Small changes in cleanpdf and croppdf

prog/cleanpdf.c

@@ -61,8 +61,9 @@
  *
  *    The %contrast parameter adjusts the binarization to avoid losing input
  *    details that are too light.  It takes on 10 values from 1 to 10, where
- *    1 is the lightest value and it removes noise.  Suggested value is 1
- *    unless important details are lost on binarization.
+ *    1 is the lightest value and it removes noise.  Use of 0 will default
+ *    to 1.  Suggested value is 1 unless important details are lost on
+ *    binarization.
  *
  *    The %rotation parameter is an integer that specifies the rotation
  *    to be applied to each image:
@@ -173,6 +174,7 @@ SARRAY  *sa;
                 __func__, res);
         return 1;
     }
+    if (contrast == 0) contrast = 1;
     if (contrast < 1 || contrast > 10) {
         L_ERROR("invalid contrast = %d; contrast must be in {1,...,10}\n",
                 __func__, contrast);

src/pageseg.c

@@ -583,6 +583,7 @@ pixCropImage(PIX         *pixs,
 char       cmd[64];
 l_int32    w, h, d, lrc, tbc, val;
 l_int32    left, right, top, bot, leftfinal, rightfinal, topfinal, botfinal;
+static l_int32    first_time = TRUE;
 l_float32  hscale;
 PIX       *pix1, *pix2, *pix3;
 PIXA      *pixa1;
@@ -676,6 +677,10 @@ BOX       *box1, *box2;
     if (hscale > 1.0 && maxwiden > 1.0) {
         hscale = L_MIN(hscale, maxwiden);
         pix3 = pixScale(pix2, hscale, 1.0);
+        if (first_time == TRUE) {
+            lept_stderr("Widening page by factor %5.3f\n", hscale);
+            first_time = FALSE;
+        }
     } else {
         pix3 = pixClone(pix2);
     }