I have created an NSImage object, and ideally would like to determine how many of each pixels colour it contains. Is this possible?
Share
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I have created an NSImage object, and ideally would like to determine how many of each pixels colour it contains. Is this possible?
I suggest creating your own bitmap context, wrapping it in a graphics context and setting that as the current context, telling the image to draw itself, and then accessing the pixel data behind the bitmap context directly.
This will be more code, but will save you both a trip through a TIFF representation and the creation of thousands or millions of NSColor objects. If you’re working with images of any appreciable size, these expenses will add up quickly.