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Light field rendering (LFR) is an image-based method for generating novel views from a set of camera images. When sample of camera array is sparse, conventional light field rendering would cause aliasing artifacts. We present a straightforward layer-based method that significantly removes the aliasing artifacts with no prior knowledge of the scene geometry. First, a sparse disparity map is generated to detect the depth layers of the scene. Then, for synthesized each pixel, using the color consistency constraint to detect the optimum focal plane from the layer depths, and rendering such pixel with selected focal plane by LFR method. Finally, a trick method is used to reduce flickering artifacts caused by the color consistency constraint. Experimental results show the effectiveness of our approach.