How to access each pixel in 1BPP image.

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This topic and its replies were posted before the current version of LEADTOOLS was released and may no longer be applicable.

#1 Posted : Thursday, July 19, 2018 4:01:24 AM(UTC)

krekar

Groups: Registered
Posts: 7

Thanks: 2 times

Hi.

I want to access each pixel data in 1bpp image.

File Attachment(s):

bit1_ccitt.tiff (168kb) downloaded 248 time(s).

But LBitmapBase.GetPixelData is only for 8, 16, 24, 32, 48 and 64-bit bitmaps.

Is there way for access 1bpp image?

Thanks.


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#2 Posted : Thursday, July 19, 2018 7:01:34 AM(UTC)

Anthony Northrup

Groups: Registered, Tech Support, Administrators
Posts: 199

Was thanked: 28 time(s) in 28 post(s)

Hello,

The main reason the LBitmapBase::GetPixelData method only works on 8/16/24/32/48/64 BPP images is because they are multiples of 8. This means the actual data stored in a pixel is represented by an integer number of bytes. For images with different BPP, such as your image with 1 BPP, you'll need to use either the GetRow method or the GetRowColumn method. Both of the documentation pages below have an example for usage:

LBitmapBase::GetRow: https://www.leadtools.com/help/leadtools/v20/main/clib/lbitmapbase-getrow.html
LBitmapBase::GetRowCol: https://www.leadtools.com/help/leadtools/v20/main/clib/lbitmapbase-getrowcol.html

Thanks,

Anthony Northrup
Developer Support Engineer
LEAD Technologies, Inc.

1 user thanked Anthony Northrup for this useful post.

krekar on 7/20/2018(UTC)

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