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<h1>tilt.h File Reference</h1>
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This graph shows which files directly or indirectly include this file:</div>
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<a href="tilt_8h_source.html">Go to the source code of this file.</a><table border="0" cellpadding="0" cellspacing="0">
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<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">QImage * </td><td class="memItemRight" valign="bottom"><a class="el" href="tilt_8h.html#11568e88ec7c20a6b276512e8bc6b631">correctImageTilt</a> (QString filename, QPoint p1, QPoint p2, <a class="el" href="classStatusWidget.html">StatusWidget</a> *<a class="el" href="redEye__internal_8h.html#65b682074aef9e63bb1dad48c3e9e9df">status</a>)</td></tr>
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<hr><h2>Function Documentation</h2>
<a class="anchor" name="11568e88ec7c20a6b276512e8bc6b631"></a><!-- doxytag: member="tilt.h::correctImageTilt" ref="11568e88ec7c20a6b276512e8bc6b631" args="(QString filename, QPoint p1, QPoint p2, StatusWidget *status)" -->
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<td class="memname">QImage* correctImageTilt </td>
<td>(</td>
<td class="paramtype">QString </td>
<td class="paramname"> <em>filename</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">QPoint </td>
<td class="paramname"> <em>p1</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">QPoint </td>
<td class="paramname"> <em>p2</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classStatusWidget.html">StatusWidget</a> * </td>
<td class="paramname"> <em>status</em></td><td> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<p>
<p>Definition at line <a class="el" href="tilt_8cpp_source.html#l00100">100</a> of file <a class="el" href="tilt_8cpp_source.html">tilt.cpp</a>.</p>
<p>References <a class="el" href="redEye__internal_8h_source.html#l00042">bottomRight</a>, <a class="el" href="redEye__internal_8h_source.html#l00037">editedImage</a>, <a class="el" href="tilt_8cpp_source.html#l00367">findTwoLineIntersection()</a>, <a class="el" href="statusWidget_8cpp_source.html#l00119">StatusWidget::incrementProgress()</a>, <a class="el" href="tilt_8cpp_source.html#l00312">interpolatedPixelValue()</a>, <a class="el" href="redEye__internal_8h_source.html#l00031">newProgress</a>, <a class="el" href="statusWidget_8cpp_source.html#l00125">StatusWidget::setStatus()</a>, <a class="el" href="statusWidget_8cpp_source.html#l00089">StatusWidget::showProgressBar()</a>, <a class="el" href="redEye__internal_8h_source.html#l00042">topLeft</a>, <a class="el" href="redEye__internal_8h_source.html#l00028">updateIncrement</a>, <a class="el" href="tilt_8cpp_source.html#l00456">DPoint::x()</a>, and <a class="el" href="tilt_8cpp_source.html#l00457">DPoint::y()</a>.</p>
<p>Referenced by <a class="el" href="editingInterface_8cpp_source.html#l01215">EditingInterface::finishCorrectTilt()</a>.</p>
<div class="fragment"><pre class="fragment"><a name="l00102"></a>00102 {
<a name="l00103"></a>00103 <span class="comment">//first compute distance between two points or "radius"</span>
<a name="l00104"></a>00104 <span class="keywordtype">int</span> dx = p2.x() - p1.x();
<a name="l00105"></a>00105 <span class="keywordtype">int</span> dy = p2.y() - p1.y();
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="comment">//determine tilt angle</span>
<a name="l00108"></a>00108 <span class="keywordtype">int</span> delta = 0;
<a name="l00109"></a>00109
<a name="l00110"></a>00110 <span class="comment">//compute recirpocal of distance between points</span>
<a name="l00111"></a>00111 <span class="keywordtype">double</span> recip_r = 1.0 / sqrt( (<span class="keywordtype">double</span>) (dx*dx + dy*dy) );
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="comment">//compute angle with horizontal axis</span>
<a name="l00114"></a>00114 <span class="keywordflow">if</span>( QABS(dx) > QABS(dy) )
<a name="l00115"></a>00115 {
<a name="l00116"></a>00116 delta = dy;
<a name="l00117"></a>00117 <span class="keywordflow">if</span>(dx > 0) delta = -delta;
<a name="l00118"></a>00118 }
<a name="l00119"></a>00119 <span class="comment">//compute angle with vertical axis</span>
<a name="l00120"></a>00120 <span class="keywordflow">else</span>
<a name="l00121"></a>00121 {
<a name="l00122"></a>00122 delta = dx;
<a name="l00123"></a>00123 <span class="keywordflow">if</span>(dy < 0) delta = -delta;
<a name="l00124"></a>00124 }
<a name="l00125"></a>00125
<a name="l00126"></a>00126 <span class="keywordtype">double</span> sinTheta = (delta * recip_r);
<a name="l00127"></a>00127 <span class="keywordtype">double</span> theta = asin( sinTheta );
<a name="l00128"></a>00128 <span class="keywordtype">double</span> cosTheta = cos( theta );
<a name="l00129"></a>00129
<a name="l00130"></a>00130 <span class="comment">//if angle is 0 (improbable but possible) then quit now</span>
<a name="l00131"></a>00131 <span class="keywordflow">if</span>( theta == 0 )
<a name="l00132"></a>00132 <span class="keywordflow">return</span> NULL;
<a name="l00133"></a>00133
<a name="l00134"></a>00134 <span class="comment">//load original and edited images</span>
<a name="l00135"></a>00135 QImage originalImage( filename );
<a name="l00136"></a>00136
<a name="l00137"></a>00137 <span class="comment">//convert to 32-bit depth if necessary</span>
<a name="l00138"></a>00138 <span class="keywordflow">if</span>( originalImage.depth() < 32 ) { originalImage = originalImage.convertDepth( 32, Qt::AutoColor ); }
<a name="l00139"></a>00139
<a name="l00140"></a>00140 QImage rotatedImage( originalImage.width(), originalImage.height(), originalImage.depth() );
<a name="l00141"></a>00141
<a name="l00142"></a>00142 <span class="comment">//setup progress bar</span>
<a name="l00143"></a>00143 QString statusMessage = qApp->translate( <span class="stringliteral">"correctImageTilt"</span>, <span class="stringliteral">"Correcting Tilt:"</span> );
<a name="l00144"></a>00144 status-><a class="code" href="classStatusWidget.html#57d461014070b9d651c36bd157cab9c1" title="Initializes the progress bar.">showProgressBar</a>( statusMessage, 200 );
<a name="l00145"></a>00145 qApp->processEvents();
<a name="l00146"></a>00146
<a name="l00147"></a>00147 <span class="comment">//during the first phase update the status bar for every 1% of image pixels that are processed</span>
<a name="l00148"></a>00148 <span class="keywordtype">int</span> <a class="code" href="redEye__internal_8h.html#32598f506d413f48cda8e1c930dae6b3">updateIncrement</a> = (int) ( 0.01 * originalImage.width() * originalImage.height() );
<a name="l00149"></a>00149 <span class="keywordtype">int</span> <a class="code" href="redEye__internal_8h.html#caa08422437cae250a76ca488cbe1567">newProgress</a> = 0;
<a name="l00150"></a>00150
<a name="l00151"></a>00151 <span class="comment">//set each pixel to the rotated value</span>
<a name="l00152"></a>00152 <span class="keywordtype">double</span> xp, yp;
<a name="l00153"></a>00153
<a name="l00154"></a>00154 <span class="keywordtype">double</span> w2 = 0.5 * rotatedImage.width();
<a name="l00155"></a>00155 <span class="keywordtype">double</span> h2 = 0.5 * rotatedImage.height();
<a name="l00156"></a>00156
<a name="l00157"></a>00157 <span class="keywordtype">int</span> x,y;
<a name="l00158"></a>00158 uchar* scanLine;
<a name="l00159"></a>00159 QRgb* rgb;
<a name="l00160"></a>00160 <span class="keywordflow">for</span>( y=0; y<rotatedImage.height(); y++)
<a name="l00161"></a>00161 {
<a name="l00162"></a>00162 <span class="comment">//iterate over each selected pixel in scanline</span>
<a name="l00163"></a>00163 scanLine = rotatedImage.scanLine(y);
<a name="l00164"></a>00164 <span class="keywordflow">for</span>( x=0; x<rotatedImage.width(); x++)
<a name="l00165"></a>00165 {
<a name="l00166"></a>00166 <span class="comment">//compute unrotated coordinates</span>
<a name="l00167"></a>00167 xp = cosTheta*(x-w2) + sinTheta*(y-h2) + w2;
<a name="l00168"></a>00168 yp = -sinTheta*(x-w2) + cosTheta*(y-h2) + h2;
<a name="l00169"></a>00169
<a name="l00170"></a>00170 <span class="comment">//set unrotated value</span>
<a name="l00171"></a>00171 rgb = ((QRgb*)scanLine+x);
<a name="l00172"></a>00172 *rgb = <a class="code" href="tilt_8cpp.html#3f1d83198a2abb32c2a9e8c7bfb4772e">interpolatedPixelValue</a>( xp, yp, &originalImage);
<a name="l00173"></a>00173
<a name="l00174"></a>00174 <span class="comment">//update status bar if significant progress has been made since last update</span>
<a name="l00175"></a>00175 newProgress++;
<a name="l00176"></a>00176 <span class="keywordflow">if</span>(newProgress >= updateIncrement)
<a name="l00177"></a>00177 {
<a name="l00178"></a>00178 newProgress = 0;
<a name="l00179"></a>00179 status-><a class="code" href="classStatusWidget.html#de18735223ae40506c32c96b9c9c5476" title="Updates the progress bar by one step.">incrementProgress</a>();
<a name="l00180"></a>00180 qApp->processEvents();
<a name="l00181"></a>00181 }
<a name="l00182"></a>00182
<a name="l00183"></a>00183 }
<a name="l00184"></a>00184 }
<a name="l00185"></a>00185
<a name="l00186"></a>00186 <span class="comment">//find rotated corners</span>
<a name="l00187"></a>00187 <span class="keywordtype">double</span> nTheta = -theta;
<a name="l00188"></a>00188 <span class="keywordtype">double</span> sinNTheta = sin( nTheta );
<a name="l00189"></a>00189 <span class="keywordtype">double</span> cosNTheta = cos( nTheta );
<a name="l00190"></a>00190
<a name="l00191"></a>00191 <a class="code" href="classDPoint.html">DPoint</a> <a class="code" href="redEye__internal_8h.html#6a9aebec61b1a6732045c187a6156f4f">topLeft</a> = <a class="code" href="classDPoint.html">DPoint</a>( cosNTheta*(-w2) + sinNTheta*(-h2) + w2,
<a name="l00192"></a>00192 -sinNTheta*(-w2) + cosNTheta*(-h2) + h2 );
<a name="l00193"></a>00193
<a name="l00194"></a>00194 <a class="code" href="classDPoint.html">DPoint</a> topRight = <a class="code" href="classDPoint.html">DPoint</a>( cosNTheta*(w2) + sinNTheta*(-h2) + w2,
<a name="l00195"></a>00195 -sinNTheta*(w2) + cosNTheta*(-h2) + h2 );
<a name="l00196"></a>00196
<a name="l00197"></a>00197 <a class="code" href="classDPoint.html">DPoint</a> bottomLeft = <a class="code" href="classDPoint.html">DPoint</a>( cosNTheta*(-w2) + sinNTheta*(h2) + w2,
<a name="l00198"></a>00198 -sinNTheta*(-w2) + cosNTheta*(h2) + h2 );
<a name="l00199"></a>00199
<a name="l00200"></a>00200 <a class="code" href="classDPoint.html">DPoint</a> <a class="code" href="redEye__internal_8h.html#75e80edb449bc9a0925be60719132bd0">bottomRight</a> = <a class="code" href="classDPoint.html">DPoint</a>( cosNTheta*(w2) + sinNTheta*(h2) + w2,
<a name="l00201"></a>00201 -sinNTheta*(w2) + cosNTheta*(h2) + h2 );
<a name="l00202"></a>00202
<a name="l00203"></a>00203 <span class="comment">//determine which of these points are which in their rotated form</span>
<a name="l00204"></a>00204 <a class="code" href="classDPoint.html">DPoint</a> top, bottom, left, right;
<a name="l00205"></a>00205 <span class="keywordflow">if</span>( theta < 0 )
<a name="l00206"></a>00206 {
<a name="l00207"></a>00207 top = topRight;
<a name="l00208"></a>00208 bottom = bottomLeft;
<a name="l00209"></a>00209 left = topLeft;
<a name="l00210"></a>00210 right = bottomRight;
<a name="l00211"></a>00211 }
<a name="l00212"></a>00212 <span class="keywordflow">else</span>
<a name="l00213"></a>00213 {
<a name="l00214"></a>00214 top = topLeft;
<a name="l00215"></a>00215 bottom = bottomRight;
<a name="l00216"></a>00216 left = bottomLeft;
<a name="l00217"></a>00217 right = topRight;
<a name="l00218"></a>00218 }
<a name="l00219"></a>00219
<a name="l00220"></a>00220 <span class="comment">//construct true corners</span>
<a name="l00221"></a>00221 <a class="code" href="classDPoint.html">DPoint</a> trueTopLeft ( 0, 0 );
<a name="l00222"></a>00222 <a class="code" href="classDPoint.html">DPoint</a> trueTopRight ( rotatedImage.width()-1, 0 );
<a name="l00223"></a>00223 <a class="code" href="classDPoint.html">DPoint</a> trueBottomLeft ( 0, rotatedImage.height()-1 );
<a name="l00224"></a>00224 <a class="code" href="classDPoint.html">DPoint</a> trueBottomRight( rotatedImage.width()-1, rotatedImage.height()-1 );
<a name="l00225"></a>00225
<a name="l00226"></a>00226 <span class="comment">//find intersections with image boundary</span>
<a name="l00227"></a>00227 <a class="code" href="classDPoint.html">DPoint</a> topEdgeL = <a class="code" href="tilt_8cpp.html#64cdd4694c2d057ef599ab1360ff62c1">findTwoLineIntersection</a>( left, top, trueTopLeft, trueTopRight );
<a name="l00228"></a>00228 <a class="code" href="classDPoint.html">DPoint</a> topEdgeR = <a class="code" href="tilt_8cpp.html#64cdd4694c2d057ef599ab1360ff62c1">findTwoLineIntersection</a>( top, right, trueTopLeft, trueTopRight );
<a name="l00229"></a>00229
<a name="l00230"></a>00230 <a class="code" href="classDPoint.html">DPoint</a> bottomEdgeL = <a class="code" href="tilt_8cpp.html#64cdd4694c2d057ef599ab1360ff62c1">findTwoLineIntersection</a>( left, bottom, trueBottomLeft, trueBottomRight );
<a name="l00231"></a>00231 <a class="code" href="classDPoint.html">DPoint</a> bottomEdgeR = <a class="code" href="tilt_8cpp.html#64cdd4694c2d057ef599ab1360ff62c1">findTwoLineIntersection</a>( bottom, right, trueBottomLeft, trueBottomRight );
<a name="l00232"></a>00232
<a name="l00233"></a>00233 <a class="code" href="classDPoint.html">DPoint</a> leftEdgeT = <a class="code" href="tilt_8cpp.html#64cdd4694c2d057ef599ab1360ff62c1">findTwoLineIntersection</a>( left, top, trueTopLeft, trueBottomLeft );
<a name="l00234"></a>00234 <a class="code" href="classDPoint.html">DPoint</a> leftEdgeB = <a class="code" href="tilt_8cpp.html#64cdd4694c2d057ef599ab1360ff62c1">findTwoLineIntersection</a>( left, bottom, trueTopLeft, trueBottomLeft );
<a name="l00235"></a>00235
<a name="l00236"></a>00236 <a class="code" href="classDPoint.html">DPoint</a> rightEdgeT = <a class="code" href="tilt_8cpp.html#64cdd4694c2d057ef599ab1360ff62c1">findTwoLineIntersection</a>( right, top, trueTopRight, trueBottomRight );
<a name="l00237"></a>00237 <a class="code" href="classDPoint.html">DPoint</a> rightEdgeB = <a class="code" href="tilt_8cpp.html#64cdd4694c2d057ef599ab1360ff62c1">findTwoLineIntersection</a>( right, bottom, trueTopRight, trueBottomRight );
<a name="l00238"></a>00238
<a name="l00239"></a>00239 <span class="comment">//shot rays out from image center to each true corner and find intersections with clipped corners</span>
<a name="l00240"></a>00240 <a class="code" href="classDPoint.html">DPoint</a> center( (<span class="keywordtype">int</span>)w2, (<span class="keywordtype">int</span>)h2 );
<a name="l00241"></a>00241 <a class="code" href="classDPoint.html">DPoint</a> safeTopLeft = <a class="code" href="tilt_8cpp.html#64cdd4694c2d057ef599ab1360ff62c1">findTwoLineIntersection</a>( center, trueTopLeft, leftEdgeT, topEdgeL );
<a name="l00242"></a>00242 <a class="code" href="classDPoint.html">DPoint</a> safeTopRight = <a class="code" href="tilt_8cpp.html#64cdd4694c2d057ef599ab1360ff62c1">findTwoLineIntersection</a>( center, trueTopRight, rightEdgeT, topEdgeR );
<a name="l00243"></a>00243 <a class="code" href="classDPoint.html">DPoint</a> safeBottomLeft = <a class="code" href="tilt_8cpp.html#64cdd4694c2d057ef599ab1360ff62c1">findTwoLineIntersection</a>( center, trueBottomLeft, leftEdgeB, bottomEdgeL );
<a name="l00244"></a>00244 <a class="code" href="classDPoint.html">DPoint</a> safeBottomRight = <a class="code" href="tilt_8cpp.html#64cdd4694c2d057ef599ab1360ff62c1">findTwoLineIntersection</a>( center, trueBottomRight, rightEdgeB, bottomEdgeR );
<a name="l00245"></a>00245
<a name="l00246"></a>00246 <span class="comment">//find constrained area</span>
<a name="l00247"></a>00247 <span class="keywordtype">double</span> minY = QMAX( safeTopLeft.<a class="code" href="classDPoint.html#fefa46a0d128b45349fe6b05526205ad">y</a>(), safeTopRight.<a class="code" href="classDPoint.html#fefa46a0d128b45349fe6b05526205ad">y</a>() );
<a name="l00248"></a>00248 <span class="keywordtype">double</span> maxY = QMIN( safeBottomLeft.<a class="code" href="classDPoint.html#fefa46a0d128b45349fe6b05526205ad">y</a>(), safeBottomRight.<a class="code" href="classDPoint.html#fefa46a0d128b45349fe6b05526205ad">y</a>() );
<a name="l00249"></a>00249
<a name="l00250"></a>00250 <span class="keywordtype">double</span> minX = QMAX( safeTopLeft.<a class="code" href="classDPoint.html#77c659dcf610ea320fd46ab7bf338851">x</a>(), safeBottomLeft.<a class="code" href="classDPoint.html#77c659dcf610ea320fd46ab7bf338851">x</a>() );
<a name="l00251"></a>00251 <span class="keywordtype">double</span> maxX = QMIN( safeTopRight.<a class="code" href="classDPoint.html#77c659dcf610ea320fd46ab7bf338851">x</a>(), safeBottomRight.<a class="code" href="classDPoint.html#77c659dcf610ea320fd46ab7bf338851">x</a>() );
<a name="l00252"></a>00252
<a name="l00253"></a>00253 <span class="comment">//find contrained area in integer coordinates. this is semi-tricky.</span>
<a name="l00254"></a>00254 <span class="comment">//if the minimum values decimal porition is nonzero then increment by one </span>
<a name="l00255"></a>00255 <span class="comment">// (eg 5.37 -> 6)</span>
<a name="l00256"></a>00256 <span class="keywordtype">int</span> xMin = (int) minX;
<a name="l00257"></a>00257 <span class="keywordtype">int</span> xMax = (int) maxX;
<a name="l00258"></a>00258
<a name="l00259"></a>00259 <span class="keywordtype">int</span> yMin = (int) minY;
<a name="l00260"></a>00260 <span class="keywordtype">int</span> yMax = (int) maxY;
<a name="l00261"></a>00261
<a name="l00262"></a>00262 <span class="keywordflow">if</span>( xMin < minX ) xMin++;
<a name="l00263"></a>00263 <span class="keywordflow">if</span>( yMin < minY ) yMin++;
<a name="l00264"></a>00264
<a name="l00265"></a>00265 <span class="comment">//construct cropped rotated image</span>
<a name="l00266"></a>00266 QImage* <a class="code" href="redEye__internal_8h.html#63116a8b94b4ed0e99ddcb7f6f3bd919">editedImage</a> = <span class="keyword">new</span> QImage( xMax - xMin + 1,
<a name="l00267"></a>00267 yMax - yMin + 1,
<a name="l00268"></a>00268 rotatedImage.depth() );
<a name="l00269"></a>00269
<a name="l00270"></a>00270 <span class="comment">//during the second phase update the status bar for every 1% of cropped pixels that are procesed</span>
<a name="l00271"></a>00271 updateIncrement = (int) ( 0.01 * editedImage->width() * editedImage->height() );
<a name="l00272"></a>00272 newProgress = 0;
<a name="l00273"></a>00273
<a name="l00274"></a>00274 <span class="keywordtype">int</span> x2,y2;
<a name="l00275"></a>00275 uchar* scanLine2;
<a name="l00276"></a>00276 QRgb* rgb2;
<a name="l00277"></a>00277
<a name="l00278"></a>00278 y2 = 0;
<a name="l00279"></a>00279 <span class="keywordflow">for</span>( y=yMin; y<=yMax; y++, y2++)
<a name="l00280"></a>00280 {
<a name="l00281"></a>00281 <span class="comment">//iterate over each selected pixel in scanline</span>
<a name="l00282"></a>00282 scanLine = rotatedImage.scanLine(y);
<a name="l00283"></a>00283 scanLine2 = editedImage->scanLine(y2);
<a name="l00284"></a>00284
<a name="l00285"></a>00285 x2 = 0;
<a name="l00286"></a>00286 <span class="keywordflow">for</span>( x=xMin; x<=xMax; x++, x2++)
<a name="l00287"></a>00287 {
<a name="l00288"></a>00288 rgb = ((QRgb*)scanLine +x );
<a name="l00289"></a>00289 rgb2 = ((QRgb*)scanLine2+x2);
<a name="l00290"></a>00290 *rgb2 = *rgb;
<a name="l00291"></a>00291
<a name="l00292"></a>00292 <span class="comment">//update status bar if significant progress has been made since last update</span>
<a name="l00293"></a>00293 newProgress++;
<a name="l00294"></a>00294 <span class="keywordflow">if</span>(newProgress >= updateIncrement)
<a name="l00295"></a>00295 {
<a name="l00296"></a>00296 newProgress = 0;
<a name="l00297"></a>00297 status-><a class="code" href="classStatusWidget.html#de18735223ae40506c32c96b9c9c5476" title="Updates the progress bar by one step.">incrementProgress</a>();
<a name="l00298"></a>00298 qApp->processEvents();
<a name="l00299"></a>00299 }
<a name="l00300"></a>00300
<a name="l00301"></a>00301 }
<a name="l00302"></a>00302 }
<a name="l00303"></a>00303
<a name="l00304"></a>00304 <span class="comment">//remove status bar</span>
<a name="l00305"></a>00305 status-><a class="code" href="classStatusWidget.html#02084869ff1c15dab4bc922a49b31808" title="Update message.">setStatus</a>( <span class="stringliteral">""</span> );
<a name="l00306"></a>00306 qApp->processEvents();
<a name="l00307"></a>00307
<a name="l00308"></a>00308 <span class="comment">//return pointer to edited image</span>
<a name="l00309"></a>00309 <span class="keywordflow">return</span> editedImage;
<a name="l00310"></a>00310 }
</pre></div>
<p>
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distrib
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Mandriva
>
2010.0
>
i586
>
media
>
contrib-release
>
by-pkgid
>
4f45e7bdfd4a5ff17f5f8eaab90d017f
>
files
>
1710
