Errata

Practical Computer Vision with SimpleCV

Errata for Practical Computer Vision with SimpleCV

Submit your own errata for this product.

The errata list is a list of errors and their corrections that were found after the product was released. If the error was corrected in a later version or reprint the date of the correction will be displayed in the column titled "Date Corrected".

The following errata were submitted by our customers and approved as valid errors by the author or editor.

Color key: Serious technical mistake Minor technical mistake Language or formatting error Typo Question Note Update

Version Location Description Submitted By Date submitted Date corrected
Printed
Page 169
Code sample near bottom of page

img.findCorners.(maxnum=9, mindistance=10).show() should read
img.findCorners(maxnum=9, mindistance=10).show()

 John Navratil  May 27, 2013 
Printed
Page 168
Code sample at bottom of page

img.findCorners.(maxnum=9).show() should read
img.findCorners(maxnum=9).show()

 John Navratil  May 27, 2013 
Printed
Page 168
code between second and third paragraph

img.findCorners.show() emits error "'function' object has no attribute 'show'".

Should be img.findCorners().show()

 John Navratil  May 27, 2013 
Printed, PDF, ePub, Mobi,
Page 40
Link on the page.

https://github.com/ingenuitas/SimpleCV/wiki/List-of-IP-Camera-Stream-URLs should be updated to https://github.com/sightmachine/SimpleCV/wiki/List-of-IP-Camera-Stream-URLs.

 CodeTab  Apr 25, 2013 
Printed, PDF, ePub, Mobi,
Page 10
Link on bottom of the page

https://github.com/ingenuitas/SimpleCV/blob/master/README.markdown should be updated to https://github.com/sightmachine/SimpleCV/blob/master/README.markdown.

 CodeTab  Apr 25, 2013 
Printed, PDF, ePub, Mobi,
Page 9
First link on the page

http://www.simplecv.org/docs/installation.html should be replaced with http://www.simplecv.org/download.

 CodeTab  Apr 25, 2013 
PDF
Page 57
image at bottom of page

Black & White Image display is negative of what is shown in book.

 Bill Bishop  Apr 05, 2013 
PDF
Page 18
last line

"camera-example.png" should be "camera_example.png"
Example images downloaded from simpleCV.org site (as directed earlier on the page)

 Bill Bishop  Apr 05, 2013 
Printed
Page 151
Annotation #3

In the third annotation of the Finding Blobs example in Chapter 8 it says you can change the preceding block of code to color the blobs red by adding "packs.show()". It should be "blobs.show()"

 Nathan Oostendorp
 		 Feb 13, 2013 
PDF
Page 85
Figure 5-2

The visible light spectrum is displayed inversed. Red should be at 700 and blue at 400.

 Anonymous  Nov 11, 2012 
PDF
Page 68, 118, 147
Source code, display initialization with parameters (correction)

You are initializing the display object as:

disp = Display((cam.getProperty('width'), cam.getProperty('height')))

I'm testing it with SimpleCV version 1.3.0, it raise an error:

TypeError: integer argument expected, got float

You need to parse the camera properties as Integer :

disp = Display((int(cam.getProperty('width')), int(cam.getProperty('height'))))

At pages: 68, 118, 147

 Ignacio Ocampo  Aug 15, 2012