Orientation adaptive subband coding of images
نویسندگان
چکیده
منابع مشابه
Orientation adaptive subband coding of images
In the subband coding of images, directionality of image features has thus far been exploited very little. The proposed subband coding scheme utilizes orientation of local image features to avoid the highly objectionable Gibbs-like phenomena observed at reconstructed image edges with conventional subband schemes at low bit rates, At comparable bit rates, the subjective image quality obtained by...
متن کاملEdge sensitive subband coding of images
In this paper, we introduce a family of novel edge preserving image coding techniques based on the discrete wavelet transform (DWT). These techniques utilize the edge map (which not necessarily contains closed curves) of the processed image or its subbands in the way that no ltering over edges is performed. This results in a reduction of power in the higher frequency bands. The achievable savin...
متن کاملSubband coding of images using vector quantization
Subband coding has proven to be a powerful technique for medium bandwidth source encoding of speech. Recently, some promising results have been reported on the extension of this concept to the source coding of images. In this paper, a new two-dimensional subband coding technique is presented which is also applied to images. A frequency band decomposition of the image is carried out by means of ...
متن کاملJoint source-channel subband coding of images
This paper proposes a new adaptive source-channel coding scheme in the context of subband coding. We rst express the total mean-squared distortion su ered by the source in terms of source and channel distortions of the subbands. We then minimize this total distortion by an appropriate choice of source and channel coding rates for the subbands. This corresponds to casting the conventional bit al...
متن کاملSubband Coding of Color Images with Dynamic Arithmetic Coder Allocation
This paper presents a subband coder for compression of color still images. The red, green, and blue (RGB) color components are rst transformed to a luminance-chrominance representation , and then each of the three image components are decomposed by an FIR analysis lter bank. The two chrominance components are decimated by a factor of 10:1 or 20:1, depending on the bit rate. The coder is based o...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Image Processing
سال: 1994
ISSN: 1057-7149
DOI: 10.1109/83.298396