The image may be inserted uncompressed, e.g. if a Pixmap is used or if the image has an alpha channel. Therefore, consider using deflate = True when saving the file. 4. The image content is stored rectangle’s area. The default will render the full page. alpha (bool) – A bool indicating whether an alpha channel should be included in the pixmap. Choose False if you do not really need transparency. This will only. source (Pixmap) – the source pixmap. alpha (bool) – whether to also copy the source’s alpha channel. If the source has no alpha, this parameter has no effect. If False the result will have no alpha

mirroring, shifting, shearing, etc. For example: to create an RGBA image (i.e. containing an alpha channel), specify pix = page.get_pixmap(alpha=True). A Pixmap contains a number of methods and attributes a pixmap of the basic image. Step (2) does the same with the image mask. Step (3) adds an alpha channel and fills it with transparency information. The scripts extract-from-pages.py, and extract-from-xref conversion: import tkinter as tk pix = fitz.Pixmap("input.png") # may have an alpha channel if pix.alpha: # we have an alpha channel! pix = fitz.Pixmap(pix, 0) # remove it tkimg = tk.PhotoImage(data=pix.tobytes("ppm"))

• colorspace=(gray|rgb|cmyk) Render using specified colorspace. • alpha Render pages with alpha channel and transparent background. • graphics=(aaN|cop|app) Set the rasterizer to use for graphics. – the file is encrypted. -r Convert images to RGB when extracting them. -a Embed SMasks as alpha channel. -N Do not use ICC color conversions. 44 Chapter 5. MuPDF on the command line MuPDF Documentation raster image. Each pixel is packed with process colorants, spot colors, and alpha channel in that order. If an alpha channel is present, the process colorants are pre-multiplied with the alpha value. typedef

• colorspace=(gray|rgb|cmyk) Render using specified colorspace. • alpha Render pages with alpha channel and transparent background. • graphics=(aaN|cop|app) Set the rasterizer to use for graphics. – the file is encrypted. -r Convert images to RGB when extracting them. -a Embed SMasks as alpha channel. -N Do not use ICC color conversions. input.pdf Input file name. Must be a PDF file. [object getNumberOfComponents() Number of colors; plus one if an alpha channel is present. Returns Int Number of color components. getAlpha() True if alpha channel is present. Returns Boolean. getStride() Number

• colorspace=(gray|rgb|cmyk) Render using specified colorspace. • alpha Render pages with alpha channel and transparent background. • graphics=(aaN|cop|app) Set the rasterizer to use for graphics. – the file is encrypted. -r Convert images to RGB when extracting them. -a Embed SMasks as alpha channel. -N Do not use ICC color conversions. 40 Chapter 4. MuPDF on the command line MuPDF Documentation raster image. Each pixel is packed with process colorants, spot colors, and alpha channel in that order. If an alpha channel is present, the process colorants are pre-multiplied with the alpha value. typedef

• colorspace=(gray|rgb|cmyk) Render using specified colorspace. • alpha Render pages with alpha channel and transparent background. • graphics=(aaN|cop|app) Set the rasterizer to use for graphics. – the file is encrypted. -r Convert images to RGB when extracting them. -a Embed SMasks as alpha channel. -N Do not use ICC color conversions. 40 Chapter 4. MuPDF on the command line MuPDF Documentation raster image. Each pixel is packed with process colorants, spot colors, and alpha channel in that order. If an alpha channel is present, the process colorants are pre-multiplied with the alpha value. typedef