Colors incorrect when saving images with gray-scale.

[ikary]

Hi, I got wrong colors on saving gray-scale images to jpeg file.
Hope someone can tell me how to fix it. Here is my steps:(VB 6.0 code)

Code: Select all

........
twain1.TwainSetCurrentPixelType(1)
twain1.TwainSetCurrentBitDepth(8)
twain1.TwainAcquireToImageID(Me.hWnd)
twain1.SaveAsTiff("test1.tif", 6)
twain1.SaveAsJpeg("test2.jpg", 100)
.......


I got a test1.tif with 256 colors which is what I expected.
But the test2.jpg(looks no different with test1.tif) is a 24-bit true color image, not a 8-bit gray-scale image? Did I miss something?

[Loïc]

Hi,

For the moment the gdpicture components are enabled to save jpeg files as 24 bit per pixel color depth only. If you want to save as indexed colors file you need to use the gif, bmp or tif encoders.

Regards,

Loïc