Revision: 56324
http://sourceforge.net/p/brlcad/code/56324
Author: mohitdaga
Date: 2013-07-30 13:52:44 +0000 (Tue, 30 Jul 2013)
Log Message:
-----------
Adding new file libicv/crop.c. This will cropping functions. Adding icv_rect
api. This extracts any rectangular part of the image.
Modified Paths:
--------------
brlcad/trunk/include/icv.h
brlcad/trunk/src/libicv/CMakeLists.txt
Added Paths:
-----------
brlcad/trunk/src/libicv/crop.c
Modified: brlcad/trunk/include/icv.h
===================================================================
--- brlcad/trunk/include/icv.h 2013-07-30 11:32:08 UTC (rev 56323)
+++ brlcad/trunk/include/icv.h 2013-07-30 13:52:44 UTC (rev 56324)
@@ -145,8 +145,8 @@
/**
* Write an image line to the data of ICV struct. Can handle unsinged char
buffers.
*
- * Note : This function require memory allocation for ICV_UCHAR_DATA, which
inturn aquires
- * BU_SEM_SYSCALL semaphore.
+ * Note : This function require memory allocation for ICV_UCHAR_DATA, which
inturn aquires
+ * BU_SEM_SYSCALL semaphore.
*
* @param bif ICV struct where data is to be written
* @param y Index of the line at which data is to be written. 0 for the first
line
@@ -287,7 +287,29 @@
double gweight,
double bweight);
+/** @file libicv/crop.c
+ *
+ * This file contains functions for cropping images.
+ * There are two types of cropping rectangular and skeyed.
+ */
+/**
+ * This function crops an input image.
+ * Note : (0,0) corresponds to the Bottom Left of an Image.
+ *
+ * @param img Input image struct to be cropped.
+ * @param xorig X-Cordinate of offset of image to be extracted from.
+ * @param yorig Y-Cordinate of offset of image to be extracted from.
+ * @param xnum Legnth of the output image to be extracted from input
+ * data in horizontal direction.
+ * @param ynum Legnth of the output image to be extracted from input
+ * data in vertical direction.
+ * @return 0 on success.
+ */
+
+ICV_EXPORT extern int icv_rect(icv_image_t *img, int xorig, int yorig, int
xnum, int ynum);
+
+
/** @} */
/* end image utilities */
Modified: brlcad/trunk/src/libicv/CMakeLists.txt
===================================================================
--- brlcad/trunk/src/libicv/CMakeLists.txt 2013-07-30 11:32:08 UTC (rev
56323)
+++ brlcad/trunk/src/libicv/CMakeLists.txt 2013-07-30 13:52:44 UTC (rev
56324)
@@ -11,6 +11,7 @@
fileformat.c
rot.c
color_space.c
+ crop.c
)
BRLCAD_ADDLIB(libicv "${LIBICV_SOURCES}" "libbu;libbn;${PNG_LIBRARY}")
Added: brlcad/trunk/src/libicv/crop.c
===================================================================
--- brlcad/trunk/src/libicv/crop.c (rev 0)
+++ brlcad/trunk/src/libicv/crop.c 2013-07-30 13:52:44 UTC (rev 56324)
@@ -0,0 +1,80 @@
+/* C R O P . C
+ * BRL-CAD
+ *
+ * Copyright (c) 2013 United States Government as represented by
+ * the U.S. Army Research Laboratory.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * version 2.1 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this file; see the file named COPYING for more
+ * information.
+ */
+/** @file libicv/crop.c
+ *
+ * This file contains functions for cropping images.
+ * There are two types of cropping rectangular and skeyed.
+ *
+ */
+#include "bu.h"
+#include "icv.h"
+#include "vmath.h"
+
+int
+icv_rect(icv_image_t *img, int xorig, int yorig, int xnum, int ynum)
+{
+ int row;
+ double *p, *in_data, *out_data;
+ int widthstep_in, widthstep_out, bytes_row; /**< */
+
+ if (!ICV_IMAGE_IS_INITIALIZED(img)) {
+ bu_log("ERROR: trying to crop a null image\n");
+ return -1;
+ }
+
+ if (xorig < 0)
+ xorig = 0;
+
+ if (yorig < 0)
+ yorig = 0;
+
+ if (xnum <= 0)
+ bu_exit(1, "icv_rect : ERROR: Horizontal Cut Size\n");
+
+ if (ynum <= 0)
+ bu_exit(1, "icv_rect : ERROR: Horizontal Cut Size\n");
+
+ if (xorig+xnum > img->width)
+ bu_exit(1, "icv_rect : Cut not possible, Input parameters exceeds the
width\n");
+
+ if (yorig+ynum > img->height)
+ bu_exit(1, "icv_rect : Cut not possible, Input parameters exceeds the
height\n");
+
+ /* initialization of variables to insure cropping and copying */
+ widthstep_in = img->width*img->channels;
+ widthstep_out = xnum*img->channels;
+ bytes_row = widthstep_out*sizeof(double);
+ out_data = p = bu_malloc(ynum*bytes_row,"icv_rect : Cropped Image Data" );
+
+ /* Hopes to the initial point to be extracted on the first line */
+ in_data = img->data + xorig*img->channels;
+
+ for (row = yorig; row < yorig+ynum ;row++) {
+ VMOVEN(p,in_data,widthstep_out);
+ in_data += widthstep_in;
+ p += widthstep_out;
+ }
+
+ bu_free(img->data, "icv image input data");
+ img->width = xnum;
+ img->height = ynum;
+ img->data = out_data;
+ return 0;
+}
Property changes on: brlcad/trunk/src/libicv/crop.c
___________________________________________________________________
Added: svn:mime-type
## -0,0 +1 ##
+text/plain
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Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
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