Hi,

I have a photo that I must to change so so the maximum Image File Size will be 62,500 bytes, the 'Image Resolution' must be 320 pixels high by 240 pixels wide, and the Image Color Depth must be 24-bit color.

The Image is in JPG format now, and has 2128 pixels width, 2832 pixels hight, X-Resolution 72,000 pixels/inch and Y-Resolution 72,000 pixels/inch in the Gimp.

The 'Image Resolution' abowe meant that that I must to change in Gimp the Image width to 240 pixels and hight to 320 pixels, right?

The 'Image Resolution' has nothing to do with X-Resolution and Y-Resolution, right?

How can I know whether the Image has Color Depth 24-bit color?

Any advices will be appreciated!

"David Gowers" writes:

Hi David,

Hi Paul,

On Tue, Aug 12, 2008 at 6:02 PM, Csanyi Pal wrote:

I have a photo that I must to change so so the maximum Image File Size will be 62,500 bytes, the 'Image Resolution' must be 320 pixels high by 240 pixels wide, and the Image Color Depth must be 24-bit color.

The Image is in JPG format now, and has 2128 pixels width, 2832 pixels hight, X-Resolution 72,000 pixels/inch and Y-Resolution 72,000 pixels/inch in the Gimp.

How can I know whether the Image has Color Depth 24-bit color?

If the item selected in the Image->Mode menu is 'RGB'

This Image has only one layer, the background layer. In the Image->Mode menu 'RGB' is gray but the 'Grayscale' and 'Index..' aren't gray, so I can select them.

But, in the Channels I can see there Red, Green, Blue and Alfa channel, and in the Title line of the Image window there I can see: ImageName.jpg-5.0 (RGB, 1 layer) 2128x2832.

I think that, that this Image is RGB, right?

"David Gowers" writes:

Hi David,

On Tue, Aug 12, 2008 at 7:23 PM, Csanyi Pal wrote:

"David Gowers" writes:

On Tue, Aug 12, 2008 at 6:02 PM, Csanyi Pal wrote:

I have a photo that I must to change so so the maximum Image File Size
will be 62,500 bytes, the 'Image Resolution' must be 320 pixels high by 240 pixels wide, and the Image Color Depth must be 24-bit color.

The Image is in JPG format now, and has 2128 pixels width, 2832 pixels hight, X-Resolution 72,000 pixels/inch and Y-Resolution 72,000 pixels/inch in the Gimp.

How can I know whether the Image has Color Depth 24-bit color?

If the item selected in the Image->Mode menu is 'RGB'

This Image has only one layer, the background layer. In the Image->Mode menu 'RGB' is gray but the 'Grayscale' and 'Index..' aren't gray, so I can select them.

But, in the Channels I can see there Red, Green, Blue and Alfa channel, and in the Title line of the Image window there I can see: ImageName.jpg-5.0 (RGB, 1 layer) 2128x2832.

I think that, that this Image is RGB, right?

Yes, the title is also a good guide. Actually, I believe the 'proper', logical way to do this is through Image->Properties.
The 'Colorspace' property specifies whether the image is rgb, gray, or indexed.

I haven't that option: Image->Properties

maybe because I'm using Gimp version 2.2.

Why I haven't this option?

"Owen" writes:

"David Gowers" writes:

I haven't that option: Image->Properties

maybe because I'm using Gimp version 2.2.

Why I haven't this option?

In 2.2 look at View->Info

I find it.
It's disturbing to me that that there I can see the 'Screen type: RGB Color' and not something like: 'Image Color type: RGB Color'.

I find the Color Depth and it's 24 bit depth.