drawing an array of pixels to the screen
drawing an array of pixels to the screen
- Subject: drawing an array of pixels to the screen
- From: Jason Horn <email@hidden>
- Date: Fri, 9 Nov 2007 22:27:19 -0500
I am working on a computer vision based app that detects objects in
video images. I have to implement custom algorithms to locate and
track objects, so I need to write code that has direct access to the
pixel values and keep track of the x,y coordinates of certain
objects. This is easiest to do with the image represented as a 2D
array of int values. However, it seems that the only way to draw
bitmaps to the screen is with NSImage and NSBitmapImageRep or
CIImage. Is there another way? It seems like a waste (and a
performance hit) to convert a 2D array of pixel values into a byte
stream every time you want to display the image. Is there a way to
draw the pixel values directly to the screen (and do it quickly).
Thanks for any ideas.
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