CSE237A: Final Project Mid-Report Image Enhancement for portable platforms
نویسنده
چکیده
The contrast enhancement technique used manipulates the DCT coefficients of a JPEG image to improve its quality. It is carried out in the decompression stage so that the compressibility of the image is not affected. Since DCT and its inverse transform IDCT are performed on 8 x 8 blocks of pixels, any image processing algorithm implemented in the transform domain produces flaws known as blocking artifacts. These artifacts are a direct result of the independent processing of blocks which does not take into account the existing correlations among pixels in adjacent blocks. So the enhancement unit also tries to minimize these blocking artifacts introduced as a result of processing in the transform domain.
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