TIFF: bitmap line drawing: use the lowest 1000 dpi.
The first point is that the dpi of gray-scale images is at least 300dpi, such as pathological images, electrophoretic images and so on.
The second point is that the resolution of dot matrix linear graphics is generally above 1000dpi, such as curves or histograms drawn by excel and structural formulas drawn by chemdraw.
Problems encountered in the submission process:
Usually the dpi of digital photos is 72.
The dpi of the picture made by excel is 200.
Unable to meet the submission requirements, so change the dpi settings.
Solution:
Create a new A4 format picture in photoshop, and select the resolution required by the magazine in the picture size option (for example, 1000ppi, which may involve a concept of ppi and dpi. Actually, you don't need to worry. Simply put, one is equivalent to the output of a computer screen (ppi) and the other is equivalent to the output of a printer (dpi). Just set the ppi to 1000 and print the resolution. Paste excel or photos directly into the newly created layer (note that the displayed picture may be small), enlarge the picture to a size suitable for viewing, and cut the required area. If the magazine requires the picture size, you can set the picture size option (for example, 5cm*3cm), save it in tiff format, remove the check mark before saving the layer, and confirm, then use LZW to compress and confirm. The picture saved in this way is about 200k K k.
Improve the advantages of dpi:
Usually, we paste the pictures made by excel into word or save them directly as pictures, and we will find that the pictures will shrink in the early Qing Dynasty and will be blurred after enlargement.
After increasing the dpi, although reducing the image feels not as good as saving it directly in the early Qing Dynasty, the image is still very clear after you enlarge it many times.
The above are some experiences in the process of modifying dpi with the help of Comrade Lao Lang _ Ku, and I will sort them out and share them with you.
(transferred from dxy, provided by gaalaa moderator)
If the original image is a graph composed of "origin",
According to the requirements of "1200 dpi (dots per inch)", black and white line art (simple bar charts, charts, etc. ) ",the modification process is as follows:
(1) Open the drawing with the program "Origin" (such as Origin Pro 7.5);
(2) Click the file ""to export the page ... and select the tag image file (*. Tif) in the save type. At the same time, check the box before displaying the image option to confirm the saving.
(3) In the TIFF options window, "DIP" is set to1200; "Color depth" selects monochrome; Select LZW to "compress", and finally click "OK".
(4) Open the obtained TIF format picture with Photoshop, and confirm that the resolution is 1200 pixels/inch and the width is about 6000 pixels in the menu image and image size; Click "OK".
(5) Select "TIFF" and "Save" as "File" and "Format"; Select "LZW" in "Image Compression"; Click "OK"; You can get pictures that meet the requirements of magazines!
If the picture is a JPG photo, such as an electron microscope photo,
300 dpi for halftone (black and white photos)
600 dpi is used to combine halftones (photos that also contain artistic lines such as labels or thin lines).
According to any of the above requirements, the treatment is as follows:
(1) Open the picture in Photoshop, and select Gray (for black-and-white pictures) or CMYK (for color pictures) from Image Mode in the Image menu.
(2) Set the resolution to 600 (or 300) pixels/inch and the width to about 3000 pixels in the image size; Click "OK".
(3) Select the file, save as and format as TIFF and save it; Select "LZW" in "Image Compression"; Click "OK"; You can get pictures that meet the requirements of magazines!