Text color based on background image

Question

My view has a background image with a text label overlay What\'s the best/good dynamic way to determine text color based on the background image so it can be readable (For n

Answer 1

Find the average color with the link woz mentioned

Then style your text

CGFloat red = 0.0, green = 0.0, blue = 0.0, alpha = 0.0;
[averageColor getRed:&red green:&green blue:&blue alpha:&alpha];

int threshold = 105;
int bgDelta = ((red * 0.299) + (green * 0.587) + (blue * 0.114));

UIColor *textColor = (255 - bgDelta < threshold) ? [UIColor blackColor] : [UIColor whiteColor];

something like this.

You could also use the link above to get the UIColor from the image and use matt's category for UIColor to get light or dark.