QccIMGImageInverseScalarQuantize.3

NAME

QccIMGImageComponentScalarQuantize, QccIMGImageComponentInverseScalarQuantize, QccIMGImageScalarQuantize, QccIMGImageInverseScalarQuantize, - scalar quantization of images and image components

int QccIMGImageComponentScalarQuantize(const QccIMGImageComponent *image_component, const QccSQScalarQuantizer *quantizer, QccVector distortion, QccChannel *channel);
int QccIMGImageComponentInverseScalarQuantize(const QccChannel *channel, const QccSQScalarQuantizer *quantizer, QccIMGImageComponent *image_component);

int QccIMGImageScalarQuantize(const QccIMGImage *image, const QccSQScalarQuantizer *quantizers, QccChannel *channels);
int QccIMGImageInverseScalarQuantize(const QccChannel *channels, const QccSQScalarQuantizer *quantizers, QccIMGImage *image);

DESCRIPTION

QccIMGImageComponentScalarQuantize() calls QccSQScalarQuantization(3) for each pixel in image_component, effectively scalar quantizing the pixel with quantizer. The resulting quantization indices are returned in channel which must be allocated prior to calling QccIMGImageComponentScalarQuantize(). If distortion is not NULL, the squared-error distortion between each pixel and its quantized reconstruction is returned in distortion.

QccIMGImageComponentInverseScalarQuantize() inverse quantizes the quantization indices in channel, reconstructing the pixels which are returned in image_component.

QccIMGImageScalarQuantize() and QccIMGImageInverseScalarQuantize() call QccIMGImageComponentScalarQuantize() and QccIMGImageComponentInverseScalarQuantize(), respectively, for each of the Y, U, and V components of image. quantizers and channels are arrays of quantizers and channels, one for each image component.

RETURN VALUE

These routines return 0 on success, 1 on failure.

AUTHOR

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