Manga Colorization
Upcoming SlideShare
Loading in...5
×
 

Manga Colorization

on

  • 659 views

Presentation of Manga Colorization by Yingge Qu at The Chinese University of Hong Kong for my CSci 8980 Computer Science Design class taught by Gary Meyer at the University of Minnesota in Fall 2009.

Presentation of Manga Colorization by Yingge Qu at The Chinese University of Hong Kong for my CSci 8980 Computer Science Design class taught by Gary Meyer at the University of Minnesota in Fall 2009.

Statistics

Views

Total Views
659
Views on SlideShare
659
Embed Views
0

Actions

Likes
0
Downloads
3
Comments
0

0 Embeds 0

No embeds

Accessibility

Categories

Upload Details

Uploaded via as Adobe PDF

Usage Rights

CC Attribution-ShareAlike LicenseCC Attribution-ShareAlike License

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

    Manga Colorization Manga Colorization Presentation Transcript

    • M a n g a C o lo r iza t io n Y in g g e Q u T ie n -Ts in W o n g Ph e n g - A n n H e n g The Chinese University of Hong Kong MXMLLN Montgomery
    • Introduction Contributions Results Critique O u t lin e Paper •Introduction – Motivation – Previous Work •Contributions – Pattern Segmentation – Colorization ● Results Critique •Motivation •Technique Generalization MXMLLN Montgomery
    • Introduction Contributions Results Critique M o t iv a t io nProblemI. Manga are seldom colored due to the time and labor involved.II. The fine artistic details used to create the visual content andatmosphere are ill-suited for digital colorization techniques, i.e., b I.Half-toning II.Screening III.Hatching MXMLLN Montgomery
    • Introduction Contributions Results Critique Pr e v io u s W o r k User-Directed Colorization● User scribbles color in desired regions● Using constraint quadratic optimization problem, colorization isachieved under the assumption that adjacent pixels with similarintensities should be similarly colored MXMLLN Montgomery
    • Introduction Contributions Results Critique Pr e v io u s W o r k Semi-Automated Colorization● Colorization by matching swatches of greyscale image toreference color image● Auto regression filtering from the relationship between A and A,applied to input image B to create B● Colorization by transferring color from an example segmentedimage using high-level pixel context MXMLLN Montgomery
    • Introduction Contributions Results Critique Pr e v io u s W o r k Limitations● Works for intensity continuity, like photographs and videos● Is unable to handle pattern continuity, like illustrations MXMLLN Montgomery
    • Introduction Contributions Results Critique Pr e v io u s W o r k Texture-Based Segmentation● Texture is classified, segmented, and synthesized based ontexture properties of repeated elements: ● Size ● Aspect ratio ● Orientation ● Brightness ● Density MXMLLN Montgomery
    • Introduction Contributions Results Critique Im p le m e n t a t io n Color propagation employs a zero surface, geometric, level set method For more details, please refer to the text MXMLLN Montgomery
    • Introduction Contributions Results Critique C o n t r ib u t io n sPattern-continuous regions● Uniformly sample along userscribble to compute patternfeatures: ● Cluster feature patterns ● Identify major cluster ● Find average of major cluster● Allows some error in scribblingover unintended areas MXMLLN Montgomery
    • Introduction Contributions Results Critique C o n t r ib u t io n sPattern-continuous regions● Propagate color until patternreaches abrupt change● This step allows both splittingand merging between boundaries ● Disjoint regions can be colored with single scribble MXMLLN Montgomery
    • Introduction Contributions Results Critique C o n t r ib u t io n sIntensity-continuous regions● Leak proofing preventspropagation from leakingthrough gaps MXMLLN Montgomery
    • Introduction Contributions Results Critique C o n t r ib u t io n sColorization● Stroke-preservingcolorization ● Colorization is achieved by bleeding out from strokes and patterns MXMLLN Montgomery
    • Introduction Contributions Results Critique C o n t r ib u t io n sColorization● Pattern-to-shading ● Hatching and screening shading effects can be portrayed smoothly by color shading MXMLLN Montgomery
    • Introduction Contributions Results Critique C o n t r ib u t io n sColorization● Multi-color transition ● Colors are blended together based on their distance from the user scribble MXMLLN Montgomery
    • Introduction Contributions Results Critique Re s u lt sLimitations● System regards overlappedpatterns as distinct MXMLLN Montgomery
    • Introduction Contributions Results Critique C r it iq u eMotivation● Mangas are notcolored because ofthe extensiveprinting cost● Many techniques,such as hatching andscreening shading,may actually be lesslabor intensive incolor MXMLLN Montgomery
    • Introduction Contributions Results Critique C r it iq u e Technique generalization ● The authors never identify other applications of their technique ● More broadly than manga, their work is suitable for any intensity-homogenous images and videos. ● Including additional applications broadens the scope and reader base of a publication MXMLLN Montgomery