diff --git a/.Rbuildignore b/.Rbuildignore
index 2f8584e..7ef2c2f 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -7,14 +7,6 @@
 ^\.Rproj\.user$
 ^windows$
 ^README.md$
-^src/option_table.h$
 ^src/Makevars$
-^tools/option_table.txt$
-^R/sysdata.rda$
-^src/*.def$
 ^appveyor\.yml$
-^revdep$
-^docker$
-^httpbin.md$
-^examples$
-^release.R$
+^LICENSE\.md$
diff --git a/DESCRIPTION b/DESCRIPTION
index 5445f78..7846313 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: opencv
 Type: Package
 Title: Bindings to OpenCV
-Version: 0.0
+Version: 0.1
 Authors@R: c(
     person("Jeroen", "Ooms", role = c("aut", "cre"), email = "jeroen@berkeley.edu",
       comment = c(ORCID = "0000-0002-4035-0289")))
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..8b5d4b0
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,2 @@
+YEAR: 2018
+COPYRIGHT HOLDER: Jeroen Ooms
diff --git a/LICENSE.md b/LICENSE.md
new file mode 100644
index 0000000..bebab97
--- /dev/null
+++ b/LICENSE.md
@@ -0,0 +1,21 @@
+# MIT License
+
+Copyright (c) 2018 Jeroen Ooms
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/R/opencv.R b/R/opencv.R
index cf5d614..4cc0e29 100644
--- a/R/opencv.R
+++ b/R/opencv.R
@@ -1,11 +1,12 @@
 #' OpenCV
 #'
-#' Utilities to read and write images with OpenCV.s
+#' Utilities to read and write images with OpenCV.
 #'
 #' @export
 #' @rdname opencv
 #' @importFrom Rcpp sourceCpp
 #' @useDynLib opencv
+#' @param path image file such as png or jpeg
 ocv_read <- function(path){
   path <- normalizePath(path, mustWork = TRUE)
   cvmat_read(path)
@@ -13,6 +14,7 @@ ocv_read <- function(path){
 
 #' @export
 #' @rdname opencv
+#' @param image a ocv image object
 ocv_write <- function(image, path){
   path <- normalizePath(path, mustWork = FALSE)
   cvmat_write(image, path)
@@ -37,8 +39,6 @@ ocv_camera <- function(){
 }
 
 #' @export
-#' @rdname opencv
-#' @param x passed to [print]
 `print.opencv-image` <- function(x, ...){
   viewer <- getOption("viewer")
   is_knit_image <- isTRUE(getOption('knitr.in.progress'))
@@ -47,11 +47,14 @@ ocv_camera <- function(){
     ocv_write(x, path = tmp)
     viewer(tmp)
   }
+  base::print.default(x)
   #TODO: copy from magick
 }
 
 #' @export
 #' @rdname opencv
+#' @param width output width in pixels
+#' @param height output height in pixels
 ocv_resize <- function(image, width = 0, height = 0){
   cvmat_resize(image, as.integer(width), as.integer(height))
 }
@@ -76,6 +79,7 @@ ocv_knn <- function(image){
 
 #' @export
 #' @rdname opencv
+#' @param filter an R function that takes and returns an opecv image
 ocv_video <- function(filter){
   if(!is.function(filter))
     stop("Filter must be a function")
diff --git a/man/opencv.Rd b/man/opencv.Rd
index 14a9a59..4705060 100644
--- a/man/opencv.Rd
+++ b/man/opencv.Rd
@@ -6,7 +6,6 @@
 \alias{ocv_bitmap}
 \alias{ocv_edges}
 \alias{ocv_camera}
-\alias{print.opencv-image}
 \alias{ocv_resize}
 \alias{ocv_face}
 \alias{ocv_mog2}
@@ -24,8 +23,6 @@ ocv_edges(image)
 
 ocv_camera()
 
-\method{print}{opencv-image}(x, ...)
-
 ocv_resize(image, width = 0, height = 0)
 
 ocv_face(image)
@@ -37,8 +34,16 @@ ocv_knn(image)
 ocv_video(filter)
 }
 \arguments{
-\item{x}{passed to [print]}
+\item{path}{image file such as png or jpeg}
+
+\item{image}{a ocv image object}
+
+\item{width}{output width in pixels}
+
+\item{height}{output height in pixels}
+
+\item{filter}{an R function that takes and returns an opecv image}
 }
 \description{
-Utilities to read and write images with OpenCV.s
+Utilities to read and write images with OpenCV.
 }
diff --git a/src/util.cpp b/src/util.cpp
index b766daf..da26ef0 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -48,7 +48,7 @@ void detectAndDraw( Mat img, CascadeClassifier& cascade,
     }
   }
   t = (double)getTickCount() - t;
-  printf( "detection time = %g ms\n", t*1000/getTickFrequency());
+  //printf( "detection time = %g ms\n", t*1000/getTickFrequency());
   for ( size_t i = 0; i < faces.size(); i++ )
   {
     Rect r = faces[i];