A matrix of class double when converted to an image it is becoming white.Please help me with the code.

Image

[Jan]

The question is not clear. Do you explain a problem, or doyou want to get a white TIFF file? If it is a problem, we can suggest an improvement only, if we see the code. Maybe the matrix contains 1s only?

Please edit the question and insert any details.

[sb icse]

j=1143 1142 1134 1132 1119 1101 1104 1099 1085

this are the pixel values present in the matrix j.Now I want it to be converted to an image but when I do so with imwrite function all the values are changing to 255.

[Geoff Hayes]

Perhaps writing as a tif file (with your version of MATLAB) does not support 16-bit integers (and so that would explain why the pixels are being assigned the maximum value for an 8-bit unsigned integer).

[sb icse]

I am using R2018b version which is perhaps the latest.It is not essential to convert the matrix to tif it may be converted to a jpg file.

[Geoff Hayes]

From imwrite, If A is of data type uint16 and the output file format supports 16-bit data (JPEG, PNG, and TIFF), then imwrite outputs 16-bit values. If the output file format does not support 16-bit data, then imwrite returns an error. Please confirm that your input data is of type uint16 (cast to uint16 if you need to) and then try one of these three formats.