From a6df67e8bcd5159cde27556f4f6a315f8dc2215f Mon Sep 17 00:00:00 2001
From: shamikam
Date: Mon, 16 Jan 2017 02:56:17 +0530
Subject: First Commit

---
 macros/IDCT.sci | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 macros/IDCT.sci

(limited to 'macros/IDCT.sci')

diff --git a/macros/IDCT.sci b/macros/IDCT.sci
new file mode 100644
index 0000000..217b00c
--- /dev/null
+++ b/macros/IDCT.sci
@@ -0,0 +1,46 @@
+function new_image = IDCT(image)
+// Compute inverse Discrete Transform of image
+//
+// Calling Sequence
+// newimage = IDCT(image)
+//
+// Parameters
+// image : floating-point image
+// newimage : IDCT of the input image
+//
+// Description
+// The IDCT function computes the inverse cosine transform of a floating-point image with even number of rows and columns.
+//
+// Examples
+// I = imread('cameraman.tif')
+// I = double(I)
+// J = IDCT(I)
+// imshow(J)
+//
+// Authors
+// Suraj Prakash
+	
+	[rows, cols, channel] = size(image);
+	
+	if (modulo(rows, 2) <> 0) & (modulo(cols, 2) <> 0) then
+		error(msprintf("Image doesnot have even number of rows and columns\n"));
+	elseif (modulo(rows, 2)) <> 0 then
+		error(msprintf("Image doesnot have even number of rows\n"));
+	elseif (modulo(cols, 2)) <> 0 then
+		error(msprintf("Image doesnot have even number of cols\n"));
+	end
+	
+	if channel > 1 then
+		error(msprintf("Input image should be single channel"));
+	end
+	image_list = mattolist(image)
+	
+	out = opencv_IDCT(image_list)
+	
+	length_out = size(out)
+	
+	for i = 1 : length_out
+		new_image(:, :, i) = out(i)
+	end
+	
+endfunction
-- 
cgit