Title :
On the effects of pre- and post-processing in video cartoonization with bilateral filters
Author :
Shahcheraghi, Zoya ; See, John
Author_Institution :
Fac. of Comput. & Inf., Multimedia Univ., Cyberjaya, Malaysia
Abstract :
In recent years, advances in image-based artistic rendering have grown steadily with the additional leverage of image and video processing techniques. Video cartoonization or stylization is the process of artificially incorporating cartoon-like effects to photorealistic input videos. This paper investigates the effects of integrating relevant pre- and post-processing tasks to significantly improve the quality of cartoonized videos processed with bilateral filters (BF). Our video cartoonization framework work extends the original Winnemöller´s real-time video abstraction framework, which applies the edge-preserving BF with additional use of edge maps, luminance quantization and frame temporal coherency. In our work, we propose a contrast enhancement option by intensity stretching and Laplacian filtering to finetune the contrast levels of the pre-BF frames. For the post-BF recombined frames, an unsharp masking procedure is proposed to accentuate feature details in the final output video. Results from extensive experiments conducted by qualitative user evaluation underline the essentiality of pre- and post-processing tasks for improved video cartoonization.
Keywords :
Laplace transforms; edge detection; feature extraction; high-pass filters; rendering (computer graphics); video signal processing; Laplacian filtering; Winnemoller real-time video abstraction framework; cartoon-like effects; contrast enhancement; contrast level finetuning; edge maps; edge-preserving bilateral filters; feature detail accentuation; frame temporal coherency; image processing; image-based artistic rendering; intensity stretching; luminance quantization; photorealistic input video; unsharp masking procedure; video cartoonization framework; video processing; video stylization; Image edge detection; Laplace equations;
Conference_Titel :
Signal and Image Processing Applications (ICSIPA), 2013 IEEE International Conference on
Conference_Location :
Melaka
Print_ISBN :
978-1-4799-0267-5
DOI :
10.1109/ICSIPA.2013.6707974