How can i imwrite ppm image file as a ASCII Encoding format

After reading the PPM file and processing the data, and save it again using imwrite.

But I cant imwrite ppm image file as a ASCII Encoding format

So I cant properly using that ppm file.

For example,

a = imread("xxxx.ppm")

Iinfo1 = imfinfo('xxxx.ppm')

That file's FormatVersion : 'P3', Formatsignature : 'P3' and Encoding:'ASCII'

but after processing 'a' data, and store parameter 'b'

imwrite(b,'yyyy.ppm')

and Iinfo2 = imfinfo('yyyy.ppm')

That file's FormatVerison : 'P6', Formatsignature : 'P6' and Encoding:'rawbits'

I want imwrite .ppm file as a ASCII Encoding format

please help me.

I can't find any solution on the Internet

I'm sorry for the lack of readability because My English skill are not good

Thanks for reading.

Answer 1

[Angelo Yeo]

a = imread("sample.ppm");
imwrite(a, "save_sample.ppm","ppm", "Encoding","ASCII")
imginfo = imfinfo("save_sample.ppm")

imginfo =

struct with fields:

Filename: 'C:\Workspace\q2102176\save_sample.ppm'

FileModDate: '03-Apr-2024 15:37:25'

FileSize: 2800776

Format: 'PPM'

FormatVersion: 'P3'

Width: 640

Height: 426

BitDepth: 24

ColorType: 'truecolor'

FormatSignature: 'P3'

Encoding: 'ASCII'

MaxValue: 255

ImageDataOffset: 15

[경현]

Thank you very much for your help.

have a good day.