GIMP tools - BDA

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<strong>GIMP</strong> 178 filters that work in a slightly different manner but they all change the image by modifying its exterior view and adding additional elements to it. You can find the list of all available commands for the work with filters under the menu item Filters Filters are divided into groups; they are very well structured. For instance, the Distorts sub-menu is designed for image distorting; the Artistic sub-menu is used for imitating various artistic styles and the methods of creating a painting, etc. The selected filter is applied to a full image on the current layer. If we have just opened the image and applied a filter, the filter will affect the sole layer (Background). If the image is composed of several layers, the layer containing the element to which the filter is applied is first selected and then followed by the application of the filter. Certain filters do not change the image. The area of filter effect can be limited by selecting, i.e. first of all, the image area is selected and then followed by the application of the filter to the selected area. It should be noted that the dialog boxes for setting all filter parameters contain a preview window that enables a real-time preview of modifications in the image to be made by the filter after setting the parameters and before the application of the filter. The user should be aware that certain filters significantly overload computer memory, therefore, sometimes the preview option should be closed. The methodology of application is similar for all filters. Let's analyse several filters from each group. Blur filters It is a group of filters that blur the image, i.e. it becomes less clear. After selecting Filters Blur command a list of filters belonging to this group appears where each filter blurs an image in a different way. Blur In this group the Blur filter is the simplest filter that does not require any additional settings and makes the image more blurred. You can see a blue bar at the bottom of the main program window which shows the filter loading. The speed of filter application to the image depends on the size of the edited image and computer technical properties. The filter may be applied instantly or its loading may take several minutes. Once the filter is applied the image becomes slightly blurred.
179 It is applied to cover unwanted marginal speckles, tears or small defects caused by scanner glass dust while scanning. If required, the filter may be used repeatedly. If a stronger blur effect is needed, the GAUSSIAN BLUR filter is a better option. Note! Once the filter is applied, the image seems like captured by a moving camera. The filter calculates an average colour value for each pixel by means of the values of two adjacent pixels. Gaussian blur It is a more sophisticated filter as it provides more possibilities for adjusting the intensity of the blur effect. The filter is applied in the following way: 1. Open the image to which you want to apply the filter; 2. Choose FiltersBlurGaussian Blur command. It opens the Gaussian Blur dialog box. Note! 3. Set the following parameters: • Blur Radius – select the blur intensity of the image. Enter the radius value in the Horizontal and Vertical boxes. The key point of the Gaussian Blur method is that the colour of each pixel changes depending on the colour of the pixels surrounding it. The larger the area around the pixel, the more blurred the image gets. This parameter specifies the radius of the area of the surrounding pixels for formatting each of the following pixels. The values Horizontal and Vertical are interdependent; when one value is changed, the other changes as well. It is required to make the blur even. Once they are disconnected and different values are entered, the result is a movement effect, however, there is a separate filter to cover this function; • Select Blur Method: o IIR (Infinite Impulse Response) works best for real images, such as photographs, i.e. for images which are not computer-generated;
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STUDENT’S BOOK GIMP This work is
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3 Foreground & Background Colors __
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5 Copying and merging layers ______
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7 Round corners ___________________
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9 Introduction Gimp 1 is a graphics
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11 Environment This dialog lets you
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13 Theme This section lets the user
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15 If the Use “Dot for dot” by
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17 space. If you can choose between
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19 When you save a file in this for
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21 If you need to change a folder o
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23 There is no need to select more
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25 Image Window GIMP lets you work
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27 If the drop-down list does not i
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29 Pixel is a single point in the i
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31 RGB model Colours are represente
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33 3) from the keyboard using an ac
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35 1. Replace the current selection
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37 In the selection, corners the po
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39 Guides 18 - you can choose the t
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41 We already know the first three
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43 the mouse pointer inside the pat
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45 Select the adjacent white areas
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47 Foreground Select Tool lets you
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49 context menu and select Alpha to
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51 You have to clone some of the st
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53 a) Standard Toolbox b) Tools ico
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55 At first select one of the three
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57 Moving Brightness and Contract s
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59 Levels When working with a low d
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61 Curves This tool changes the col
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63 Reducing the value reduces the n
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65 Select the operation from the Op
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67 2. Access the command through Co
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69 The dialog box has two groups of
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71 a) Original image b) After the c
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73 When you open an image and use t
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75 14. Now try to blur the boundari
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77 Tool Name of the tool Shape of t
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79 Tool Name of the tool Shape of t
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81 The dialog box displays the foll
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83 Scale allows you precisely to mo
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85 not added together. Activate Inc
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87 o o BG color fill - the fill col
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89 Thresholds = 15 Thresholds = 35
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91 It should be mentioned that the
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93 The Clone method mixes strokes w
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95 The Perspective Clone Tool has t
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97 Healing Select the Healing Tool
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99 9. Name the image, indicate the
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101 The operations performed by thi
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103 Colour picking Pick a foregroun
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105 Type - to choose the effect of
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107 them, you see the overall image
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109 layer is highlighted by a darke
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111 The layer is selected and moved
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113 Copying and merging layers Sele
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115 Mode Description appearance. Th
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117 Name of the command Layer to Im
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119 Disable the Quick Mask mode. In
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121 9. The selected lilies are copi
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123 2. Reverse the layers. In the L
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125 colour (ffffff) The top part of
Page 127 and 128: 127 Font - you can select a font an
Page 129 and 130: 129 There is only the Background la
Page 131 and 132: 131 The text is hardly legible. Cha
Page 133 and 134: 133 Thus, it is not recommended to
Page 135 and 136: 135 Edit Mode allows you selecting
Page 137 and 138: 137 In this mode you can fully edit
Page 139 and 140: 139 Create a new name of the path i
Page 141 and 142: 141 Close Tab - you can close the a
Page 143 and 144: 143 Every point (pixel) is a combin
Page 145 and 146: 145 Repeat steps 1-4. 5. Set the sl
Page 147 and 148: 147 Open the list of special comman
Page 149 and 150: 149 In the middle of the dialog, yo
Page 151 and 152: 151 Press the left mouse button and
Page 153 and 154: 153 You have just performed four ac
Page 155 and 156: 155 Below you can find lists where
Page 157 and 158: 157 You can set a colour using slid
Page 159 and 160: 159 In the Change Foreground Color
Page 161 and 162: 161 Button Name Description o angle
Page 163 and 164: 163 5. Create a copy of the petal a
Page 165 and 166: 165 1. Open a website where you fou
Page 167 and 168: 167 Button Name Description New gra
Page 169 and 170: 169 Click on the colour and it is a
Page 171 and 172: 171 Buffers It is an exchange buffe
Page 173 and 174: 173 At the bottom of the tab dialog
Page 175 and 176: 175 Button Name Description Name -
Page 177: 177 Error console This dialog displ
Page 181 and 182: 181 a) original image b) image afte
Page 183 and 184: 183 2. Apply FiltersBlur Pixelize c
Page 185 and 186: 185 Motion blur The filter creates
Page 187 and 188: 187 B. 1. Select FileOpen command t
Page 189 and 190: 189 Enhance filters The filters of
Page 191 and 192: 191 The filter is designed to remov
Page 193 and 194: 193 Red eye removal This filter doe
Page 195 and 196: 195 Filter name Short description W
Page 197 and 198: 197 Filter name Short description C
Page 199 and 200: 199 A. c) Opacity - 100; Curl Locat
Page 201 and 202: 201 3. Set the following parameters
Page 203 and 204: 203 The colour of battens depends o
Page 205 and 206: 205 a) original image b) after the
Page 207 and 208: 207 How to use this filter? 1. Open
Page 209 and 210: 209 Curve bend The filter distorts
Page 213 and 214: 213 Apply Lens - create an effect o
Page 215 and 216: 215 o Center - set the coordinates
Page 217 and 218: 217 Center of Nova - choose the loc
Page 221 and 222: 221 To apply the filter to a word,
Page 223 and 224: 223 The slider of the Value scale i
Page 225 and 226: 225 If checked, the Independent RGB
Page 227 and 228: 227 1. Open an image; 2. Choose Fil
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229 Enter values to the matrix boxe
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231 1. Open image oil_1.jpg; 2. App
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233 TASK. Open image can_1.jpg and
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235 Cubism This filter modifies the
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237 c) 1. Open image kub_1.jpg; 2.
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239 a) original image b) image afte
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241 a) original image b) after the
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243 Check the Add drop-shadow check
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245 The filter adds a fuzzy, blurre
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247 Delta value on color - make the
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249 If checked, the Work on copy ch
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251 Font color - yellow (HTML notat
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253 Filter name Designation Render
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255 The Number of Titles group-box
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257 The Width parameter sets the wi
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259 The filter covers all layers or
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261 5. Apply FiltersRenderLava comm
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263 Circuit The filter create appli
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265 4. Select the Bucket Fill Tool
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267 24. Paint a mouth. To open a ne
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269 3. As a drop-down list of file
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271 RGB RGB is the default color mo
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273 By means of the color model sel
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275 If the working window (canvas)
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277 Apply ImageGuidesNew Guide (by
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279 ImageGuidesNew Guides from Sele
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281 one of the selected units becau
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283 2. Press Smurge Tool . Remove t
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285 3. To make it easier to retouch
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287 6. Now invert colors. Apply Col
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289 11. Now, we will retouch the ey
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291 a) objects selected in the mask
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293 6. Move the Background layer up
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295 a) before the filter is applied
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297 7.2. Apply Filters ArtisticWeav
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299 Before designing such a "busine
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301 6.2. Apply EditCopy command; 6.
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303 3. Go back to RGB color model.
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305 7. Press the Flip Tool. Select
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307 8. Draw the luminous windows fo
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309 15. We will now use the filter
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311 24.1. Drag the corners of the s
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313 12. Enter text TALLINN KOOLITUS
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315 2.1. Enter the banner text to t
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317 23. Choose Filters Light and Sh
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319 13. In the Paths dialog, click
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321 3. Make sure that the options d
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323 9. Change the layer properties
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325 5.3. Press OK; 6. In the Layers
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327 4. Select the Blend Tool and ad
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329 23. We may apply various filter
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