Pix* livreAdapt(Pix* pixs){
Pix* pixg, *pix1;
/* Normalize for uneven illumination on gray image. */
pixBackgroundNormGrayArrayMorph(pixs, NULL, 4, 5, 200, &pixg);
pix1 = pixApplyInvBackgroundGrayMap(pixs, pixg, 4, 4);
pixDestroy(&pixg);
return pix1;
}
/*
* Binarize and fix uneven illumination
*/
void MainWindow::on_actionBinarizeUnIl_triggered() {
QApplication::setOverrideCursor(Qt::WaitCursor);
PIX *pixc, *pixg, *pixsg, *pixd;
/* Convert the RGB image to grayscale. */
this->statusBar()->showMessage(tr("Convert the RGB image to grayscale."));
pixsg = pixConvertRGBToLuminance(pixs);
setPixToScene(pixsg);
/* Remove the text in the fg. */
this->statusBar()->showMessage(tr("Remove the text in the fg."));
pixc = pixCloseGray(pixsg, 25, 25);
setPixToScene(pixc);
/* Smooth the bg with a convolution. */
// pixsm = pixBlockconv(pixc, 15, 15);
// pixDestroy(&pixsm);
/* Normalize for uneven illumination on gray image. */
this->statusBar()->showMessage(tr("Normalize for uneven illumination on gray image."));
pixBackgroundNormGrayArrayMorph(pixsg, NULL, 4, 5, 200, &pixg);
pixc = pixApplyInvBackgroundGrayMap(pixsg, pixg, 4, 4);
pixDestroy(&pixsg);
pixDestroy(&pixg);
setPixToScene(pixc);
/* Increase the dynamic range. */
// make dark gray *black* and light gray *white*
this->statusBar()->showMessage(tr("Increase the dynamic range."));
pixd = pixGammaTRC(NULL, pixc, 1.0, 50, 220);
setPixToScene(pixd);
/* Threshold to 1 bpp. */
this->statusBar()->showMessage(tr("Threshold to 1 bpp."));
pixs = pixThresholdToBinary(pixd, 120);
pixDestroy(&pixd);
setPixToScene();
this->statusBar()->showMessage(tr("Finished..."), 2000);
modified = true;
updateTitle();
QApplication::restoreOverrideCursor();
}
main(int argc,
char **argv)
{
l_int32 d;
PIX *pixs, *pixc, *pixr, *pixg, *pixb, *pixsg, *pixsm, *pixd;
PIXA *pixa;
static char mainName[] = "livre_adapt";
if (argc != 1)
exit(ERROR_INT(" Syntax: livre_adapt", mainName, 1));
/* Read the image in at 150 ppi. */
pixDisplayWrite(NULL, -1);
if ((pixs = pixRead("brothers.150.jpg")) == NULL)
exit(ERROR_INT("pix not made", mainName, 1));
pixDisplayWriteFormat(pixs, 2, IFF_JFIF_JPEG);
/* Normalize for uneven illumination on RGB image */
pixBackgroundNormRGBArraysMorph(pixs, NULL, 4, 5, 200,
&pixr, &pixg, &pixb);
pixd = pixApplyInvBackgroundRGBMap(pixs, pixr, pixg, pixb, 4, 4);
pixDisplayWriteFormat(pixd, 2, IFF_JFIF_JPEG);
pixDestroy(&pixr);
pixDestroy(&pixg);
pixDestroy(&pixb);
pixDestroy(&pixd);
/* Convert the RGB image to grayscale. */
pixsg = pixConvertRGBToLuminance(pixs);
pixDisplayWriteFormat(pixsg, 2, IFF_JFIF_JPEG);
/* Remove the text in the fg. */
pixc = pixCloseGray(pixsg, 25, 25);
pixDisplayWriteFormat(pixc, 2, IFF_JFIF_JPEG);
/* Smooth the bg with a convolution. */
pixsm = pixBlockconv(pixc, 15, 15);
pixDisplayWriteFormat(pixsm, 2, IFF_JFIF_JPEG);
pixDestroy(&pixc);
/* Normalize for uneven illumination on gray image. */
pixBackgroundNormGrayArrayMorph(pixsg, NULL, 4, 5, 200, &pixg);
pixc = pixApplyInvBackgroundGrayMap(pixsg, pixg, 4, 4);
pixDisplayWriteFormat(pixc, 2, IFF_JFIF_JPEG);
pixDestroy(&pixg);
/* Increase the dynamic range. */
pixd = pixGammaTRC(NULL, pixc, 1.0, 30, 180);
pixDisplayWriteFormat(pixd, 2, IFF_JFIF_JPEG);
pixDestroy(&pixc);
/* Threshold to 1 bpp. */
pixb = pixThresholdToBinary(pixd, 120);
pixDisplayWriteFormat(pixb, 2, IFF_PNG);
pixDestroy(&pixd);
pixDestroy(&pixb);
/* Generate the output image */
pixa = pixaReadFiles("/tmp", "junk_write_display");
pixd = pixaDisplayTiledAndScaled(pixa, 8, 350, 4, 0, 25, 2);
pixWrite("/tmp/adapt.jpg", pixd, IFF_JFIF_JPEG);
pixDisplayWithTitle(pixd, 100, 100, NULL, 1);
pixDestroy(&pixd);
pixDestroy(&pixs);
pixDestroy(&pixsg);
return 0;
}