1 / 14

Advanced Image Effects: Blending, Mirroring, and Oil Painting Techniques in Digital Imaging

This lecture reviews advanced image effects, including blending, mirroring, and oil painting techniques. Learn how to load and display images, and create solid color pictures, including black and white and sepia tones. Discover the algorithms for blending two images, and how to achieve various effects by manipulating pixel values. Understand advanced blurring techniques and how to create oil painting effects by averaging pixel intensities. Perfect for those looking to deepen their understanding of digital image processing.

sevita
Télécharger la présentation

Advanced Image Effects: Blending, Mirroring, and Oil Painting Techniques in Digital Imaging

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ITEC 109 Lecture 24 Advanced Effects

  2. Review • Basic effects • Loading / Displaying • Solid color pictures • Black/White • Sepia

  3. Halloween • CS version of trick or treating

  4. Objectives • Learn about more complex effects • Blending • Green screening • Blurring • Oil Painting

  5. Blending • Combining pictures = +

  6. Algorithm • Load two pictures of the same size • Create new picture of same size • New picture’s pixels are 50% from first picture, 50% from the second

  7. Code def blend(one, two): f = one.get2DArray(); s = two.get2DArray(); last = new Picture(len(f),len(f[0])); result = last.get2DArray(); for i in range(0, len(f)): for j in range(0, len(f(i)): r1 = f[i][j].getRed(); g1 = f[i][j].getGreen(); b1 = f[i][j].getBlue(); r2 = s[i][j].getRed(); g2 = s[i][j].getGreen(); b2 = s[i][j].getBlue(); result[i][j].setRed( r1/2 + r2/2); result[i][j].setGreen( g1/2 + g2/2); result[i][j].setBlue( b1/2 + b2/2); return last;

  8. Mirroring • Make the bottom reflect the top

  9. Code def mirror(pic): val = pic.get2DArray(); width = val[0].length; for i in range (0, len(val)): for j in range(0, len(val(i))): val[i][width-j-1].setRed(val[i][j].getRed()); val[i][width-j-1].setGreen(val[i][j].getGreen()); val[i][width-j-1].setBlue(val[i][j].getBlue());

  10. Blurring • Smoothing type effect • Average r/g/b values around a pixel

  11. Code pixels = input.get2DArray(); output = Picture(pixels.length, pixels[0].length); values = output.get2DArray(); range=2; num=0; for i in range (0,len(pixels)): for j in range (0, len(pixels[i])): r = pixels[i][j].getRed(); g = pixels[i][j].getGreen(); b = pixels[i][j].getBlue(); num=1; for a in range(i-range, i+range) for c in range(j-range, j+range ): if (a > 0 and a < len(pixels) and c > 0 and c<len(pixels[a]) and & a !=i && c !=j) : r += pixels[a][c].getRed(); g += pixels[a][c].getGreen(); b += pixels[a][c].getBlue(); num++ r=r/num; g=g/num; b=b/num; values[i][j].setRed(r); values[i][j].setGreen(g); values[i][j].setBlue(b);

  12. Oil Painting • Blurring to the next level • Make pixels like the ones next to it

  13. Complicated • Range of pixels to look at (radius in a circle) • Calculate intensity of each pixel within range of source pixel • Create X bins for the entire spectrum (i.e. 255/X) • Determine number of pixels in each bin • Target picture’s pixel becomes the average r,g,b values of the pixels in the largest bin

  14. Review • More complicated photography effects • Blending • Oil painting • Much more out there

More Related