How to convert image from Format1bppIndexed to Format24bppRgb?
- From: blackcarrera@xxxxxxxxxxx (JY)
- Date: 22 Apr 2005 12:52:45 -0700
All of my images that are 24bppRgb are also about 41MB in size,
10000x10000 pixels are fine when I make calls to FromImage, DrawImage,
etc. It's only when I try to convert the 1bpp to 24bppRbg that I run
into the problem when I make calls to DrawImage (in the process of
trying to convert pixel formats)...
I also have 1GB RAM so I don't really think that I'm literally "Out of
memory" (how did you calculate that I would need 128MB?)
Any other ideas? My code looks ok?
Thanks again for your help!!
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That suggests to me that it's a bit large then.. If the image was
square
it'd be 6556 pixels on a side. To make a 24 bit per pixel image you'd
require 128 megabytes of memory.
There is a possibility that the resulting image is indeed too large
for the
machine.
--
Bob Powell [MVP]
Visual C#, System.Drawing
Find great Windows Forms articles in Windows Forms Tips and Tricks
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"JY" <blackcarrera@xxxxxxxxxxx> wrote in message
news:bc38f5ee.0504220621.6e05e418@xxxxxxxxxxxxxxxxxxxxx
> Thanks for your response Bob... The 1bpp mage is about 41MB
>
> "Bob Powell [MVP]" <bob@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
> news:<uKzQARsRFHA.3560@xxxxxxxxxxxxxxxxxxxx>...
>> How big is the 1bpp image?
>>
>> --
>> Bob Powell [MVP]
>> Visual C#, System.Drawing
>>
>> Find great Windows Forms articles in Windows Forms Tips and Tricks
>> http://www.bobpowell.net/tipstricks.htm
>>
>> Answer those GDI+ questions with the GDI+ FAQ
>> http://www.bobpowell.net/faqmain.htm
>>
>> All new articles provide code in C# and VB.NET.
>> Subscribe to the RSS feeds provided and never miss a new article.
>>
>>
>>
>>
>>
>> "JY" <blackcarrera@xxxxxxxxxxx> wrote in message
>> news:bc38f5ee.0504211045.101b6cc5@xxxxxxxxxxxxxxxxxxxxx
>> > Hi,
>> > I'm trying to convert an image with PixelFormat Format1bppIndexed
to
>> > Format24bppRgb. I keep getting the "Out of memory" message.
>> >
>> > Here's what I've tried:(
>> >
>> > (where bm.PixelFormat is Format1bppIndexed)
>> > 1)
>> > bm2 = New Bitmap(bm.Width, bm.Height, PixelFormat.Format24bppRgb)
>> > g2 As Graphics = Graphics.FromImage(bm2)
>> > g2.DrawImage(bm, subRect, 0, 0, bm.Width, bm.Height,
>> > GraphicsUnit.Pixel)
>> >
>> > -> get "Out of memory"
>> >
>> > 2)
>> > bm2 = bm.Clone(New Rectangle(0, 0, bm.Width, bm.Height),
>> > PixelFormat.Format24bppRgb)
>> >
>> > -> the new bitmap bm2 is Format1bppIndexed, not Format24bppRgb
>> >
>> > Any ideas? I don't necessarily need the image to be
Format24bppRgb - I
>> > just need to be able to use the function "Graphics.FromImage" (so
it
>> > could be Format16bppRgb555, etc). Any help will be greatly
>> > appreciated!!
.
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