George M. Perzel
06-17-2009, 8:01 AM
Hi Gang;
I thought I would do a granite tile photo for a friend whose daughter is graduating- great photo, good resolution, should be a snap. Six hours later (yesterday) I finally quit banging my head against the keyboard and opted for an India Pale Ale, which greatly helps to quell my frustration.
See pics below.
In Photoshop, I took the original (Pic 1)(480 dpi-1.1M), changed it to grayscale, slightly changed the brightness/contrast , resized it to 300 dpi and 12x12 ", softened the lower edge to get rid of the hard line-maybe 5 minutes total. Saved it as a bitmap and opened it in Photograv with the granite prm and saved the engraved results (pic2) and imported them into Corel X4.
Being the cautious type, who has been burned many times before by what looks good may not be good, I opted to trial a section of the photo on a piece of black plexi scrap-results are Pic 3. Not good- horrible wide slanted lines across the face. Inspected the engraving bitmap at high magnification and can see no lines.
1. Thought it might be the material -nope, same results on wood
2. Tried a different granite prm in Photograv-no appreciable change
3. Tried inverting photo and used cherry prm-no appreciable change
4. Kept original size-300 dpi-no change
5. Had my first IPA to help me think clearer
6. Kept original size and original dpi (480) -no change
7. Tried another photo- no problem-no lines
8. Had 2nd IPA- gaining courage, we can solve this
9. Took original photo, only changed to grayscale and 300 dpi, then Photgrav with granite prm- no change
10. Being an engineer (retired) who is highly trained to solve problems quickly and efficiently, I gathered all the trial images and results and, with my third IPA, carefully analyzed the info and found nothing obvious- other than the lines seem to vary in angle and width from the first trial-Pic3 and later ones (Pic 4).
11. Said the heck with it and quit to watch reruns of Gilligan's Island (with another IPA).
I would certainly appreciate any advice, suggestions, ideas, thoughts, etc regarding this-really got me stymied.
Thanks, gang
Best regards;
George
LaserArts
I thought I would do a granite tile photo for a friend whose daughter is graduating- great photo, good resolution, should be a snap. Six hours later (yesterday) I finally quit banging my head against the keyboard and opted for an India Pale Ale, which greatly helps to quell my frustration.
See pics below.
In Photoshop, I took the original (Pic 1)(480 dpi-1.1M), changed it to grayscale, slightly changed the brightness/contrast , resized it to 300 dpi and 12x12 ", softened the lower edge to get rid of the hard line-maybe 5 minutes total. Saved it as a bitmap and opened it in Photograv with the granite prm and saved the engraved results (pic2) and imported them into Corel X4.
Being the cautious type, who has been burned many times before by what looks good may not be good, I opted to trial a section of the photo on a piece of black plexi scrap-results are Pic 3. Not good- horrible wide slanted lines across the face. Inspected the engraving bitmap at high magnification and can see no lines.
1. Thought it might be the material -nope, same results on wood
2. Tried a different granite prm in Photograv-no appreciable change
3. Tried inverting photo and used cherry prm-no appreciable change
4. Kept original size-300 dpi-no change
5. Had my first IPA to help me think clearer
6. Kept original size and original dpi (480) -no change
7. Tried another photo- no problem-no lines
8. Had 2nd IPA- gaining courage, we can solve this
9. Took original photo, only changed to grayscale and 300 dpi, then Photgrav with granite prm- no change
10. Being an engineer (retired) who is highly trained to solve problems quickly and efficiently, I gathered all the trial images and results and, with my third IPA, carefully analyzed the info and found nothing obvious- other than the lines seem to vary in angle and width from the first trial-Pic3 and later ones (Pic 4).
11. Said the heck with it and quit to watch reruns of Gilligan's Island (with another IPA).
I would certainly appreciate any advice, suggestions, ideas, thoughts, etc regarding this-really got me stymied.
Thanks, gang
Best regards;
George
LaserArts