CSJ2K.j2k.codestream.reader.BitstreamReaderAgent.getCompImgWidth C# (CSharp) Метод

Документация по классу BitstreamReaderAgent Показать файл Открыть проект

getCompImgWidth() публичный Метод

Returns the width in pixels of the specified component in the overall image, for the given (component) resolution level.

Note: Component resolution level indexes may differ from tile-component resolution index. They are indeed indexed starting from the lowest number of decomposition levels of same component of each tile.

Example: For an image (2 tiles) with 1 component (tile 0 having 2 decomposition levels and tile 1 having 3 decomposition levels), the first tile(-component) has 3 resolution levels and the second one has 4 resolution levels, whereas the component has only 3 resolution levels available.

public getCompImgWidth ( int c, int rl ) : int
c	int	The index of the component, from 0 to N-1. /// ///
rl	int	The resolution level, from 0 to L. /// ///
Результат	int

        public int getCompImgWidth(int c, int rl)
        {
            int sx, ex;
            int dl = decSpec.dls.getMinInComp(c) - rl;
            // indexation (0 is hi-res)
            // Calculate image starting x at component hi-res grid
            sx = (ax + hd.getCompSubsX(c) - 1) / hd.getCompSubsX(c);
            // Calculate image ending (excluding) x at component hi-res grid
            ex = (ax + imgW + hd.getCompSubsX(c) - 1) / hd.getCompSubsX(c);
            // The difference at the rl level is the width
            return (ex + (1 << dl) - 1) / (1 << dl) - (sx + (1 << dl) - 1) / (1 << dl);
        }

BitstreamReaderAgent

createInstance

getCodeBlock

getCompImgHeight

getCompImgWidth

getCompSubsX

getCompSubsY

getImgHeight

getImgULX

getImgULY

getImgWidth

getNumTiles