied to it + +The image with the Maximize Channel filter applied to it + + + + + +The Mean Removal filter + +This filter sharpens the image by changing the colors of neighboring pixels +with approximately the same color, so that small differences are evened out. + + +You can find the filter in the Filter +Enhance menu. +This filter is not customizable. + + +The image with the Mean Removal filter applied to it + + + + + +The image with the Mean Removal filter applied to it + +The image with the Mean Removal filter applied to +it + + + + + +The Minimize Channel filter + +This filter gives each pixel in your image a new color: the color channel +that contributes the most to the color of a pixel is removed (except for +gray pixels, which are kept gray). + + +You can find the filter in the Filter +Colors menu. +This filter is not customizable. + + +The image with the Minimize Channel filter applied to it + + + + + +The image with the Minimize Channel filter applied to it + +The image with the Minimize Channel filter applied to it + + + + + +The Oilpaint filter + +An oilpaint effect is given to the image by creating patch-shaped areas in which +the most important color is applied to the entire area. + + +You can find the filter in the Filter +Artistic menu. +See the section on the +Oilpaint dialog +for more information on its settings. + + +The image with the Oilpaint filter applied to it + + + + + +The image with the Oilpaint filter applied to it + +The image with the Oilpaint filter applied to +it + + + + + +The Pixelize filter + +The image is pixelated by taking a square area and giving it the mean color +value of the pixels it contains. + + +You can find the filter in the Filter +Artistic menu. +See the section on the +Pixelize dialog +for more information on its settings. + + +The image with the Pixelize filter applied to it + + + + + +The image with the Pixelize filter applied to it + +The image with the Pixelize filter applied to +it + + + + + +The Raindrops filter + +This filter makes it look like raindrops have fallen on the image by distorting +drop-shaped areas with a lens-like effect as one would see when looking +at the image through a real raindrop. Some raindrops will have a fish-eye lens +effect. + + +You can find the filter in the Filter +Artistic menu. +See the section on the +Raindrops dialog +for more information on its settings. + + +The image with the Raindrops filter applied to it + + + + + +The image with the Raindrops filter applied to it + +The image with the Raindrops filter applied to +it + + + + + +The Random Noise filter + +With this filter, random noise can be added to your image. + + +You can find the filter in the Filter +Other menu. +See the section on the +Random Noise dialog +for more information on its settings. + + +The image with the Random Noise filter applied to it + + + + + +The image with the Random Noise filter applied to it + +The image with the Random Noise filter applied to it + + + + + +The Random Pick filter + +This filter distorts the image by interchanging pixels. + + +You can find the filter in the Filter +Other menu. +See the section on the +Random Pick dialog +for more information on its settings. + + +The image with the Random Pick filter applied to it + + + + + +The image with the Random Pick filter applied to it + +The image with the Random Pick filter applied to it + + + + + +The Round Corners filter + +This filter just rounds off the corners of the image. This is done by making +the outside of the rounded corner transparent. + + +You can find the filter in the Filter +Map menu. +See the section on the +Round Corners dialog +for more information on its settings. + + +The image with the Round Corners filter applied to it + + + + + +The image with the Round Corners filter applied to it + +The image with the Round Corners filter applied to +it + + + + + +The Sharpen filter + +This filter sharpens the image. + + +You can find the filter in the Filter +Enhance menu. +This filter is not customizable. + + +The image with the Sharpen filter applied to it + + + + + +The image with the Sharpen filter applied to it + +The image with the Sharpen filter applied to it + + + + + +The Small Tiles filter + +The picture is reduced in size and repeated multiple times. + + +You can find the filter in the Filter +Map menu. +See the section on the +Small Tiles dialog +for more information on its settings. + + +The image with the Small Tiles filter applied to it + + + + + +The image with the Small Tiles filter applied to it + +The image with the Small Tiles filter applied to +it + + + + + +The Sobel filter + +This is a more enhanced edge detection filter. + + +You can find the filter in the Filter +Edge Detection menu. +See the section on the +Sobel dialog +for more information on its settings. + + +The image with the Sobel filter applied to it + + + + + +The image with the Sobel filter applied to it + +The image with the Sobel filter applied to it + + + + + +The Unsharp Mask filter + +This filter sharpens part of your image. (The name unsharp is +historical: parts would be masked off while the rest would be made less sharp.) + + +You can find the filter in the Filter +Enhance menu. +See the section on the +Unsharp Mask dialog +for more information on its settings. + + +The image with the Unsharp Mask filter applied to it + + + + + +The image with the Unsharp Mask filter applied to it + +The image with the Unsharp Mask filter applied to it + + + + + +The Wave filter + +This filter transforms your image into a wave shape. + + +You can find the filter in the Filter +Other menu. +See the section on the +Wave dialog +for more information on its settings. + + +The image with the Wave filter applied to it + + + + + +The image with the Wave filter applied to it + +The image with the Wave filter applied to it + + + + + +The Wavelet Noise Reduction filter + +This filter reduces noise in the image by giving loose pixels a color close to +the surrounding area. This causes small details to be lost, but can enhance the +general view of the image when this is hampered by too many unnecessary details. + + +You can find the filter in the Filter +Enhance menu. +See the section on the +Wavelet Noise Reduction dialog +for more information on its settings. + + +The image with the Wavelet Noise Reduction filter applied to +it + + + + + +The image with the Wavelet Noise Reduction filter applied to it + +The image with the Wavelet Noise Reduction filter applied to +it + + + + + + -- cgit v1.2.3