Saddle Sewing Machine? Need Help Please

[LatigoAmigo]

3 hours ago, Northmount said:

Would be nice it the site resized automatically!

Would be, but sometimes you really want the detail to show up, so without doing a close-up, that calls for a higher resolution image. Maybe if it acted like an IPhone and offered various sizes... now that would make life easier for many of our fellow leather workers, and possibly allow us to see more of their work.

[LatigoAmigo]

3 hours ago, Northmount said:

800 x 600 pixels yields a file around 4 kB. 

JPEGs are funny animals. I created a black 800 x 600 pixel image in Photoshop that had a file size of 17.2 kB, a white image the same size that was 11.7 kB, and then resized a high resolution image down to 800 x 600 and it was 641 kB. Go figure...

[Northmount]

46 minutes ago, LatigoAmigo said:

JPEGs are funny animals. I created a black 800 x 600 pixel image in Photoshop that had a file size of 17.2 kB, a white image the same size that was 11.7 kB, and then resized a high resolution image down to 800 x 600 and it was 641 kB. Go figure...

Content in the photo really has a big impact on file size (range of colour and intensity).  In Photoshop, when saving a JPEG, I have a choice of "quality" from 0 (smallest file size) to 12 (largest file size). 

So I picked a random photo that was saved as a TIFF.  1447 x 1551 pixels (20" x 21.5") saved with a resolution of 72 pixels / inch with a 3 MB File size.  Saved it as a JPEG without reducing the size.  Set at 0, file size was 142 kB.  Set at 12, file size was 1.4 MB (10 times larger).  Resized the original to 746 x 800 pixels maintaining the same proportions, and did test over.  0 yielded a file size of 81.6 kB, 12 yielded a file size of 514 kB.  So quite a range of file sizes.

My numbers quoted in a previous post above were out by at least 10 times; should never quote numbers without testing and confirming!

Resizing makes a substantial difference, and the quality setting makes a lot of difference too.  I think the quality setting gets missed in a lot of resizing applications, or missed by the user in other cases.  Would be nice if we could keep things simple, just one setting instead of too many choices for the average user.

Tom

[LatigoAmigo]

1 hour ago, Northmount said:

Resizing makes a substantial difference, and the quality setting makes a lot of difference too.

My hobby is printing, so then we get into the topic of color mode, which also has a impact on the file size. Changing from RGB, which is what cameras use, to CMYK, which is what printers use, has caused that 641 kB file to mushroom to 1.68 MB. 

[Northmount]

1 hour ago, LatigoAmigo said:

My hobby is printing, so then we get into the topic of color mode, which also has a impact on the file size. Changing from RGB, which is what cameras use, to CMYK, which is what printers use, has caused that 641 kB file to mushroom to 1.68 MB. 

Definitely!

Tom