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Image Error

Sep 11, 2014, 17:31
Post: #1
Image Error
hi all, please help me

I need your help, I have a problem with images:
I have converted a image RGB or Grayscale to Indexed..., with option black and white,

[Image: 9bi3ok.png]

after I save the image with bmp extension

The image is for use web, but when I open the image in Firefox browser, the problem is...

[Image: 23moktf.png]

In other browsers problem not exists

[Image: sg7azm.png]

I hope find the solution Sad
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Sep 12, 2014, 15:38 (This post was last modified: Sep 12, 2014 15:41 by iForStyle007.)
Post: #2
RE: Image Error
Hi Vash Stampida and welcome to the forums ^.^ !

.BMP is a bandwith hog especially for large images.

=== *I suggest you try to export/save to .PNG or .JPEG(faster yet) format. ===

The reason for the difference in color in the browser(FF) maybe by chance or a color setting in firefox, or it could be saving an indexed image to .BMP

Bitmap is also an older format.

If there is a special reason you need the image in indexed color, you COULD save/export it to .GIF *AFTER* previewing it in Gimp
To do this:

Image > Mode > Indexed... , pick settings, click ok
(if it looks good, proceed to export to .GIF) .Gif supports indexed colors

However, looking at the properties of the above posted pictures, they are both .PNG and only around 23 KB in size Smile

"In order to succeed, your desire for success should be greater than fear of failure." BC
[Image: 29uocaf.png]
iFS007 tut vids on YT ~ auto color B&W landscape tut
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Sep 12, 2014, 17:19 (This post was last modified: Sep 12, 2014 17:22 by rich2005.)
Post: #3
RE: Image Error
I can not totally reproduce that problem in PClinuxOS and a Firefox v24

A 2 colour indexed bmp shows with black lines on a dark gray background, so something is not correct with the way FF renders a bmp.

I go with iForStyle007,
Image -> Mode -> Indexed -> Use black and white 1 bit palette
Then Layer -> Transparency -> Remove Alpha Channel (if there is one)
Export as a .gif file.

and it is about a third the size of the bmp.

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Sep 14, 2014, 08:20
Post: #4
RE: Image Error
(Sep 13, 2014 23:43)ofnuts Wrote:  Hmm. The PNG format is better than GIF for all uses except animations.

You are, as ever, correct.
For 1 bit images the file sizes here for, bmp, gif, png, run 80k 30k 6.6k

As earlier, in FF (v24) I get a dark gray background here with the bmp image so I thought I would try Imagemagick
A bright green/red this time. In Opera (v12) browser both are bright green., so not only FF.

http://i.imgur.com/8duxyPq.jpg

Completely different subject, what is the 'barcode' Barcode readers do not recognise.
or is a grayscale medal ribbon from your flying exploits.

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Sep 15, 2014, 17:19
Post: #5
RE: Image Error
Thank all

I know that the format png image and gif are better in web, but the format bmp image is the that I need Sad I think can't with Gimp Sad I have fixed with Gimp, but I couldn't...

I have fixed this error with Imagemagick
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