Transparency and (Rotate and Save) Issues

[senthil]

Hi loic,

I am using 3.7.7 GDPicture Pro. Now i am having issues in image transparency, after rotate and save.

1. To set the image transparency, i am using following code.
lRGBWhiteColor = ogdpicImg.ColorGetARGBValueFromARGB(255, 255, 255, 255)
ogdstatus = ogdpicImg.SetTransparencyColorEffect(lRGBWhiteColor)
I am using jpeg file for this process.

2. Image Scattering Issue.
i) Scanned the image using "oGdPicture.TwainSetCurrentPixelType (TWPT_GRAY)".
ii) Save the image.
iii) Rotate the image.
iV) Again save the image
V) After this, some of the gray backgrounds of image get scattered.

Reply Soon.

Thanks and Regards,
Senthil

[Loïc]

Hi,

Could you write me the code you are using to do that ?

I need to know what is the rotation you are using.

Regards,

Loïc

[senthil]

Hi Loic,

When i am scanning, i am setting gray background using oGdPicture.TwainSetCurrentPixelType (TWPT_GRAY) . After scanning , if i rotate and save the image, the gray background of image get fadded. But if i convert image to 24Bpp before rotate, background was not fadded. If i convert in to 24Bpp image size is increasing.

Reply soon. It is very urgent.


Code:

If oGdPicture.TwainOpenDefaultSource() Then
nImageCount = 0

oGdPicture.TwainSetHideUI (chkHideUI.Value)
oGdPicture.TwainSetIndicators (chkIndicator.Value)
If chkAutoBrightness.Value = 1 Then
oGdPicture.TwainSetAutoBrightness (True)
Else
oGdPicture.TwainSetAutoBrightness (False)
oGdPicture.TwainSetCurrentBrightness (HBrightness.Value)
End If

oGdPicture.TwainSetCurrentContrast (HContrast.Value)
oGdPicture.TwainEnableDuplex (chkDuplex.Value = 1)
oGdPicture.TwainSetAutoFeed (True) 'Set AutoFeed Enabled
oGdPicture.TwainSetAutoScan (True) 'To achieve the maximum scanning rate

oGdPicture.TwainSetCurrentResolution (200)
oGdPicture.TwainSetCurrentPixelType (TWPT_GRAY) 'Gray
oGdPicture.TwainSetCurrentBitDepth (1) ' 1 bpp

While oGdPicture.CreateImageFromTwain(Me.hWnd) <> 0
nImageID = oGdPicture.GetNativeImage
nImageCount = nImageCount + 1
Call ApplyImageFilters(nImageID)
'If chkPreview.Value = 1 Then Call DisplayNativeImage
If nImageCount = 1 Then
Call oGdPicture.TiffSaveAsNativeMultiPage(App.Path & "\multipage.tif", 4)
Else
oGdPicture.TiffAddToNativeMultipage (nImageID)
oGdPicture.CloseImage (nImageID)
End If
Wend

'Rotate 90 degree
oGdPicture.RotateAngle (90)

Call oGdPicture.SaveAsTiff(App.Path & "\multipage1.tif")

If chkPreview.Value = 1 Then Call DisplayNativeImage

oGdPicture.TiffCloseNativeMultiPage
oGdPicture.TwainCloseSource
MsgBox "Done !"
Else
MsgBox "can't open default source, twain state is: " & Trim(Str (oGdPicture.TwainGetState))
End If


Thanks and Regards,
Senthil

[Loïc]

Hi,

You should replace this line

Code: Select all

oGdPicture.RotateAngle (90)

by this one

Code: Select all

Rotate(Rotate90FlipNone)

Or :
like you said, convert first the image to 24bpp, apply the rotation and convert it to 8bpp.


Regards,

Loïc

[senthil]

Hi Loic,

In Xp system, without converting to 24Bpp, if i rotate and save the image, rotated image not get saved. So i am following the below procedure for rotate and save.

1. Getting the pixel of the image before rotation using oGdPicture.GetIntPixelFormat. ( In my sample it is 8Bpp)

2. Then convert the image to 24Bpp.

3. Rotate the image.

4. After rotation, convert the image to original pixel ( In my sample it is 8Bpp).

5. Save the image.

If i follow the above procedure. In XP System without fadding image, image get saved.

But same code, if i followed in win 2000 system,the gray background of image get fadded.

If i followed your suggestion (Rotate(Rotate90FlipNone)) also, same problem in win 2000.
Reply soon.

Thanks and Regards,
Senthil

[Loïc]

Senthil,

I don"t understand what's you mean by "the gray background of image get fadded"

Please, send me by mail a "good" image and the same as "faded" image,
Or give me a full code to reproduce this behaviour because the code you gave me is incomplete...

Regards,

Loïc

[senthil]

Hi Loic,

As you said, i sent the tiff images to support
Reply soon.

Thanks and Regards,
Senthil

[Loïc]

Ok Senthil,

your problem will be solve into the next release (end of week).


Best regards,

Loïc

[Loïc]

You can download the last release now:
http://www.gdpicture.com/products/gdpic ... ctivex.php


Regards,

Loïc

[senthil]

Hi Loic,

Thanks for your reply.
Now i am using your latest version 3.8.
In this version, if i do the same operation, i am getting collapsed image as output. This problem is only in windows 2000, not in Windows XP. I am doing following steps.

1. Getting the pixel of the image before rotation using oGdPicture.GetIntPixelFormat. ( In my sample it is 8Bpp)

2. Then convert the image to 24Bpp.

3. Rotate the image.

4. After rotation, convert the image to original pixel ( In my sample it is 8Bpp).

5. Save the image.

But if i convert image pixel using 'oGdPicture.ConvertTo8BppQ', image is not getting collapsed.
But if i do the above steps in windows XP, image size is increasing more.

I will send the images to your email id (esupport@gdpicture.com) for your reference.

Reply soon.

Thanks and Regards,
Senthil

[Loïc]

Hi Senthil,

You foud a new strange bug.

Into the last 3.8.1 edition it is solve.

Best regards,

Loïc Carrère