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OpenCV IplImage
good day all,
i am using openCV to load a color bmp file, i use:
Code:
IplImage* image = cvLoadImage("Color.bmp",1);
the data is stored as a char*
i wish to convert this data into a RGB float array.
however if i simply go through the string and convert each char using a (float) cast, i sometimes end up with negative numbers.
is there a proper way of converting chars that represent color values into proper floats without getting negs ??
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You need to cast your char to unsigned char first, as the RGB values can range from 0~255, which is the range of unsigned chars. Signed chars' range is -128~127. When a RGB value is greater than or equal to 128 and you convert it directly, you get a negative.
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fantastic it works :) thanks, i was beginning to run out of hair to pull out :)