PNG and GIFF
To make images transparent in IrfanView, first, open your image and ensure it's in a format that supports transparency, like PNG. Then, go to "Image" in the menu, select "Palette" and choose "Change color to transparent." Click on the color in your image that you want to make transparent, and adjust the "Transparency" level as needed. Finally, save the image in a format that supports transparency to retain the effect.
The PNG (Portable Network Graphics) format supports multiple levels of transparency, allowing for varying degrees of opacity in images. Unlike formats like JPEG, which only support a single level of transparency (none), PNG can handle alpha channel transparency, enabling smooth transitions and soft edges. This makes PNG ideal for images that require complex transparency effects, such as logos and graphics with varying backgrounds.
GIF is such a format that supports animation and transparency. See the related question for more details on the GIF format and some other formats that support one of these features.
i think it not supports any image format...
The main difference between TIF and PNG file formats is that TIF is a lossless format, meaning it retains all image data, while PNG is a lossless format that compresses image data. TIF is better for preserving image quality as it does not compress the image data, making it ideal for high-quality prints or editing. PNG is better for web use or images with transparency, as it supports transparency and smaller file sizes.
The TIFF is a flexible format that can represent everything from fax images to photos compressed or uncompressed as a bitmap, including additional image information like EXIF. TIFF supports up to 16bit per channel, transparency, multiple images, 2D images in multiple planes. It is widely used by scanners and fax machines due to its support for all possible color depths and multiple images (for example the pages that are scanned/faxed). It gets also used in digital cameras as a lossless format.
PNG is an image file format, such as JPEG or BMP. One of the differences between PNG and JPEG, is that PNG supports transparency.
When saving an image as a TIFF file, it retains high quality and supports layers, making it suitable for professional printing and editing. PNG files are smaller in size, support transparency, and are commonly used for web graphics and digital images.
When you download a GIF, it typically saves in an image format because GIF (Graphics Interchange Format) is a type of image file that supports both static and animated images. Most devices and applications recognize the GIF format and save it as an image file. This allows you to view the GIF in image viewers or share it like any other image format. If you want to use it as an animated graphic, ensure that the application you use supports GIF animations.
PNG (Portable Network Graphics) is a raster graphics file format that supports lossless data compression, allowing for high-quality images without losing detail. It was developed as an alternative to the GIF format, offering features such as transparency and a wider color palette. PNG is commonly used for web graphics, logos, and images requiring clear backgrounds. Its ability to maintain image quality makes it a popular choice among designers and developers.
Depends on the image format:
A recent file format that supports continuous tones and transparency is the PNG (Portable Network Graphics) format. Developed in the mid-1990s, PNG uses lossless compression and allows for variable transparency levels through an alpha channel, making it ideal for web graphics and images requiring high quality without artifacts. It has largely replaced GIF for many applications due to its broader color support and ability to handle transparency effectively.