Image processing apparatus capable of efficiently converting image file, control method therefor, and storage medium

A control method for an image processing apparatus, the control method comprising:

• in accordance with an image conversion instruction issued by a user, converting a first-format image file in a first format including image data and annotation information on the image data into a second-format image file in a second format whose memory capacity of a predetermined area where annotation information is recordable is limited to a first size, wherein a memory capacity of a predetermined area in the first-format image file where annotation information is recordable is greater than the first size;
• and
• when recording the first-format image file before the image processing apparatus receives the image conversion instruction, perform operations to:
• (i) generate first annotation information for the first-format image file, (ii) generate second annotation information for the second-format image file, including information obtained by removing a part of data of the first annotation information so that a data amount of the second annotation information is not greater than the first size, and (iii) record the image data, the first annotation information for the first-format image file, and the second annotation information for the second-format image file in the first-format image file,
• wherein in the converting the first first-format image file into the second first-format image file in accordance with the image conversion instruction, the second-format image file is generated from the image data and the second annotation information for the second-format image file both recorded in the first-format image file, and
• wherein the second annotation information is recorded in the predetermined area in the second-format image file.

A non-transitory storage medium storing a computer-executable program for causing a control method for an image processing apparatus, the control method comprising:

• in accordance with an image conversion instruction issued by a user, converting a first-format image file in a first format including image data and annotation information on the image data into a second-format image file in a second format whose memory capacity of a predetermined area where annotation information is recordable is limited to a first size, wherein a memory capacity of a predetermined area in the first-format image file where annotation information is recordable is greater than the first size;
• and
• when recording the first-format image file before the image processing apparatus receives the image conversion instruction, perform operations to:
• (i) generate first annotation information for the first-format image file, (ii) generate second annotation information for the second-format image file, including information obtained by removing a part of data of the first annotation information so that a data amount of the second annotation information is not greater than the first size, and (iii) record the image data, the first annotation information for the first-format image file, and the second annotation information for the second-format image file in the first-format image file,
• wherein in the converting the first first-format image file into the second first-format image file in accordance with the image conversion instruction, the second-format image file is generated from the image data and the second annotation information for the second-format image file both recorded in the first-format image file, and
• wherein the second annotation information is recorded in the predetermined area in the second-format image file.