TAILIEUCHUNG - CorelDRAW X5 The Official Guide part 83

CorelDRAW X5 The Official Guide part 83. Learn to create outstanding fine art and eye-catching commercial graphics with one powerful tool! CorelDRAW X5: The Official Guide is your comprehensive reference and workbook to get you started designing visually captivating CorelDRAW artwork. Learn, step by step, how to create the illustrations you've imagined, quickly assemble layouts for print and package designs, import and edit photos, master the art of typography and the science of color theory, make 3D scenes from 2D objects, and apply special effects to ordinary pictures. Packed with expert techniques and advice for creating professional-quality art, this. | 784 CorelDRAW X5 The Official Guide 5. Click the Object 1 thumbnail on the Objects list to select it you want to edit this not the Background object. 6. Choose Effects Sharpen High Pass. Wherever sharp transitions between pixel colors appear in the photo edge details are retained and strengthened. Wherever there is little color difference between neighboring pixels called low-frequency areas the visual information is filtered out leaving a neutral gray. The higher the Percentage you specify use 100 in this example the less original color is retained. The greater the Radius use about 12 in this example the greater the distance this filter examines from neighboring pixels to filter out areas of little detail difference. Click OK to apply these settings. CHAPTER 25 An Introduction to PHOTO-PAINT 785 7. Beyond the strong edges in Object 1 this object doesn t look as though it will contribute a lot to enhancing this enlarged image but the correct answer is Yes it will Merge modes are covered in the transparency section of Chapter 22 but for now here s a simple explanation of why Overlay mode will turn this largely gray object into a perfect lens to sharpen the underlying Background photo. The brightness values in a photo the tones not the colors are usually calculated on a scale from 0 to 255 255 representing the brightest area pure white has a brightness of 255 . Overlay merge mode can be thought of as a filter Overlay mode objects that have a brightness over 128 lighten bleach screen objects under them while brightness pixel values under 128 darken multiply the underlying pixels. The High 25 Pass filter made most of the pixels in this object neutral gray which has no effect in Overlay mode on the underlying pixels. However the edge details in Object 1 are darker and lighter than the underlying corresponding Background areas. Choose Overlay from the Merge Mode drop-down list. 8. Objects do not have to be 100 opaque. This Overlay mode object contributes a little too .

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