satellite images exporting problem

when i processing the satellite images in matlab (calculate Toa reflectance) the pixel value result is correct but when i export the images in tiff format, images coordinate system and georeference are loss and pixel values are change. Help please

[Walter Roberson]

How are you doing the exporting?

[Bijoy Gayen]

imwrite(TOA7,'I:/matlab test','.tif');

[Image Analyst]

What is the class of TOA7? uint8? double?

[Bijoy Gayen]

B7=imread('I:\PATH = 140 ROW = 44\LC81400442016100LGN00_B7.TIF');

TOA7=double((double(B7)*0.00002)-0.1);

imwrite(TOA7,'I:/matlab test','.tif');

[Image Analyst]

If you want to save as double, then use save() to save into a .mat file, or else maybe try the TIFF class. I don't think imwrite likes double images.

[Bijoy Gayen]

when i save the images after calculation TOA7(pixel values range -0.1 to 1.56) the pixel values of TOA7 are change and the coordinate system and georeference are loss.The pixel range change into 0 to 245.

[Aishwarya V]

Hi....How to export satellite images processed in matlab without losing geolocation information?..

[Walter Roberson]

@Aishwarya V

Possibly geotiffwrite() ? https://www.mathworks.com/help/map/ref/geotiffwrite.html