Revision 11899 trunk/libraries/libRaster/src/org/gvsig/raster/grid/filter/enhancement/ContrastByteFilter.java
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA. |
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*/ |
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package org.gvsig.raster.grid.filter.enhancement; |
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import org.gvsig.raster.buffer.RasterBuffer; |
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import org.gvsig.raster.dataset.IBuffer; |
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/** |
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* Filtro de contraste para tipo de datos byte. |
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* |
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*/ |
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public class ContrastByteFilter extends ContrastFilter {
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protected IBuffer rasterResult = null; |
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/** |
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* Constructor. Llama al constructor de la clase |
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super(); |
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} |
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int diferencia = 0; |
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/* |
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* (non-Javadoc) |
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* @see org.gvsig.raster.grid.filter.enhancement.ContrastFilter#pre() |
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exec = true; |
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this.raster = (RasterBuffer) params.get("raster");
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height = raster.getHeight(); |
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width = raster.getWidth();
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width = raster.getWidth();
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this.incrContraste = ((Integer) params.get("incrContraste")).intValue();
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rasterResult = RasterBuffer.getBuffer(IBuffer.TYPE_BYTE, raster.getWidth(), raster.getHeight(), raster.getBandCount(), true); |
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super.pre(); |
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} |
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* @return valor de la banda con el algoritmo aplicado |
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*/ |
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private int calcContrast(int px){
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if(incrContraste >= 0){
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if (px < 127){
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int diferencia; |
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int result = 0; |
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if (incrContraste >= 0) {
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if (px < 127) {
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diferencia = 127 - px; |
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result = px - (int)((diferencia * 5) * (incrContraste*0.1) / 25); |
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if(result < 0) result = 0; |
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result = px - (int) ((diferencia * 5) * (incrContraste * 0.1) / 25); |
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if (result < 0) |
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result = 0; |
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} |
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if (px > 127){
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if (px > 127) {
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diferencia = px - 127; |
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result = px + (int)((diferencia * 5) * (incrContraste * 0.1) / 25); |
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if(result > 255) result = 255; |
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result = px + (int) ((diferencia * 5) * (incrContraste * 0.1) / 25); |
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if (result > 255) |
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result = 255; |
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} |
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}else{ //incrContraste < 0
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if(px < 127){
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} else { // incrContraste < 0
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if (px < 127) {
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diferencia = 127 - px; |
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result = px + ((int)diferencia * (int)(-incrContraste * 0.1) / 25); |
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if(result > 127) result = 127; |
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if(px == 0 || px == 1) |
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if(incrContraste > -255) |
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result = px + ((int) diferencia * (int) (-incrContraste * 0.1) / 25); |
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if (result > 127) |
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result = 127; |
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if (px == 0 || px == 1) |
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if (incrContraste > -255) |
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result = 0; |
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} |
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if(px > 127){
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if (px > 127) {
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diferencia = px - 127; |
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result = px - ((int)diferencia * (int)(-incrContraste * 0.1) / 25); |
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if (result < 127) result = 127; |
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if(px == 255 || px == 254) |
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if(incrContraste > -255) |
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result = px - ((int) diferencia * (int) (-incrContraste * 0.1) / 25); |
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if (result < 127) |
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result = 127; |
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if (px == 255 || px == 254) |
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if (incrContraste > -255) |
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result = 255; |
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} |
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} |
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px = result; |
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return px; |
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} |
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/* |
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* (non-Javadoc) |
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* @see org.gvsig.raster.grid.filter.enhancement.ContrastFilter#process(int, int) |
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*/ |
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public void process(int col, int line) {
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for(int i = 0 ; i < raster.getBandCount() ; i++){
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for (int i = 0; i < raster.getBandCount(); i++) {
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int p = (raster.getElemByte(line, col, i) & 0x000000ff); |
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p = calcContrast(p); |
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raster.setElem(line, col, i, (byte)p);
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rasterResult.setElem(line, col, i, (byte) p);
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} |
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} |
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/* |
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* (non-Javadoc) |
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* @see org.gvsig.raster.grid.filter.enhancement.ContrastFilter#getInRasterDataType() |
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*/ |
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public int getInRasterDataType() {
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return RasterBuffer.TYPE_BYTE; |
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} |
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/* |
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* (non-Javadoc) |
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* @see org.gvsig.raster.grid.filter.enhancement.ContrastFilter#getOutRasterDataType() |
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*/ |
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public int getOutRasterDataType() {
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return RasterBuffer.TYPE_BYTE; |
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} |
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/* |
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* (non-Javadoc) |
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* @see org.gvsig.raster.grid.filter.enhancement.ContrastFilter#getResult(java.lang.String) |
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*/ |
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public Object getResult(String name) {
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if (name.equals("raster")) {
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return (Object) this.raster; |
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} else {
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return null; |
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} |
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if (name.equals("raster"))
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return (Object) this.rasterResult; |
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return null; |
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} |
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} |
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} |
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