| 摘要 |
An image forming apparatus includes an image carrying device for forming and carrying a toner image thereupon. An image reading device optically reads an image to obtain image data of the image for output. An image processing device converts the image data, which is output by the image reading device, into printing image data. An image writing device writes a latent image on the image carrier according to the printing data. A developing device develops the latent image on the image carrier with toner to form a toner image. An image outputting device transfers the toner image, which is developed by the developing device on the image carrying device, to a transfer member and outputs the transfer member carrying the toner image. An internal pattern generating device generates a predetermined image pattern. A toner-amount measuring device measures the amount of toner adhered to a toner image of the predetermined image pattern that is formed on the image carrying device. A control device corrects a table to convert an output of the toner-amount measuring device into an amount of toner according to image density data of the toner image of the predetermined image pattern that is output by the image outputting device, the image density data being converted from image data obtained by reading, with the image reading device, the toner image of the internally generated predetermined image pattern that is output by the image outputting device.
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