[Scilab-users] saving an image as b/w image

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der_Phil der_Phil
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[Scilab-users] saving an image as b/w image

Dear Experts,

I try to save a black/white image as a binary image.

That means: An image with bit depth of 1.

"imwrite" from IPCV however seems to save the image at least as a 8-bit-image.

The array I want to save as an image consists of "0" and "1" only.

The output file type must be ".jpg".

Thank you,
Philipp





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mottelet mottelet
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Re: saving an image as b/w image

Hi,

True BW Jpeg is not possible. Use TIFF format instead.

S.

Le 10/07/2020 à 15:52, P M a écrit :
Dear Experts,

I try to save a black/white image as a binary image.

That means: An image with bit depth of 1.

"imwrite" from IPCV however seems to save the image at least as a 8-bit-image.

The array I want to save as an image consists of "0" and "1" only.

The output file type must be ".jpg".

Thank you,
Philipp





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-- 
Stéphane Mottelet
Ingénieur de recherche
EA 4297 Transformations Intégrées de la Matière Renouvelable
Département Génie des Procédés Industriels
Sorbonne Universités - Université de Technologie de Compiègne
CS 60319, 60203 Compiègne cedex
Tel : +33(0)344234688
http://www.utc.fr/~mottelet

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Tan Chin Luh Tan Chin Luh
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Re: saving an image as b/w image

Hi,

I have not dive into different image formats but base on previous experience, i believe Stephane was right about this. So far when dealing with different bits per pixel, tif could be the way to go. The tif created by imwrite would be able to read by imread without any issue. 

ps: In Scilab, binary image should be in %t, %f, however, some functions might not support binary so you might need to convert to relevant format before operation. 

ps2: If I remember correctly %t %f were detected as int32 in C gateway. so, there might be something still not fully covered during conversion. 

thanks.

rgds,
CL 

---- On Sat, 11 Jul 2020 00:42:14 +0800 Stéphane Mottelet <[hidden email]> wrote ----

Hi,

True BW Jpeg is not possible. Use TIFF format instead.

S.

Le 10/07/2020 à 15:52, P M a écrit :
Dear Experts,

I try to save a black/white image as a binary image.

That means: An image with bit depth of 1.

"imwrite" from IPCV however seems to save the image at least as a 8-bit-image.

The array I want to save as an image consists of "0" and "1" only.

The output file type must be ".jpg".

Thank you,
Philipp





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users mailing list
[hidden email]
https://antispam.utc.fr/proxy/1/c3RlcGhhbmUubW90dGVsZXRAdXRjLmZy/lists.scilab.org/mailman/listinfo/users

-- 
Stéphane Mottelet
Ingénieur de recherche
EA 4297 Transformations Intégrées de la Matière Renouvelable
Département Génie des Procédés Industriels
Sorbonne Universités - Université de Technologie de Compiègne
CS 60319, 60203 Compiègne cedex
Tel : +33(0)344234688
http://www.utc.fr/~mottelet

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